subject:(RDE)

Dalhousie University

1. Nikbakht, Saeed. Remotely Controlled Video Surveillance Monitoring System Using Microsoft Robotics Studio.

Degree: Master of Applied Science, Department of Process Engineering and Applied Science, 2014, Dalhousie University

► Robots consist of several mechanical and electronics parts. To accomplish a task, concurrency and coordination between these parts are required. The complexity of this combination… (more)

▼ Robots consist of several mechanical and electronics parts. To accomplish a task, concurrency and coordination between these parts are required. The complexity of this combination makes programming of a robot complicated and time consuming. Robotic development environments (RDEs) were introduced to address this issue by providing a framework for robotics developers, which consists of programming tools, program components, and solutions to common robotics challenges. Robotic programmers can take advantage of the tools shipped with an RDE and use already developed components in their programs. These robotic frameworks offer some solutions such as teleoperation, distribution of processes, and predictive display. Some of them also provide a simulation environment where developers can test their codes on a simulated model of a robot, without creating or purchasing the actual robot. In this thesis, some of the most popular RDEs are briefly reviewed and one is selected. Microsoft Robotics Development Studio (MRDS) is the RDE that was chosen to program an existing wire-suspended video monitoring surveillance robotic system. The service-oriented architecture of MRDS makes all programs developed in this framework capable of working with the network and using the Internet as an infrastructure for teleoperation. Also, the same architecture allows distribution of processes (services) between multiple computers. In addition, the powerful simulation environment of MRDS could be used as a predictive display, allowing operators to predict and monitor the reaction to their commands; when the simulated model of the robot responds to the operator's commands at the same time as the actual robot. The goal of this thesis was to validate several solutions of MRDS and examine its ease of use and its helpfulness in speeding up the implementation of robotics programs. Despite the capabilities these RDEs provide, they present unique challenges for programmers. This experiment was completed by developing new MRDS services, using the existing components, and customizing the existing codes. Some of the features of MRDS are demonstrated in the final project, letting the operator control the robot over the Internet simultaneously with the simulated model of the robot. Also, distribution of processes between several computers is tested successfully. The experiment showed that the selected RDE has powerful capabilities and helpful tools for developers but it has a long learning curve due to its complexity which also slows down the development of services and hence the delivery of the final product. Advisors/Committee Members: Dr. Jason Gu (external-examiner), Dr. Mark Gibson (graduate-coordinator), Dr. Azadeh Kermanshahi-Pour (thesis-reader), Dr. Ken Wilkie (thesis-supervisor), Dr. Chris Watts (thesis-supervisor), Not Applicable (ethics-approval), Not Applicable (manuscripts), Not Applicable (copyright-release).

Subjects/Keywords: Robotics; RDE; Microsoft Robotics Studio

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APA (6^th Edition):

Nikbakht, S. (2014). Remotely Controlled Video Surveillance Monitoring System Using Microsoft Robotics Studio. (Masters Thesis). Dalhousie University. Retrieved from http://hdl.handle.net/10222/56024

Chicago Manual of Style (16^th Edition):

Nikbakht, Saeed. “Remotely Controlled Video Surveillance Monitoring System Using Microsoft Robotics Studio.” 2014. Masters Thesis, Dalhousie University. Accessed February 28, 2021. http://hdl.handle.net/10222/56024.

MLA Handbook (7^th Edition):

Nikbakht, Saeed. “Remotely Controlled Video Surveillance Monitoring System Using Microsoft Robotics Studio.” 2014. Web. 28 Feb 2021.

Vancouver:

Nikbakht S. Remotely Controlled Video Surveillance Monitoring System Using Microsoft Robotics Studio. [Internet] [Masters thesis]. Dalhousie University; 2014. [cited 2021 Feb 28]. Available from: http://hdl.handle.net/10222/56024.

Council of Science Editors:

Nikbakht S. Remotely Controlled Video Surveillance Monitoring System Using Microsoft Robotics Studio. [Masters Thesis]. Dalhousie University; 2014. Available from: http://hdl.handle.net/10222/56024

Brno University of Technology

2. Talába, Michal. Neplatinové katalyzátory pro palivové články s iontoměničovou membránou: Nonplatinum catalysts for polymer exchange membrane fuel cells.

Degree: 2019, Brno University of Technology

URL: http://hdl.handle.net/11012/34152

► This work brings a study about non-platinum catalysts, alkaline membranes and methods that interprets catalytic activity. Work deals with a research on non-platinum catalysts based… (more)

Subjects/Keywords: Palivový článok; katalyzátor; MnO2; oxid manganičitý; alkalické membrány; voltametria; RDE; Fuel cell; catalyst; MnO2; manganese oxide; alkaline membranes; voltammetry; RDE

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APA (6^th Edition):

Talába, M. (2019). Neplatinové katalyzátory pro palivové články s iontoměničovou membránou: Nonplatinum catalysts for polymer exchange membrane fuel cells. (Thesis). Brno University of Technology. Retrieved from http://hdl.handle.net/11012/34152

Note: this citation may be lacking information needed for this citation format:
Not specified: Masters Thesis or Doctoral Dissertation

Chicago Manual of Style (16^th Edition):

Talába, Michal. “Neplatinové katalyzátory pro palivové články s iontoměničovou membránou: Nonplatinum catalysts for polymer exchange membrane fuel cells.” 2019. Thesis, Brno University of Technology. Accessed February 28, 2021. http://hdl.handle.net/11012/34152.

Note: this citation may be lacking information needed for this citation format:
Not specified: Masters Thesis or Doctoral Dissertation

MLA Handbook (7^th Edition):

Talába, Michal. “Neplatinové katalyzátory pro palivové články s iontoměničovou membránou: Nonplatinum catalysts for polymer exchange membrane fuel cells.” 2019. Web. 28 Feb 2021.

Vancouver:

Talába M. Neplatinové katalyzátory pro palivové články s iontoměničovou membránou: Nonplatinum catalysts for polymer exchange membrane fuel cells. [Internet] [Thesis]. Brno University of Technology; 2019. [cited 2021 Feb 28]. Available from: http://hdl.handle.net/11012/34152.

Note: this citation may be lacking information needed for this citation format:
Not specified: Masters Thesis or Doctoral Dissertation

Council of Science Editors:

Talába M. Neplatinové katalyzátory pro palivové články s iontoměničovou membránou: Nonplatinum catalysts for polymer exchange membrane fuel cells. [Thesis]. Brno University of Technology; 2019. Available from: http://hdl.handle.net/11012/34152

Note: this citation may be lacking information needed for this citation format:
Not specified: Masters Thesis or Doctoral Dissertation

Universidade do Rio Grande do Norte

3. Germano, Amanda Lucena. Análise de desempenho de abordagens orientadas a fluxo de dados aplicadas à detecção de falhas de processos industriais .

Degree: 2017, Universidade do Rio Grande do Norte

URL: http://repositorio.ufrn.br/handle/123456789/24547

► In order to increase product quality and process performance, the degree of automation has grown significantly in industries. As a result, systems are increasingly complex… (more)

Subjects/Keywords: Detecção de falhas; Fluxo de dados; TEDA; RDE,R-PCA

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APA (6^th Edition):

Germano, A. L. (2017). Análise de desempenho de abordagens orientadas a fluxo de dados aplicadas à detecção de falhas de processos industriais . (Masters Thesis). Universidade do Rio Grande do Norte. Retrieved from http://repositorio.ufrn.br/handle/123456789/24547

Chicago Manual of Style (16^th Edition):

Germano, Amanda Lucena. “Análise de desempenho de abordagens orientadas a fluxo de dados aplicadas à detecção de falhas de processos industriais .” 2017. Masters Thesis, Universidade do Rio Grande do Norte. Accessed February 28, 2021. http://repositorio.ufrn.br/handle/123456789/24547.

MLA Handbook (7^th Edition):

Germano, Amanda Lucena. “Análise de desempenho de abordagens orientadas a fluxo de dados aplicadas à detecção de falhas de processos industriais .” 2017. Web. 28 Feb 2021.

Vancouver:

Germano AL. Análise de desempenho de abordagens orientadas a fluxo de dados aplicadas à detecção de falhas de processos industriais . [Internet] [Masters thesis]. Universidade do Rio Grande do Norte; 2017. [cited 2021 Feb 28]. Available from: http://repositorio.ufrn.br/handle/123456789/24547.

Council of Science Editors:

Germano AL. Análise de desempenho de abordagens orientadas a fluxo de dados aplicadas à detecção de falhas de processos industriais . [Masters Thesis]. Universidade do Rio Grande do Norte; 2017. Available from: http://repositorio.ufrn.br/handle/123456789/24547

4. Rodriguez Rodriguez de Guzman, J. (author). A general RDE-based simulator for statistical timing analysis.

Degree: 2012, Delft University of Technology

URL: http://resolver.tudelft.nl/uuid:98f9e876-5826-45bd-92ce-3f65e474582a

►

Accurate timing analysis of digital integrated circuits is becoming harder to achieve with current and future CMOS technologies. The shrinking feature sizes lead to increasingly… (more)

Subjects/Keywords: timing; simulation; statistical; RDE

…analysis 4.1 RDE-based PV sensitivity calculation . . . . . . . . . . . . . . . . . . . 4.2… …LMS LUT LTE MC MISS MNA NA NLDM NR OCL ODE PDF PLTE PV RTL RV SSTA SSTM STA STA SVW RDE TR… …random differential equations (RDE). As a result, the deterministic voltage waveforms… …this step, the ISE uses a custom integration method which solves the RDE derived system of…

14 more images…

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APA (6^th Edition):

Rodriguez Rodriguez de Guzman, J. (. (2012). A general RDE-based simulator for statistical timing analysis. (Masters Thesis). Delft University of Technology. Retrieved from http://resolver.tudelft.nl/uuid:98f9e876-5826-45bd-92ce-3f65e474582a

Chicago Manual of Style (16^th Edition):

Rodriguez Rodriguez de Guzman, J (author). “A general RDE-based simulator for statistical timing analysis.” 2012. Masters Thesis, Delft University of Technology. Accessed February 28, 2021. http://resolver.tudelft.nl/uuid:98f9e876-5826-45bd-92ce-3f65e474582a.

MLA Handbook (7^th Edition):

Rodriguez Rodriguez de Guzman, J (author). “A general RDE-based simulator for statistical timing analysis.” 2012. Web. 28 Feb 2021.

Vancouver:

Rodriguez Rodriguez de Guzman J(. A general RDE-based simulator for statistical timing analysis. [Internet] [Masters thesis]. Delft University of Technology; 2012. [cited 2021 Feb 28]. Available from: http://resolver.tudelft.nl/uuid:98f9e876-5826-45bd-92ce-3f65e474582a.

Council of Science Editors:

Rodriguez Rodriguez de Guzman J(. A general RDE-based simulator for statistical timing analysis. [Masters Thesis]. Delft University of Technology; 2012. Available from: http://resolver.tudelft.nl/uuid:98f9e876-5826-45bd-92ce-3f65e474582a

Universitat Politècnica de València

5. Patil, Chaitanya Yashvant. Effects of EGR transient operation on emissions and performance of automotive engines during RDE cycles.

Degree: 2020, Universitat Politècnica de València

URL: http://hdl.handle.net/10251/149498

► [ES] Hoy en día, las regulaciones sobre emisiones de los automóviles se están haciendo más estrictas. Además de los ciclos de homologación estándar, actualmente se… (more)

▼ [ES] Hoy en día, las regulaciones sobre emisiones de los automóviles se están haciendo más estrictas. Además de los ciclos de homologación estándar, actualmente se están empezando a considerar nuevos métodos de homologación que tienen en cuenta las condiciones reales que se dan en la carretera. Los sistemas de Recirculación de Gases de Escape (EGR) son estrategias que han demostrado ser efectivas durante estacionarios y que también pueden ser usadas en ese tipo de ciclos dinámicos que corresponden a condiciones reales de conducción. Esta tesis se centra en la implementación de diferentes sistemas EGR para su uso en condiciones dinámicas en motores diésel turbosobrealimentados. En primer lugar, se lleva a cabo un análisis del ciclo de conducción para identificar las operaciones específicas de tipo transitorio más frecuentes en los ciclos dinámicos como WLTC y RDE. Los resultados muestran que la frecuencia en la que se producen fuertes transitorios en carga es mayor que en la que se producen transitorios de velocidad. Entre ellos, el número de operaciones de tipo Tip-out es superior a las de tipo Tip-Ins, especialmente en el rango de 1250-2000 rpm. Estos fuertes transitorios se repiten en el banco de ensayos de motor equipado con analizadores de gas de alta frecuencia, de forma que se registran la concentración instantánea de CO2 y NOx. También se ha realizado un estudio paramétrico de la actuación de la válvula de EGR durante la operación de varios transitorios fuertes, cuantificando el retraso en el transporte, la concentración de NOx y las partículas. El lazo de EGR de baja presión, LPEGR, ha resultado ser más efectivo cuando se operaba a plena carga, así como durante los transitorios, comparado con el lazo de EGR de alta presión, HPEGR. De esta forma, se propone la válvula de control más adecuada para LPEGR, lo que puede ser útil para la calibración de los transitorios de los motores diésel turbosobrealimentados. Además de ello, se señala el compromiso entre rendimiento y emisiones durante los transitorios de EGR. Al implementar la recirculación de los gases de escape a lo largo de todo el mapa del motor se minimiza la aparición de picos inesperados de emisión de NOx. Concretamente, las estrategias LPEGR consiguen reducir alrededor de un 20-60% los NOx emitidos durante los primeros pocos segundos con menos de un 5% de penalización en el rendimiento. Adicionalmente, en el documento también se presentan las simulaciones que se han realizado de los modelos unidimensionales de los transitorios. El control de la turbina de geometría variable juega un papel importante a la hora de calibrar el modelo para transitorios de EGR. Además de ello, se lleva a cabo una optimización de la separación de EGR para varios puntos estacionarios por medio de simulaciones que están basadas en el compromiso entre rendimiento y emisiones. Además, se propone un algoritmo para optimizar la separación de EGR, reduciendo en alrededor de un 80% el tiempo de cálculo de un DOE o un método de algoritmo genético. Finalmente, se crea un modelo… Advisors/Committee Members: Galindo Lucas, José (advisor).

Subjects/Keywords: Transient EGR; Hybrid EGR; RDE; WLTC; NOx; Soot

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APA (6^th Edition):

Patil, C. Y. (2020). Effects of EGR transient operation on emissions and performance of automotive engines during RDE cycles. (Doctoral Dissertation). Universitat Politècnica de València. Retrieved from http://hdl.handle.net/10251/149498

Chicago Manual of Style (16^th Edition):

Patil, Chaitanya Yashvant. “Effects of EGR transient operation on emissions and performance of automotive engines during RDE cycles. ” 2020. Doctoral Dissertation, Universitat Politècnica de València. Accessed February 28, 2021. http://hdl.handle.net/10251/149498.

MLA Handbook (7^th Edition):

Patil, Chaitanya Yashvant. “Effects of EGR transient operation on emissions and performance of automotive engines during RDE cycles. ” 2020. Web. 28 Feb 2021.

