60 research outputs found
EFL/ESP teacher development and classroom innovation through teacher-initiated action research
No full textThis study is an investigation of the potential of teacher-initiated action research for
EFL/ESP teacher development and classroom innovation. The Collaborative Academic
Writing Research Project (CAWRP), on which it is based, was carried out at the ESP
Centre, Damascus University, in 1996-1997. It was in two phases, Baseline and
Main. The researcher, a teacher in the context, assumed a participatory and facilitating
role. The pedagogic problem was the teaching of research paper writing to
postgraduate students. The CAWRP was proposed to ease this problem and introduce
classroom innovation through teacher-initiated action research, the long-term aim of
which was continuous professional development. The baseline research aimed at
articulating a picture of teacher and context needs and assessing project viability. The
proposal was refined in the light of the findings, and a programme of teacher
development activities was agreed with the participants. This was implemented in the
Main Phase, which had three stages: Orientation, Research and Reporting, and
Summative Evaluation and Follow-up. The role of the researcher was to facilitate the
teachers to self-direct their professional learning and introduce needed pedagogic
innovations.
The thesis is in eight chapters and 32 appendices. Chapter One sets the scene
and introduces the study. Chapter Two focuses on the baseline investigation: its
methodology, findings, and their implications for the Main Phase study. Chapter Three
is a review of the relevant literature in the fields of teacher development and classroom
innovation. Chapter Four focuses on project design and methodology and gives more
details on the principles, values, strategies, and procedures that guided project
implementation and how they worked out in action. Chapter Five reports the findings,
focusing on the contribution of the Orientation Stage activities to the development of
the teacher group as a whole (a total of 20 out of 23 Centre teachers). Its main sources
of data are recordings, feedback questionnaires, and participant observation. Chapter
Six focuses on the teachers who carried out action research and reported on it (8 out
of the 20 Orientation Stage participants). It presents two case studies of frill
participants, starting with their entry points and showing how they developed in the
Research and Reporting Stage. One case exemplifies the experienced teachers and
those who did research individually, and the other the novices and those who worked in
collaboration. Chapter Seven reports on the participants' sununative evaluation of the
project and the effect of this evaluation on project continuity. Chapter Eight
summarises the main findings and evaluates them with reference to the literature, on
the one hand, and design principles and methodology, on the other. In this chapter, I
have looked critically at the lessons learnt from the study, discussed its significance and
limitations, and put forward some recommendations. The appendices include some of
the materials and documentary evidence used in the research
Modeling of wind turbine-self excited induction generator system with pitch angle and excitation capacitance control
No full textObcy Albert Camus? Przechwycenie jako postkolonialna strategia pisania na przykładzie Sprawy Meursaulta Kamela Daouda
No full textThe author makes a comparative study of The Meursault Investigation by Kamel Daoud and Albert Camus’ works (especially The Stranger and The Fall) based on the literature describing the category of détournement. The theoretical basis of the notion of détournement is reconstructed from the works of Guy Debord, Jacques Derrida and Judith Butler and it becomes the basic category in the interpretation of postcolonial literature. The main aim of the article is to highlight the importance of this category as one of the strategies of postcolonial writing. The author claims that the purpose of using interception in literature is to renegotiate the structure of the canon and position of writers excluded from its structure because of economic, political and cultural conditions. In the first part of the article, the author points out the essential differentiators of détournement. She introduces the formula of the structure of the literary canon created by David Damrosch. Next she analyses two literary narrations dialoguing with each other. Comparison of the canonical story about Meursault’s murder and trial by Camus and The Meursault Investigation by Daoud reveals a strict relation between these novels. In Daoud’s story, the narration is inverted—the perspective of a victim, which is expressed by the brother of nameless Arab, dominates in the book. The analysis ends with the conclusion that détournement of a canonical work, and its recontextualization, is a more revolutionary gesture, made by postcolonial writers, who want to renegotiate their position in the structure of the canon, compared to nativist, utopian reproduction