Hybride Bibliothek – eine Begriffsneubestimmung

Bislang wurde das aus dem angelsächsischen Kulturraum stammende Konzept ‚Hybrid-Bibliothek‘ reduziert auf die Informationsversorgung und -angebote, die sowohl traditionell-materieller als auch zukunftsorientiert-elektronischer Art sind. Jedoch begründet meiner Meinung nach folgende Argumentationskette eine inhaltliche Erweiterung beziehungsweise Neuverortung des Begriffs Hybride Bibliothek

„... eine Investition in die Zukunft ...“

Jede(r) fünfte Berliner(in) ist mittlerweile nicht-deutscher Herkunft. In den Innenstadtbezirken ist der Anteil der Kinder mit Migrationshintergrund höher als 70 %. Der Zugang zum Arbeitsmarkt wird Zuwanderern und deren Nachkommen aufgrund schlechter Schulabschlüsse und einer geringeren Ausbildungsbeteiligung, vor allem aber aufgrund mangelnder Deutschkenntnisse, erheblich erschwert. Menschen mit Migrationshintergrund können aufgrund ihrer ökonomischen Möglichkeiten am kulturellen und aufgrund ihres rechtlichen Status am gesellschaftspolitischen Stadtleben nur bedingt partizipieren. Im Übrigen ist Berlin ein Spiegel für gesamtdeutsche Verhältnisse

Enhancement of optical properties of Lu3Al5O12:Ce3+ and Ca-alpha-SiAlON:Eu2+ by quinine sulphate

Up to now, luminescence properties of Eu2+-activated Ca-alpha-Sialon (Ca-alpha-Sialon:Eu2+) and Ce3+-doped lutetium aluminium garnet (LuAG:Ce3+) have been widely studied in free or encapsulated forms in polymeric matrices individually. On the other hand, quinine sulphate (QS), which has been accepted as a "quantum yield standard" for the fluorescence spectroscopy due to the excellent emission performance, has also been investigated many times, for different purposes. In this work, we studied excitation and emission behaviour of quinine sulphate-phosphor blends consisting of Ca-alpha-Sialon:Eu2+/QS and LuAG:Ce3+/QS in polymethyl methacrylate matrix for the first time. The Ca-alpha-Sialon exhibited approximately 44% increase in the emission intensity when encapsulated along with the Quinine sulphate in the solid state. Similarly, the LuAG:Ce3+ exhibited 98% increased brightness when used in QS containing PMMA matrix. Decay time measurements performed in nanosecond and microsecond time scales supported a potential energy transfer from the QS to the phosphors. The promising results obtained in this study may open a cost-effective way to enhance the optical performance of the both phosphors, which are basic materials for the fabrication of LED bulbs, smartphone and televisions screens, monitors, and panels of other electronic devices

LU3AL5O12:CE3+ VE CA-Α-SIALON:EU2+ OPTİK ÖZELLİKLERİNİN KİNİN SÜLFATLA ARTTIRILMASI

LU3AL5O12:CE3+ VE CA-Α-SIALON:EU2+ OPTİK ÖZELLİKLERİNİN KİNİN SÜLFATLA ARTTIRILMASIUtku ULUCAN, Kadriye ERTEKİN, Sibel OĞUZLARTürkiyeÖz: Bugüne kadar Eu2+ doplu Ca-α-Sialon ve Ce3+ doplanmış LuAG: Ce3+ polimerik matris içerisinde geniş bir şekilde çalışılmıştır. Diğer yanda Kinin Sülfat kuantuum verimi standartı olarak kullanılmıştır ve ayrıca çok iyi emisyon performansı olduğu için başka amaçlar içinde oldukça çalışılmıştır. Bu çalışmada ise , ilk kez Ca-α-Sialon: Eu2+/QS ve LuAG: Ce3+/QS fosforlarının polimetil metakrilat (PMMA) matris içersindeki eksitasyon ve emisyon davranışlarını inceliyeceğiz. Ca-α-Sialon: Eu2+ % 44 emisyon intensity artışı göstermiştir. Benzer olarak LuAG: Ce3+ Kinin sülfat karışımı ise % 98 parlaklık artışını PMMA matriste göstermiştir. Buda kinin sülfatın fosforlarla etkileşime girerk onların emisyon vede eksitasyon özelliklerinin en iyi şekilde arttırdığını göstermiştir. Kinin sülfat LuAG: Ce3+ ve Ca-α-Sialon'nun en iyi şekilde floresans özelliklerinin arttırmış ve onlardan çok daha iyi bir eksitasyon ve emisyon pikleri almamızı sağlamıştır.Decay time ölçümlei mikro ve nano saniye cinsinden yapılmıştır ve Kinin Sülfatla fosforlar arasındaki potansiyel enerji transferleri araştırılmıştır. Decay time ölçümlerinde kinin sülfatla kullanılan fosforlar arsında aktarılan enerji transferinin fosforlar kinin sülfat içerisinde arttırıldıkça kademeli olarak arttığı görülmüştür. Bu çalışma sayesinde maliyeti düşürülerek ampüllerde, televizyon ekranlarında, monitörlerde, akıllı telefonlarda ve elektronik aletlerin panellerinde görüntünün iyileştirilmesi sağlanmaya çalışılmıştır. Bu çalışmada genel olarak kinin Sülfatın fosforlarla etkileşime girip enerji transferleri sayesinde eksitasyon ve emisyon piklerini arttırdığını gözlemlemiş olduk.Anahtar Kelimeler: Ca-α-Sialon: Eu2+, LuAG: Ce3+, Kinin Sülfat, Floresans</p

