Essays about: "Hole geometry"

Showing result 1 - 5 of 17 essays containing the words Hole geometry.

1. 1. Gravitational Collapse of a Massless Scalar Field in a Theory of Minimally Modified Gravity

   University essay from KTH/Fysik

   Author : Atabak Fathe Jalali; [2024]
   Keywords : Theoretical physics; astrophysics; modified gravity; minimally modified gravity; gravitational collapse; VCDM; scalar collapse; apparent horizon; numerical relativity; Teoretisk fysik; astrofysik; modifierad gravitation; minimalt modifierad gravitation; gravitationskollaps; VCDM; skalär kollaps; uppenbar horisont; numerisk relativitet;

   Abstract : This thesis explores the spherically symmetric gravitational collapse of a massless scalar field in a minimally modified gravity theory denoted VCDM (V replaces $\Lambda$ in the $\Lambda$CDM abbreviation), a class of theories propagating the same degrees of freedom as general relativity at the expense of broken 4D diffeomorphism invariance. Numerical evolution of the equations of motion reveals that for small initial scalar profile amplitudes, no black hole forms from the collapse. READ MORE

3. 2. Plastic deformation of hot riveted joints acting in shear

   University essay from KTH/Bro- och stålbyggnad

   Author : Victor Gard; [2023]
   Keywords : ;

   Abstract : A popular way to maintain old rivet connections is to reuse the old connection and replace the old rivets with high grade steel bolts. In doing so the behavior of the joint can change due to the new geometry, where a gap between the new bolt and the rivet hole emerges. READ MORE

4. 3. A comparative study on hole quality criteria on CFRP drilling

   University essay from Lunds universitet/Industriell Produktion

   Author : Jerome Paul Raenius Jeevanandham; Sakthivel Balaji; [2021]
   Keywords : CFRP; Composites; Hole quality; Delamination; Uncut fibers; Technology and Engineering;

   Abstract : Drilling is an essential hole-making operation in the modern industrial world. Drilling operation is comparatively challenging in composites when compared to metals. Composites are heterogeneous and possess a high strength-to-weight ratio which makes it a challenge in composite drilling. READ MORE

5. 4. Quantum structure of holographic black holes

   University essay from KTH/Fysik

   Author : Elias Riedel Gårding; [2020]
   Keywords : BTZ spacetime; black hole; wormhole; AdS CFT; holographic renormalisation; analytic continuation; Bogolyubov transformation; QFT in curved spacetime; BTZ-rumtid; svart hål; maskhål; AdS CFT; holografisk renormering; analytisk fortsättning; Bogolyubov-transformation; kvanfältsteori i krökt rumtid;

   Abstract : We study a free quantum scalar field in the BTZ spacetime as a model of the AdS/CFT correspondence for black holes, and show the essential steps in computing Bogolyubov coefficients between modes on either side of the wormhole. As background, we review the BTZ geometry in standard, Kruskal and Poincaré coordinates, holographic renormalisation of the dual field theory and canonical quantisation in curved spacetime. READ MORE

6. 5. FEASIBILITY STUDY: THE REDUCTION OF DEFECTIVE HOLES IN PLASTIC FLOORING MANUFACTURING

   University essay from Blekinge Tekniska Högskola/Institutionen för maskinteknik

   Author : Anton Senbom; [2020]
   Keywords : ;

   Abstract : Defects are a common phenomenon related to the manufacturing of products in industries and unavoidable to a full degree. Companies can manage or mitigate risks relating to manufacturing through standardization in processes, methods, and quality checks. READ MORE