Vancouver:

Patil CY. Effects of EGR transient operation on emissions and performance of automotive engines during RDE cycles. [Internet] [Doctoral dissertation]. Universitat Politècnica de València; 2020. [cited 2021 Feb 28]. Available from: http://hdl.handle.net/10251/149498.

Council of Science Editors:

Patil CY. Effects of EGR transient operation on emissions and performance of automotive engines during RDE cycles. [Doctoral Dissertation]. Universitat Politècnica de València; 2020. Available from: http://hdl.handle.net/10251/149498

University of Cincinnati

6. Wilhite, Jarred M. Investigation of Various Novel Air-Breathing Propulsion Systems.

Degree: MS, Engineering and Applied Science: Aerospace Engineering, 2016, University of Cincinnati

URL: http://rave.ohiolink.edu/etdc/view?acc_num=ucin147981623341895

► The current research investigates the operation and performance of various air-breathing propulsion systems, which are capable of utilizing different types of fuel. This study first… (more)

▼ The current research investigates the operation and performance of various air-breathing propulsion systems, which are capable of utilizing different types of fuel. This study first focuses on a modular RDE configuration, which was mainly studied to determine which conditions yield stable, continuous rotating detonation for an ethylene-air mixture. The performance of this RDE was analyzed by studying various parameters such as mass flow rate, equivalence ratios, wave speed and cell size. For relatively low mass flow rates near stoichiometric conditions, a rotating detonation wave is observed for an ethylene-RDE, but at speeds less than an ideal detonation wave.The current research also involves investigating the newly designed, Twin Oxidizer Injection Capable (TOXIC) RDE. Mixtures of hydrogen and air were utilized for this configuration, resulting in sustained rotating detonation for various mass flow rates and equivalence ratios. A thrust stand was also developed to observe and further measure the performance of the TOXIC RDE. Further analysis was conducted to accurately model and simulate the response of thrust stand during operation of the RDE.Also included in this research are findings and analysis of a propulsion system capable of operating on the Inverse Brayton Cycle. The feasibility of this novel concept was validated in a previous study to be sufficient for small-scale propulsion systems, namely UAV applications. This type of propulsion system consists of a reorganization of traditional gas turbine engine components, which incorporates expansion before compression. This cycle also requires a heat exchanger to reduce the temperature of the flow entering the compressor downstream. While adding a heat exchanger improves the efficiency of the cycle, it also increases the engine weight, resulting in less endurance for the aircraft. Therefore, this study focuses on the selection and development of a new heat exchanger design that is lightweight, and is capable of transferring significant amounts of heat and improving the efficiency and performance of the propulsion system. Advisors/Committee Members: Gutmark, Ephraim (Committee Chair).

Subjects/Keywords: Aerospace Materials; Rotating Detonation Engine; RDE; Inverse Brayton Cycle

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APA (6^th Edition):

Wilhite, J. M. (2016). Investigation of Various Novel Air-Breathing Propulsion Systems. (Masters Thesis). University of Cincinnati. Retrieved from http://rave.ohiolink.edu/etdc/view?acc_num=ucin147981623341895

Chicago Manual of Style (16^th Edition):

Wilhite, Jarred M. “Investigation of Various Novel Air-Breathing Propulsion Systems.” 2016. Masters Thesis, University of Cincinnati. Accessed February 28, 2021. http://rave.ohiolink.edu/etdc/view?acc_num=ucin147981623341895.

MLA Handbook (7^th Edition):

Wilhite, Jarred M. “Investigation of Various Novel Air-Breathing Propulsion Systems.” 2016. Web. 28 Feb 2021.

Vancouver:

Wilhite JM. Investigation of Various Novel Air-Breathing Propulsion Systems. [Internet] [Masters thesis]. University of Cincinnati; 2016. [cited 2021 Feb 28]. Available from: http://rave.ohiolink.edu/etdc/view?acc_num=ucin147981623341895.

Council of Science Editors:

Wilhite JM. Investigation of Various Novel Air-Breathing Propulsion Systems. [Masters Thesis]. University of Cincinnati; 2016. Available from: http://rave.ohiolink.edu/etdc/view?acc_num=ucin147981623341895

Virginia Tech

7. Subramanian, Sathyanarayanan. Novel Approach for Computational Modeling of a Non-Premixed Rotating Detonation Engine.

Degree: MS, Mechanical Engineering, 2019, Virginia Tech

URL: http://hdl.handle.net/10919/101777

► Detonation cycles are identified as an efficient alternative to the Brayton cycles used in power and propulsion applications. Rotating Detonation Engine (RDE) operating on a… (more)

▼ Detonation cycles are identified as an efficient alternative to the Brayton cycles used in power and propulsion applications. Rotating Detonation Engine (RDE) operating on a detonation cycle works by compressing the working fluid across a detonation wave, thereby reducing the number of compressor stages required in the thermodynamic cycle. Numerical analyses of RDEs are flexible in understanding the flow field within the RDE, however, three-dimensional analyses are expensive due to the differences in time-scale required to resolve the combustion process and flow-field. The alternate two-dimensional analyses are generally modeled with perfectly premixed fuel injection and do not capture the effects of improper mixing arising due to discrete injection of fuel and oxidizer into the chamber. To model realistic injection in a 2-D analysis, the current work uses an approach in which, a Probability Density Function (PDF) of the fuel mass fraction at the chamber inlet is extracted from a 3-D, cold-flow simulation and is used as an inlet boundary condition for fuel mass fraction in the 2-D analysis. The 2-D simulation requires only 0.4% of the CPU hours for one revolution of the detonation compared to an equivalent 3-D simulation. Using this method, a perfectly premixed RDE is comparing with a non-premixed case. The performance is found to vary between the two cases. The mean detonation velocities, time-averaged static pressure profiles are found to be similar between the two cases, while the local detonation velocities and peak pressure values vary in the non-premixed case due to local pockets fuel rich/lean mixtures. The mean detonation cell sizes are similar, but the distribution in the non-premixed case is closer due to stronger shock structures. An analytical method is used to check the effects of fuel-product stratification and heat loss from the RDE and these effects adversely affect the local detonation velocity. Overall, this method of modeling captures the complex physics in an RDE with the advantage of reduced computational cost and therefore can be used for design and diagnostic purposes. Advisors/Committee Members: Meadows, Joseph (committeechair), Massa, Luca (committee member), Bairaktarova, Diana (committee member), Tafti, Danesh K. (committee member).

Subjects/Keywords: Rotating Detonation Engine (RDE); Non-Premixed Combustion; Computational Fluid Dynamics (CFD)

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APA (6^th Edition):

Subramanian, S. (2019). Novel Approach for Computational Modeling of a Non-Premixed Rotating Detonation Engine. (Masters Thesis). Virginia Tech. Retrieved from http://hdl.handle.net/10919/101777

Chicago Manual of Style (16^th Edition):

Subramanian, Sathyanarayanan. “Novel Approach for Computational Modeling of a Non-Premixed Rotating Detonation Engine.” 2019. Masters Thesis, Virginia Tech. Accessed February 28, 2021. http://hdl.handle.net/10919/101777.

MLA Handbook (7^th Edition):

Subramanian, Sathyanarayanan. “Novel Approach for Computational Modeling of a Non-Premixed Rotating Detonation Engine.” 2019. Web. 28 Feb 2021.

Vancouver:

Subramanian S. Novel Approach for Computational Modeling of a Non-Premixed Rotating Detonation Engine. [Internet] [Masters thesis]. Virginia Tech; 2019. [cited 2021 Feb 28]. Available from: http://hdl.handle.net/10919/101777.

Council of Science Editors:

Subramanian S. Novel Approach for Computational Modeling of a Non-Premixed Rotating Detonation Engine. [Masters Thesis]. Virginia Tech; 2019. Available from: http://hdl.handle.net/10919/101777

Brno University of Technology

8. Weidenhöfer, Jan. Problematika hodnocení produkce škodlivin ve výfukových plynech osobních vozidel: Issues of legislative tests in the assessment of exhaust pollutants.

Degree: 2019, Brno University of Technology

URL: http://hdl.handle.net/11012/176904

► This work deals with issues of emissions in passenger cars with a focus on legislative tests in the European Union. At first, the reader is… (more)

Subjects/Keywords: Emise; emisní test; emisní norma; automobil; homologace; NEDC; WLTP; měření v reálném provozu; RDE; Emissions; emission tests; automobile; emission standard; homologation; NEDC; WLTP; measurements in real operation; RDE

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APA · Chicago · MLA · Vancouver · CSE | Export to Zotero / EndNote / Reference Manager

APA (6^th Edition):

Weidenhöfer, J. (2019). Problematika hodnocení produkce škodlivin ve výfukových plynech osobních vozidel: Issues of legislative tests in the assessment of exhaust pollutants. (Thesis). Brno University of Technology. Retrieved from http://hdl.handle.net/11012/176904

Note: this citation may be lacking information needed for this citation format:
Not specified: Masters Thesis or Doctoral Dissertation

Chicago Manual of Style (16^th Edition):

Weidenhöfer, Jan. “Problematika hodnocení produkce škodlivin ve výfukových plynech osobních vozidel: Issues of legislative tests in the assessment of exhaust pollutants.” 2019. Thesis, Brno University of Technology. Accessed February 28, 2021. http://hdl.handle.net/11012/176904.

Note: this citation may be lacking information needed for this citation format:
Not specified: Masters Thesis or Doctoral Dissertation

MLA Handbook (7^th Edition):

Weidenhöfer, Jan. “Problematika hodnocení produkce škodlivin ve výfukových plynech osobních vozidel: Issues of legislative tests in the assessment of exhaust pollutants.” 2019. Web. 28 Feb 2021.

Vancouver:

Weidenhöfer J. Problematika hodnocení produkce škodlivin ve výfukových plynech osobních vozidel: Issues of legislative tests in the assessment of exhaust pollutants. [Internet] [Thesis]. Brno University of Technology; 2019. [cited 2021 Feb 28]. Available from: http://hdl.handle.net/11012/176904.

Note: this citation may be lacking information needed for this citation format:
Not specified: Masters Thesis or Doctoral Dissertation

Council of Science Editors:

Weidenhöfer J. Problematika hodnocení produkce škodlivin ve výfukových plynech osobních vozidel: Issues of legislative tests in the assessment of exhaust pollutants. [Thesis]. Brno University of Technology; 2019. Available from: http://hdl.handle.net/11012/176904

Note: this citation may be lacking information needed for this citation format:
Not specified: Masters Thesis or Doctoral Dissertation

Universiteit Utrecht

9. Steiner, F.A. Small RNAs and Argonaute proteins: key players in post-transcriptional gene silencing.

Degree: 2007, Universiteit Utrecht

URL: http://dspace.library.uu.nl:8080/handle/1874/23784

► Small RNAs are important transcriptional and post-transcriptional regulators of gene expression. Many classes of small RNAs have been discovered, each carrying out specialized functions. siRNAs… (more)

▼ Small RNAs are important transcriptional and post-transcriptional regulators of gene expression. Many classes of small RNAs have been discovered, each carrying out specialized functions. siRNAs and miRNAs are best studies. siRNAs function in the process of RNAi and are thought to defend the genome against molecular parasites. They have become widely used tools in biomedical research. miRNAs are abundant and conserved; they form a class of endogenous small RNAs that fine-tunes gene expression. Most, if not all, small RNAs function through association with members of the Argonaute protein family. This thesis focuses on the function of small RNAs and Argonaute proteins in RNAi and the miRNA pathway. To understand the role of miRNAs in development, we aimed to catalogue the zebrafish miRNAs and analyze their expression. By sequencing miRNA libraries from 5-day-old zebrafish larvae and adult zebrafish brain, we found 139 known and 66 new miRNAs. We analyzed the temporal and spatial expression patterns of 67 miRNAs by whole mount in situ hybridization and northern blot analysis. Most miRNAs are expressed during later stages of development, often in a tissue specific manner. Most newly discovered miRNAs have low expression levels and are less conserved in other vertebrate species. We also analyzed the connection between the miRNAs and Argonaute proteins in C. elegans. The Argonaute proteins required for the miRNA pathway are ALG-1 and ALG-2. We used massively parallel sequencing to analyze the spectrum of small RNAs associated with ALG-1. We found that this protein almost exclusively binds to miRNAs. In addition to 84 known miRNAs, we found ten novel miRNAs. RNAi is an amplified process in C. elegans. In the amplification step, RNA-directed RNA polymerases (RdRPs) produce secondary siRNAs, which we cloned from transgenic lines expressing a single primary siRNA. We found that RdRPs perform unprimed RNA synthesis to generate secondary siRNAs, and that mRNAs which are not cleaved by the primary siRNA-Argonaute complex can be used as substrates. Secondary siRNAs are only of antisense polarity, carry 5' di- or triphosphates, and are only in the minority associated with RDE-1, the primary siRNA-binding Argonaute protein. Therefore, secondary siRNAs represent a distinct class of small RNAs. siRNAs and miRNAs are both processed from dsRNA-precursors by the dsRNase DCR-1. We investigated how RNAi and the miRNA pathway are mechanistically separated. We showed that precursors of small RNAs contain structural features that direct the small RNAs into the RNAi or the miRNA pathway. Small RNAs expressed from hairpin precursors with a fully matching stem are recognized as siRNAs and bound by RDE-1. A one- to three-nucleotide mismatch at various positions in the stem of the precursor directs the small RNAs into the miRNA pathway, as these small RNAs are in majority bound to ALG-1. The Argonaute proteins to which the small RNAs are bound determine the silencing mode, and no functional overlap between RDE-1 and ALG-1 was detected. We also…

Subjects/Keywords: Biologie; RNA interference; RNAi; miRNA; Argonaute; RdRP; Caenorhabditis elegans; RDE-1; ALG-1; zebrafish

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APA (6^th Edition):

Steiner, F. A. (2007). Small RNAs and Argonaute proteins: key players in post-transcriptional gene silencing. (Doctoral Dissertation). Universiteit Utrecht. Retrieved from http://dspace.library.uu.nl:8080/handle/1874/23784

Chicago Manual of Style (16^th Edition):

Steiner, F A. “Small RNAs and Argonaute proteins: key players in post-transcriptional gene silencing.” 2007. Doctoral Dissertation, Universiteit Utrecht. Accessed February 28, 2021. http://dspace.library.uu.nl:8080/handle/1874/23784.

MLA Handbook (7^th Edition):

Steiner, F A. “Small RNAs and Argonaute proteins: key players in post-transcriptional gene silencing.” 2007. Web. 28 Feb 2021.

Vancouver:

Steiner FA. Small RNAs and Argonaute proteins: key players in post-transcriptional gene silencing. [Internet] [Doctoral dissertation]. Universiteit Utrecht; 2007. [cited 2021 Feb 28]. Available from: http://dspace.library.uu.nl:8080/handle/1874/23784.

