Design and Characterization of Electrospun Polyamide Nanofiber Media for Air Filtration Applications

Electrospun polyamide 6 (PA 6) and polyamide 6/6 (PA 6/6) nanofibers were produced in order to investigate their experimental characteristics with the goal of obtaining filtration relevant fiber media. The experimental design model of each PA nanofibers contained the following variables: polymer concentration, ratio of solvents, nanofiber media collection time, tip-to-collector distance, and the deposition voltage. The average diameter of the fibers, their morphology, basis weight, thickness, and resulting media solidity were investigated. Effects of each variable on the essential characteristics of PA 6/6 and PA 6 nanofiber media were studied. The comparative analysis of the obtained PA 6/6 and PA 6 nanofiber characteristics revealed that PA 6/6 had higher potential to be used in filtration applications. Based on the experimental results, the graphical representation—response surfaces—for obtaining nanofiber media with the desirable fiber diameter and basis weight characteristics were derived. Based on the modelling results the nanofiber filter media (mats) were fabricated. Filtration results revealed that nanofiber filter media electrospun from PA6/6 8% (w/vol) solutions with the smallest fiber diameters (62–66 nm) had the highest filtration efficiency (PA6/6_30 = 84.9–90.9%) and the highest quality factor (PA6/6_10 = 0.0486–0.0749 Pa−1)

The unified enterprise modelling language – Overview and further Work

ISBN 978-1-1234-7890-2/08International audienceThe Unified Enterprise Modelling Language (UEML) aims to support integrated use of enterprise and IS models expressed in a variety of languages. The achieve this aim, UEML provides a hub through which different languages can be connected, thereby paving the way for connecting the models expressed in those languages. UEML offers a structured approach to describing enterprise and IS modelling constructs, a common ontology to interrelate construct descriptions at the semantic level, a correspondence analysis approach to estimate semantic construct similarity, a quality framework to aid selection of languages, a meta-meta model to organise the UEML and a set of tools to aid its use. This paper presents an overview of UEML and points to paths for further work

The Unified Enterprise Modelling Language – Overview and further work

International audienceThe Unified Enterprise Modelling Language (UEML) aims at supporting integrated use of enterprise and IS models expressed using different languages. To achieve this aim, UEML offers a hub through which modelling languages can be connected, thereby paving the way for also connecting the models expressed in those languages. This paper motivates and presents the most central parts of the UEML approach: a structured path to describing enterprise and IS modelling constructs; a common ontology to interrelate construct descriptions at the semantic level; a correspondence analysis approach to estimate semantic construct similarity; a quality framework to aid selection of languages; a meta-meta model to integrate the different parts of the approach; and a set of tools to aid its use and evolution. The paper also discusses the benefits of UEML and points to paths for further work

From Pentecost to 'inner healing': religious change and Pentecostal developments in the post-socialist Lithuanian Catholic milieu

In this article the author describes the religious change that took place in the Catholic milieu of post-Soviet Lithuania. Following the arrival of global Pentecostal trends to the country a Catholic form of Pentecostalism, known as Catholic Charismatic Renewal (CCR) also arrived. The author describes what changes the CCR brought and how the Pentecostal developments paved the way for this other movement to emerge. Dynamic developments of the CCR unexpectedly took a turn towards the discourse and practice of healing, which triggered the emergence of another movement, known as the Inner Healing Movement (IHM). Being inseparable from its Pentecostal roots the movement, nevertheless, has become a vernacular, specifically Catholic, practice which no longer seeks for the signs of Pentecostal authenticity but redefines the Pentecostal message, directing it towards healing discourses and practices.

Blockchain-based Application Security Risks: A Systematic Literature Review

Although the blockchain-based applications are considered to be less vulnerable due to the nature of the distributed ledger, they did not become the silver bullet with respect to securing the information against different security risks. In this paper, we present a literature review on the security risks that can be mitigated by introducing the blockchain technology, and on the security risks that are identified in the blockchain-based applications. In addition, we highlight the application and technology domains where these security risks are observed. The results of this study could be seen as a preliminary checklist of security risks when implementing blockchain-based applications.Comment: 12 pages, 7 tables, 0 figure

Security Requirements Elicitation from Airline Turnaround Processes

Security risk management is an important part of system development. Given that a majority of modern organizations rely heavily on information systems, security plays a big part in ensuring smooth operations of business processes. For example, many people rely on e-services offered by banks and medical establishments. Inadequate security measures in information systems have unwanted effects on an organization’s reputation and on people’s lives. This case study paper targets the secure system development problem by suggesting the application of security requirements elicitation from business processes (SREBP). This approach provides business analysts with means to elicit and introduce security requirements to business processes through the application of the security risk-oriented patterns (SRPs). These patterns help find security risk occurrences in business processes and present mitigations for these risks. At the same time, they reduce the efforts needed for risk analysis. In this paper, the authors report their experience to derive security requirements for mitigating security risks in the distributed airline turnaround Systems

Arbeidsmiljø og Kreativitet. Beskrivende Studie av Arbeidsmiljø og Kreativitet i H. Mydland AS

Denne masteroppgaven omhandler arbeidsmiljø og kreativitet i H. Mydland AS. Studiet beskriver ansattes oppfatning av ulike arbeidsmiljøforhold som har betydning for kreativitet. Hensikten med denne studien er å kartlegge arbeidsmiljøfaktorer som påvirker kreativitet i H. Mydland as. En ide om en god match mellom ansatt og dens arbeidsplass er et av hovedmålene i organisasjonspsykologi. Det å generere og implementere nye ideer, finne bedre måter å gjøre ting på, drive med produkt- og tjenesteutvikling, gå i takt med kunnskap og teknologiutvikling er viktige suksessfaktorer som har betydning for organisasjoners resultater og verdiskapning totalt sett. Som følge av globalisering, stadig økende realiseringsbehov og fokus på egen utvikling blant de ansatte, har fokuset på arbeidsmiljø økt betraktelig i de fleste organisasjoner verden rundt. I dagens verden blir menneskelige ressurser en betydelig garanti for organisasjonens effektive ytelse som også bidrar til at organisasjoner oppnår sine mål. Derfor er det nødvendig å være særlig oppmerksom på menneskelige ressurser og trivsel for ansatte. Det antas at jobbtrivsel, helse og yteevne er de viktige psykososiale arbeidsmiljøfaktorene som har betydning for individuell kreativitet. Først og fremst handler det om indre motivasjon som stimuleres av det sosiale miljøet. Faktorer som autonomi, støtte, forutsigbarhet og betydning i arbeidet, optimal utfordring på jobb, oppgave interesser er sentrale for ansattes indre motivasjon som videre påvirker kreativitet. Mange gjennomførte undersøkelser viser at faktoren positive utfordringer på jobben er den mest utslagsgivende for kreativitet. Høy skåre på utfordringer gir et arbeidsmiljø preget av høy indre motivasjon, arbeidsglede og en tilfredsstillende følelse av mening med det man gjør