Designing electrical contacts to MoS2_2 monolayers: A computational study

Studying the reason, why single-layer molybdenum disulfide (MoS$_2$) appears to fall short of its promising potential in flexible nanoelectronics, we found that the nature of contacts plays a more important role than the semiconductor itself. In order to understand the nature of MoS$_2$/metal contacts, we performed ab initio density functional theory calculations for the geometry, bonding and electronic structure of the contact region. We found that the most common contact metal (Au) is rather inefficient for electron injection into single-layer MoS$_2$ and propose Ti as a representative example of suitable alternative electrode materials

LaTeX Build System

Import 05/08/2014Cílem této práce je analyzovat současné sestavovací systémy pro LaTeX a s výsledky této analýzy následně vytvořit svůj vlastní sestavovací systém. Avšak v plánu není nic převratného.Goal of this bachelor thesis is to analyze current build systems for LATEX. After analyzing the build systems I would like to make my own build system with the information I obtained. However we do not plan something revolutionary.460 - Katedra informatikyvelmi dobř

Harmonic generator for simulation of analog circuits models

Cílem této práce je prozkoumat možnosti generování diskrétního harmonického signálu na obvodu ASIC a FPGA za účelem simulace analogových obvodů. V teoretické části jsou rozebrány vybrané algoritmy, které se nejvíce hodí pro tuto aplikaci. V praktické části jsou jednotlivé algoritmy realizovány a je určen vhodný algoritmus pro danou aplikaci s ohledem na požadované vlastnosti signálu.The purpose of this paper is to explore the posibilities of genarating harmonic signal on a ASIC and FPGA chip with emphasis on simulation of analog circuits. In theoretical section the algoritms suited best for this purpose are expained. In practical section these algorithms are realized and a conclusion is drawn based on required properties of signal.

Optimization of Wireless Localization Technigues

Předmětem práce je problematika zaměřování bezdrátových jednotek v lokalizačních systémech řešených senzorickými sítěmi. Práce popisuje princip trilaterace a Levenberg-Marquardtův algoritmus. Hlavní částí práce jsou simulace chování lokalizačních systémů a možnosti optimalizace lokalizace.The main theme of this thesis are problems of locating of wireless units in localization systems represented by wireless sensor networks. The thesis describes principle of trilateration and Levenberg-Marquardt algorithm. The main theme of this thesis is simulation of behavior of localisation systems and possible optimization of localization.

Recursion and Path-Integral Approaches to the Analytic Study of the Electronic Properties of C60C_{60}

The recursion and path-integral methods are applied to analytically study the electronic structure of a neutral $C_{60}$ molecule. We employ a tight-binding Hamiltonian which considers both the $s$ and $p$ valence electrons of carbon. From the recursion method, we obtain closed-form {\it analytic} expressions for the $\pi$ and $\sigma$ eigenvalues and eigenfunctions, including the highest occupied molecular orbital (HOMO) and the lowest unoccupied molecular orbital (LUMO) states, and the Green's functions. We also present the local densities of states around several ring clusters, which can be probed experimentally by using, for instance, a scanning tunneling microscope. {}From a path-integral method, identical results for the energy spectrum are also derived. In addition, the local density of states on one carbon atom is obtained; from this we can derive the degree of degeneracy of the energy levels.Comment: 19 pages, RevTex, 6 figures upon reques