Council of Science Editors:

Steiner FA. Small RNAs and Argonaute proteins: key players in post-transcriptional gene silencing. [Doctoral Dissertation]. Universiteit Utrecht; 2007. Available from: http://dspace.library.uu.nl:8080/handle/1874/23784

University of Washington

10. Washington, Malik Rashad. Radial Injector Mixing Effects on Detonation Zone Position in Rotating Detonation Engine.

Degree: 2019, University of Washington

URL: http://hdl.handle.net/1773/43625

► Radial propellant injection in the annular combustion chamber of a rotating detonation engine (RDE), done in a manner to promote maximum size scale of vortices,… (more)

Subjects/Keywords: CFD; Detonation Zone; Mixing; RDE; Rotating Detonation Engine; UWRDE; Aerospace engineering; Engineering; Aeronautics and astronautics

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APA (6^th Edition):

Washington, M. R. (2019). Radial Injector Mixing Effects on Detonation Zone Position in Rotating Detonation Engine. (Thesis). University of Washington. Retrieved from http://hdl.handle.net/1773/43625

Note: this citation may be lacking information needed for this citation format:
Not specified: Masters Thesis or Doctoral Dissertation

Chicago Manual of Style (16^th Edition):

Washington, Malik Rashad. “Radial Injector Mixing Effects on Detonation Zone Position in Rotating Detonation Engine.” 2019. Thesis, University of Washington. Accessed February 28, 2021. http://hdl.handle.net/1773/43625.

Note: this citation may be lacking information needed for this citation format:
Not specified: Masters Thesis or Doctoral Dissertation

MLA Handbook (7^th Edition):

Washington, Malik Rashad. “Radial Injector Mixing Effects on Detonation Zone Position in Rotating Detonation Engine.” 2019. Web. 28 Feb 2021.

Vancouver:

Washington MR. Radial Injector Mixing Effects on Detonation Zone Position in Rotating Detonation Engine. [Internet] [Thesis]. University of Washington; 2019. [cited 2021 Feb 28]. Available from: http://hdl.handle.net/1773/43625.

Note: this citation may be lacking information needed for this citation format:
Not specified: Masters Thesis or Doctoral Dissertation

Council of Science Editors:

Washington MR. Radial Injector Mixing Effects on Detonation Zone Position in Rotating Detonation Engine. [Thesis]. University of Washington; 2019. Available from: http://hdl.handle.net/1773/43625

Note: this citation may be lacking information needed for this citation format:
Not specified: Masters Thesis or Doctoral Dissertation

11. Yang, Huan. Characterization of three novel RNAi machinery components in C. elegans.

Degree: PhD, Molecular & Integrative Physiology, 2013, University of Kansas

URL: http://hdl.handle.net/1808/12269

► RNA interference (RNAi) is a homology-based and antisense small RNA-dependent gene silencing mechanism found in most eukaryotes. This dissertation describes identification and characterization of three… (more)

Subjects/Keywords: Molecular biology; Genetics; Physiology; C. elegans; Rde-10; Rde-11; Rde-12; Rnai; Secondary sirna

…transgene silencing. �� …. �� 67 Figure 3.2. RDE-12 localized in… …cytoplasmic foci in soma and P granules in germline. …..68 Figure 3.3. RDE-12 associates with mRNA… …targeted by RNAi. �� …69 Figure 3.4. RDE-12 is required for secondary siRNA synthesis… …x28;Zhang et al. 2004; MacRae et al. 2007). In flies, R2D2 (the homolog of RDE-4… …2009; Conine et al. 2010; Vasale et al. 2010) . The C. elegans RDE-1 (RDE: RNAi…

10 more images…

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APA (6^th Edition):

Yang, H. (2013). Characterization of three novel RNAi machinery components in C. elegans. (Doctoral Dissertation). University of Kansas. Retrieved from http://hdl.handle.net/1808/12269

Chicago Manual of Style (16^th Edition):

Yang, Huan. “Characterization of three novel RNAi machinery components in C. elegans.” 2013. Doctoral Dissertation, University of Kansas. Accessed February 28, 2021. http://hdl.handle.net/1808/12269.

MLA Handbook (7^th Edition):

Yang, Huan. “Characterization of three novel RNAi machinery components in C. elegans.” 2013. Web. 28 Feb 2021.

Vancouver:

Yang H. Characterization of three novel RNAi machinery components in C. elegans. [Internet] [Doctoral dissertation]. University of Kansas; 2013. [cited 2021 Feb 28]. Available from: http://hdl.handle.net/1808/12269.

Council of Science Editors:

Yang H. Characterization of three novel RNAi machinery components in C. elegans. [Doctoral Dissertation]. University of Kansas; 2013. Available from: http://hdl.handle.net/1808/12269

Universiteit Utrecht

12. Tops, B.B.J. The biogenesis and function of small RNAs in C. elegans.

Degree: 2007, Universiteit Utrecht

URL: http://dspace.library.uu.nl:8080/handle/1874/19062

► RNAi is the process by which double-stranded RNA (dsRNA) induces sequence-specific mRNA degradation. DsRNA is diced into small interfering RNAs (siRNAs) of ~21-23 nt by… (more)

▼ RNAi is the process by which double-stranded RNA (dsRNA) induces sequence-specific mRNA degradation. DsRNA is diced into small interfering RNAs (siRNAs) of ~21-23 nt by a complex containing the RNaseIII enzyme DICER. The mature siRNAs are subsequently bound by Argonaute proteins and incorporated into an RNA-induced silencing complex (RISC), which cleaves homologous mRNAs. This process is involved in viral resistance and transposon silencing. Here we describe the identification of two proteins involved in the siRNA pathway; RRF-2 and RDE-2. The first is an RNA-directed RNA polymerase, the latter is a Caenorhabditae-specific protein, binding to MUT-7. Both RRF-2 and RDE-2 are required for an efficient RNAi response in C. elegans. A process closely related to the RNAi pathway is the microRNA (miRNA) pathway. MiRNAs are transcribed from the genome as long transcripts that can snap-back on themselves (primary miRNA or pri-miRNA) and are processed into ~70 nt stem-loop structures (precursor miRNA or pre-miRNA) by Drosha in the nucleus (Lee et al. 2003). The pre-miRNA serves as a template for Dicer which processes the pre-miRNA into the double-stranded miRNA of ~21 nt. These miRNAs are, like siRNAs, bound by Argonaute proteins and can bind to mRNAs (usually to the 3' UTR), but unlike siRNA that degrade mRNAs, miRNAs primarily inhibit translation. MiRNAs play a role in developmental timing, stress responses and fine-tuning gene-regulation. Here we describe the identification of Pasha (partner of Drosha) in Drosophila and C. elegans. Pasha is an essential protein, that associates with Drosha in the nucleus and is required for processing of pri-miRNAs into pre-miRNAs. We also discuss the role of the two Argonaute proteins, ALG-1 and ALG-2, that function in the miRNA pathway in C. elegans and present data supporting specialized roles for these Argonautes in this pathway. We show that a cluster of miRNAs, mir-35-41, regulates sex-determination in C. elegans. These miRNAs re-enforce decisions at several levels in the sex-determination pathway, that result in hermaphrodite-specific development. One of the targets of mir-35-41 is the fem-2 gene. Finally we discuss the pros and cons of the methods currently used to predict/verify miRNA targets, illustrated by a C. elegans example.

Subjects/Keywords: Geneeskunde; RNAi; miRNA; siRNA; rde-2; rrf-2; pasha; sex-determination; fem-2; dosage compensation; C. elegans

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APA · Chicago · MLA · Vancouver · CSE | Export to Zotero / EndNote / Reference Manager

APA (6^th Edition):

Tops, B. B. J. (2007). The biogenesis and function of small RNAs in C. elegans. (Doctoral Dissertation). Universiteit Utrecht. Retrieved from http://dspace.library.uu.nl:8080/handle/1874/19062

Chicago Manual of Style (16^th Edition):

Tops, B B J. “The biogenesis and function of small RNAs in C. elegans.” 2007. Doctoral Dissertation, Universiteit Utrecht. Accessed February 28, 2021. http://dspace.library.uu.nl:8080/handle/1874/19062.

MLA Handbook (7^th Edition):

Tops, B B J. “The biogenesis and function of small RNAs in C. elegans.” 2007. Web. 28 Feb 2021.

Vancouver:

Tops BBJ. The biogenesis and function of small RNAs in C. elegans. [Internet] [Doctoral dissertation]. Universiteit Utrecht; 2007. [cited 2021 Feb 28]. Available from: http://dspace.library.uu.nl:8080/handle/1874/19062.

Council of Science Editors:

Tops BBJ. The biogenesis and function of small RNAs in C. elegans. [Doctoral Dissertation]. Universiteit Utrecht; 2007. Available from: http://dspace.library.uu.nl:8080/handle/1874/19062

Universitat Politècnica de València

13. Gómez Gil, Javier. Development of an altitude simulator and analysis of the performance and emissions of turbocharged Diesel engines at different altitudes .

Degree: 2018, Universitat Politècnica de València

URL: http://hdl.handle.net/10251/101284

► En el pasado, la investigación de los motores de combustión interna se ha centrado en la reducción del combustible y las emisiones, manteniendo constante el… (more)

▼ En el pasado, la investigación de los motores de combustión interna se ha centrado en la reducción del combustible y las emisiones, manteniendo constante el rendimiento. Además, en los últimos años la presión está aumentando aún más para los fabricantes de motores. La nueva homologación es un gran desafío, principalmente debido a la introducción de los ciclos de emisiones de conducción reales (RDE), lo que obligará a homologar los coches en condiciones reales de conducción, más dinámicas y con un amplio rango de condiciones ambientales, donde la altitud ambiente puede llevar a los 1300 metros sobre el nivel del mar. Hoy en día, los fabricantes tienen diferentes formas de ensayar los motores y los automóviles en condiciones de altitud. Pruebas en altitud real, donde el automóvil, los ingenieros y los sistemas de medida y ensayo deben desplazarse a un lugar en altitud durante largos períodos de tiempo. La otra solución es ensayar el automóvil en una cámara hipobárica, donde se puede controlar la presión. Sin embargo, estas cámaras son costosas, difíciles de operar e intensivas en espacio y recursos. En la presente tesis, se desarrolla un simulador de altitud, que presentará otra alternativa para el ensayo de motores en altitud. En este simulador de altitud, el motor está a presión ambiente y solo sus conductos de admisión y escape están a la altitud del ensayo. En la tesis, se describe el principio de operación del simulador de altitud, sus diferentes elementos y su efecto sobre el rendimiento del simulador de altitud, así como las estrategias de control aplicadas para controlar las diferentes variables y elementos. Para estudiar el potencial del simulador de altitud, un motor diésel turboalimentado se ha ensayado a diferentes altitudes y su rendimiento y emisiones se han comparado con los obtenidos en una cámara hipobárica. Además, el motor se ha ensayado a diferentes altitudes en ciclos dinámicos y se ha analizado su rendimiento y emisiones, cuyos resultados muestran que la estrategia de control del motor cuando está operando en altitud se centra en la protección de los diferentes elementos sin tener en cuenta las emisiones. Por estas razones, es importante estudiar diferentes estrategias para reducir las emisiones de los motores en altitud. Finalmente, se han realizado diferentes estudios paramétricos cambiando la geometría de las válvulas del motor y colector de escape para analizar su efecto sobre la temperatura de entrada de los sistemas de postratamiendo y el consumo especifico de combustible, como una forma de reducir el tiempo que tardan dichos sistemas en alcanzar la temperatura objetivo con mayor eficiencia de trabajo.; In the last decades, the internal combustion engines research has been focused in the reduction of the fuel consumption and emissions while keeping constant the performance. Besides, in the last years the pressure is increasing even more to the engine manufacturers. The new homologation is a big challenge, mainly because of the introduction of the real driving emissions cycles, which will… Advisors/Committee Members: Serrano Cruz, José Ramón (advisor).

Subjects/Keywords: altitud; motor; motores; diesel; gasolina; combustión; simulador; presión; admisión; escape; emisiones; RDE; WLTC; WLTP; Euro; contaminación; NOx; PM; optimización; hipobárica; altimétrica

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APA (6^th Edition):

Gómez Gil, J. (2018). Development of an altitude simulator and analysis of the performance and emissions of turbocharged Diesel engines at different altitudes . (Doctoral Dissertation). Universitat Politècnica de València. Retrieved from http://hdl.handle.net/10251/101284

Chicago Manual of Style (16^th Edition):

Gómez Gil, Javier. “Development of an altitude simulator and analysis of the performance and emissions of turbocharged Diesel engines at different altitudes .” 2018. Doctoral Dissertation, Universitat Politècnica de València. Accessed February 28, 2021. http://hdl.handle.net/10251/101284.

MLA Handbook (7^th Edition):

Gómez Gil, Javier. “Development of an altitude simulator and analysis of the performance and emissions of turbocharged Diesel engines at different altitudes .” 2018. Web. 28 Feb 2021.

Vancouver:

Gómez Gil J. Development of an altitude simulator and analysis of the performance and emissions of turbocharged Diesel engines at different altitudes . [Internet] [Doctoral dissertation]. Universitat Politècnica de València; 2018. [cited 2021 Feb 28]. Available from: http://hdl.handle.net/10251/101284.

Council of Science Editors:

Gómez Gil J. Development of an altitude simulator and analysis of the performance and emissions of turbocharged Diesel engines at different altitudes . [Doctoral Dissertation]. Universitat Politècnica de València; 2018. Available from: http://hdl.handle.net/10251/101284

University of Sydney

14. Pourazadi, Ehsan. Facile Synthesis of Boron-doped Graphitic Materials for Oxygen Reduction Purpose in Fuel Cell .

Degree: 2016, University of Sydney

URL: http://hdl.handle.net/2123/16032

► Modern civilization is blamed for aggravating climate change as well as global warming by pumping millions of tonnes of greenhouse gases into the atmosphere. In… (more)

▼ Modern civilization is blamed for aggravating climate change as well as global warming by pumping millions of tonnes of greenhouse gases into the atmosphere. In addition to environmental concerns, the ever-increasing energy demand calls for new generations of power technologies to supply such a rapid rise in energy market. Fuel cells show to be placed at the cornerstone of technology development for the current century, since they could mitigate the environmental concern and meet the escalation in energy need. However, transforming to a future sustainable energy with zero to low CO2 emission needs the development of cheap fuel cells on top of a sustainable hydrogen supply. The current scientists’ and engineers’ challenge is the fabrication of cheap, durable and reliable catalyst materials for electrochemical reduction of oxygen in cathode which is a crucial factor in determining cell’s efficiency. We also looked into this area to find new cathodic materials and compared their performance against commonly mentioned materials in literature. The focus of this contribution is to compare the Oxygen Reduction Reaction (ORR) performance of widely literature cited boron-doped graphene materials with the new type of boron-doped samples known as Graphene Organic Framework (GOF). The first chapter deals with the commercialization problem by discussing cell’s internal design, classification and its operation. Subsequently, new alternative suggested substitutes such as metallic nano catalyst, metallic-graphene hybrids, polymeric and new non-metallic graphitic electrocatalysts. The chapter will continue subsequently by introducing GOF material, which are able to form the similar CBO2 structure as the previously literature cited substitutionally boron-doped graphene (BGs) formed, as a novel catalyst for ORR. The second chapter examines the material synthesis and characterization. Three samples of substitutionally boron-doped graphene, identified as BG1, BG2 and BG3, and two types of new porous GOFs materials are synthesised under various preparation strategies. In order to confirm the integration and presence of boron in synthesised samples, variety of characterization and spectroscopic analysis are performed. XRD, TGA and FTIR are exclusively applied to GOF materials since their applications to BG samples will not provide any valuable information. However Raman and XPS characterizations are executed for all samples to determine the degree of G-band shifts (i.e. the extent of doping) and corresponding surface concentration of doped boron. The third chapter provides electrochemical results of prepared materials using conventional CV and RDE techniques in electrochemistry. To complete the discussion, subsequently, the incompetency of Koutchy-Levich (K-L) method and Rotating Disk Electrode (RDE) for determining the true ORR path is explained by reviewing Koutchy-Levich (K-L) method fundamentals. Instead Rotating Ring Disk Electrode (RRDE) technique is considered to estimate the true ORR efficiency of literature materials (BGs) versus…

Subjects/Keywords: boron-doped graphene; graphene organic frameworks (GOFs); Ring Disk Electrode (RDE); Rotating Ring Disk Electrode (RRDE)

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APA (6^th Edition):

Pourazadi, E. (2016). Facile Synthesis of Boron-doped Graphitic Materials for Oxygen Reduction Purpose in Fuel Cell . (Thesis). University of Sydney. Retrieved from http://hdl.handle.net/2123/16032

Note: this citation may be lacking information needed for this citation format:
Not specified: Masters Thesis or Doctoral Dissertation

Chicago Manual of Style (16^th Edition):

Pourazadi, Ehsan. “Facile Synthesis of Boron-doped Graphitic Materials for Oxygen Reduction Purpose in Fuel Cell .” 2016. Thesis, University of Sydney. Accessed February 28, 2021. http://hdl.handle.net/2123/16032.

