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Design of optimal hybrid power system to provide reliable supply to rural areas of Ethiopia using MATLAB and Homer Renewables Pub Date : 2021-02-05 Abraham Hizkiel Nebey
Integrating different energy resources, like solar PV, wind, and hydro is used to ensure reliable power to the rural community loads. Hybrid power system offers sufficient power supply for the rural villages by providing alternative supply for intermittent nature of renewable energy resource. Hence, intermittency of renewable energy resources is a challenge to electrify the rural community in a sustainable
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Energy storage system design for large-scale solar PV in Malaysia: techno-economic analysis Renewables Pub Date : 2021-01-22 Mahmoud Laajimi; Yun Ii Go
Large-scale solar is a non-reversible trend in the energy mix of Malaysia. Due to the mismatch between the peak of solar energy generation and the peak demand, energy storage projects are essential and crucial to optimize the use of this renewable resource. Although the technical and environmental benefits of such transition have been examined, the profitability of energy storage systems combined with
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Correction to: Wind turbine performance analysis for energy cost minimization Renewables Pub Date : 2021-01-17 Yassine Charabi; Sabah Abdul-Wahab; Hamidreza Ziaiefar
An amendment to this paper has been published and can be accessed via the original article.
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Multi-thermal performance optimization of semi-circular heat pipes integrated with various solar collector profiles Renewables Pub Date : 2021-01-07 Mohammed Yunus; Mohammad S. Alsoufi
Solar collector (SC) technology has proved promising applications in heating, desalination, refrigeration of water, etc. Thermal performance (TP) of Heat Pipe (HP) improves by combining the various profiled absorber plate with a flat-plate collector. The objective is to study HP attributes' effect (heat inputs, pipe inclinations, and mass flow rates of water) with various profiles of absorber plates
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Wind turbine performance analysis for energy cost minimization Renewables Pub Date : 2020-08-17 Yassine Charabi; Sabah Abdul-Wahab
The use of wind energy worldwide has overgrown in recent years to reduce greenhouse gas emissions. Wind power is free, but the installation and maintenance of wind turbines remain very costly. The size of the installation of the wind turbine is not only determined by wind statistics at a given location, but also by turbine infrastructure and maintenance costs. The payback time of the turbine is dependent
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Sustainability economic study of the islands of the Azores archipelago using photovoltaic panels, wind energy and storage system Renewables Pub Date : 2020-08-10 Inês Melo; João Paulo Neto Torres; Carlos Alberto Ferreira Fernandes; Ricardo A. Marques Lameirinhas
Currently, the nine islands of the Autonomous Region of the Azores have fossil fuel-fired power stations as the main source of electric power. Each island has an independent electrical system classified as an isolated micro-system, given its size and location. The aim of this paper is to analyse the best set of technologies to have nine sustainable hybrid systems. For this purpose, some factors will
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Potential assessment and experimental analysis of solar vegetable dryer: in case of northern Ethiopia Renewables Pub Date : 2020-08-08 Yihun Tefera Sintie; Gebrie Teshome Aduye
The traditional vegetable drying (open-air/sun drying) method of harvesting of tomato, potato and onion in the Fogera District in Amhara regional state, Ethiopia, leads to loss of product, reduction in the quality of product and economic loss for the poor farmers. So, this experiment aimed to show the effectiveness of solar dryer technology by increasing the quality of the product in tomato, potato
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Realizing ecosystem-safe hydropower from dams. Renewables Pub Date : 2020-06-01 Shahryar Khalique Ahmad,Faisal Hossain
For clean hydropower generation while sustaining ecosystems, minimizing harmful impacts and balancing multiple water needs is an integral component. One particularly harmful effect not managed explicitly by hydropower operations is thermal destabilization of downstream waters. To demonstrate that the thermal destabilization by hydropower dams can be managed while maximizing energy production, we modelled
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Fabrication of Ag nanoparticles adhered on RGO based on both electrodes in dye-sensitized solar cells (DSSCs) Renewables Pub Date : 2020-03-03 Kongsak Pattarith; Yonrapach Areerob
The electrode plays an important role in dye-sensitized solar cells (DSSCs). Preparation of the electrode should be simple and should result in high performance of its DSSC. We herein demonstrated high-performance and easily prepared Silver nanoparticles adhered on Reduced graphene oxide–Platinum composites (Ag–RGO/Pt) as counter electrodes (CEs) and TiO2 on RGO sheets with Ag (TiO2–RGO/Ag) as photoanode
