Search results for "Computer"

Reverse Catmull-Clark Subdivision

2006

Reverse subdivision consists in constructing a coarse mesh of a model from a finer mesh of this same model. In this paper, we give formulas for reverse Catmull-Clark subdivision. These formulas allow the constructing of a coarse mesh for almost all meshes. The condition for being able to apply these formulas is that the mesh to be reversed must be generated by the subdivision of a coarse mesh. Except for this condition, the mesh can be arbitrary. Vertices can be regular or extraordinary and the mesh itself can be arbitrary (triangular, quadrilateral…).

Ositusmetodit reaaliaikaisessa renderöinnissä

2017

Tietokonegrafiikka ja siihen liittyvät menetelmät ovat nopeasti kehittyvä tutkimuksen ala. Tämän tutkimuksen tavoitteena on pohtia eri ositusmenetelmien toimintaa reaaliaikaisessa käytössä sekä vertailla näitä menetelmiä. Nykyaikaiselle käytölle tehokkaimmaksi osoittautui kolmesta tutkitusta menetelmästä tuorein (Brainerd ym. 2016). Tulevassa tutkimuksessa laitteistointegraatioon keskittyminen voisi tuoda ositusmenetelmät nopeammin kuluttajien saataville. Computergraphicsanditsmethodsarearapidlydevelopingfieldinresearch.The purpose of this study is to discuss and compare the functionality of several subdivision methods in real-time use. The latest of the three studied methods turned out to be…

Étude d'un système de stéréo-vision hybride

2013

National audience; On considère dans ce travail un système de vision hybride fixe composé d'une caméra fisheye et d'une caméra PTZ dans un environnement rigide. Nous souhaitons être en mesure d'orienter la caméra mécanisée sur une cible visible depuis l'image omnidirectionnelle de manière à obtenir une image de bonne définition de l'objet d'intérêt à partir de la caméra PTZ. Nous proposons dans cet article d'utiliser la modélisation sphérique des images ainsi que les propriétés de la géométrie épipolaire afin d'initialiser la localisation de la cible dans la caméra PTZ.

Rethinking gender and technology within intersections in the Global South

2019

This introduction presents an overview of the key concepts discussed in the subsequent chapters of this book. The book examines mobile technology use in the Global South through the lens of intersectional understandings of power. It explores the integration of mobile phones in the lives of women from Gishu County in Kenya, and the meanings and symbolism attributed to this technology. The book deals with the material-feminist concept of social reproduction to understand the deepening precarity of the urban poor in Tanzania and their gendered responses to it. It explains the concept of young men’s financial inclusion linked to the proliferation of mobile money in Uganda. The book discusses th…

Attacking TrustZone on devices lacking memory protection

2021

AbstractARM TrustZone offers a Trusted Execution Environment (TEE) embedded into the processor cores. Some vendors offer ARM modules that do not fully comply with TrustZone specifications, which may lead to vulnerabilities in the system. In this paper, we present a DMA attack tutorial from the insecure world onto the secure world, and the design and implementation of this attack in a real insecure hardware.

Towards Automated Classification of Firmware Images and Identification of Embedded Devices

2017

Part 4: Operating System and Firmware Security; International audience; Embedded systems, as opposed to traditional computers, bring an incredible diversity. The number of devices manufactured is constantly increasing and each has a dedicated software, commonly known as firmware. Full firmware images are often delivered as multiple releases, correcting bugs and vulnerabilities, or adding new features. Unfortunately, there is no centralized or standardized firmware distribution mechanism. It is therefore difficult to track which vendor or device a firmware package belongs to, or to identify which firmware version is used in deployed embedded devices. At the same time, discovering devices tha…

Koeteltavien markkinoiden teoria ja tietokonevarausjärjestelmät : miksi teorian oletukset eivät toteudu Yhdysvaltain sisäisessä reittilentoliikentees…

1997

Surrogate Modelling for Oxygen Uptake Prediction Using LSTM Neural Network

2023

Oxygen uptake (V˙O2) is an important metric in any exercise test including walking and running. It can be measured using portable spirometers or metabolic analyzers. Those devices are, however, not suitable for constant use by consumers due to their costs, difficulty of operation and their intervening in the physical integrity of their users. Therefore, it is important to develop approaches for the indirect estimation of V˙O2-based measurements of motion parameters, heart rate data and application-specific measurements from consumer-grade sensors. Typically, these approaches are based on linear regression models or neural networks. This study investigates how motion data contribute to V˙O2 …

Synchronizing Two Superconducting Qubits through a Dissipating Resonator

2021

A system consisting of two qubits and a resonator is considered in the presence of different sources of noise, bringing to light the possibility of making the two qubits evolve in a synchronized way. A direct qubit–qubit interaction turns out to be a crucial ingredient, as well as the dissipation processes involving the resonator. The detrimental role of the local dephasing of the qubits is also taken into account.

DEEP TISSUE MASSAGE AND FLEXIBILITY IN THE STRUCTURAL COMPONENTS OF THE SUPERFICIAL BACK LINE OF PROFESSIONAL VOLLEYBALL PLAYERS: A PILOT STUDY

2019

Background: Massage is a common treatment in physiotherapy, often used as a prophylaxis or during recovery following a musculoskeletal contusion. One form of therapeutic massage is deep tissue massage (DTM), which has become more popular in recent years as a way of performing targeted work with the myofascial system. Aim of the study: The aim of the study was to examine the effectiveness of deep tissue massage on superficial back line flexibility (hip flexion and knee extension range of motion - ROM). Material and methods: Elite volleyball players (n=15), age: 22.8 ± 4.41 years; mass: 82.67 ± 6.99 kg; height: 1.96 ± 0.08 m) were recruited for this study. Deep tissue massage of the myofascia…