Note: this citation may be lacking information needed for this citation format:
Not specified: Masters Thesis or Doctoral Dissertation

MLA Handbook (7^th Edition):

Pourazadi, Ehsan. “Facile Synthesis of Boron-doped Graphitic Materials for Oxygen Reduction Purpose in Fuel Cell .” 2016. Web. 28 Feb 2021.

Vancouver:

Pourazadi E. Facile Synthesis of Boron-doped Graphitic Materials for Oxygen Reduction Purpose in Fuel Cell . [Internet] [Thesis]. University of Sydney; 2016. [cited 2021 Feb 28]. Available from: http://hdl.handle.net/2123/16032.

Note: this citation may be lacking information needed for this citation format:
Not specified: Masters Thesis or Doctoral Dissertation

Council of Science Editors:

Pourazadi E. Facile Synthesis of Boron-doped Graphitic Materials for Oxygen Reduction Purpose in Fuel Cell . [Thesis]. University of Sydney; 2016. Available from: http://hdl.handle.net/2123/16032

Note: this citation may be lacking information needed for this citation format:
Not specified: Masters Thesis or Doctoral Dissertation

Wright State University

15. North, Gary S. Metal Coupon Testing in an Axial Rotating Detonation Engine for Wear Characterization.

Degree: MSin Materials Science and Engineering MSMSE, Materials Science and Engineering, 2020, Wright State University

URL: http://rave.ohiolink.edu/etdc/view?acc_num=wright1588770787704665

► Rotating Detonation Engines (RDE) are being explored as a possible way to getbetter fuel efficiency for turbine engines than is otherwise possible. The walls of… (more)

Subjects/Keywords: Aerospace Materials; Metallurgy; Materials Science; Aerospace Engineering; RDE; Rotating Detonation Engine; Ablation; Inconel 625; 304 Stainless; microstructure

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APA (6^th Edition):

North, G. S. (2020). Metal Coupon Testing in an Axial Rotating Detonation Engine for Wear Characterization. (Masters Thesis). Wright State University. Retrieved from http://rave.ohiolink.edu/etdc/view?acc_num=wright1588770787704665

Chicago Manual of Style (16^th Edition):

North, Gary S. “Metal Coupon Testing in an Axial Rotating Detonation Engine for Wear Characterization.” 2020. Masters Thesis, Wright State University. Accessed February 28, 2021. http://rave.ohiolink.edu/etdc/view?acc_num=wright1588770787704665.

MLA Handbook (7^th Edition):

North, Gary S. “Metal Coupon Testing in an Axial Rotating Detonation Engine for Wear Characterization.” 2020. Web. 28 Feb 2021.

Vancouver:

North GS. Metal Coupon Testing in an Axial Rotating Detonation Engine for Wear Characterization. [Internet] [Masters thesis]. Wright State University; 2020. [cited 2021 Feb 28]. Available from: http://rave.ohiolink.edu/etdc/view?acc_num=wright1588770787704665.

Council of Science Editors:

North GS. Metal Coupon Testing in an Axial Rotating Detonation Engine for Wear Characterization. [Masters Thesis]. Wright State University; 2020. Available from: http://rave.ohiolink.edu/etdc/view?acc_num=wright1588770787704665

16. Ryabova, Anna. Électrocatalyse de la réduction de l'oxygène et du peroxyde d'hydrogène sur les oxydes de manganèse : Электрокатализ реакций восстановления O2 и H2O2 на оксидах марганца.

Degree: Docteur es, Chimie physique, 2018, Strasbourg; Université Lomonossov (Moscou)

URL: http://www.theses.fr/2018STRAF011

►

Les oxydes de manganèse présentent un grand intérêt en raison de leur activité catalytique pour l'ORR (la réaction de réduction de l’oxygène) en milieu alcalin… (more)

▼

Les oxydes de manganèse présentent un grand intérêt en raison de leur activité catalytique pour l'ORR (la réaction de réduction de l’oxygène) en milieu alcalin et peuvent être utilisés comme matériaux sans métaux nobles pour la cathode dans les piles à combustible. La présente thèse est consacrée à l’étude de l’activité d'oxydes de manganèse pour l’ORR. Il a été montré que Mn2O3 avec structure bixbyite a une meilleure activité catalytique vers l'ORR en milieu alcalin que les autres oxydes de manganèse étudiés. L'activité spécifique de Mn2O3 est seulement 4 fois inférieure à celle de Pt à une surtension de 0.3 V (ERH). Le lien entre la structure des oxydes de Mn et l'activité ORR est identifié: l'activité spécifique augmente exponentiellement avec le potentiel du couple redox Mn(III)/Mn(IV) de surface. Pour assurer l'activité électrocatalytique élevée de Mn2O3, il est nécessaire d'ajouter du carbone à la composition d'électrode, ainsi que de garder un potentiel supérieur à 0.7 V (ERH).

Manganese oxides are of great interest due to their catalytic activity towards the ORR (the oxygen reduction reaction) in alkaline media and can be used as noble metal-free materials for the cathode in liquid and polymer electrolyte alkaline fuel cells. The present thesis is devoted to the investigation of the ORR activity of manganese oxides. It was shown that Mn2O3 with bixbyite structure has a better catalytic activity toward the ORR in alkaline media than other investigated manganese oxide, the surface activity of Mn2O3 is only 4 times lower than that of Pt at an overvoltage of 0.3 V (RHE). The link between the structure of Mn oxides and the ORR activity is found: the specific ORR activity exponentially increases with the potential of the surface Mn(III)/Mn(IV) red-ox couple. To ensure the high electrocatalytic activity of Mn2O3, it is necessary to add carbon to the electrode composition, as well as to keep potential above 0.7 V (RHE).

Advisors/Committee Members: Savinova, Elena R. (thesis director), Tsirlina, Galina (thesis director).

Subjects/Keywords: Réaction de réduction d’oxygène (ORR); Électrode à disque tournant (RDE); Électrode tournante à disque-anneau (RRDE; Cinétique de l’ORR; Électrolyte alcalin; Manganese oxides; Carbon; Oxygen reduction reaction (ORR); Electrocatalysis; Rotating disk electrode (RDE); Rotating ring-disk electrode (RRDE); ORR kinetics; Alkaline electrolyte; 547.1

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APA (6^th Edition):

Ryabova, A. (2018). Électrocatalyse de la réduction de l'oxygène et du peroxyde d'hydrogène sur les oxydes de manganèse : Электрокатализ реакций восстановления O2 и H2O2 на оксидах марганца. (Doctoral Dissertation). Strasbourg; Université Lomonossov (Moscou). Retrieved from http://www.theses.fr/2018STRAF011

Chicago Manual of Style (16^th Edition):

Ryabova, Anna. “Électrocatalyse de la réduction de l'oxygène et du peroxyde d'hydrogène sur les oxydes de manganèse : Электрокатализ реакций восстановления O2 и H2O2 на оксидах марганца.” 2018. Doctoral Dissertation, Strasbourg; Université Lomonossov (Moscou). Accessed February 28, 2021. http://www.theses.fr/2018STRAF011.

MLA Handbook (7^th Edition):

Ryabova, Anna. “Électrocatalyse de la réduction de l'oxygène et du peroxyde d'hydrogène sur les oxydes de manganèse : Электрокатализ реакций восстановления O2 и H2O2 на оксидах марганца.” 2018. Web. 28 Feb 2021.

Vancouver:

Ryabova A. Électrocatalyse de la réduction de l'oxygène et du peroxyde d'hydrogène sur les oxydes de manganèse : Электрокатализ реакций восстановления O2 и H2O2 на оксидах марганца. [Internet] [Doctoral dissertation]. Strasbourg; Université Lomonossov (Moscou); 2018. [cited 2021 Feb 28]. Available from: http://www.theses.fr/2018STRAF011.

Council of Science Editors:

Ryabova A. Électrocatalyse de la réduction de l'oxygène et du peroxyde d'hydrogène sur les oxydes de manganèse : Электрокатализ реакций восстановления O2 и H2O2 на оксидах марганца. [Doctoral Dissertation]. Strasbourg; Université Lomonossov (Moscou); 2018. Available from: http://www.theses.fr/2018STRAF011

Universidade Federal do Maranhão

17. ALIELSON CORRÊA BOTELHO. ESTUDO DA REAÇÃO DE REDUÇÃO DE OXIGÊNIO SOBRE ELETRODOS À BASE DE TETRAMETÓXIFENILPORFIRINAS PARA APLICAÇÕES EM CÉLULAS A COMBUSTÍVEL DE BOROIDRETO DIRETO.

Degree: 2012, Universidade Federal do Maranhão

URL: http://www.tedebc.ufma.br//tde_busca/arquivo.php?codArquivo=755

►

The oxygen reduction reaction (ORR) in 1.0 mol/L KOH solutions catalyzed by FeTMPP/C and CoTMPP/C was investigated in absence and presence of BH4- anions with… (more)

▼

The oxygen reduction reaction (ORR) in 1.0 mol/L KOH solutions catalyzed by FeTMPP/C and CoTMPP/C was investigated in absence and presence of BH4- anions with concentrations varying from 10-7 to 1.0 mol/L. Similar cyclic voltammetry and rotating disk electrode experiments have been also performed the commercial E-TEK Pt/C electrocatalysts. In absence of BH4- anions, the ORR proceeds via a direct 4 electron pathway on FeTMPP/C and Pt/C and via a peroxide pathway involving (2-electron process) on CoTMPP/C and Au/C catalysts. In addition, Pt/C presented the most positive onset potential for the reaction. In presence of BH4- anions, a drastic loss in the catalytic activity of the Pt/C electrode was observed, even for concentrations as low as 10-7 mol/L. The effect of temperature on the ORR was studied and from 20C up to 60C the diffusion limited current densities remained nearly constants. At 80C, a decrease in the current of density was observed, probably due to a decrease in the oxygen concentration and viscosity of the solution. Arrhenius plots [ln (k) vs. T-1] were used to evaluate the activations energy (Ea) of the ORR in absence of borohydride and resulted in 47.6 kJ/mol and 50.3 kJ/mol for Pt/C and FeTMPP/C, respectively. In presence of borohydride in solution, the Ea value for Pt/C showed a pronounced decrease to 38.7 kJ/mol, due to borohydride oxidation as a parallel reaction, while for FeTMPP/C the value calculate was 52.7 kJ/mol, i.e., remained practically constant. Such results indicates that FeTMPP is an efficient catalyst for ORR in alkaline solutions and tolerant to BH4 anions.

A reação de redução de oxigênio (RRO) em solução KOH 1,0 mol/L catalisada por FeTMPP/C e CoTMPP/C foi investigada na ausência e presença de anions BH4- com concentrações variando de 10-7 a 1 mol/L. Experimentos similares com voltametria cíclica e eletrodo disco-anel e disco rotatório foram feitos em eletrocatalisadores Pt/C comercial da E-TEK e Au/C. Na ausência de BH4-, a RRO se processa via mecanismo 4 elétrons para eletrodos FeTMPP/C e Pt/C e via peróxido, ou seja, 2 elétrons sobre eletrodos CoTMPP/C e Au/C. Diante disto, o eletrodo Pt/C apresenta melhor potencial para a reação. Na presença de anions BH4-, foi observada uma drástica perda na atividade catalítica do eletrodo Pt/C até mesmo em baixas concentrações (10-7 mol/L). O efeito da temperatura sobre a RRO foi estudado na faixa de 20C a 60C manteve-se constante em relação às densidades de corrente. A 80C foi observada uma diminuição na densidade de corrente, muito provavelmente, devido à diminuição na concentração de oxigênio e a viscosidade da solução. Foi usada a relação de Arrhenius (ln K vs. T-1) para o calculo da energia de ativação da RRO na ausência de boroidreto resultando em 47.6 kJ/mol e 50.3 kJ/mol para Pt/C e FeTMPP/C, respectivamente. Na presença de boroidreto em solução, a energia de ativação da Pt/C mostrou uma diminuição considerável, devido a reação de oxidação dos anions BH4- acorrer paralelamente, enquanto que para o eletrodo FeTMPP/C aumentou para 52.7…

Advisors/Committee Members: Auro Atsushi Tanaka, CICERO WELLINGTON BRITO BEZERRA.

Subjects/Keywords: Redução de oxigênio; Eletrocatalisadores; Oxidação de boroidreto; Medidas de eletrodo de disco rotatório; QUIMICA ANALITICA; Oxygen reduction; Electrocatalysts; Borohydride oxidation; RDE measurements

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APA · Chicago · MLA · Vancouver · CSE | Export to Zotero / EndNote / Reference Manager

APA (6^th Edition):

BOTELHO, A. C. (2012). ESTUDO DA REAÇÃO DE REDUÇÃO DE OXIGÊNIO SOBRE ELETRODOS À BASE DE TETRAMETÓXIFENILPORFIRINAS PARA APLICAÇÕES EM CÉLULAS A COMBUSTÍVEL DE BOROIDRETO DIRETO. (Thesis). Universidade Federal do Maranhão. Retrieved from http://www.tedebc.ufma.br//tde_busca/arquivo.php?codArquivo=755

Note: this citation may be lacking information needed for this citation format:
Not specified: Masters Thesis or Doctoral Dissertation

Chicago Manual of Style (16^th Edition):

BOTELHO, ALIELSON CORRÊA. “ESTUDO DA REAÇÃO DE REDUÇÃO DE OXIGÊNIO SOBRE ELETRODOS À BASE DE TETRAMETÓXIFENILPORFIRINAS PARA APLICAÇÕES EM CÉLULAS A COMBUSTÍVEL DE BOROIDRETO DIRETO.” 2012. Thesis, Universidade Federal do Maranhão. Accessed February 28, 2021. http://www.tedebc.ufma.br//tde_busca/arquivo.php?codArquivo=755.

