Information Technology | Scholarship for Nigerians and Africans - Part 205

PhD Studentship in Ocean Biogeochemistry, MPI-M, Germany

/ February 28, 2011 Leave a Comment

The applicant will be part of the Research Group Ocean Biogeochemistry in the Department The Ocean in the Earth System. The research will focus on reconstructing the ocean carbon cycle and its interactions with climate during the Paleocene-Eocene Thermal Maximum. The main tool will be the existing Earth system model of the MPI-M, which includes the ocean biogeochemistry model HAMOCC. One of the objectives of the project will be to improve our understanding of the PETM and its potential to serve as an analogue of the future climate perturbations due to anthropogenic CO2 emissions.

Requirements: We are looking for a highly motivated individual with a M.Sc. or diploma in Geosciences, Oceanography, Environmental Sciences, Physics or a related field. Experience, or a strong interest in biogeochemistry and modeling is of advantage. Good programming skills (FORTRAN on Unix platforms) are desirable, since the applicant will use facilities of the high performance computing centre. The working language is English. The MPI-M encourages doctoral students to participate in the International Max Planck Research School on Earth System Modeling.

Scholarship Application Deadline: before 15th of March 2011

Further Scholarship Information and Application

Filed Under: Doctorate Degree, Engineering, Information Technology, Medical Science, Physical Science Tags: , , , , , , , ,

Doctoral Scholarship in GaN-based Single Photon Emitters, Germany: Quantum Metrology

/ February 28, 2011 Leave a Comment

The interest in single-photon-emitters rises continuously since quantum communication based on the polarization of single photons has already been demonstrated. Unfortunately up to now almost all single-photon sources are pumped optically which makes the realization of a widespread communication network very complex.

For this reason it would be of great advantage to fabricate electrically pumped single-photon-sources. This can be realized e. g. by fabricating LED structures with active regions, where only single ions are incorporated, leading to single photon emission. The LEDs could be driven electrically and the optical energy of the LED is transferred to the single transition available in the active region of the LED. Today, only very few reports on electrical single photon sources are available.

Zinc is a very promising candidate as a single photon emitter in GaN based LEDs. Zn acceptors show efficient emission in the blue spectral range. Zn creates a deep acceptor level 0.3 eV – 0.4 eV above the valence band. Furthermore, Silicon-codoping is required for efficient optical emission, resulting in a very bright photo-luminescence at 2.9 eV (~ 430 nm) which has been assigned to donor-acceptor (DA) transitions.

The goal of this thesis is to investigate single transitions in GaN based LEDs with Zn and Si co-doping. LEDs will be fabricated by MOCVD and processed in house. A thorough analysis of the relevant optical transitions by time resolved optical characterization will allow to get information on the nature and characteristics of the transitions, as well as on the emission statistics in order to get a quantitative handle on the statistical quality of single photon emission correlated with that.

Scholarship Application Deadline: 31 March 2011

Further Scholarship Information and Application

Filed Under: Doctorate Degree, Engineering, Information Technology, Physical Science Tags: , , , , , , , ,

PhD in Quantitative Mass Spectrometry by LC-ESI-IT-MS, IGSM, Germany

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Signal strength in mass spectrometry strongly depends on the chemistry and size of analytes and can therefore not simply be used for quantification. In the field of polysaccharide derivatives, e.g. cellulose ethers, the molar composition of complex oligomeric mixtures obtained by partial depolymerization of the polymer, need to be analyzed. Accuracy of quantitative data is of high importance for pattern evaluation of these chemically modified biopolymers.

In Electrospray Ionization (ESI), surface activity and electrophoretic mobility of analytes, solvent and solvation energy, play an important role for relative ion yields of the components of a mixture. In addition, instrumental parameters as skimmer voltages and target mass influence the ion current. Coupling of the MS to Liquid chromatrography (LC) can mitigate effects of competition of analytes, and allow to optimize individual measurement conditions. Aim of the project is to study and quantify the factors of influence. Therefore, defined oligosaccharide derivatives shall be synthesized as model compounds and their behavior be studied.

The Braunschweig IGSM aims at increasing the number of women in scientific positions. Female candidates are therefore particularly encouraged to apply.
You are required to hold an excellent university degree (master’s or equivalent degree) in physics, chemistry, electrical or mechanical engineering, mathematics, information technology or related fields. Please note that the entire program is run in English, so fluency in both written and spoken English is required. Skills in German are welcome.
You may be a member of the IGSM for up to 3 years. In your first semester, you will be accepted on a probationary basis.

Scholarship Application Deadline: 31 March 2011

Further Scholarship Information and Application

Filed Under: Doctorate Degree, Engineering, Information Technology, Physical Science Tags: , , , , , , , , ,
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