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Application-based design of the Fresnel lens solar concentrator Renewables Pub Date : 2019-08-02 Hassan Qandil; Shuping Wang; Weihuan Zhao
A novel genetically themed hierarchical algorithm (GTHA) has been investigated to design Fresnel lens solar concentrators that match with the distinct energy input and spatial geometry of various thermal applications. Basic heat transfer analysis of each application decides its solar energy requirement. The GTHA incorporated in MATLAB® optimizes the concentrator characteristics to secure this energy
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Cost–benefit analysis for optimal DG placement in distribution systems by using elephant herding optimization algorithm Renewables Pub Date : 2019-06-26 C. Hari Prasad; K. Subbaramaiah; P. Sujatha
Distributed generations (DGs) are small generating plants which are connected to consumers in distribution systems to improve the voltage profile, stability improvement, reduction in power losses and economic benefits. The above benefits can be achieved by optimal placement of DGs. In this paper, a novel nature-inspired algorithm called elephant herding optimization algorithm is used to determine the
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Impact of solvents on the extraction and purification of vegetable dyes onto the efficiency for dye-sensitized solar cells Renewables Pub Date : 2019-06-24 Javier Ramirez-Perez; Calero Maria; Cristian P. Santacruz
Eight vegetable dyes extracted from flowers, fruits and leaves abundant in the wide biodiversity of the Andes region of South America were extracted with ethanol without purification to explore as vegetable photosensitizers in dye-sensitized solar cells (DSSCs). The absorbance spectra were measured by UV–visible spectroscopy and the photoelectrical performance of the DSSCs based on these dyes with
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Assessing solar and wind complementarity in Texas Renewables Pub Date : 2018-11-16 Joanna H. Slusarewicz; Daniel S. Cohan
As wind and solar power installations proliferate, power grids will face new challenges in ensuring consistent coverage from variable renewable resources. One option to reduce variability is to integrate the output from wind and solar facilities with dissimilar temporal profiles of output. This study measured the complementarity of wind and solar resources sited in various regions of Texas. This study
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An enhanced particle swarm optimization algorithm for improving the renewable energy penetration and small signal stability in power system Renewables Pub Date : 2018-09-21 T. K. Renuka; P. Reji; Sasidharan Sreedharan
In power systems, increasing the renewable energy penetration with small signal stability is one of the demanding and critical tasks in recent days. This research work aims to develop a multistage optimization technique, namely particle swarm optimization (PSO), for improving both the energy penetration and small signal stability. Here, the wind and solar power sources are considered, and its penetration
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Self-sufficiency of 3-D printers: utilizing stand-alone solar photovoltaic power systems Renewables Pub Date : 2018-05-31 Khalid Yousuf Khan; Lucia Gauchia; Joshua M. Pearce
A self-replicating rapid prototyper (RepRap) is a type of 3-D printer capable of printing many of its own components in addition to a wide assortment of products from high-value scientific or medical tools to household products and toys. There is some evidence that these printers could provide low-cost distributed manufacturing in underprivileged rural areas. For the most isolated communities without
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Optimal DG placement for benefit maximization in distribution networks by using Dragonfly algorithm Renewables Pub Date : 2018-05-30 M. C. V. Suresh; Edward J. Belwin
Distributed generation (DG) is small generating plants which are connected to consumers in distribution systems to improve the voltage profile, voltage regulation, stability, reduction in power losses and economic benefits. The above benefits can be achieved by optimal placement of DGs. A novel nature-inspired algorithm called Dragonfly algorithm is used to determine the optimal DG units size in this
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Low-cost virtual instrumentation of PV panel characteristics using Excel and Arduino in comparison with traditional instrumentation Renewables Pub Date : 2018-03-12 Aboubakr El Hammoumi; Saad Motahhir; Abdelilah Chalh; Abdelaziz El Ghzizal; Aziz Derouich
This paper presents a low-cost solution of virtual instrumentation to provide a new technique for real-time instrumentation of the PV panel characteristics such as voltage, current and power. The system design is based on a low-cost Arduino acquisition board. The acquisition is made through a low-cost current and voltage sensors, and data are presented in Excel by using the PLX-DAQ data acquisition