Note: this citation may be lacking information needed for this citation format:
Not specified: Masters Thesis or Doctoral Dissertation

MLA Handbook (7^th Edition):

BOTELHO, ALIELSON CORRÊA. “ESTUDO DA REAÇÃO DE REDUÇÃO DE OXIGÊNIO SOBRE ELETRODOS À BASE DE TETRAMETÓXIFENILPORFIRINAS PARA APLICAÇÕES EM CÉLULAS A COMBUSTÍVEL DE BOROIDRETO DIRETO.” 2012. Web. 28 Feb 2021.

Vancouver:

BOTELHO AC. ESTUDO DA REAÇÃO DE REDUÇÃO DE OXIGÊNIO SOBRE ELETRODOS À BASE DE TETRAMETÓXIFENILPORFIRINAS PARA APLICAÇÕES EM CÉLULAS A COMBUSTÍVEL DE BOROIDRETO DIRETO. [Internet] [Thesis]. Universidade Federal do Maranhão; 2012. [cited 2021 Feb 28]. Available from: http://www.tedebc.ufma.br//tde_busca/arquivo.php?codArquivo=755.

Note: this citation may be lacking information needed for this citation format:
Not specified: Masters Thesis or Doctoral Dissertation

Council of Science Editors:

BOTELHO AC. ESTUDO DA REAÇÃO DE REDUÇÃO DE OXIGÊNIO SOBRE ELETRODOS À BASE DE TETRAMETÓXIFENILPORFIRINAS PARA APLICAÇÕES EM CÉLULAS A COMBUSTÍVEL DE BOROIDRETO DIRETO. [Thesis]. Universidade Federal do Maranhão; 2012. Available from: http://www.tedebc.ufma.br//tde_busca/arquivo.php?codArquivo=755

Note: this citation may be lacking information needed for this citation format:
Not specified: Masters Thesis or Doctoral Dissertation

18. S. Marzorati. PT-FREE NANO- AND MICRO-STRUCTURED CARBONS FOR ELECTROCHEMICAL OXYGEN REDUCTION REACTION.

Degree: 2015, Università degli Studi di Milano

URL: http://hdl.handle.net/2434/332529

► Oxygen reduction reaction (ORR) catalysts are of crucial importance in developing low- and medium-temperature fuel cells, as PEMFCs (Polymer Electrolyte Membrane Fuel Cells), from which… (more)

▼ Oxygen reduction reaction (ORR) catalysts are of crucial importance in developing low- and medium-temperature fuel cells, as PEMFCs (Polymer Electrolyte Membrane Fuel Cells), from which sizeable energy saving and reduction of greenhouse gas emission are expected in comparison with the use of coal and oil based fuels in thermal engines. The same electrochemical oxygen reduction reaction takes place in oxygen depolarized cathodes (ODC) in chlor-alkali electrolysis, replacing the conventional hydrogen evolving cathode, gaining about 30% energy consumption reduction in the overall process. At present carbon-supported Pt and Pt-rich alloys are best credited to the ORR purpose. However, Pt-based catalysts are not free from certain drawbacks, such as oxide formation and Pt particle coarsening through Ostwald ripening, that decrease the overall cell energy conversion efficiency. Furthermore, attendant problems concerning natural availability, geographic distribution and cost of platinum, render platinum supply strategic and fuel cells hardly scalable to mass production. At present, projections on platinum usage for PEMFCs are estimated at ~15 ton y-1 in addition to the current ones, at a cost of ~40 $ g-1. Therefore, non-precious metal catalysts are actively searched for, such as to meet already established operational benchmarks for conventional platinum PEMFC vehicular requirements (0.5 W cm-2; 5500 h durability) with the additional target of significant cost reduction. Several papers on non-precious ORR catalysts have been published after a first report by Jasinski in 1964 demonstrating the ORR activity of metal substitutes-phthalocyanines. Then, research on metal-nitrogen macrocycles significantly expanded, leading to the picture that ORR catalytic activity can be related to N4-Me and N2-Me moieties. However, for precursors cost and unsatisfactory lifetime performance, research was steered toward more simple nitrogen-containing reactants and preparation procedures. Significant steps in this direction were obtained by Dodelet et al. who demonstrated that ORR overpotentials almost linearly decrease with increasing nitrogen content in carbon. Positive results were obtained on a series of samples prepared by high temperature treatment of carbon precursors in NH3/H2/N2 mixtures; doping of these modified carbons with iron rather than cobalt salts was shown to be preferable for better efficiency in oxygen reduction, even though still lower than that of platinum. Further improvements both in terms of incipient ORR potentials and currents were obtained by Maruyama et al. using carbons from hemoglobin and adenine-glucose pyrolysis in the presence of added Fe(II) and Cu(II)/Fe(II) mixtures, respectively. The ORR promoting role of nitrogen in carbon was independently demonstrated both theoretically and experimentally. Indeed, it was found that substitutional nitrogen at a few, specific, peripheral positions of graphene layers in well-ordered carbon nanostructures is in itself able to promote ORR activity even in the absence of… Advisors/Committee Members: tutor: M. Longhi, co-tutor: L. Formaro, coordinator: E. Licandro, LONGHI, MARIANGELA, LICANDRO, EMANUELA.

Subjects/Keywords: Oxygen Reduction Reaction; Pt-free catalysts; Mesoporous Carbons; Nanostructures; N-doping; Carbon Nanotubes; Carbon Nanocubes; Carbon Microspheres; RDE and RRDE; Ultraspray Pyrolysis Method; Charge Transfer; Settore CHIM/02 - Chimica Fisica

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APA · Chicago · MLA · Vancouver · CSE | Export to Zotero / EndNote / Reference Manager

APA (6^th Edition):

Marzorati, S. (2015). PT-FREE NANO- AND MICRO-STRUCTURED CARBONS FOR ELECTROCHEMICAL OXYGEN REDUCTION REACTION. (Thesis). Università degli Studi di Milano. Retrieved from http://hdl.handle.net/2434/332529

Note: this citation may be lacking information needed for this citation format:
Not specified: Masters Thesis or Doctoral Dissertation

Chicago Manual of Style (16^th Edition):

Marzorati, S.. “PT-FREE NANO- AND MICRO-STRUCTURED CARBONS FOR ELECTROCHEMICAL OXYGEN REDUCTION REACTION.” 2015. Thesis, Università degli Studi di Milano. Accessed February 28, 2021. http://hdl.handle.net/2434/332529.

Note: this citation may be lacking information needed for this citation format:
Not specified: Masters Thesis or Doctoral Dissertation

MLA Handbook (7^th Edition):

Marzorati, S.. “PT-FREE NANO- AND MICRO-STRUCTURED CARBONS FOR ELECTROCHEMICAL OXYGEN REDUCTION REACTION.” 2015. Web. 28 Feb 2021.

Vancouver:

Marzorati S. PT-FREE NANO- AND MICRO-STRUCTURED CARBONS FOR ELECTROCHEMICAL OXYGEN REDUCTION REACTION. [Internet] [Thesis]. Università degli Studi di Milano; 2015. [cited 2021 Feb 28]. Available from: http://hdl.handle.net/2434/332529.

Note: this citation may be lacking information needed for this citation format:
Not specified: Masters Thesis or Doctoral Dissertation

Council of Science Editors:

Marzorati S. PT-FREE NANO- AND MICRO-STRUCTURED CARBONS FOR ELECTROCHEMICAL OXYGEN REDUCTION REACTION. [Thesis]. Università degli Studi di Milano; 2015. Available from: http://hdl.handle.net/2434/332529

Note: this citation may be lacking information needed for this citation format:
Not specified: Masters Thesis or Doctoral Dissertation

19. Di Lemma, F.G. Characterisation of Aerosols from Simulated Radiological Dispersion Events.

Degree: 2015, Sierke Verlag

URL: http://resolver.tudelft.nl/uuid:5e7b2b89-a709-4d00-acfe-ccfbe6da46b8 ; urn:NBN:nl:ui:24-uuid:5e7b2b89-a709-4d00-acfe-ccfbe6da46b8 ; urn:NBN:nl:ui:24-uuid:5e7b2b89-a709-4d00-acfe-ccfbe6da46b8 ; http://resolver.tudelft.nl/uuid:5e7b2b89-a709-4d00-acfe-ccfbe6da46b8

► The research described in this thesis aims at improving the evaluation of the radiaoctive aerosol release from different Radiological Dispersion Events (RDE's), such as accidents… (more)

Subjects/Keywords: Radioactive Aerosol; Particles Characterisation; Severe Accidents; Dirty bombs; RDE; Source term evaluation

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APA · Chicago · MLA · Vancouver · CSE | Export to Zotero / EndNote / Reference Manager

APA (6^th Edition):

Di Lemma, F. G. (2015). Characterisation of Aerosols from Simulated Radiological Dispersion Events. (Doctoral Dissertation). Sierke Verlag. Retrieved from http://resolver.tudelft.nl/uuid:5e7b2b89-a709-4d00-acfe-ccfbe6da46b8 ; urn:NBN:nl:ui:24-uuid:5e7b2b89-a709-4d00-acfe-ccfbe6da46b8 ; urn:NBN:nl:ui:24-uuid:5e7b2b89-a709-4d00-acfe-ccfbe6da46b8 ; http://resolver.tudelft.nl/uuid:5e7b2b89-a709-4d00-acfe-ccfbe6da46b8

Chicago Manual of Style (16^th Edition):

Di Lemma, F G. “Characterisation of Aerosols from Simulated Radiological Dispersion Events.” 2015. Doctoral Dissertation, Sierke Verlag. Accessed February 28, 2021. http://resolver.tudelft.nl/uuid:5e7b2b89-a709-4d00-acfe-ccfbe6da46b8 ; urn:NBN:nl:ui:24-uuid:5e7b2b89-a709-4d00-acfe-ccfbe6da46b8 ; urn:NBN:nl:ui:24-uuid:5e7b2b89-a709-4d00-acfe-ccfbe6da46b8 ; http://resolver.tudelft.nl/uuid:5e7b2b89-a709-4d00-acfe-ccfbe6da46b8.

MLA Handbook (7^th Edition):

Di Lemma, F G. “Characterisation of Aerosols from Simulated Radiological Dispersion Events.” 2015. Web. 28 Feb 2021.

Vancouver:

Di Lemma FG. Characterisation of Aerosols from Simulated Radiological Dispersion Events. [Internet] [Doctoral dissertation]. Sierke Verlag; 2015. [cited 2021 Feb 28]. Available from: http://resolver.tudelft.nl/uuid:5e7b2b89-a709-4d00-acfe-ccfbe6da46b8 ; urn:NBN:nl:ui:24-uuid:5e7b2b89-a709-4d00-acfe-ccfbe6da46b8 ; urn:NBN:nl:ui:24-uuid:5e7b2b89-a709-4d00-acfe-ccfbe6da46b8 ; http://resolver.tudelft.nl/uuid:5e7b2b89-a709-4d00-acfe-ccfbe6da46b8.

Council of Science Editors:

Di Lemma FG. Characterisation of Aerosols from Simulated Radiological Dispersion Events. [Doctoral Dissertation]. Sierke Verlag; 2015. Available from: http://resolver.tudelft.nl/uuid:5e7b2b89-a709-4d00-acfe-ccfbe6da46b8 ; urn:NBN:nl:ui:24-uuid:5e7b2b89-a709-4d00-acfe-ccfbe6da46b8 ; urn:NBN:nl:ui:24-uuid:5e7b2b89-a709-4d00-acfe-ccfbe6da46b8 ; http://resolver.tudelft.nl/uuid:5e7b2b89-a709-4d00-acfe-ccfbe6da46b8

University of South Carolina

20. Roy, Rahul Dev. Copper Chloride Electrolyzer For the Production of Hydrogen Via the Copper-Chlorine Thermochemical Cycle.

Degree: MS, Chemical Engineering, 2010, University of South Carolina

URL: https://scholarcommons.sc.edu/etd/594

► Hydrogen is considered a key element in solving the upcoming energy crisis, it is not the primary fuel source but an 'energy carrier' similar… (more)

Subjects/Keywords: Chemical Engineering; Engineering; Catalyst; Copper Chlorine; Electrolyzer; Hydrogen; RDE; Thermochemical Cycle

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APA · Chicago · MLA · Vancouver · CSE | Export to Zotero / EndNote / Reference Manager

APA (6^th Edition):

Roy, R. D. (2010). Copper Chloride Electrolyzer For the Production of Hydrogen Via the Copper-Chlorine Thermochemical Cycle. (Masters Thesis). University of South Carolina. Retrieved from https://scholarcommons.sc.edu/etd/594

Chicago Manual of Style (16^th Edition):

Roy, Rahul Dev. “Copper Chloride Electrolyzer For the Production of Hydrogen Via the Copper-Chlorine Thermochemical Cycle.” 2010. Masters Thesis, University of South Carolina. Accessed February 28, 2021. https://scholarcommons.sc.edu/etd/594.

MLA Handbook (7^th Edition):

Roy, Rahul Dev. “Copper Chloride Electrolyzer For the Production of Hydrogen Via the Copper-Chlorine Thermochemical Cycle.” 2010. Web. 28 Feb 2021.

Vancouver:

Roy RD. Copper Chloride Electrolyzer For the Production of Hydrogen Via the Copper-Chlorine Thermochemical Cycle. [Internet] [Masters thesis]. University of South Carolina; 2010. [cited 2021 Feb 28]. Available from: https://scholarcommons.sc.edu/etd/594.

Council of Science Editors:

Roy RD. Copper Chloride Electrolyzer For the Production of Hydrogen Via the Copper-Chlorine Thermochemical Cycle. [Masters Thesis]. University of South Carolina; 2010. Available from: https://scholarcommons.sc.edu/etd/594

21. Stoddard, William A. Use of Computational Fluid Dynamics in Conjunction with Experimental Methods to Improve Designs of Detonation-Based Combustors.

