Sökresultat

Filtyp

Din sökning på "*" gav 548845 sökträffar

Neural Network Approaches To Survival Analysis

Popular Abstract in Swedish Denna avhandling behandlar artificiella neuron nätverk och deras applikation inom medicin. Den utgår ifrån att det är viktigt att kunna uppskatta en patients överlevnadschanser för att kunna erbjuda rätt behandling för olika former av cancer. Generellt kan man säga att ju värre prognos desto mer omfattande behandling behöver man sätta in. Vissa patienter kan botas med ePredicting the probable survival for a patient can be very challenging for many diseases. In many forms of cancer, the choice of treatment can be directly impacted by the estimated risk for the patient. This thesis explores different methods to predict the patient's survival chances using artificial neural networks (ANN). ANN is a machine learning technique inspired by how neurons in the brain fu

Aktuella behandlingsprinciper vid pseudocystor i pankreas. Ultraljud och datortomografi har revolutionerat handläggningen

Pancreatic pseudocysts often complicate the course of both acute and chronic pancreatitis. The management, if the pseudocysts are symptomatic, still remains a substantial clinical problem. Surgical drainage was prior to the introduction of ultrasound and CT more or less the treatment of choice. A vide variety of other treatments have, however, been described that aim to achieve at least as good sh

MORAXELLA CATARRHALIS OUTER MEMBRANE PROTEINS AND THEIR INTERACTIONS WITH THE HUMAN HOST

Moraxella catarrhalis is an airway pathogen whose role in infection has been increasingly recognized in recent years. Most authorities in this field now agree that M. catarrhalis causes significant morbidity and is not just a harmless commensal. The universal prevalence of BRO ?-lactamases in this pathogen is a serious concern. In addition, M. catarrhalis may be further propelled into a more promi

Development and psychometric testing of the Visual Analogue Scale for Irritable Bowel Syndrome (VAS-IBS).

Background: The aim of this study was to develop and psychometrically test a short, patient-reported questionnaire to be used in clinical practice for patients with Irritable Bowel Syndrome (IBS). The Visual Analogue Scale for Irritable Bowel Syndrome (VAS-IBS) questionnaire was designed to measure the treatment response of symptoms and well-being in patients suffering from IBS. Methods: The VAS-I

The potential of proton beam radiation therapy in prostate cancer, other urological cancers and gynaecological cancers

A group of Swedish oncologists and hospital physicists have estimated the number of patients in Sweden suitable for proton beam therapy. The estimations have been based on current statistics of tumour incidence, number of patients potentially eligible for radiation treatment, scientific support from clinical trials and model dose planning studies and knowledge of the dose-response relations of dif

Leaching of concrete : the leaching process and its effects

Popular Abstract in Swedish Avhandlingen presenterar en experimentell studie av urlakning av betong orsakat av vatten som tränger igenom betongen, eller av diffusion av joner till vatten på uppströmssidan. Urlakningsförloppet och dess effekter modelleras med finita-element-metoden.The present report presents an experimental study of leaching of concrete caused by water percolating through the concrete, or by diffusion from concrete to external water in contact. An apparatus was designed and constructed in which de-ionised water could be forced, by external pressure, through a number of concrete specimens of differing characteristics. It was found that, whereas the initial w

Molecular effects in solid NaNO3 observed by x-ray absorption and resonant Auger spectroscopy

X-ray absorption and resonant Auger spectroscopy were used to study the formation and decay of nitrogen and oxygen core excitations in ionic-molecular solid NaNO3. It has been shown that the most prominent features in the electronic structure of both valence and conduction bands of the NaNO3 crystal are determined by molecular states of the quasi-isolated NO3- group. In the Auger decay following t

Observation potential of the decays B0s,d → J/ψη

The observation potential of the decays B0s,d → J/ψη with the ATLAS detector at the LHC is described in this paper. At present there exist only upper limits for the branching fractions, but at LHC, a clear signal for the decay mode B0s,d → J/ψη is expected. The branching fraction of this decay mode can thus be measured, and other parameters such as B0s lifetime can be measured as well. The decay m