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Conditions for economic competitiveness of pumped storage hydroelectric power plants in Egypt Renewables Pub Date : 2018-03-01 Diaa Abdellatif; Rameen AbdelHady; Ahmed M. Ibrahim; Essam Abu El-Zahab
Pumped storage hydroelectric power plants are one of the most applicable energy storage technologies on large-scale capacity generation due to many technical considerations such as their maturity, frequency control and higher ramp rates, thus maintaining following loads in case of high penetration of renewables in the electrical grid. Economic viability of PSHPPs is still questionable when compared
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Use coal or invest in renewables: a real options analysis of energy investments in the Philippines Renewables Pub Date : 2018-01-25 Casper Boongaling Agaton
This paper aims to analyze the comparative attractiveness of either investing in various renewable energy sources or continue using coal for electricity generation in the Philippines. Using real options approach, this research evaluates the investment value and trigger prices of coal for switching technologies with some scenarios in coal price uncertainty and social discount rate. The results find
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An experimental study on effect of dust on power loss in solar photovoltaic module Renewables Pub Date : 2017-12-21 Athar Hussain; Ankit Batra; Rupendra Pachauri
In the present study, a detailed investigation on air dust particles effect on photovoltaic (PV) model performance has been carried out. The scanning electron microscope analysis of the collected dust samples was being carried out, and the obtained images were being analyzed in order to observe the character and topography of the dust sample particles. The data for dust samples of different weights
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Comparison between Kalman filter and incremental conductance algorithm for optimizing photovoltaic energy Renewables Pub Date : 2017-12-16 Saad Motahhir; Ayoub Aoune; Abdelaziz El Ghzizal; Souad Sebti; Aziz Derouich
The purpose of this paper is to present a performance comparison between two maximum power point tracking algorithms. These two algorithms are incremental conductance (INC) which is an improved version of the perturb and observe algorithm, and the second algorithm is the Kalman filter applied to a photovoltaic system. In this work, a photovoltaic panel is modeled in PSIM tool; a Boost converter controlled
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Autoencoder for wind power prediction Renewables Pub Date : 2017-12-16 Sumaira Tasnim; Ashfaqur Rahman; Amanullah Maung Than Oo; Md. Enamul Haque
Successful integration of renewable energy sources like wind power into smart grids largely depends on accurate prediction of power from these intermittent sources. Production of wind power cannot be controlled as the wind speed can vary based on weather conditions. Accurate prediction of wind power can assist smart grid that intelligently decides on the usage of alternative power sources based on
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Optimization of the distribution of wind speeds using convexly combined Weibull densities Renewables Pub Date : 2017-12-16 Jonas Gräbner; Johannes Jahn
This paper presents a new approach for the determination of the wind speed distribution based on wind speed data. This approach is based on the fact that, in general, wind speed distributions restricted to seasons of year or months are different. Therefore, instead of one Weibull density function, a convex combination of Weibull density functions is considered for a calendar year. This model improves
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Soiling-induced transmittance losses in solar PV modules installed in Kathmandu Valley Renewables Pub Date : 2017-08-14 Basant Raj Paudyal; Shree Raj Shakya; Dhan Prasad Paudyal; Deependra Das Mulmi
Renewable energy sources are fast emerging as more reliable supplement of conventional energy sources. Among the various renewable sources, solar energy is most sought after in today’s world. Solar PV modules when installed in outdoor environments suffer from various factors which are generally unaccounted in laboratory testing. Energy generation from solar collectors is primarily dependent on the
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Evaluation of global solar radiation from meteorological data in the Sahelian zone of Chad Renewables Pub Date : 2017-08-07 Marcel Hamda Soulouknga; Ousmane Coulibaly; Serge Yamigno Doka; Timoleon Crepin Kofane
The study focuses on the evaluation of global solar radiation on a horizontal level. The estimate of the solar layer was made on the basis of mathematical model obtained from the relations of Angstrom–Prescott, Allen and Sabbagh. The different proposed models have been implemented by using MATLAB and Excel. The models were evaluated using MPE, NSE, RMSE and MBE. The outcome of this shows that the Angstrom–Prescott
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Whale optimization algorithm for optimal sizing of renewable resources for loss reduction in distribution systems Renewables Pub Date : 2017-03-07 P. Dinakara Prasad Reddy; V. C. Veera Reddy; T. Gowri Manohar
