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592 Uppsatser om Radiation resistance - Sida 1 av 40

Strålskydd :

This paper describes how radiation affects the body, the somatic and genetic effect that can occure in exposure of ionizing radiation and how to protect yourself against it. How radiation affects the cells and why you can get cancer if you get exposed of a large amount of radiation is mentioned. Research after a threshold is mentioned and what Sweden does today to improve the radiation protection by laws and regulations. Explaining the atom, what radiation is and how the ionizing radation interacts with the atom. How backscatter affect the picture and the workers and how to protect yourself from backscatter is mentioned. Radiation doses, dosimetry and rules for those who practise radiation is shortly described..

An image-based method for identification of new inhibitors of Signal Transducer Activator of Transcription 1

Background: Chemotherapy and Radiation resistance are major causes of failure in cancer treatment. The response to treatment in cancer cells depends on several mechanisms and pathways such as Janus kinases-signal transducers and activators of transcription JAK/STAT pathway. STAT1 was the first described transcription factor in the STAT family. STAT1 is activated by stimulation of signaling proteins such as type II interferon (IFN- ?) and the activated STAT1 translocates from cytoplasm to nucleus.

Motstånd vid förändring av ekonomisystem - utifrån institutionell teori

The purpose of this study is, on the basis of institutional theory, to contribute with moreunderstanding about resistance to management accounting change and also to survey reasonsfor the resistance and how to cope with the resistance.The study is a qualitative case study and semi-structured interviews have been used tocomplement the study?s theoretical area, consisting of scientific articles.The conclusion from the study is that resistance to management accounting change can beunderstood and explained by the institutions of each organisation and its underlying structures. Afurther conclusion is, with the structures in mind there are many reasons for resistance and alsomany ways to cope with the resistance. A model has been produced in purpose to createunderstanding and to survey the resistance to management accounting change..

Påverkan på elektronik och sensorer i radiologisk miljö

The objective of this thesis is to make a training material for KSU, which shows how radiation affects the different electronic components in a radiological environment.All electronic systems in the presence of high ionizing radiation can experience difficulties and be destroyed.This influence may compromise the control system and thus the safety of a nuclear reactor plant.To achieve this objective requires a description of electronic components and sensors, to better understand its function.This thesis will also show the possible solutions available that the author found interesting.Organizations such as NASA, CERN and ESA have worked to develop electronic components immune to radiation. Those organizations have also developed a test protocol that guarantees to a certain extent the security of electronic components in a radiological environment.Since we know how the material reacts with the radiation, it could develop a material that can be resistant to radiation or like CMOS technology has proposed, to reduce the component to avoid the storage of charge in the oxide.Another solution can be the GRAPHENE. Its features will revolutionize the electronics and provide answer to the radiation problems, Graphene will replace Silicium and the electronic components will only have a few nanometers dimensions so the oxide area also reduces, and in this way avoid the known problem of storage of charge..

Mätutrustning för kosmisk strålning

The purpose with this examination is to build a measureequipment to AerotechTelub AB (AT), who will registrate fault in SRAM-memory in contact with cosmic radiation. The equipment will be created around developcard from Memec Design with FPGA from Xilinx. The logic in the FPGA will be implemented with the hardwaredescribed language VHDL. The SRAM-memory that will be tested is build in CMOS-teknologi. The memorycells will be loaded with a predecided bitpattern.

Cancerbehandling för hund och katt

Cancer is one of the most feared diseases in veterinary medicine today, and the incidence is higher than ever due to the fact that our companion animals live longer then they did ten to twenty years ago. Cancer is also one of the most common causes of mortality in older companion animals. This literature review will be about two of the currently most common form of cancer treatment of companion animals in Swedish animal hospitals, chemotherapy and radiation therapy. There will also be a section of general nursing care for cancer patients. The section of chemotherapy will describe the indications for choosing chemotherapy, the way to administrate chemotherapeutic drugs, describe specific chemotherapeutic drugs, potential side effects of chemotherapy, and how to handle and store chemotherapeutic drugs safely. The section of radiation therapy will describe the current devices for delivering radiation therapy, describe the indications for choosing radiation therapy and describe potential side effects that radiation therapy may cause.

Förbättrad resistansmätning för grova aluminiumledare

The goal with this master thesis has been to evaluate and to examine the stationary resistance bridge. The resistance bridge uses a 4-point measuring to determinate the resistance, which is used in the manufacturing of the conductor. It is then used when the resistance is to be decided for coarser aluminium conductors. A conductor has to fulfil certain demands to be able to move forward in the process. One of these demands is the resistance in ohm/km, which has demands that the measure values of the resistance bridge are as true and precise as possible.