Degree: PhD, Engineering and Applied Science: Aerospace Engineering, 2018, University of Cincinnati

URL: http://rave.ohiolink.edu/etdc/view?acc_num=ucin1543921268222073

► PDE's (Pulse Detonation Engines) and RDE's (Rotating Detonation Engines) utilize a shock coupled burning wave to combust fuel and oxidizer or air at a near… (more)

▼ PDE's (Pulse Detonation Engines) and RDE's (Rotating Detonation Engines) utilize a shock coupled burning wave to combust fuel and oxidizer or air at a near constant volume. This results in great potential to increase engine cycle efficiency utilizing pressure gain. In PDE's, the detonation wave runs along the interior of a tube, and pressurized gas is then expelled during a purge and refill process. Another detonation wave is initiated, in quick succession, resulting in periodic pulsed combustion. The RDE, in contrast, initiates a continuous detonation process in an azimuthal direction in an annular or cylindrical chamber, nearly perpendicular to the flow of oxidizer and fuel, with the detonation wave consuming incoming mixture before expelling the compressed exhaust. Work needs to be done to efficiently utilize detonations for propulsion. There is much to be gained by testing a variety of geometries to reduce pressure losses, and to aid in quick refilling. Computational Fluid Dynamics or CFD has the ability to aid in bringing the benefits of understanding the fluid dynamics of many flow geometries with minimal hardware. CFD has the ability to compare designs with precisely controlled boundary conditions. Two computational studies and two related experimental studies demonstrate how low cost simulations can effectively direct and inform experimental designs.First, a pulse detonation engine model in CFD is used in various configurations, targeting the most effective way to self-aspirate a PDE. It attempts to direct design so that a PDE quickly self-purges, allowing for higher frequency use of the PDE. This is useful to a PDE system, as the thrust to weight ratio is highly influenced by pulse frequency. The best design, utilizing an aerovalve and ejector is tested and refined in an experimental study, with tests at off-optimal conditions to demonstrate the same trends as seen in the simulation set. [Portion of Abstract Removed to Comply with Federal Order] Advisors/Committee Members: Gutmark, Ephraim (Committee Chair).

Subjects/Keywords: Aerospace Materials; Detonation; PDE; RDE; CFD; Experimental; Combustor

…Schematic of three-dimensional RDE showing detonation wave. (Schwer and Kailasanath, 2012… …Navier Stokes RDE Rotating Detonation Engine S entropy s second (as a unit)… …entropy (as a variable) SUIPR Scaled Up Interchangeable Part RDE T temperature T… …least in part, for the PDE cycle. 1.5 RDE Concept The rotating detonation engine (RDE… …Figure 1.16 Schematic of three-dimensional RDE showing detonation wave. (Schwer and…

10 more images…

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APA · Chicago · MLA · Vancouver · CSE | Export to Zotero / EndNote / Reference Manager

APA (6^th Edition):

Stoddard, W. A. (2018). Use of Computational Fluid Dynamics in Conjunction with Experimental Methods to Improve Designs of Detonation-Based Combustors. (Doctoral Dissertation). University of Cincinnati. Retrieved from http://rave.ohiolink.edu/etdc/view?acc_num=ucin1543921268222073

Chicago Manual of Style (16^th Edition):

Stoddard, William A. “Use of Computational Fluid Dynamics in Conjunction with Experimental Methods to Improve Designs of Detonation-Based Combustors.” 2018. Doctoral Dissertation, University of Cincinnati. Accessed February 28, 2021. http://rave.ohiolink.edu/etdc/view?acc_num=ucin1543921268222073.

MLA Handbook (7^th Edition):

Stoddard, William A. “Use of Computational Fluid Dynamics in Conjunction with Experimental Methods to Improve Designs of Detonation-Based Combustors.” 2018. Web. 28 Feb 2021.

Vancouver:

Stoddard WA. Use of Computational Fluid Dynamics in Conjunction with Experimental Methods to Improve Designs of Detonation-Based Combustors. [Internet] [Doctoral dissertation]. University of Cincinnati; 2018. [cited 2021 Feb 28]. Available from: http://rave.ohiolink.edu/etdc/view?acc_num=ucin1543921268222073.

Council of Science Editors:

Stoddard WA. Use of Computational Fluid Dynamics in Conjunction with Experimental Methods to Improve Designs of Detonation-Based Combustors. [Doctoral Dissertation]. University of Cincinnati; 2018. Available from: http://rave.ohiolink.edu/etdc/view?acc_num=ucin1543921268222073

22. Steiner, F.A. Small RNAs and Argonaute proteins: key players in post-transcriptional gene silencing.

Degree: 2007, University Utrecht

URL: https://dspace.library.uu.nl/handle/1874/23784 ; URN:NBN:NL:UI:10-1874-23784 ; 1874/23784 ; urn:isbn:9789078675228 ; URN:NBN:NL:UI:10-1874-23784 ; https://dspace.library.uu.nl/handle/1874/23784

► Small RNAs are important transcriptional and post-transcriptional regulators of gene expression. Many classes of small RNAs have been discovered, each carrying out specialized functions. siRNAs… (more)

▼ Small RNAs are important transcriptional and post-transcriptional regulators of gene expression. Many classes of small RNAs have been discovered, each carrying out specialized functions. siRNAs and miRNAs are best studies. siRNAs function in the process of RNAi and are thought to defend the genome against molecular parasites. They have become widely used tools in biomedical research. miRNAs are abundant and conserved; they form a class of endogenous small RNAs that fine-tunes gene expression. Most, if not all, small RNAs function through association with members of the Argonaute protein family. This thesis focuses on the function of small RNAs and Argonaute proteins in RNAi and the miRNA pathway. To understand the role of miRNAs in development, we aimed to catalogue the zebrafish miRNAs and analyze their expression. By sequencing miRNA libraries from 5-day-old zebrafish larvae and adult zebrafish brain, we found 139 known and 66 new miRNAs. We analyzed the temporal and spatial expression patterns of 67 miRNAs by whole mount in situ hybridization and northern blot analysis. Most miRNAs are expressed during later stages of development, often in a tissue specific manner. Most newly discovered miRNAs have low expression levels and are less conserved in other vertebrate species. We also analyzed the connection between the miRNAs and Argonaute proteins in C. elegans. The Argonaute proteins required for the miRNA pathway are ALG-1 and ALG-2. We used massively parallel sequencing to analyze the spectrum of small RNAs associated with ALG-1. We found that this protein almost exclusively binds to miRNAs. In addition to 84 known miRNAs, we found ten novel miRNAs. RNAi is an amplified process in C. elegans. In the amplification step, RNA-directed RNA polymerases (RdRPs) produce secondary siRNAs, which we cloned from transgenic lines expressing a single primary siRNA. We found that RdRPs perform unprimed RNA synthesis to generate secondary siRNAs, and that mRNAs which are not cleaved by the primary siRNA-Argonaute complex can be used as substrates. Secondary siRNAs are only of antisense polarity, carry 5' di- or triphosphates, and are only in the minority associated with RDE-1, the primary siRNA-binding Argonaute protein. Therefore, secondary siRNAs represent a distinct class of small RNAs. siRNAs and miRNAs are both processed from dsRNA-precursors by the dsRNase DCR-1. We investigated how RNAi and the miRNA pathway are mechanistically separated. We showed that precursors of small RNAs contain structural features that direct the small RNAs into the RNAi or the miRNA pathway. Small RNAs expressed from hairpin precursors with a fully matching stem are recognized as siRNAs and bound by RDE-1. A one- to three-nucleotide mismatch at various positions in the stem of the precursor directs the small RNAs into the miRNA pathway, as these small RNAs are in majority bound to ALG-1. The Argonaute proteins to which the small RNAs are bound determine the silencing mode, and no functional overlap between RDE-1 and ALG-1 was detected. We also…

Subjects/Keywords: RNA interference; RNAi; miRNA; Argonaute; RdRP; Caenorhabditis elegans; RDE-1; ALG-1; zebrafish

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APA · Chicago · MLA · Vancouver · CSE | Export to Zotero / EndNote / Reference Manager

APA (6^th Edition):

Steiner, F. A. (2007). Small RNAs and Argonaute proteins: key players in post-transcriptional gene silencing. (Doctoral Dissertation). University Utrecht. Retrieved from https://dspace.library.uu.nl/handle/1874/23784 ; URN:NBN:NL:UI:10-1874-23784 ; 1874/23784 ; urn:isbn:9789078675228 ; URN:NBN:NL:UI:10-1874-23784 ; https://dspace.library.uu.nl/handle/1874/23784

Chicago Manual of Style (16^th Edition):

Steiner, F A. “Small RNAs and Argonaute proteins: key players in post-transcriptional gene silencing.” 2007. Doctoral Dissertation, University Utrecht. Accessed February 28, 2021. https://dspace.library.uu.nl/handle/1874/23784 ; URN:NBN:NL:UI:10-1874-23784 ; 1874/23784 ; urn:isbn:9789078675228 ; URN:NBN:NL:UI:10-1874-23784 ; https://dspace.library.uu.nl/handle/1874/23784.

MLA Handbook (7^th Edition):

Steiner, F A. “Small RNAs and Argonaute proteins: key players in post-transcriptional gene silencing.” 2007. Web. 28 Feb 2021.

Vancouver:

Steiner FA. Small RNAs and Argonaute proteins: key players in post-transcriptional gene silencing. [Internet] [Doctoral dissertation]. University Utrecht; 2007. [cited 2021 Feb 28]. Available from: https://dspace.library.uu.nl/handle/1874/23784 ; URN:NBN:NL:UI:10-1874-23784 ; 1874/23784 ; urn:isbn:9789078675228 ; URN:NBN:NL:UI:10-1874-23784 ; https://dspace.library.uu.nl/handle/1874/23784.

Council of Science Editors:

Steiner FA. Small RNAs and Argonaute proteins: key players in post-transcriptional gene silencing. [Doctoral Dissertation]. University Utrecht; 2007. Available from: https://dspace.library.uu.nl/handle/1874/23784 ; URN:NBN:NL:UI:10-1874-23784 ; 1874/23784 ; urn:isbn:9789078675228 ; URN:NBN:NL:UI:10-1874-23784 ; https://dspace.library.uu.nl/handle/1874/23784

23. Hansmetzger, Sylvain. Etude des modes de rotation continue d'une détonation dans une chambre annulaire de section constante ou croissante : On the Continuous-Rotation Modes of Detonation in an Annular Chamber with Constant or Lineartly-Increasing Normal Section.

Degree: Docteur es, Energétique, thermique, combustion, 2018, Chasseneuil-du-Poitou, Ecole nationale supérieure de mécanique et d'aérotechnique

URL: http://www.theses.fr/2018ESMA0002

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Notre étude vise à améliorer la compréhension des modes de rotation continue d’une détonation. Elle porte sur leur caractérisation dans une chambre annulaire de section,normale… (more)

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Notre étude vise à améliorer la compréhension des modes de rotation continue d’une détonation. Elle porte sur leur caractérisation dans une chambre annulaire de section,normale à son axe de révolution, constante ou linéairement croissante. Le principe de fonctionnement repose sur l’injection continue de gaz frais devant le front de détonation pour renouveler la couche réactive et entretenir sa propagation. Ce travail trouve son application dans le développement de systèmes propulsifs utilisant la détonation rotative comme mode de combustion (Rotating Detonation Engine, RDE). Nous avons conçu et réalisé un banc expérimental dont l’élément principal est une chambre annulaire de diamètre intérieur 50 mm, de longueur 90 mm et d’épaisseur 5 ou 10 mm. Elle peut être équipée de noyaux cylindrique ou conique, de longueurs comprises entre 12 mm et 90mm et, pour les cônes, de demi-angles au sommet compris entre 0± et 14.6±. Elle est alimentée par des injections séparées de carburant, l’éthylène, et d’oxydant, formé ici par un mélange d’oxygène et d’azote. Plusieurs concentrations d’azote ont été considérées de manière à étudier plusieurs détonabilités de mélange. La caractérisation des régimes de détonation, de leurs célérités et de leurs pressions, est fondée sur l’analyse de signaux de capteurs de pression dynamiques et sur des visualisations par caméras ultrarapides. Nos résultats expérimentaux détaillent la phase d’amorçage, les modes de combustion et leur stabilité. L’étude paramétrique, réalisée pour plusieurs détonabilités, débits massiques et géométries internes de la chambre, met en évidence que, si les deux premiers paramètres n’ont pas d’effet notable sur les célérités et les pressions des modes de détonation,la géométrie interne de la chambre joue, elle, un rôle majeur dans l’amélioration de ces caractéristiques, en particulier la diminution de la longueur du noyau et l’augmentation de sa conicité (de son demi-angle au sommet). Nous avons réalisé une étude numérique afin d’expliquer les déficits mesurés de célérité et de pression. Elle met en avant la dégradation des propriétés théoriques de détonation résultant de la dilution et du réchauffement des réactifs par les produits de détonation. Nous proposons également un calcul du rendement thermodynamique qui, à la différence de modélisations antérieures, prend en compte la structure d’une détonation rotative. Nous décrivons aussi un calcul de hauteur de front de détonation pour les modes et géométries de chambre considérés dans cette thèse. Notre étude démontre ainsi l’intérêt de futures recherches sur la géométrie interne des chambres annulaires à détonation rotative et sur la prise en compte des phénomènes à l’origine des pertes d’efficacité.

Our study aims at improving the understanding of how a detonation may continuously rotate. It is focused on rotation modes in an annular chamber with constant or linearly increasing normal section. The functioning principle is based on the continuous injection of fresh reactive gases so as to regenerate a reactive layer…

Advisors/Committee Members: Vidal, Pierre (thesis director), Zitoun, Ratiba (thesis director).

Subjects/Keywords: Chambre à détonation rotative; Sections constante et croissante; Déficits de célérité et de pression; Rotating Detonation Engine (RDE); Constant or linearly-increasing section; Velocity and pressure deficits

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APA · Chicago · MLA · Vancouver · CSE | Export to Zotero / EndNote / Reference Manager

APA (6^th Edition):

Hansmetzger, S. (2018). Etude des modes de rotation continue d'une détonation dans une chambre annulaire de section constante ou croissante : On the Continuous-Rotation Modes of Detonation in an Annular Chamber with Constant or Lineartly-Increasing Normal Section. (Doctoral Dissertation). Chasseneuil-du-Poitou, Ecole nationale supérieure de mécanique et d'aérotechnique. Retrieved from http://www.theses.fr/2018ESMA0002

Chicago Manual of Style (16^th Edition):

Hansmetzger, Sylvain. “Etude des modes de rotation continue d'une détonation dans une chambre annulaire de section constante ou croissante : On the Continuous-Rotation Modes of Detonation in an Annular Chamber with Constant or Lineartly-Increasing Normal Section.” 2018. Doctoral Dissertation, Chasseneuil-du-Poitou, Ecole nationale supérieure de mécanique et d'aérotechnique. Accessed February 28, 2021. http://www.theses.fr/2018ESMA0002.

MLA Handbook (7^th Edition):

Hansmetzger, Sylvain. “Etude des modes de rotation continue d'une détonation dans une chambre annulaire de section constante ou croissante : On the Continuous-Rotation Modes of Detonation in an Annular Chamber with Constant or Lineartly-Increasing Normal Section.” 2018. Web. 28 Feb 2021.

Vancouver:

Hansmetzger S. Etude des modes de rotation continue d'une détonation dans une chambre annulaire de section constante ou croissante : On the Continuous-Rotation Modes of Detonation in an Annular Chamber with Constant or Lineartly-Increasing Normal Section. [Internet] [Doctoral dissertation]. Chasseneuil-du-Poitou, Ecole nationale supérieure de mécanique et d'aérotechnique; 2018. [cited 2021 Feb 28]. Available from: http://www.theses.fr/2018ESMA0002.