Distributed generator (DG) resources are small scale electric power generating plants that can provide power to homes, businesses or industrial facilities in distribution systems. Power loss reductions, voltage profile improvement and increasing reliability are some advantages of DG units. The above benefits can be achieved by optimal placement of DGs. Whale optimization algorithm (WOA), a novel metaheuristic
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Sensitivity analysis-based performance and economic operation of wind-integrated system with FACTS devices for optimum load dispatch Renewables Pub Date : 2017-03-07 Satish Kumar; Ashwani Kumar; Nikhlesh Kumar Sharma
Supply of additional power generation by wind system to increase total power generation is increasing exponentially and globally to meet the challenge of surplus power demand. This total power generation should be at minimum cost and power loss, without violating stability limits. This paper presents modelling and tuning of flexible A.C. Transmission system (FACTS) devices with sensitivity analysis
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A review of optimum parameter values of a passive solar still and a design for southern Bangladesh Renewables Pub Date : 2017-02-15 Md. Nazmul Islam Sarkar; Anwarul Islam Sifat; S. M. Shamim Reza; Md. Shibli Sadique
Pure and fresh water is being scarce day by day. Although Bangladesh is a riverine country, pure drinking potable water is not a cheap commodity. Most of the people in the cities boil water to drink, and people of the villages take tube-well’s water directly, which might have high amount of heavy metal like arsenic. Solar still is a cheap and very useful renewable technology, which can be used in Bangladesh
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Improving the carbon footprint of water treatment with renewable energy: a Western Australian case study Renewables Pub Date : 2016-09-08 Wahidul K. Biswas; Pauline Yek
A life cycle assessment (LCA) was carried out on three separate drinking water production options—a groundwater treatment plant (GWTP), surface water treatment plant and seawater desalination plant (electrodialysis) in order to calculate the carbon footprint associated with each process and to identify the areas of production with high levels of GHG emissions in order to develop strategies for reducing
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Effect of various model parameters on solar photovoltaic cell simulation: a SPICE analysis Renewables Pub Date : 2016-08-12 Md. Nazmul Islam Sarkar
In this paper, all the models of PV cell, namely ideal single-diode model, single-diode $$R_{\rm s}$$ model, single-diode $$R_{\rm p}$$ model, the two-diode model, and the three-diode model, have been discussed. SPICE simulation is done to evaluate the impact of model parameters on the operation of PV cell. The effects of the parameters are discussed. The photocurrent, $$I_{\rm L},$$ is proportional
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A mathematical model for ammonia solar and synthesis reactors Renewables Pub Date : 2016-06-29 Ramadan Ali Abdiwe; Markus Haider
The thermochemical system using ammonia as energy storage carrier is investigated in this study. A mathematical model was developed to predict the behavior of both reactors in the ammonia-based closed-loop system. For the importance of the dissociation and formation process in the system, the model focused only on the solar and the synthesis reactors. The study shows that maintaining the best mass
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Wind energy potential and cost estimation of wind energy conversion systems (WECSs) for electricity generation in the eight selected locations of Tigray region (Ethiopia) Renewables Pub Date : 2016-03-17 Satyanarayana Gaddada; Shiva Prashanth Kumar Kodicherla
Wind energy is one of the most cost-effective forms of renewable energy source with significant increment in yearly installed capacities all around the world. In this study, three commercial wind turbines, namely POLARIS P15-50, POLARIS P50-500 and VESTAS V110-2.0, were chosen as large-scale wind energy conversion systems (WECSs) for technical assessment of electric power generation in eight selected
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Reasons for wind turbine generator failures: a multi-criteria approach for sustainable power production Renewables Pub Date : 2016-03-16 Rajakumar D. Gowdar; M. C. Mallikarjune Gowda
Power generation quantity from wind sector is increasing at much faster rate day by day in the scenario of power systems, which obviously needs reliable operation. Therefore, accurate monitoring and error diagnosis are almost mandatory. This paper aims to identify important errors that affect the performance and can easily detect the faults of wind turbine generators (WTGs). Wind turbines are subjected
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Effects of various types of graphite on the thermal conductivity and energy storage properties of ternary eutectic fatty acid-based composite as phase change material Renewables Pub Date : 2016-03-16 Eanest B. Jebasingh
