Browsing Theses - Department of Mechanical Engineering by Issue Date
Now showing items 21-40 of 67
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Design and fabrication of micro end mills for the machining of difficult-to-cut materials
(Bilkent University, 2016-09)Micromilling is a cost-e ective method of fabricating miniaturized components with complex, three-dimensional features made from di cult-to-cut materials. Microcutting tools are exposed to harsh conditions during machining ... -
Modeling of inertial particle flow and entry gas flow in micro-channels
(Bilkent University, 2017-02)Micro uidics is integration of micro-fabrication techniques together with the knowledge of ow behavior at micro scale to design and achieve particle manipulation, separation, sorting and etc. which is important for ... -
Development of nanoelectromechanical systems functionalized by vacuum organic thermal evaporation and their gas sensing applications
(Bilkent University, 2017-02)Nanoelectromechanical systems (NEMS) are an exquisite sensor technology which is also potentially low-cost since it can be measured electronically and large scale produced using semiconductor fabrication techniques. Since ... -
Genetically-tunable morphology and mechanical properties of bacterial functional amyloid nanofibers
(Bilkent University, 2017-05)The highly dynamic behavior of material systems exploited by nature results in research efforts to employ them as next generation biomaterials exhibiting sustainability and resistance against harsh environmental conditions. ... -
Investigation of structural lubricity on platinum nanoparticles under ambient conditions
(Bilkent University, 2017-05)Structural lubricity describes a state of ultra-low friction involving relative motion between atomically flat and molecularly clean surfaces with incommensurate structures. While the occurrence of structural lubricity was ... -
Pressure control of gas generator in throttleable ducted rockets: a time delay resistant adaptive control approach
(Bilkent University, 2017-06)Having variable thrust during the operation of a rocket provides tremendous advantages while chasing down a target. For ducted rockets, the key factor to obtain variable thrust is the precise pressure control inside the ... -
Design, fabrication, and applications of multi-mode nanoelectromechanical systems
(Bilkent University, 2017-07)Miniaturization of systems allowed wide spread consumer use of microelectronics, integrated circuits and MEMS based sensors. Thanks to the advancement in microfabrication methods, it is possible to build structures with ... -
Modeling of NC-AFM experiments by the utilization of molecular dynamics and the harmonic oscillator model
(Bilkent University, 2017-07)Atomic force microscopy is a widely-used instrument in nanotechnology and nanoscience. Imaging of single molecules, atoms or even bond structures and tip-sample interactions with pm and pN resolution are made possible with ... -
A game theoretical framework for the evaluation of unmanned aircraft systems airspace integration concepts
(Bilkent University, 2017-08)Predicting the outcomes of integrating Unmanned Aerial Systems (UAS) into the National Aerospace (NAS) is a complex problem which is required to be addressed by simulation studies before allowing the routine access of ... -
A droplet-based microfluidic reactor for silica nanoparticle synthesis and post processing of quantum dots
(Bilkent University, 2017-08)The unique properties of nanoparticles mainly depend on their size and morphology; thus, it is of the utmost importance to synthesize them monodispersely to be useful in an application. Micro uidic reactors enable a ... -
Thermal performance characterization of flat grooved heat pipes
(Bilkent University, 2017-08)Heat pipes are promising heat removal devices widely used in a variety of elds ranging from thermal management of electronic components to terrestrial and aerospace applications. Their working principle, phase change ... -
Investigation of TI6AL4V microstructure effects on process material interaction during micro milling
(Bilkent University, 2018-01)The interrelationship between material microstructure and process parameters must be well understood in order to improve the machinability. In micro milling, the process parameters including depth of cut, feed and cutting ... -
Optimization of compliant joints used in miniature foldable robotics
(Bilkent University, 2018-04)In small scale and more specifically in miniature robotics applications, compliant mechanisms are highly preferred because of their advantages such as, less moving parts, friction losses, assembly time and effort, but ... -
Effect of channel geometry on alternating droplet generation
(Bilkent University, 2018-06)Droplet based micro uidics has been one of the popular topics in micro udics research for the past two decades due to several advantages which include: less amount of reagent (sample) being used, enhanced mixing in the ... -
A novel analogy: application of higher-order mode theory in the mechanical domain to the electromagnetic domain
(Bilkent University, 2018-08)It is crucial to engineer novel detection schemes that can extract information pertinent to the morphological properties of the analytes for widespread usage of lab-on-a-chip technology. Within the scope of this thesis, ... -
Mass and stiffness spectrometry of nanoparticles and bio-molecules by nanoelectromechanical systems
(Bilkent University, 2018-08)Mass spectrometry (MS) is a technique used frequently in mass measurements in order to identify mass of the molecules. Nanoelectromechanical systems are highly sensitive to adhered species, thus using NEMS devices, it ... -
Design, fabrication, and applications of electrostatically buckled nanomechanical systems
(Bilkent University, 2018-08)Buckling is an important resource for memory and sensing applications at the micro- and nano-scale. Although di erent approaches have been developed to access buckling, such as the use of pre-stressed beams or thermal ... -
Surface integrated membrane nanomechanical and microwave coplanar waveguide based biosensors
(Bilkent University, 2018-08)Nanoelectromechanical Systems, or NEMS, is the further miniaturized extension of novel devices of 40 years ago, Microelectromechanical Systems or MEMS in short. Nano scale devices first appeared at the dawn of 21st century ... -
Multimode microwave sensors for microdroplet and single-cell detection
(Bilkent University, 2018-08)A novel detection mechanism which can reveal both morphological and electrical properties of analytes are needed for Lab-on-a-Chip applications. Herein, a label-free, real-time and non-contact detection paradigm in ... -
An investigation of the effects of human dynamics on system stability and performance
(Bilkent University, 2018-08)Considered as a challenging element of closed-loop structures, the human operator, and his/her interactions with the underlying system, should be carefully analyzed to obtain a safe and high performing system. In this ...