Demographics of patients with heart failure who were over 80 years old and were admitted to the cardiology clinics in Turkey

WOS: 000468584300005PubMed ID: 30930455Objective: Heart failure (HF) has a high prevalence and mortality rate in elderly patients; however, there are few studies that have focused on patients older than 80 years. The aim of this study is to describe and compare the age-specific demographics and clinical features of Turkish elderly patients with HF who were admitted to cardiology clinics. Methods: The Epidemiology of Cardiovascular Disease in Elderly Turkish population (ELDER-TURK) study was conducted in 73 centers in Turkey, and it recruited a total of 5694 patients aged 65 years or older. In this study, the clinical profile of the patients who were aged 80 years or older and those between 65 and 79 years with HF were described and compared based on the ejection fraction (EF)-related classification: HFrEF and HFpEF (is considered as EF: >= 50%). Results: A total of 1098 patients (male, 47.5%; mean age, 83.5 +/- 3.1 years) aged 80 years and 4596 patients (male, 50.2 %; mean age, 71.1 +/- 4.31 years) aged 65-79 years were enrolled in this study. The prevalence of HF was 39.8% for patients who were >= 80 years and 27.1% for patients 65-79 years old. For patients aged >= 80 years with HF, the prevalence rate was 67% for hypertension (HT), 25.6% for diabetes mellitus (DM), 54.3% for coronary artery disease (CAD), and 42.3% for atrial fibrilation. Female proportion was lower in the HFrEF group (p=0.019). The prevalence of HT and DM was higher in the HFpEF group (p= 80 years with HFrEF (p<0.01). Conclusion: HF is common in elderly Turkish population, and its frequency increases significantly with age. Females, diabetics, and hypertensives are more likely to have HFpEF, whereas CAD patients are more likely to have HFrEF.Turkish Society of CardiologyThis study was supported by Turkish Society of Cardiology

Demographics of patients with heart failure who were over 80 years old and were admitted to the cardiology clinics in Turkey

Objective: Heart failure (HF) has a high prevalence and mortality rate in elderly patients; however, there are few studies that have focused on patients older than 80 years. The aim of this study is to describe and compare the age-specific demographics and clinical features of Turkish elderly patients with HF who were admitted to cardiology clinics. Methods: The Epidemiology of Cardiovascular Disease in Elderly Turkish population (ELDER-TURK) study was conducted in 73 centers in Turkey, and it recruited a total of 5694 patients aged 65 years or older. In this study, the clinical profile of the patients who were aged 80 years or older and those between 65 and 79 years with HF were described and compared based on the ejection fraction (EF)-related classification: HFrEF and HFpEF (is considered as EF: >= 50\%). Results: A total of 1098 patients (male, 47.5\%; mean age, 83.5 +/- 3.1 years) aged 80 years and 4596 patients (male, 50.2 \%; mean age, 71.1 +/- 4.31 years) aged 65-79 years were enrolled in this study. The prevalence of HF was 39.8\% for patients who were >= 80 years and 27.1\% for patients 65-79 years old. For patients aged >= 80 years with HF, the prevalence rate was 67\% for hypertension (HT), 25.6\% for diabetes mellitus (DM), 54.3\% for coronary artery disease (CAD), and 42.3\% for atrial fibrilation. Female proportion was lower in the HFrEF group (p=0.019). The prevalence of HT and DM was higher in the HFpEF group (p<0.01), whereas CAD had a higher prevalence in the HFrEF group (p=0.02). Among patients aged 65-79 years, 43.9\% (548) had HFpEF, and 56.1\% (700) had HFrEF. In this group of patients aged 65-79 years with HFrEF, the prevalence of DM was significantly higher than in patients aged >= 80 years with HFrEF (p<0.01). Conclusion: HF is common in elderly Turkish population, and its frequency increases significantly with age. Females, diabetics, and hypertensives are more likely to have HFpEF, whereas CAD patients are more likely to have HFrEF