Council of Science Editors:

Hansmetzger S. Etude des modes de rotation continue d'une détonation dans une chambre annulaire de section constante ou croissante : On the Continuous-Rotation Modes of Detonation in an Annular Chamber with Constant or Lineartly-Increasing Normal Section. [Doctoral Dissertation]. Chasseneuil-du-Poitou, Ecole nationale supérieure de mécanique et d'aérotechnique; 2018. Available from: http://www.theses.fr/2018ESMA0002

24. Noralm, Zeerak. Implementing method for conducting Real Driving Emission (RDE).

Degree: Heat and Power Technology, 2018, KTH

URL: http://urn.kb.se/resolve?urn=urn:nbn:se:kth:diva-229083

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Det här projektet handlar om att utveckla en metod för real driving emission (RDE). RDE är ett komplement till Worldwide Light Duty Test Procedure… (more)

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Det här projektet handlar om att utveckla en metod för real driving emission (RDE). RDE är ett komplement till Worldwide Light Duty Test Procedure (WLTP) som kommer att ersätta New European Driving Cycle (NEDC). Dessa cykler och metoder används för att mäta personbilars avgaser. Huvudanledningen till varför NEDC ska bytas ut är för att körcyklerna inte längre är realistiska och reflekterar inte hur en bil presterar egentligen. Detta har lett till att bilar har högre bränsleförbrukning och högre avgasutsläpp när dom körs i trafiken jämfört med resultaten från NEDC.Metoden utvecklades genom hänvisningar till den officiella WLTP rapporten. Tillsammans med Vehicle Emission gruppen från AVL fastställdes en komplett steg för steg metod.Utrustningen som användes förseddes av AVL och flera tester av varje steg av metoden genomfördes för att förfina metoden så mycket som möjligt. Bilen som användes var en SAAB 9-5 2.0l bensin.Resultaten visade att både bilen och testet inte mötte kriterierna för RDE och godkändes inte av programmet som användes för att utvärdera testet. Detta var delvis för att kriterierna för RDE är strikta och delvis för att ingen pre och post test genomfördes eftersom det tar mycket tid för att dom testerna ska bli godkända.I överlag ger WLTP och RDE potentiella bilköpare en bättre detaljerad sammanfattning av hur bra bilen presterar i trafiken jämfört med NEDC.

This project is about developing a method for real driving emission (RDE). RDE is a complement to Worldwide Light Duty Test Procedure (WLTP) which will replace the New European Driving Cycle (NEDC). These cycles and procedures are used for measuring emissions for light duty vehicles. The main reason why NEDC is being replaced is because the driving cycles does not reflect how vehicles are normally driven. This has resulted in vehicles having higher fuel consumption and emitting more poisonous gases when driven on actual roads compared to the results from the NEDC.The method was developed by referring to the laws of the official WLTP report written by EU. Together with the Vehicle Emissions team at AVL a complete step by step method was established.All the equipment and instruments were provided by AVL and several tests of each step of the method was made to perfect the method as much as possible. The vehicle that was used was a 2005 SAAB 9-5 2.0l petrol.The results displayed that the car and the test did not meet the criteria for RDE and was not passed by the evaluating software. This was partly because the driving criteria for RDE are strict and can be difficult to achieve and partly because no pre and post test was made since it can take several tries before those tests are passed.Overall, WLTP and RDE give buyers a more detailed and better conclusion of how a car performs on the road compared to NEDC.

Subjects/Keywords: PEMS; RDE; Light Duty Vehicle; NEDC; PEMS; RDE; WLTP; NEDC; MAW; ECU; utsläpp/emission; körkriterier; Energy Engineering; Energiteknik

…complemented with RDE (Real Driving Emission). What separates RDE and WLTP from previous… …emission testing is that RDE reflects how a car is normally driven. There were many loopholes in… …did not really simulate real driving. Before RDE was introduced, emission testing could be… …Before the WLTP and RDE driving cycles were developed and implemented, all cars and… …complemented with RDE (Real driving emission). RDE tests will be performed by a driver who…

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APA · Chicago · MLA · Vancouver · CSE | Export to Zotero / EndNote / Reference Manager

APA (6^th Edition):

Noralm, Z. (2018). Implementing method for conducting Real Driving Emission (RDE). (Thesis). KTH. Retrieved from http://urn.kb.se/resolve?urn=urn:nbn:se:kth:diva-229083

Note: this citation may be lacking information needed for this citation format:
Not specified: Masters Thesis or Doctoral Dissertation

Chicago Manual of Style (16^th Edition):

Noralm, Zeerak. “Implementing method for conducting Real Driving Emission (RDE).” 2018. Thesis, KTH. Accessed February 28, 2021. http://urn.kb.se/resolve?urn=urn:nbn:se:kth:diva-229083.

Note: this citation may be lacking information needed for this citation format:
Not specified: Masters Thesis or Doctoral Dissertation

MLA Handbook (7^th Edition):

Noralm, Zeerak. “Implementing method for conducting Real Driving Emission (RDE).” 2018. Web. 28 Feb 2021.

Vancouver:

Noralm Z. Implementing method for conducting Real Driving Emission (RDE). [Internet] [Thesis]. KTH; 2018. [cited 2021 Feb 28]. Available from: http://urn.kb.se/resolve?urn=urn:nbn:se:kth:diva-229083.

Note: this citation may be lacking information needed for this citation format:
Not specified: Masters Thesis or Doctoral Dissertation

Council of Science Editors:

Noralm Z. Implementing method for conducting Real Driving Emission (RDE). [Thesis]. KTH; 2018. Available from: http://urn.kb.se/resolve?urn=urn:nbn:se:kth:diva-229083

Note: this citation may be lacking information needed for this citation format:
Not specified: Masters Thesis or Doctoral Dissertation

25. Poux, Tiphaine. Study of the oxygen reduction on perovskite-type oxides in alkaline media : Etude de la réduction d'oxygène sur les oxydes de type pérovskite en milieu alcalin.

Degree: Docteur es, Chimie physique, 2014, Université de Strasbourg

URL: http://www.theses.fr/2014STRAF001

►

La cinétique lente de la réduction de l’oxygène (ORR) est en grande partie responsable de la perte d’énergie de nombreux systèmes de conversion tels que… (more)

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La cinétique lente de la réduction de l’oxygène (ORR) est en grande partie responsable de la perte d’énergie de nombreux systèmes de conversion tels que les piles à combustible. Parmi les possibles catalyseurs de l’ORR, les oxydes de type pérovskite sont des candidats prometteurs en milieu alcalin. La présente thèse est consacrée à l’étude de l’activité, du mécanisme et de la stabilité de pérovskites à base de Co et Mn pour l’ORR. Grâce aux techniques d’électrode tournante à disque et disque-anneau (R(R)DE), les études de l’ORR et des transformations d’HO2- sur les couches minces de pérovskite/carbone dans une solution de NaOH ont montré qu’O2 est réduit en OH- via un mécanisme « en série » avec formation d’HO2- intermédiaire. Pour des quantités d’oxyde suffisantes, HO2- est ensuite réduit, ce qui résulte en un mécanisme apparent de 4 électrons. Dans ces électrodes, le carbone joue un double rôle. Il augmente l’activité électrocatalytique en améliorant le contact électrique et il est impliqué dans le mécanisme de l’ORR en catalysant la réduction d’O2 en HO2-, surtout pour les pérovskites à base de cobalt qui sont considérablement moins actives que celles à base de Mn. Néanmoins, l’électrocatalyse de l’ORR semble dégrader les sites actifs des pérovskites.

The sluggish kinetics of the oxygen reduction reaction (ORR) is largely responsible for the energy losses in energy conversion systems such as fuel cells. Among possible inexpensive catalysts for the ORR, perovskite oxides are promising electrocatalysts in alkaline media. The present thesis is devoted to the investigation of the ORR activity, mechanism and stability of some Co and Mn-based perovskites. The rotating (ring) disk electrode (R(R)DE) studies of the ORR and the HO2- transformations on perovskite/carbon thin layers in NaOH electrolyte prove that O2 is reduced to OH- via a “series” pathway with the HO2- intermediate. For high oxide loadings, the formed HO2- species are further reduced to give a global 4 electron pathway. In these electrodes, carbon plays a dual role. It increases the electrocatalytic activity by improving the electrical contact and it is involved in the ORR mechanism by catalyzing the reduction of O2 into HO2-, especially for Co-based perovskites which display lower reaction rates than Mn-based perovskites.

Advisors/Committee Members: Savinova, Elena R. (thesis director).

Subjects/Keywords: Pérovskites; Réaction de réduction d’oxygène (ORR); Électrolyte alcalin; Électrocatalyse; Carbone; Réduction et oxydation du peroxyde d’hydrogène; Décomposition du peroxyde d’hydrogène; Électrode à disque tournant (RDE); Électrode tournante à disque-anneau (RRDE); Cinétique et mécanisme de l’ORR; Couche mince; Voltamétrie cyclique (CV); Perovskite oxides; Oxygen reduction reaction (ORR); Alkaline electrolyte; Electrocatalysis; Carbon; Hydrogen peroxide reduction and oxidation; Hydrogen peroxide decomposition; Rotating disk electrode (RDE); Rotating ring-disk electrode (RRDE); ORR kinetics and mechanism; Thin layer; Cyclic voltammetry (CV); 541.39

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APA · Chicago · MLA · Vancouver · CSE | Export to Zotero / EndNote / Reference Manager

APA (6^th Edition):

Poux, T. (2014). Study of the oxygen reduction on perovskite-type oxides in alkaline media : Etude de la réduction d'oxygène sur les oxydes de type pérovskite en milieu alcalin. (Doctoral Dissertation). Université de Strasbourg. Retrieved from http://www.theses.fr/2014STRAF001

Chicago Manual of Style (16^th Edition):

Poux, Tiphaine. “Study of the oxygen reduction on perovskite-type oxides in alkaline media : Etude de la réduction d'oxygène sur les oxydes de type pérovskite en milieu alcalin.” 2014. Doctoral Dissertation, Université de Strasbourg. Accessed February 28, 2021. http://www.theses.fr/2014STRAF001.

MLA Handbook (7^th Edition):

Poux, Tiphaine. “Study of the oxygen reduction on perovskite-type oxides in alkaline media : Etude de la réduction d'oxygène sur les oxydes de type pérovskite en milieu alcalin.” 2014. Web. 28 Feb 2021.

Vancouver:

Poux T. Study of the oxygen reduction on perovskite-type oxides in alkaline media : Etude de la réduction d'oxygène sur les oxydes de type pérovskite en milieu alcalin. [Internet] [Doctoral dissertation]. Université de Strasbourg; 2014. [cited 2021 Feb 28]. Available from: http://www.theses.fr/2014STRAF001.

Council of Science Editors:

Poux T. Study of the oxygen reduction on perovskite-type oxides in alkaline media : Etude de la réduction d'oxygène sur les oxydes de type pérovskite en milieu alcalin. [Doctoral Dissertation]. Université de Strasbourg; 2014. Available from: http://www.theses.fr/2014STRAF001

26. Triestino, Michele. La dynamique des difféomorphismes du cercle selon le point de vue de la mesure : The dynamics of the generic circle diffeomorphism (with respect to the measure).

Degree: Docteur es, Mathématiques, 2014, Lyon, École normale supérieure

URL: http://www.theses.fr/2014ENSL0900

►

Les travaux de ma thèse s'articulent en trois parties distinctes.Dans la première partie j'étudie les mesures de Malliavin-Shavguldize sur les difféomorphismes du cercle et de… (more)

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Les travaux de ma thèse s'articulent en trois parties distinctes.Dans la première partie j'étudie les mesures de Malliavin-Shavguldize sur les difféomorphismes du cercle et de l'intervalle. Il s'agit de mesures de type « Haar » pour ces groupes de dimension infinie : elles furent introduites il a une vingtaine d'années pour permettre une étude de leur théorie des représentations. Un premier chapitre est dédié à recueillir les résultats présents dans la littérature et et les représenter dans une forme plus étendue, avec un regard particulier sur les propriétés de quasi-invariance de ces mesures. Ensuite j'étudie de problèmes de nature plus dynamique : quelle est la dynamique qu'on doit s'attendre d'un difféomorphisme choisi uniformément par rapport à une mesure de Malliavin-Shavguldize ? Je démontre en particulier qu'il y a une forte présence des difféomorphismes de type Morse-Smale.La partie suivante vient de mon premier travail publié, obtenu en collaboration avec Andrés Navas. Inspirés d'un théorème récent de Avila et Kocsard sur l'unicité des distributions invariantes par un difféomorphisme lisse minimal du cercle, nous analysons le même problème en régularité faible, avec des argument plus géométriques.La dernière partie est constituée des résultats récemment obtenus avec Mikhail Khristoforov et Victor Kleptsyn. Nous abordons les problèmes reliés à la gravité quantique de Liouville en étudiant des espaces auto-similaires qui sont la limite de graphes finis. Nous démontrons qu'il est possible de trouver des distances aléatoires non-triviales sur ces espaces qui sont compatibles avec la structure auto-similaire.

This thesis is divided into three different parts.In the first part, we study the Malliavin-Shavgulidze measure on circle and interval diffeomorphisms. They are Haar-like measures for these infinite-dimensional groups: they were introduced about twenty years ago to help to study their represantation theory. The first chapter collects the results that were obtained in the past years and in some cases we present them under a renewed point of view, with particular attention on quasi-invariance properties for this measures. Then we study some questions of dynamical nature: which is the typical dynamics that we must expect described by a diffeomorphism chosen randomly according to some Malliavin-Shavguldize measure? In particular, we prove that there is a strong presence of Morse-Smale diffeomorphisms.The third chapter comes from the published joint work with Andrés Navas. Inspired by a recent theorem by Avila and Kocsard about the uniqueness of the invariant distribution for a minimal smooth circle diffeomorphism, we analyse the same problem in low regularity, with more geometric arguments.The last part corresponds to the recent results obtained with Mikhail Khristoforov and Victor Kleptsyn. We consider problems in relation with Liouville quantum gravity, by studying self-similar metric spaces which are the limit of finite graphs. We prove that it is possible to find nontrivial random distances on these…

Advisors/Committee Members: Ghys, Étienne (thesis director).

Subjects/Keywords: Mesures de Malliavin-Shavguldize; Mesures quasi-invariantes; Difféomorphismes du cercle; Difféomorphismes Morse-Smale; Nombre de rotation; Mouvement brownien; Exemples de Denjoy; Équation cohomologique; Distributions invariantes; Graphes hiérarchiques; Gravité quantique de Liouville; Espaces métriques aléatoires; RDE; Malliavin-Shavguldize measures; Quasi-invariant measures; Cercle diffeomorphisms; Morse-Smale diffeomorphisms; Rotation-number; Brownian motion; Denjoy exemples; Cohomological equation; Invariant distributions; Hierarchical graphs; Liouville quantum gravity; Random metric spaces; RDE

Record Details Similar Records Cite « Share

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APA · Chicago · MLA · Vancouver · CSE | Export to Zotero / EndNote / Reference Manager

APA (6^th Edition):

Triestino, M. (2014). La dynamique des difféomorphismes du cercle selon le point de vue de la mesure : The dynamics of the generic circle diffeomorphism (with respect to the measure). (Doctoral Dissertation). Lyon, École normale supérieure. Retrieved from http://www.theses.fr/2014ENSL0900

Chicago Manual of Style (16^th Edition):

Triestino, Michele. “La dynamique des difféomorphismes du cercle selon le point de vue de la mesure : The dynamics of the generic circle diffeomorphism (with respect to the measure).” 2014. Doctoral Dissertation, Lyon, École normale supérieure. Accessed February 28, 2021. http://www.theses.fr/2014ENSL0900.

