Mitarbeiter

M. Sc. Doaa Ahmed

Kontakt

  • E-Mail:
  • Telefon: 09131/85-27188
  • Fax: Neu:09131/85-28730
  • Raum: 01.178 H
  • Neu: Wetterkreuz 15
    91058 Erlangen

Über Doaa Mahmoud Ahmed Ahmed

Biography

Doaa Ahmed was born in Ismailia, Egypt in 1988. She received the B.Sc. degree  (with Honours) in Communications and Electronics Engineering from Suez Canal University, Egypt, in 2010 and the M.Sc. degree in Communications and Multimedia Engineering from Friedrich-Alexander University Erlangen-Nuremberg, Erlangen, Germany, in 2016.

From 2010 to 2014, she was a Research and Teaching Assistant with the Chair of Communications and Electronics, Suez Canal University, Egypt. She is currently pursuing the Ph.D. degree in Electronics and Medical Engineering at Friedrich-Alexander University Erlangen-Nuremberg, Erlangen, Germany.

Areas of Interest

  • Human Body Communications
  • Electromagnetics and Antennas 
  • Molecular Communications

Open thesis projetcs

Design of a molecular communication  receiver that is able to separate the received particles based on their sizes.

Molecular communication uses molecules to transmit and receive signals rather than the electrical signal or electromagnetic waves used in the traditional communication systems. In our model, we use super-paramagnetic iron oxide  nanoparticles (SPIONs) as information carriers because of their magnetic properties. SPIONs are also biocompatible, therefore they are widely used in the medical applications. A suspension of SPIONs is released in a water flow until being received and detected at the receiver side. The receiver is represented by a coil with the tube goes through its core, when the particles are released in the water flow they travel with the flow until they pass through the core of the coil that generates electrical signal relative to the number of particles in its core. From the telecommunications perspective, when the received signal strength increases this can be used to represent bit 1, on the contradict, when no change in the received signal is detected, this can be translated to bit 0. From theory, when we apply external magnetic field to the model, we will be able to overcome the advection flow,  reorient the particles and change their directions based on their size. We aim to find a student who has a good background in the magnetic field and fluid theory, familiar with COMSOL software to design a simulation-based model, in which different particle sizes are being injected into the channel  and separated at the receiver, which will help increasing the capacity of the channel.

Publikationen

2019

  • H. Unterweger, J. Kirchner, W. Wicke, A. Ahmadzadeh, D. M. A. Ahmed, V. Jamali Kooshkghazi, C. Alexiou, G. Fischer, R. Weigel, and R. Schober, "Experimental Molecular Communication Testbed Based on Magnetic Nanoparticles in Duct Flow" in 19th IEEE International Workshop on Signal Processing Advances in Wireless Communications, Kalamata, Greece, 2019 (to be published). [Bibtex]
    @inproceedings{unterweger2018,
    abstract = {Simple and easy to implement testbeds are needed to further advance molecular communication research. To this end, this paper presents an in-vessel molecular communication testbed using magnetic nanoparticles dispersed in an aqueous suspension as they are also used for drug targeting in biotechnology. The transmitter is realized by an electronic pump for injection via a Yconnector. A second pump provides a background flow for signal propagation. For signal reception, we employ a susceptometer, an electronic device including a coil, where the magnetic particles move through and generate an electrical signal. We present experimental results for the transmission of a binary sequence and the system response following a single injection. For this flowdriven particle transport, we propose a simple parameterized mathematical model for evaluating the system response. 
    }, author = {Unterweger, Harald and Kirchner, Jens and Wicke, Wayan and Ahmadzadeh, Arman and Ahmed, Doaa Mahmoud Ahmed and Jamali Kooshkghazi, Vahid and Alexiou, Christoph and Fischer, Georg and Weigel, Robert and Schober, Robert}, language = {English}, booktitle = {19th IEEE International Workshop on Signal Processing Advances in Wireless Communications}, cris = {https://cris.fau.de/converis/publicweb/publication/203248614}, year = {2019}, month = {06}, day = {25}, eventdate = {2018-06-25/2018-06-28}, faupublication = {yes}, keywords = {Molecular communication; magnetic nanoparticles}, note = {unpublished}, peerreviewed = {Yes}, title = {Experimental Molecular Communication Testbed Based on Magnetic Nanoparticles in Duct Flow}, type = {Konferenzschrift}, venue = {Kalamata, Greece}, }