of the precolonial past. The choice of this particular strategy of writing confirms the truth of two claims of which Daoud is aware (as evidenced in novel): first, that every literary work is iterable and, second, that every revolution is only an apparent renouncement. W oparciu o literaturę poświęconą kategorii przechwycenia autorka przeprowadza komparatystyczną analizę Sprawy Meursaulta Kamela Daouda oraz dzieł Alberta Camusa (zwłaszcza Obcego i Upadku). Teoria przechwycenia zrekonstruowana na podstawie pism Guy Deborda, Jacquesa Derridy oraz Judith Butler staje się podstawą dla interpretacji literatury postkolonialnej. Celem artykułu jest wskazanie przechwycenia jako jednej z postkolonialnych strategii tworzenia narracji. Według autorki jej istotą jest renegocjacja struktury kanonu i miejsca twórców wyłączonych – ze względu na ekonomiczne, polityczne i kulturowe uwarunkowania – z pełnego udziału w jego współtworzeniu. W pierwszej części artykułu autorka przedstawia podstawowe wyróżniki przechwycenia oraz struktury kanonu literackiego sformułowanej przez Davida Damroscha. Dalej przeanalizowane zostały dwie dialogujące ze sobą narracje literackie. Porównanie usankcjonowanej w kanonie opowieści o morderstwie i procesie Meursaulta Camusa oraz Sprawy Meursaulta Daouda ujawnia ścisłe związki między dwiema powieściami. W opowieści Daouda odwrócona została narracja o wydarzeniach – w książce dominuje perspektywa ofiary, której wyrazicielem jest brat zabitego przez Meursaulta bezimiennego Araba. Przeprowadzona analiza prowadzi do wniosku, że przechwycenie utworu kanonicznego i jego rekontekstualizacja jest bardziej rewolucyjnym gestem pisarzy postkolonialnych, pragnących wynegocjować własne miejsce w obrębie kanonu, niż natywistyczne, utopijne odtwarzanie przedkolonialnej przeszłości. Wybór tej strategii pisania świadczy o autorskiej świadomości dwojakiego rodzaju: każda literatura jest iterowalna, a każda rewolucja jest tylko pozornym zerwaniem
Design of power control circuit for grid-connected PV system-based neural network
No full textThis research explores the application of neural networks in managing grid- photovoltaic (PV) systems. this paper aims to improve the performance and reliability of PV systems using artificial intelligence capabilities, specifically neural networks. The main emphasis of this system is to control active and reactive power and to track the maximum power point (MPPT). This study introduces an intelligent control technique for fuel cell distributed generation (DG) grid connection inverters. The algorithm allows for the management of both active and reactive power for the unit. The algorithm provides local reactive power compensation, making it economically viable. The controller modeling and performance validation are conducted using MATLAB/Simulink and Sim power system blocks, demonstrating its capacity for enhancing power factor. This makes fuel cell technology a clean, highly controllable, and economically viable option for DG systems. The system maximizes the energy extraction of PV panels and maintains them at their ideal PowerPoint across various environmental conditions. It also raises the voltage from 260 volts to 350 volts. Simulations and practical evaluations validate the proposed control system. The obtained results indicate that the total harmonic distortion (THD) of the grid current under operating conditions was less than 1.86%. This demonstrates significant improvements in the efficiency and reliability of PV systems. The neural network controller shows remarkable flexibility and the ability to quickly adapt to fluctuations in load and radiation, which contributes to developing a more sustainable and stable energy network
A study of voltage regulation in microgrid using a DSTATCOM
No full textA well-prepared abstract enables the reader to identify the basic content. This paper
presents the solution of voltage fluctuations in urgent situations by providing
voltage and reactive support from a distribution static synchronous
compensator (DSTATCOM) in the grid. Also, it analyses the influences of
DSTATCOM as a voltage controller and compares the system performance
with and without DSTATCOM. The DSTATCOM is used in the study to
maintain voltage in the microgrid (MG) to be around the rated value after
Microgrid disturbance. A successful simulink model of the photovoltaic (PV)
system and the proposed DSTATCOM are illustrated to work together as
the Microgrid. Microgrids could provide unique resilience and reliability when
the environment encountered with less water, higher temperatures, more frequent
and harsh wildfires, and severe weather events. The proposed DSTATCOM was
installed in different locations in the MG and the best location was chosen to
achieve the goal of improved power quality and efficiency. In this paper,
two scenarios are discussed with and without DSTATCOM. The simulation results
show the difference between the MG with and without DSTATCOM and how
the DSTATCOM can amplify power quality in the Microgrid. The proposed
DSTATCOM has the capability to improve dampen power oscillations during