MLA Handbook (7^th Edition):

Triestino, Michele. “La dynamique des difféomorphismes du cercle selon le point de vue de la mesure : The dynamics of the generic circle diffeomorphism (with respect to the measure).” 2014. Web. 28 Feb 2021.

Vancouver:

Triestino M. La dynamique des difféomorphismes du cercle selon le point de vue de la mesure : The dynamics of the generic circle diffeomorphism (with respect to the measure). [Internet] [Doctoral dissertation]. Lyon, École normale supérieure; 2014. [cited 2021 Feb 28]. Available from: http://www.theses.fr/2014ENSL0900.

Council of Science Editors:

Triestino M. La dynamique des difféomorphismes du cercle selon le point de vue de la mesure : The dynamics of the generic circle diffeomorphism (with respect to the measure). [Doctoral Dissertation]. Lyon, École normale supérieure; 2014. Available from: http://www.theses.fr/2014ENSL0900

Brno University of Technology

27. Podal, Pavel. Studium vlastností katalyzátoru na bázi MnOx s využitím RRDE: Study of MnOx properties using RRDE.

Degree: 2019, Brno University of Technology

URL: http://hdl.handle.net/11012/8306

► This master thesis deals with qualifications of the catalytic materials for positive electrode low-temperature fuel cells. The teoretical part focuses on the physical and chemical… (more)

Subjects/Keywords: Palivový článek; nízkoteplotní palivový článek; oxid manganičitý; elektrochemie; lineární voltametrie; cyklická voltametrie; hydrodynamické metody; rotační disková elektroda; RDE; rotační disková elektroda s prstencem; RRDE; příprava katalyzátoru na bázi MnOx; aktivita katalyzátoru; koeficient sběrné účinnosti; redukce kyslíku.; Fuel cell; low-temperature fuel cell; manganese dioxide; electrochemistry; linear voltammetry; cyclic voltametry; hydrodynamic methods; rotation disc electrode; RDE; rotation ring disk electrode; RRDE; preparation catalyzer MnOx base; catalyst's activity; collection efficiency; reduction of dioxygen.

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APA · Chicago · MLA · Vancouver · CSE | Export to Zotero / EndNote / Reference Manager

APA (6^th Edition):

Podal, P. (2019). Studium vlastností katalyzátoru na bázi MnOx s využitím RRDE: Study of MnOx properties using RRDE. (Thesis). Brno University of Technology. Retrieved from http://hdl.handle.net/11012/8306

Note: this citation may be lacking information needed for this citation format:
Not specified: Masters Thesis or Doctoral Dissertation

Chicago Manual of Style (16^th Edition):

Podal, Pavel. “Studium vlastností katalyzátoru na bázi MnOx s využitím RRDE: Study of MnOx properties using RRDE.” 2019. Thesis, Brno University of Technology. Accessed February 28, 2021. http://hdl.handle.net/11012/8306.

Note: this citation may be lacking information needed for this citation format:
Not specified: Masters Thesis or Doctoral Dissertation

MLA Handbook (7^th Edition):

Podal, Pavel. “Studium vlastností katalyzátoru na bázi MnOx s využitím RRDE: Study of MnOx properties using RRDE.” 2019. Web. 28 Feb 2021.

Vancouver:

Podal P. Studium vlastností katalyzátoru na bázi MnOx s využitím RRDE: Study of MnOx properties using RRDE. [Internet] [Thesis]. Brno University of Technology; 2019. [cited 2021 Feb 28]. Available from: http://hdl.handle.net/11012/8306.

Note: this citation may be lacking information needed for this citation format:
Not specified: Masters Thesis or Doctoral Dissertation

Council of Science Editors:

Podal P. Studium vlastností katalyzátoru na bázi MnOx s využitím RRDE: Study of MnOx properties using RRDE. [Thesis]. Brno University of Technology; 2019. Available from: http://hdl.handle.net/11012/8306

Note: this citation may be lacking information needed for this citation format:
Not specified: Masters Thesis or Doctoral Dissertation

28. Vliet, Dennis Franciscus van der. Fuel cell electrocatalsis: oxygen reduction on Pt-based nanoparticle catalysts.

Degree: 2010, Faculty of Science, Leiden University

URL: http://hdl.handle.net/1887/15968

► The thesis contains a discussion on the subject of the Oxygen Reduction Reaction (ORR) on Pt-alloy nanoparticle catalysts in the Rotating Disk Electrode (RDE) method.… (more)

Subjects/Keywords: Fuel Cell; Oxygen Reduction Reaction (ORR); Electrocatalysis; Rotating Disk Electrode (RDE); Ohmic Drop; Catalyst pretreatment; Fuel Cell; Oxygen Reduction Reaction (ORR); Electrocatalysis; Rotating Disk Electrode (RDE); Ohmic Drop; Catalyst pretreatment

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APA · Chicago · MLA · Vancouver · CSE | Export to Zotero / EndNote / Reference Manager

APA (6^th Edition):

Vliet, D. F. v. d. (2010). Fuel cell electrocatalsis: oxygen reduction on Pt-based nanoparticle catalysts. (Doctoral Dissertation). Faculty of Science, Leiden University. Retrieved from http://hdl.handle.net/1887/15968

Chicago Manual of Style (16^th Edition):

Vliet, Dennis Franciscus van der. “Fuel cell electrocatalsis: oxygen reduction on Pt-based nanoparticle catalysts.” 2010. Doctoral Dissertation, Faculty of Science, Leiden University. Accessed February 28, 2021. http://hdl.handle.net/1887/15968.

MLA Handbook (7^th Edition):

Vliet, Dennis Franciscus van der. “Fuel cell electrocatalsis: oxygen reduction on Pt-based nanoparticle catalysts.” 2010. Web. 28 Feb 2021.

Vancouver:

Vliet DFvd. Fuel cell electrocatalsis: oxygen reduction on Pt-based nanoparticle catalysts. [Internet] [Doctoral dissertation]. Faculty of Science, Leiden University; 2010. [cited 2021 Feb 28]. Available from: http://hdl.handle.net/1887/15968.

Council of Science Editors:

Vliet DFvd. Fuel cell electrocatalsis: oxygen reduction on Pt-based nanoparticle catalysts. [Doctoral Dissertation]. Faculty of Science, Leiden University; 2010. Available from: http://hdl.handle.net/1887/15968

Aristotle University Of Thessaloniki (AUTH); Αριστοτέλειο Πανεπιστήμιο Θεσσαλονίκης (ΑΠΘ)

29. Triantafyllopoulos, Georgios. Assessment of technologies to reduce fuel consumption and pollutant emissions of modern passenger cars in real - world driving conditions.

Degree: 2018, Aristotle University Of Thessaloniki (AUTH); Αριστοτέλειο Πανεπιστήμιο Θεσσαλονίκης (ΑΠΘ)

URL: http://hdl.handle.net/10442/hedi/45500

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In the context of this dissertation, the fuel consumption and emissions of many vehicles were measured under various driving conditions and emission and consumption reduction… (more)

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In the context of this dissertation, the fuel consumption and emissions of many vehicles were measured under various driving conditions and emission and consumption reduction technologies were investigated. The impact of conventional fuel consumption reduction technologies was simulated by modeling a gasoline and diesel vehicle under NEDC, WLTP and CADC driving cycles, using the AVL Cruise platform. The technologies tested include brake energy recuperation, start-stop, vehicle mass reduction, aerodynamic resistance reduction, rolling resistance reduction, gearbox changes and engine efficiency improvements. Each technology has a different impact on each driving cycle, while the overall reduction in fuel consumption and CO2 emissions achieved by combining all technologies was in the range of 12-14%. Concerning pollutant reduction technologies, the possibility of reducing NOx emissions of a Euro 6b diesel vehicle was studied. Initially, the vehicle was tested on the road following the RDE regulation where it emitted 5 times more NOx than the 80 mg/km limit. The vehicle’s engine operation was simulated on a laboratory dyno, where an identical engine was installed. Modifications were made to the exhaust aftertreatment system, including the replacement of the LNT system with an SCR system. The modifications reduced NOx emissions by 90%, achieving compliance with the Euro 6 limits without requiring any additional fuel consumption. The effect of driving conditions on emissions and fuel consumption was then addressed. In particular, three Euro 6 diesel vehicles were tested in the NEDC, WLTP, CADC driving cycles and on the road, on normal RDE-compliant routes and other more dynamic ones. The emissions reduction strategy of the three vehicles seems to be exclusively targeting the NEDC cycle, as at non-NEDC operating conditions the use of anti-pollution systems is minimized. WLTP emissions were closer to the emissions measured under real conditions; however, the engine operating range during the road tests was greater than the range during laboratory tests. In addition, NOx emission levels increase dramatically when driving the vehicle in a more dynamic manner outside the boundaries of the RDE regulation. Finally, on-road emissions measurements were carried out on a fleet of eight vehicles, two diesel, one gasoline, one LPG vehicle, one CNG, one hybrid and two older gasoline vehicles which had been converted to gasoline-LPG dual fuels. No fuel/engine type had low CO2, CO and NOx emissions over the full range of real world driving conditions. However, it is worth mentioning that the older gasoline-LPG vehicles had the worst emission performance, the CNG vehicle had the lowest CO2 emissions and the hybrid had the lowest CO and NOx emissions combined. With regard to conventional vehicle types, diesel vehicles had very high NOx emissions, while gasoline vehicles had extremely high CO emissions under dynamic driving conditions, reaching 35 times the regulatory limits.

Στα πλαίσια της παρούσας διατριβής αποτυπώθηκαν οι εκπομπές και…

Subjects/Keywords: Εκπομπές οξειδίου του αζώτου; Εκπομπές διοξειδίου του άνθρακα; Εκπομπές CO2; Εκπομπές NOx; Εκπομπές καυσαερίων; Μείωση εκπομπών; Ντίζελ; Εκπομπές σε πραγματικές συνθήκες οδήγησης; Κύκλος οδήγησης; RDE; CO2; NOx; Diesel; Euro 6; Vehicle emissinos; LPG; CNG; NEDC; WLTP; CADC; AVL Cruise; Fuel consumption; Emission reduction; Driving cycles

Record Details Similar Records Cite « Share

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APA · Chicago · MLA · Vancouver · CSE | Export to Zotero / EndNote / Reference Manager

APA (6^th Edition):

Triantafyllopoulos, G. (2018). Assessment of technologies to reduce fuel consumption and pollutant emissions of modern passenger cars in real - world driving conditions. (Thesis). Aristotle University Of Thessaloniki (AUTH); Αριστοτέλειο Πανεπιστήμιο Θεσσαλονίκης (ΑΠΘ). Retrieved from http://hdl.handle.net/10442/hedi/45500

Note: this citation may be lacking information needed for this citation format:
Not specified: Masters Thesis or Doctoral Dissertation

Chicago Manual of Style (16^th Edition):

Triantafyllopoulos, Georgios. “Assessment of technologies to reduce fuel consumption and pollutant emissions of modern passenger cars in real - world driving conditions.” 2018. Thesis, Aristotle University Of Thessaloniki (AUTH); Αριστοτέλειο Πανεπιστήμιο Θεσσαλονίκης (ΑΠΘ). Accessed February 28, 2021. http://hdl.handle.net/10442/hedi/45500.

Note: this citation may be lacking information needed for this citation format:
Not specified: Masters Thesis or Doctoral Dissertation

MLA Handbook (7^th Edition):

Triantafyllopoulos, Georgios. “Assessment of technologies to reduce fuel consumption and pollutant emissions of modern passenger cars in real - world driving conditions.” 2018. Web. 28 Feb 2021.

Vancouver:

Triantafyllopoulos G. Assessment of technologies to reduce fuel consumption and pollutant emissions of modern passenger cars in real - world driving conditions. [Internet] [Thesis]. Aristotle University Of Thessaloniki (AUTH); Αριστοτέλειο Πανεπιστήμιο Θεσσαλονίκης (ΑΠΘ); 2018. [cited 2021 Feb 28]. Available from: http://hdl.handle.net/10442/hedi/45500.

Note: this citation may be lacking information needed for this citation format:
Not specified: Masters Thesis or Doctoral Dissertation

Council of Science Editors:

Triantafyllopoulos G. Assessment of technologies to reduce fuel consumption and pollutant emissions of modern passenger cars in real - world driving conditions. [Thesis]. Aristotle University Of Thessaloniki (AUTH); Αριστοτέλειο Πανεπιστήμιο Θεσσαλονίκης (ΑΠΘ); 2018. Available from: http://hdl.handle.net/10442/hedi/45500

Note: this citation may be lacking information needed for this citation format:
Not specified: Masters Thesis or Doctoral Dissertation

Penn State University

30. Kaintz, Anne Elizabeth. Mechanistic Studies in Water Splitting Systems .

Degree: 2010, Penn State University

URL: https://submit-etda.libraries.psu.edu/catalog/11598

► In the first of two projects, electrochemical kinetics studies were intended to elucidate the mechanism of hydrogen reduction at a Rh/Cr2O3 (core/shell) reduction catalyst for… (more)

Subjects/Keywords: hydrogen reduction catalysts; RDE; niobium electrodes; fabrication; homemade; UME; ultramicroelectrodes; photodeposition; degradation; hexaniobate nanoscrolls

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APA · Chicago · MLA · Vancouver · CSE | Export to Zotero / EndNote / Reference Manager

APA (6^th Edition):

Kaintz, A. E. (2010). Mechanistic Studies in Water Splitting Systems . (Thesis). Penn State University. Retrieved from https://submit-etda.libraries.psu.edu/catalog/11598

Note: this citation may be lacking information needed for this citation format:
Not specified: Masters Thesis or Doctoral Dissertation

Chicago Manual of Style (16^th Edition):

Kaintz, Anne Elizabeth. “Mechanistic Studies in Water Splitting Systems .” 2010. Thesis, Penn State University. Accessed February 28, 2021. https://submit-etda.libraries.psu.edu/catalog/11598.

Note: this citation may be lacking information needed for this citation format:
Not specified: Masters Thesis or Doctoral Dissertation

MLA Handbook (7^th Edition):

Kaintz, Anne Elizabeth. “Mechanistic Studies in Water Splitting Systems .” 2010. Web. 28 Feb 2021.

Vancouver:

Kaintz AE. Mechanistic Studies in Water Splitting Systems . [Internet] [Thesis]. Penn State University; 2010. [cited 2021 Feb 28]. Available from: https://submit-etda.libraries.psu.edu/catalog/11598.

Note: this citation may be lacking information needed for this citation format:
Not specified: Masters Thesis or Doctoral Dissertation

Council of Science Editors:

Kaintz AE. Mechanistic Studies in Water Splitting Systems . [Thesis]. Penn State University; 2010. Available from: https://submit-etda.libraries.psu.edu/catalog/11598

Note: this citation may be lacking information needed for this citation format:
Not specified: Masters Thesis or Doctoral Dissertation

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