Förbättrad resistansmätning för grova aluminiumledare

The goal with this master thesis has been to evaluate and to examine the stationary resistance bridge. The resistance bridge uses a 4-point measuring to determinate the resistance, which is used in the manufacturing of the conductor. It is then used when the resistance is to be decided for coarser aluminium conductors. A conductor has to fulfil certain demands to be able to move forward in the process. One of these demands is the resistance in ohm/km, which has demands that the measure values of the resistance bridge are as true and precise as possible. The stationary resistance bridge had been examined through various kinds of measurements to be able to see how stable the system is and how to obtain a measure value as optimized as possible.

MCNP-modell för beräkning av neutrondos och DPA på reaktortanken vid Ringhals 2

In this report an MCNP (Monte Carlo N-Particle) model is described for the reactor vessel at Ringhals 2. The model is validated against the specific activity in neutron dosimeters, extracted in 1977, 1984 and 1994. The validation showed that the calculations of the model are within the requirements of a maximum of 20 percent uncertainty for every neutron dosimeter except one, extracted after the first cycle. The uncertainty of this cycle was mostly due to the operation data rather than to the MCNP model.The model has been used to investigate various questions concerning radiation damage. The reliability of the traditional measure of radiation damage, fast neutron flux (En > 1MeV) has been evaluated.  This has been done by taking the ratio for this and another measure of radiation damage, DPA (Displacement Per Atom), for various positions and layers.

If there is violence, there is resistance.

This thesis is a discourse analysis of six rape trials, with the intention to analyze how the plaintiffs?? resistance is described. The overall aim is to investigate whether there are forms of resistance that the courts find more desirable and if there are any rules for how resistance should manifest itself. I will also investigate how the rape is itself described by the plaintiff and courts, respectively. I will analyze how this affects the understanding and attitude toward what has happened.

Motstånd - inte tröst. En studie om förståelsen av motståndsbegreppet

Based on hermeneutic tradition, the goal of this thesis is to further my understanding of what the concept of resistance means in a psychoanalytical context today, primarily within clinical practice. My methodology has been to seek an understanding of the concept of resistance by reading excerpts from the original texts of Sigmund Freud, as well as conducting interviews with practicing psychoanalysts that focus on how they relate to the notion of resistance. The idea was to then present my understanding of these sources in relation to one another. The results suggest that an understanding of the concept of resistance in a clinical context is highlighted by a dichotomy between theory and practice..

Behovet av blyhandskar som skydd mot sekundärstrålning vid röntgenundersökning av djur

X-rays are a potential risk for animal health care personnel. The present study will examine the risks for scattered radiation to the personnel, if no lead gloves are used when holding an animal during the x-ray examination. Furthermore, how the impact of the exposure values and body parts examined, affect the scattered dose to the hands of the holder. Also, the distance between the animal and the hand that holds it was evaluated to see the impact on scattered radiation exposure. Tested by a survey, to animal health care students, the frequency of the usage of lead gloves in Swedish animal hospitals was studied. According to the results from the analysis, animal health care personnel don't need to use lead gloves every time they hold an animal or a cassette during x-ray examinations.

Sjukdomsresistens eller sjukdomstolerans inom husdjursaveln - en jämförelse

Tolerance and resistance are two different defence mechanisms within the immune system that differ from each other in many ways: However it is not clear which of the two is the most advantageous in dairy production. Resistance is described as the ability to fight a pathogen in a host. Tolerance is, on the other hand, not aggressive to the pathogen per se, but rather protects the host and its tissues. Furthermore tolerance rather offsets the toxin from, for example, a parasite whilst resistance offsets the parasite itself. Resistance is however disease specific, which means breeding for a large number of diseases is needed in order to make resistance worth the cost for the host.

Gotlands solelpotential

The aim of this thesis is to investigate the electric solar potential on the Swedish island Gotland. The Gotlandic habitations have been divided into four house categories. For each category energy demand, roof area, geographic orientation androof tilt have been decided. Solar radiation data have been collected from the Swedish solar radiation model STRÅNG (STRÅNG, 2012).The buildings characteristics and the solar radiation have been used as input values in common solar formulas, the solar potential for each building category have been summed up to a total electric solar potential for the region.The electric solar potential on Gotland was calculated to 242 GWh/year with solar data from 2010. Gotlands largest city, Visby, is marked as cultural heritage by UNESCO (UNESCO, 2012).

Strålbehandling på hund och katt :

Jönköping Small Animal Hospital is today the only clinic in Sweden to offer radiation therapy as a treatment of tumours. The body contains of billions of cells that all have to obey the regulations that are established. If a cell is exposed to a harmful substance, for example a chemical, it can be transformed into a tumourcell. Normally the body has a good defence but the tumourcell can survive and start to divide unrestrained. A tumour is starting to develop.

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