transit events
Design and simulation of a microgrid for TIH campus
No full textThis paper proposes a methodology for designing and operating a microgrid (MG) for the main campus of the Technical Institution Hawija. In this MG, a battery energy storage system (BESS), photovoltaic (PV) generation system, and controllable loads are included. Due to the high penetration of the PVs, over-voltage issues may occur in this MG. A novel operation strategy is considered by coordinating the BESS, PVs, and loads to prevent power outages and accomplish a secure operation of this MG. In this proposed approach, droop controllers have been implemented to provide the appropriate references for the PVs and BESS to maintain the voltage of the MG within a secure range. The generation of the PVs may be curtailed to guarantee the fidelity of the voltage. The intended simulations will be based on MATLAB/Simulink to show the efficacy of the intended design
Arduino-based design and implementation of experimental rooms with a trombe wall for solar cells applications
No full textThe simplicity of design and construction following the researcher's or company's notion is the most typical description of solar panels. There will be a set of sensors in every design to derive information about the environment's shifting seasons and days. Two chambers of 1 m2 and 2 m2 in height were constructed for this study. A solar panel made from a unique exchangeable material has been installed instead of one of the walls, allowing a space between them for experimental reasons. Several temperature sensors were mounted inside and outside the chamber, as well as on the surface of the solar panel and within the air openings, in this work to record the temperature readings in various places. The used controller, an Arduino, is in charge of several operations, including controlling the solar panel's cooling device, reading and recording sensor data and storing it in RAM, controlling the orientation of the solar panel, controlling the vacuums, and regulating the on-off time of the motors. The findings show that by using sensor data, the system can keep the temperature constant when it is turned on. Additionally, the battery life will be preserved to the greatest extent feasible thanks to the well-balanced regulation of the loads
Optimization of PV/T Solar Water Collector based on Fuzzy Logic Control
No full textHybrid solar collector (PV/T) is designed to produce electricity, hot water, or hot air at the same time as they operate solar cells and solar heaters in one system. This system is designed to increase the electrical efficiency of solar cells by absorbing heat from these cells. The fuzzy logic (FL) is a tool usually used to optimize the operation of the systems. In this paper, the FL is to monitor and correct the mainsystem parameters to remain optimization efficiency at a better level. Three affected variables were studied: Effect of reflective mirrors, the effect of the glass cover, and the effect of the lower reflector angle on the performance of the PV / T hybrid solar system. These three parameters are traveled to be inputs for the FL, and the PV temperature in addition to system efficiency is the output for it. The effect of solar radiation was found to have a great effect on the efficiency of the hybrid solar collector. The thermal efficiency was 82% for the given value of the PV and mirrors, while the efficiency down to 50 for another angle. By using the artificial intelligent the system behavior depends on its output, which called feedback close loop control, at a real-time process that optimizes the system efficiency and its output
Performance Assessment of a Triangular Integrated Collector Using Neural Networks
No full textA numerical study is achieved on a new shape of temperature saver solar collector using an
artificial neural network. The storage collector is a triangle face and a right triangle pyramid for
the volumetric shape. It is obtained by cutting a cube from one upper corner at 45°, down to
the opposite hypotenuse of the base of the cube. The numerical study was carried out using the
computational fluid dynamics code (ANSYS-Fluent) software with natural convection phenomenon
in the pyramid enclosure. Elman backpropagation network is used for his ability to find the
nearest solution with the smallest error rate. The network consists of three layers, each of
different corresponding weights. The results show that the temperature and velocity distributions
throughout the operating period were obtained. The influence of introducing an internal partition
inside the triangular storage collector was investigated. Also the optimum geometry and location
for this partition were obtained. The enhancement was best at y = 0.25 m, whereas the height
of triangular collector was 0.5 m. The hourly system performance was evaluated for all test
conditions. The performance of the NN to train a model for this work was 0.000207, while the
error of the calculation was 1×10-2 as average
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