Mixed collective states of many spins

Mixed states of samples of spin s particles which are symmetric under permutations of the particles are described in terms of their total collective spin quantum numbers. We use this description to analyze the influence on spin squeezing due to imperfect initial state preparation.Comment: Section V on extension of the results to atoms with more than two levels has been rewritten. Accepted for publication in Phys. Rev.

Thermal spin injection and interface insensitivity in permalloy/aluminum metallic non-local spin valves

We present measurements of thermal and electrical spin injection in nanoscale metallic non-local spin valve (NLSV) structures. Informed by measurements of the Seebeck coefficient and thermal conductivity of representative films made using a micromachined Si-N thermal isolation platform, we use simple analytical and finite element thermal models to determine limits on the thermal gradient driving thermal spin injection and calculate the spin dependent Seebeck coefficient to be $-0.5\ \mu\mathrm{V}/\mathrm{K}< S_{s}<-1.3\ \mu\mathrm{V}/\mathrm{K}$. This is comparable in terms of the fraction of the absolute Seebeck coefficient to previous results, despite dramatically smaller electrical spin injection signals. Since the small electrical spin signals are likely caused by interfacial effects, we conclude that thermal spin injection is less sensitive to the FM/NM interface, and possibly benefits from a layer of oxidized ferromagnet, which further stimulates interest in thermal spin injection for applications in sensors and pure spin current sources

Designing Software Services for Business Agility

This presentation focuses on identifying the right services for a domain. The work is based on 10+ years of experience from StatoilHydro identifying and building services that are stable and useful for many years, even across technology shifts. By focusing on workflows with their activities, events and information usage, a set of reusable services can be identified through little effort (espescially if the workflows already exists) and built/composed from existing services. This approach is especially suitable for agile development practices, as it significantly reduces the amount of up-front analysis compared to traditional service design practices

Beitrag zur Lehre von der Amputation des Penis wegen Carcinom

Thesen: I.: Bei tiefer Amputation des Penis, ausgeführt an jugendlichen Männern, ist es ein Werk der Humanität die Kastration sofort anzuschliessen. II. Zum Zweck der Untersuchung bei Prostatahypertrophie soll man sich zuerst stets des elastischen Katheters bedienen. III. Bei Amputation des Penis sind stets die Inguinaldrüsen zu exstirpieren

A Review of Lean and the Lean Implementation in Statoil

Master's thesis in Industrial economicsThe oil and gas industry is in a situation where changes are required to remain competitive. Lean has proven to be a successful mean to improve companies worldwide, which is why there has been a growing interest in Lean among the oil and gas companies in the past few years. The corporate management in Statoil decided to use Lean as a way of working to reach the goal of a continuous improvement culture. This thesis provides a detailed literature study on Lean. The literature study includes historic background of Lean, Lean principles, Lean tools, and a presentation of Lean implementation with some potential challenges. This can be found in section 2.1. Lean has traditionally been applied to typical, repetitive production systems, while this thesis focus on how Lean can be used in other contexts. How Lean has been used in projects and project management is the example which is presented in this thesis in section 2.2. The presentation of Lean in projects is done through comparison of traditional project management and Lean project management, where a few examples have been included to illustrate the effects of Lean. The last part of the literature study presents a brief overview of oil and gas industry, which can be found in section 2.3. This part is included as a courtesy to the reader to get a better understanding of the industry, which is useful further in the thesis. The objective of the thesis is to discuss the Lean implementation process in Statoil, as well as how Lean can be used as a way of working in the company. The discussion is conducted in chapter 4. Through interviews and the literature study, issues have been addresses such as limitations and challenges. An extra focus has been on discussing Statoil’s relation with contractors. Potential improvement areas have also been identified, along with how Lean tools can be used in Statoil. The Lean implementation process has been thoroughly reviewed, addressing both advantages and disadvantages. Furthermore, the new roadmap for digitalization in Statoil have been put in the context of Lean. Maintaining a focus on Lean in Statoil along with a continuous improvement culture is the final topic discussed in this thesis, along with how Lean can assist Statoil in preparing for the future