Energy is the greatest challenge facing the environment. Energy efficiency can be improved by energy storage by management of distribution networks, thereby reducing cost and improving energy usage efficiency. This research investigated the energy efficiency achieved by adding various types of graphite (e.g., flake and amorphous) to organic-based ternary eutectic mixtures like capric acid (CA)–myristic
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Estimation of solar radiation from cloud cover data of Bangladesh Renewables Pub Date : 2016-03-15 Md. Nazmul Islam Sarkar
In this study, an analysis of the monthly mean values of the fraction of the sky covered by clouds (C) of all types and the duration of bright sunshine hours (S) and global solar radiation on the horizontal surface (H) was carried out to establish relationship for solar radiation estimation for Bangladesh. The relationship between C and (1 − S/S 0), where S 0 is the maximum possible hours of sunshine
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A comparison of fuzzy logic and PID controller for a single-axis solar tracking system Renewables Pub Date : 2016-02-25 Emre Kiyak; Gokhan Gol
Proportional integral derivative controllers are widely used in industrial processes because of their simplicity and effectiveness for linear and nonlinear systems. The fuzzy controller is the most suitable for the human decision-making mechanism, providing the operation of an electronic system with decisions of experts. In addition, using the fuzzy controller for a nonlinear system allows for a reduction
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Global solar radiation estimation from commonly available meteorological data for Bangladesh Renewables Pub Date : 2016-02-25 Md. Nazmul Islam Sarkar; Anwarul Islam Sifat
In this study, several regression models were employed to estimate global solar radiation from commonly available meteorological data such as sunshine duration, temperature, precipitation, and cloud cover for 34 meteorological stations of Bangladesh. The models studied were calibrated using five meteorological stations that are providing global solar radiation as well as other meteorological data.
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A review study of photovoltaic array maximum power tracking algorithms Renewables Pub Date : 2016-02-18 Hala J. El-Khozondar; Rifa J. El-Khozondar; Khaled Matter; Teuvo Suntio
There are numerous maximum power point tracking (MPPT) algorithms for improving the energy efficiency of solar photovoltaic (PV) systems. The main differences between these algorithms are digital or analog implementation, simplicity of the design, sensor requirements, convergence speed, range of effectiveness, as well as hardware costs. Therefore, choosing the right algorithm is very important to the
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Experimental study of an inclined flat plate-type solar water distillation system Renewables Pub Date : 2016-02-18 U. Sahoo; S. K. Singh; I. Barbate; R. Kumar; P. C. Pant
Flat plate-type solar water distillation (FPSWD) is having importance for providing hot water and drinking water simultaneously to households in rural areas or small community/hotels. It utilizes solar radiation to heat the water, produce fresh water out of the saline or brackish water, and also produce hot water. The paper is focused on field performance of inclined FPSWD for domestic and commercial
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Assessment of scaling formation during solar desalination using PHREEQC modeling in El Gebail and El Qaa plain areas: southwest Sinai Renewables Pub Date : 2016-02-18 S. A. Mohallel; Safie Elden Metwally; Esam A. Gomaa; Marwa Fathy; Amr Abdellatif Sayed Alahl
The fresh water needs of mankind in regions under severe stress due to scarcity of water and energy can be satisfied if saline water which is available is converted to potable water by solar desalination. Beside salinity, scaling formation is one of the major problems that slow down heat transfer and cause system failures. Prevention and minimizing scale formation is highly important in the thermal
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Modeling and experimental evaluation of a small-scale fresnel solar concentrator system Renewables Pub Date : 2016-01-26 Luis Rafael Sanchez Vega
The purpose of this study was to evaluate the overall effectiveness of a small-scale, low cost, versatile solar concentrator suitable for the needs of single individuals. The system consisted of a spot-type fresnel lens, and a solar absorber sized for moderate temperature range (80–250 °C) applications. Simple and inexpensive materials were chosen for the construction of the tracking system, frame
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Optimal and suboptimal controller design for wind power system Renewables Pub Date : 2016-01-04 Reshma Ehtesham; Shahida Khatoon; Ibraheem Naseeruddin
Wind power is a cost-effective renewable source and can be smoothly integrated into power grid by incorporating adequate control strategies. The wind turbine prime mover, wind, is uncontrollable which makes it different from conventional generation. Therefore, it becomes very important to carry out investigations on the dynamic behavior of wind power-generating systems. In this paper, the state space
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