Global ETD Search
Search theses and dissertations gathered from participating repositories worldwide. Every result links back to the library that holds it. No account is needed.
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Showing 1 to 20 of 33 for “"Indirect detection"”.
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Listening to the Universe through indirect detection
Indirect detection is the search for the particle nature of dark matter with astrophysical probes. Manifestly, it exists right at the intersection of particle physics and astrophysics, and the discovery potential for dark matter can be greatly extended using insights from both disciplines. This …
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Indirect Detection of Explosive Vapours by Thermal Dissociation Cavity Ring-Down Spectroscopy
This thesis describes two explosive detection methods capable of detecting explosives indirectly in ambient air. The first of the explosive detection methods utilizes a platinum catalyst heated to 350 °C to catalyze the thermal dissociation of nitroaromatic explosives, such as 2,4,6 trinitrotolune …
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Gamma-ray emission from Galactic millisecond pulsars: Implications for dark matter indirect detection
The Fermi Large Area Telescope has observed a gamma-ray excess toward the center of the Galaxy at ~ GeV energies. The spectrum and intensity of the excess are consistent with the annihilation of dark matter with a mass of ~100 GeV and a velocity-averaged cross section of ~ 1e-26 cubic centimeter …
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Automated Detection of Incomplete Exhalation as an Indirect Detection of Auto-PEEP on Mechanically Ventilated Adults
… of this dissertation is to develop an automated detection system of auto-PEEP through incomplete exhalation as revealed by ventilator graphics for mechanically ventilated adults. Auto-PEEP can cause adverse effects if allowed to linger and if not quickly identified. An automated detection system …
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Boosting (in)direct detection of dark matter
In this thesis, I study the expected direct and indirect detection signals of dark matter. More precisely, I study three aspects of dark matter; I use hydrodynamic simulations to extract properties of weakly interacting dark matter that are relevant for both direct and indirect detection signals, …
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Dark Matter Annihilation and the Observed Positron Excess
… dark matter using two different methods: direct detection, in which a WIMP-like particle interacts with a detector in the laboratory, and indirect detection, in which products of dark matter annihilations such as neutrinos, gamma rays, and antimatter are detected. Recent results from two indirect …
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Indirect conductivity detection in size exclusion chromatography of small molecules
… a homogeneous response for all samples. Indirect detection methods have demonstrated to supply an alternative way to obtain a universal, sensitive and mass response in liquid chromatography. This research evaluated the indirect conductivity detection method for the size exclusion …
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Phase-Space Distributions of Galactic Dark Matter Halos and Implications for Detection
… from the Sommerfeld effect is considered in indirect detection; we derive an upper limit on the local velocity dispersion and examine the significance of local anisotropy in the local dark matter distribution in direct detection efforts.</p>
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Galactic Dark Matter
… dark matter necessary for its direct and indirect detection are currently unknown. Since the distributions of normal and dark matter in the Milky Way are coupled to each other as they both move in the same gravitational potential, constraints on the distribution and properties of dark …
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Supersymmetry at the dawn of the LHC era
… and a single photon that could be a striking indirect detection of dark matter if it were seen at gamma-ray telescopes such as FERMI.
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Sensitivity and resolution in 19F and 15N solid-state NMR: applications to pharmaceutical systems
… improvement of solid-state NMR methods for the detection and characterisation of pharmaceutical compound. Chapter 1 reviews the literature that are relevant to the techniques discussed within this thesis Chapter 2 outlines the key experimental techniques employed within this work. Chapter 3 …
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Structure and Local Properties of Dark Matter Halos
… important input variables for both direct and indirect detection experiments. Common assumptions about DM, such as, its particle nature being cold and collisionless–CDM–and its distribution in halos being isothermal and spherical, and well-modeled by an isotopic Maxwell-Boltzmann velocity …
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On effective field theory of dark matter
… for exclusion of such particles by direct and indirect detection. In part~\ref{part:1}, based on ref.~\cite{geytenbeek21}, we introduce a complete basis of operators up to dimension 5 for fermions that are part of singlet, doublet and triplet representation of the Standard Model $SU(2)$ …
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Hot and dark matter
… final state spectrum observed in indirect detection experiments. The "assimilation" reaction efficiently destroy singlet dark matter particles, but dark matter number is stored in new quasi-stable heavy states which carry the baryon asymmetry. The subsequent annihilation and …
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Investigation of optical and imaging characteristics of fluorescent screens for use in digital imaging detectors suitable for telemedicine
Indirect detection digital imaging systems used in medical imaging, compromises powder phosphor scintillators as X-ray to light converters. Powder phosphors should combine image quality and light output parameters in order to produce high quality diagnostic images, with the parallel dose reduction …
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Star Clusters and Dark Matter as Probes of the Spacetime Geometry of Massive Black Holes
… density profile and its applications in the indirect detection of dark matter. We find significant differences from the non-relativistic result of Gondolo and Silk: 1999), including a higher density for the spike and a larger degree of central concentration. Having the dark matter profile …
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Micelle Enhanced Analytical Chemistry
… signal/noise levels and hence lower limits of detection were attained as the concentration of the probe molecule was increased. A detection limit of 9.3 x 10<super>-6</super> M Cu<super>2+</super> was obtained for the system in which NMA was the probe molecule in the presence of 10.0 mM SDS …
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The search for dark matter annihilation in galaxy clusters at VERITAS
… lighter particles including γ-rays. Many direct detection, indirect detection, and direct production schemes have been proposed to search for the elusive WIMP. Galaxy clusters, consisting of hundreds to thousands of galaxies, are the largest collections of matter in the Universe held together by …
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In situ formed magnetic ionic liquids: DNA extraction performance and fluorescence-compatibility in bioanalytical applications
… and their compatibility with fluorescence-based detection methods. Two studies were conducted to address this goal. The first study focused on the DNA extraction efficiency of a new class of MILs using in situ dispersive liquid-liquid microextraction (DLLME) versus conventional DLLME to assess …
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Sphingomyelin as a danger signal in cell-autonomous immunity
… bacterial invasion. One such mechanism involves indirect detection of the pathogen through recognition of pathogen-induced disturbances causing the appearance of specific host molecules in an abnormal location. For example, glycans, which are located on the extracellular leaflet of the plasma …
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