Münster University of Applied Sciences

About: Münster University of Applied Sciences is a education organization based out in Münster, Germany. It is known for research contribution in the topics: Luminescence & Laser. The organization has 694 authors who have published 1067 publications receiving 12597 citations.

Temperature dependent optical properties of red emitting Na3GaF6:Mn4+ as a color converter for warm white LEDs

Abstract: Abstract This work presents and disentangles the temperature dependent optical properties of the red-emitting phosphor Na3GaF6:Mn4+. Moreover, crystal field and Racah parameters were investigated. It was proven that the material is suitable for the application in warm white LEDs due to its high quantum yield of about 83%, little thermal quenching of the photoluminescence up to 410 K, high lumen equivalent of about 220 lm/W, and strong absorption at 450 nm. In addition, different DFT approaches were used to investigate its band structure. The calculated data were compared to those obtained experimentally. Red phosphor spectra were calculated to evaluate the suitability of red line-emitting phosphors for the application in warm white emitting pcLEDs. Finally, warm white emitting LEDs comprising Na3GaF6:Mn4+ were constructed in order to show the potential of Na3GaF6:Mn4+ serving as a red component in phosphor blends for future warm white pcLEDs.

Ein Ordnungsrahmen für lebenszyklusorientierte Planung im Facility Management.

Abstract: Facility Management ist eine Managementdisziplin zur strukturierten Planung, Steuerung und Kontrolle aller im Immobilienlebenszyklus anfallenden Prozesse. Im Kontext der zunehmenden Fokussierung auf die gesamten Lebenszykluskosten gewinnt die ganzheitliche und integrative Planung von Sachund Dienstleistungen über alle Lebenszyklusphasen hinweg zunehmend an Bedeutung. Der vorliegende Artikel leistet hierbei anhand eines Ordnungsrahmens einen Beitrag zur modellhaften Visualisierung des gesamten Entwicklungsprozesses des hybriden Produktes in der Domäne des Facility Management und zur Notwendigkeit einer durchgängigen Informationstechnologie-Unterstützung. 1 Ausgangssituation und Problemstellung Die Branche des Facility Management (FM) ist in den vergangenen Jahren kontinuierlich gewachsen [Al03, Mc04, MWW04]. FM ist gleichsam als Oberbegriff zu verstehen für verschiedene personenund insbesondere objektbezogene (bspw. technische. Anlagen, Gebäude) Dienstleistungen [ABS00, Ch04, Se03], die den gesamten Immobilienlebenszyklus, von der Konzeptionierung, über die Planung sowie den Bau, den späteren Betrieb sowie die Revitalisierung/Umnutzung umspannen [Ge04]. Durch die wirtschaftliche Bereitstellung immobilienbezogener Leistungen soll FM die UnternehmensKernprozesse unterstützen. „Hierzu dient die permanente Analyse und Optimierung der kostenrelevanten Vorgänge rund um bauliche und technische Anlagen und im Unternehmen erbrachte (Dienst-) Leistungen, die nicht zum Kerngeschäft gehören.“ [Ge04] Durch den kausalen Zusammenhang zwischen Bauund Baufolgekosten (Nutzungskosten) einer Immobilie ergibt sich eine lebenszyklusorientierte Betrachtung, wobei die gebäudeund servicebezogenen Kosten ein Vielfaches der eigentlichen Investitionssumme betragen [Tr92]. Dabei wird ein Großteil der späteren Nutzungskosten innerhalb der Planung von Immobilien durch die Wahl von technischen Komponenten, Raumfunktionalitäten, etc. determiniert und zum Teil irreversibel manifestiert [Of03, Pe06, RNB05]. Vor diesem Hintergrund gewinnt der Gedanke der integrativen Planung von Immobilien über alle Lebenszyklusphasen hinweg sowie die homogene Zusammenführung einzelner Produkte

Prescribing and medical non-adherence after myocardial infarction: qualitative interviews with general practitioners in Germany

Abstract: An increasing prevalence of having survived a myocardial infarction increases the importance of medical secondary prevention. Although preventive medication reduces mortality, prescribing and adherence are known to be frequently insufficient. General practitioners are the most important prescriber. However, their perspective on prescribing and medical non-adherence following myocardial infarction has not yet been explored. Thus, the aim of this study was to explore the general practitioners’ perspective on long-term care after myocardial infarction focussing on medical prevention. In this qualitative interview study we conducted episodic interviews with sixteen general practitioners from rural and urban surgeries in Germany. Framework analysis with focus on general practitioners’ prescribing and patients’ non-adherence was performed. Almost all general practitioners reported following guidelines for myocardial infarction aftercare and prescribing the medication that was initiated in the hospital; however, they described deviating from guidelines because of drugs’ side effects or patients’ intolerances. Some questioned the benefits of medical secondary prevention for the oldest of patients. General practitioners perceived good adherence among their patients who had had an MI while they regarded their methods for assessing medical non-adherence as limited. They perceived diverse reasons for non-adherence, particularly side effects, patients’ freedom from symptoms and patients’ indifference to health. They attributed mainly negative characteristics, like lack of knowledge and understanding, to non-adherent patients. These characteristics contribute to the difficulty of convincing these patients to take medications as prescribed. General practitioners improved adherence by preventing side effects, explaining the medication’s necessity, facilitating intake and involving patients in decision-making. However, about half of the general practitioners reported threatening their patients with negative consequences of non-adherence. General practitioners should be aware that discharge medication can be insufficient and thus, should always check hospital recommendations for accordance with guideline recommendations. Improving physicians’ communication skills and informing and motivating patients in an adequate manner, for example in simple language, should be an important goal in the hospital and the general practitioner setting. General practitioners should assess patients’ motivations through motivational interviewing, which no general practitioner mentioned during the interviews, and talk with them about adherence and long-term treatment goals regularly.