11,371 research outputs found
Tubes Containing String Modules in Symmetric Special Multiserial Algebras
We provide a method for determining the existence and ranks of tubes in the
stable Auslander-Reiten quiver of symmetric special multiserial algebras using
only the information from the underlying Brauer configuration. Essentially, we
generalise the notion of a Green walk around a Brauer graph to the notion of a
Green `hyperwalk' around a Brauer configuration, and show that these walks
determine the number and rank of some of the stable tubes of the corresponding
algebra. This description includes both tame and wild symmetric special
multiserial algebras. We also provide a description of additional rank two
tubes in both tame and wild algebras that do not arise from Green hyperwalks,
but which nevertheless contain string modules at the mouth.Comment: 45 page
The Importance of Transparency and Willingness to Share Personal Information
This study investigates the extent to which individuals are willing to share their sensitive personal information with companies. The study examines whether skepticism can influence willingness to share information. Additionally, it seeks to determine whether transparency can moderate the relationship between skepticism and willingness to share and whether 1) companies perceived motives, 2) individual’s prior privacy violations, 3) individuals’ propensity to take risks, and 4) individuals self-efficacy act as antecedents of skepticism. Partial Least Squares (PLS) regression is used to examine the relationships between all the factors. The findings indicate that skepticism does have a negative impact on willingness to share personal information and that transparency can reduce skepticis
Topological Speedups
Given a dynamical system one can define a speedup of as
another dynamical system conjugate to where
for some function . In
Arnoux, Ornstein, and Weiss showed that any aperiodic, not necessarily ergodic,
measure preserving system is isomorphic to a speedup of any ergodic measure
preserving system. In this paper we study speedups in the topological category.
Specifically, we consider minimal homeomorphisms on Cantor spaces. Our main
theorem gives conditions on when one such system is a speedup of another.
Furthermore, the main theorem serves as a topological analogue of the Arnoux,
Ornstein, and Weiss speedup theorem, as well as a 'one-sided" orbit equivalence
theorem
Linking the Culpability and Circumstantial Evidence Requirements for the Spoliation Inference
Today Real estate companies face the challenge where extensive renovations on existing housing built before 1980 must be performed. Conditions have changed and the housing need performance-‐enhancing measures that meet today's quality. With a current renovation rate, it would take 30 years to meet the renovation needs. The renovation rate must therefore rise dramatically, which requires the real estate companies to act consistently in accordance with commercial principles and in an economically, socially and environmentally responsible way. The paper discusses renovation strategies in four municipal housing companies in the Stockholm suburbs. The report includes surveys of four ongoing renovation projects; Fastighets AB Förvaltaren in Sundbyberg project Hundloken 3, Stiftelsen Signalisten in Solna project Ritorp, Sollentunahem in Sollentuna project Svalgången och Väsbyhem in Upplands Väsby project Dragonvägen. The main purpose of this study was to analyze the practices of redevelopment projects. What opportunities and obstacles arise and how do the housing companies choose to respond to the current societal requirements. How do you work with redevelopment projects and how do you finance these. The purpose of this paper is not to provide a clear and definite conclusion; the basis of the thesis has therefor been case studies. As the needs and conditions vary depending on the renovation project; there are no standard solutions, but there are important issues to be highlighted. It can be noted that the hard part of a renovation project is to get a flow without any barriers, where both the tenant's needs and wishes are taken into account and at the same time it has to be economically and socially reasonable for the companies to implement the great need of renovation. The study indicates to some important questions to have in consideration when renovating; a social responsibility to not stop the ever growing housing queue and a financial responsibility to ensure that the tenant is possible to take on the new rent increase that comes with refurbishment and also reasoning about the grounds on which one should get the right to appeal renovations. The results generated in this report should be seen as a basis for further discussion on the issue.Fastighetsbolag står idag inför utmaningen där omfattande renoveringar på befintliga fastigheter byggda innan 1980-‐talet måste realiseras. Förutsättningarna har ändrats och fastigheterna behöver prestandahöjande åtgärder som möter dagens kvalitet. Med en nuvarande renoveringstakt skulle det ta 30 år att tillgodose renoveringsbehovet. Upprustningstakten måste således öka radikalt, vilket ställer krav på fastighetsbolagen att agera konsekvent enligt affärsmässiga principer och på ett ekonomiskt, socialt och miljömässigt försvarbart sätt. Den här uppsatsen behandlar renoveringsstrategier på fyra kommunala allmännyttiga fastighetsbolag i Stockholmsförorter. Rapporten innefattar undersökningar av fyra pågående renoveringsprojekt; Fastighets AB Förvaltaren i Sundbyberg projekt Hundloken 3, Stiftelsen Signalisten i Solna projekt Ritorp, Sollentunahem i Sollentuna projekt Svalgången och Väsbyhem i Upplands Väsby projekt Dragonvägen. Huvudsyftet med studien har varit att analysera tillvägagångssätt vid ombyggnadsprojekt. Vilka förutsättningar och hinder uppstår och hur väljer man att bemöta de aktuella samhällskraven. Hur arbetar man kring ombyggnadsprojekt och hur finansieras dessa. Avsikten med uppsatsen är inte att lämna någon tydlig och klar slutsats, utgångspunkten i uppsatsen har därför varit fallstudier. Då behov och förutsättningar varierar beroende av renoveringsprojekt finns inga standardlösningar, men däremot finns det viktiga frågor att lyfta fram. Det man kan konstatera är att det svåra i ett renoveringsprojekt, är att få ett flöde utan hinder där såväl hyresgästens behov och önskemål beaktas samtidigt som det för företagen ska vara företagsekonomiskt och samhällsekonomiskt försvarbart att genomföra det stora behovet av upprustningar. Studien indikerar för en del viktiga punkter att tänka på; socialt ansvar att inte stoppa upp den ständigt växande bostadskön och ett ekonomiskt ansvar att se till att det för hyresgästen är möjligt att ta sig an ny hyreshöjning som kommer med renovering samt resonemang kring på vilka grunder man ska få rätten att överklaga renoveringar. Det resultat som uppkommer i rapporten bör ses som underlag för vidare diskussion kring frågan
Low-mass X-ray binaries from black-hole retaining globular clusters
Recent studies suggest that globular clusters (GCs) may retain a substantial
population of stellar-mass black holes (BHs), in contrast to the long-held
belief of a few to zero BHs. We model the population of BH low-mass X-ray
binaries (BH-LMXBs), an ideal observable proxy for elusive single BHs, produced
from a representative group of Milky Way GCs with variable BH populations. We
simulate the formation of BH-binaries in GCs through exchange interactions
between binary and single stars in the company of tens to hundreds of BHs.
Additionally, we consider the impact of the BH population on the rate of
compact binaries undergoing gravitational wave driven mergers. The
characteristics of the BH-LMXB population and binary properties are sensitive
to the GCs structural parameters as well as its unobservable BH population. We
find that GCs retaining BHs produce a galactic population of ejected BH-LMXBs whereas GCs retaining only BHs produce zero
ejected BH-LMXBs. Moreover, we explore the possibility that some of the
presently known BH-LMXBs might have originated in GCs and identify five
candidate systems.Comment: 27 pages, 18 figures, 7 tables, submitted to MNRA
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