2018

  • D. M. A. Ahmed, J. Kirchner, and G. Fischer, "Signal Transmission with Intra-body and Inter-body Communications (Simulation-based Models)" in 13th EAI International Conference on Body Area Networks (BODYNETS 2018), Oulu, Finland, 2018 (to be published). [Bibtex]
    @inproceedings{ahmed2018,
    abstract = {In this paper, we investigate two types of data transmission in human body communication (HBC) with galvanic coupling: Intra-body communication along a human arm and inter-body communication between
    two arms in touch. For the former, the effect of bending the arm is investigated, too. The arms were modeled
    as five-layers concentric cylinders of different types of tissue. For simulation, the finite element method (FEM) COMSOL Multiphysics5.3a software was used. The influence of different HBC key parameters including applied frequency, distance between transmitter (TX) and receiver (RX), bending, contact area between the contiguous models, and induced current were investigated. The results show that the transmission loss increases with the increase of the transmission length and operating frequency. The electrical potential is directly proportional to the induced current. Bending helps to improve the detected signal in the cases of short distance between TX and RX around the curvature. For distant transceivers, both straight and bended models tend to behave in a close manner. However, no joints are added to the model. The signal degradation in inter-body communication is considerably higher compared to intra-body communication at the same horizontal distance between TX and RX. At frequencies above 200 kHz, both inter-body and intra-body communication give close values when the contact area between the arms covers the distance between TX and RX electrodes. In addition, by increasing the contact area and avoiding gaps between the models, the detected signal is improved. The results illustrate the main determinants of information transmission between both sensors within a body-sensors-network and between different person.
    }, author = {Ahmed, Doaa Mahmoud Ahmed and Kirchner, Jens and Fischer, Georg}, language = {English}, booktitle = {13th EAI International Conference on Body Area Networks (BODYNETS 2018)}, cris = {https://cris.fau.de/converis/publicweb/publication/203249033}, year = {2018}, month = {10}, day = {02}, eventdate = {2018-10-02/2018-10-03}, faupublication = {yes}, keywords = {Cole-Cole expressions; dielectric properties; human tissue; finite element model; galvanic coupling; human body communication; inter-body communication; intra-body communication}, note = {unpublished}, peerreviewed = {Yes}, title = {Signal Transmission with Intra-body and Inter-body Communications (Simulation-based Models)}, type = {Konferenzschrift}, venue = {Oulu, Finland}, }

2017

  • D. M. A. Ahmed, J. Kirchner, and G. Fischer, "Wave Propagation with Human Body Communications in BANs" in 2017 IEEE MTT-S International Conference on Numerical Electromagnetic and Multiphysics Modeling and Optimization for RF, Microwave, and Terahertz Applications (NEMO), Sevilla, Spain, 2017, pp. 16-18. [DOI] [Bibtex]
    @inproceedings{ahmed2017,
    abstract = {Today's interest in health assistance systems, sport activities and remote patient monitoring require distributing various types of sensors at specific places across the human body. These sensors might be used to measure temperature, blood pressure level, blood glucose level and the like. This implies collecting the data generated at the distributed sensors in a wireless Body Area Network (BAN) and fusing these data at a central processing unit, which transfers the data, if needed, to a hospital or medical center for diagnosing. Whereas, transmission could be done for real time or stored data depending on the application scenario. However, sending data wirelessly is typically a very energy intensive task implying large batteries. Hence, BAN networks have been developed by IEEE 802.15.Task Group (TG6) to serve a variety of applications including medical, consumer lifestyle and entertainment applications at low power consumption. Human Body Communication is a non-RF propagation system in BAN network that utilizes the human body as a transmission medium to transfer data between several points inside, on or sometimes near the human body using electrodes, rather than antennas based on near field communication and quasistatic field approximations.},
    author = {Ahmed, Doaa Mahmoud Ahmed and Kirchner, Jens and Fischer, Georg},
    language = {English},
    booktitle = {2017 IEEE MTT-S International Conference on Numerical Electromagnetic and Multiphysics Modeling and Optimization for RF, Microwave, and Terahertz Applications (NEMO)},
    cris = {https://cris.fau.de/converis/publicweb/publication/108446624},
    year = {2017},
    month = {07},
    day = {03},
    doi = {10.1109/NEMO.2017.7964172},
    eventdate = {2017-05-17/2017-05-19},
    faupublication = {yes},
    isbn = {9781509048373},
    keywords = {Body Area Communication; Galvanic Coupling; Human Arm Model},
    pages = {16--18},
    peerreviewed = {Yes},
    title = {Wave Propagation with Human Body Communications in BANs},
    type = {Konferenzschrift},
    venue = {Sevilla, Spain},
    }
  • D. M. A. Ahmed, J. Kirchner, and G. Fischer, "Wave Propagation with HBC in a Human Arm Model" in 2017 IEEE International Symposium on Medical Measurements and Applications (MeMeA), Rochester, MN, USA, 2017, pp. 448-452. [DOI] [Bibtex]
    @inproceedings{ahmed2017a,
    abstract = {Today’s interest in health assistance systems, sport activities, person’s vital signs observing and remote patient monitoring require distributing various types of sensors at specific places across the human body. These sensors might be used to measure temperature, blood pressure level, blood glucose level and the like. This implies collecting the data generated at the distributed sensors in a wireless Body Area Network (BAN) and fusing these data at an access point (e.g. wristwatch) and then to a central processing unit (i.e., PC) for diagnosing, as shown in Fig. 1. However, sending data wirelessly is typically a very energy intensive task implying large batteries. Hence, BAN networks have been developed by IEEE 802.15.Task Group (TG6) to serve a variety of applications including medical, consumer lifestyle and the like at a low power consumption. Human Body Communications (HBC) is one technique used in BAN networks that utilizes the human body as a transmission medium to transfer data between sensors on, in or at the proximity of the human body using electrodes (i.e., electrical conductors).},
    author = {Ahmed, Doaa Mahmoud Ahmed and Kirchner, Jens and Fischer, Georg},
    language = {English},
    booktitle = {2017 IEEE International Symposium on Medical Measurements and Applications (MeMeA)},
    cris = {https://cris.fau.de/converis/publicweb/publication/109721304},
    year = {2017},
    month = {07},
    day = {20},
    doi = {10.1109/MEMEA.2017.7985918},
    eventdate = {2017-05-07/2017-05-10},
    faupublication = {yes},
    isbn = {9781509029846},
    keywords = {Body Area Communication; Galvanic Coupling; Human Arm Model},
    pages = {448--452},
    peerreviewed = {Yes},
    title = {Wave Propagation with HBC in a Human Arm Model},
    type = {Konferenzschrift},
    venue = {Rochester, MN, USA},
    }

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