Controlled nonuniformity in macroporous silicon pore growth

Photoelectrochemical etching of uniform prestructured silicon wafers in hydrofluoric acid containing solutions yields periodic structures that can be applied to two- and three-dimensional photonic crystals or microfluidics. Here we demonstrate experimentally macroporous silicon etching initiated by a nonuniform predefined lattice. For conveniently chosen parameters we observe a stable growth of pores whose geometrical appearance depends strongly on the spatially different nucleation conditions. Moreover, we show preliminary results on three-dimensionally shaped pores. This material can be used to realize hybrid photonic crystal structures and incorporate waveguides in three-dimensional photonic crystals

Об'єкти управління підприємством як соціально-економічною системою

Проведено аналіз сутності, функцій, видів підприємств як економічної категорії, систематизовано об’єкти дослідження за теоріями підприємств та визначено, що ними є процес управління потенціалом підприємства за формами організації бізнесу та технологією партнерських взаємовідносин

The Role of Sunk Costs in Digitalization – Empirical Evidence from Accounting and Finance

IT investments are researched in theory and practice from different theoretical perspectives. In accounting and finance, corporate practice in particular shows that large IT investments are either not made or are abandoned during the investment and implementation process. In our view, the economic role of sunk costs has not been given sufficient attention in the literature to date. From a theoretical point of view, the objective or subjective assumption of sunk costs could be a barrier against the adoption of new digital technologies. This paper can partly support this thesis on the basis of empirical data

Draft genome sequence of strain B 225, an iron-depositing isolate of the genus Novosphingobium

Here, we report the draft genome sequence of Novosphingobium sp. strain B 225, an iron-depositing bacterium isolated from a phenazone-amended naturally grown biofilm. This biofilm was grown in the Unteres Odertal National Park, Germany. Illumina NextSeq sequencing was used to determine the genome of the strain.DFG, 325093850, Open Access Publizieren 2017 - 2018 / Technische Universität Berli

Draft Genome Sequence of Ideonella sp. Strain A 288, Isolated from an Iron-Precipitating Biofilm

Here, we report the draft genome sequence of the betaproteobacterium Ideonella sp. strain A_228. This isolate, obtained from a bog iron ore-containing floodplain area in Germany, provides valuable information about the genetic diversity of neutrophilic iron-depositing bacteria. The Illumina NextSeq technique was used to sequence the draft genome sequence of the strain.BMBF, 02WU0715, Verbundprojekt: Entwicklung eines Indikatorsystems für Verockerungsprozesse - Teilprojekt 1: Untersuchung der Biofilme der Oder-Auen: Diversität und umweltbiotechnologisches Potenzial; Teilprojekt 3: Klärung des Abbaus persistenter organischer Schadstoffe bei mikrobiellen Prozesse

Comparison of clinical characteristics of influenza and respiratory syncytial virus infection in hospitalised children and adolescents

While significant morbidity due to respiratory syncytial virus (RSV) infection in the paediatric population has been well acknowledged, little is known about the burden of influenza in primarily healthy children in Europe. In our institution, a University Children's Hospital in Switzerland, medical staff were encouraged to take nasopharyngeal specimens for multiplex polymerase chain reaction assays for influenza A and B, RSV and several other pathogens from patients hospitalised with respiratory symptoms. We took advantage of this strategy and performed a retrospective study to compare specific characteristics of influenza virus infections with those of RSV during two consecutive winter seasons. Overall, 126 patients were positive for RSV and 60 patients were positive for influenza (type A: 45; type B: 15). The median age of children with RSV, influenza A, and influenza B infection was 4 months; 2 years and 4 months; and 6 years and 2 months, respectively (P<0.001). Fever and cough predominated in children with influenza infection whereas cough, rhinorrhoea, feeding difficulties and dyspnoea were the major symptoms in children with RSV infection. Of patients with influenza, 41% suffered from lower respiratory tract infection compared to 91% of those with RSV infection (P<0.001). Of 60 patients hospitalised with influenza, 12 (20%) experienced febrile convulsions. None of the patients with influenza had been immunised in the respective winter season, although 27% of them had at least one underlying medical condition that would have counted as an indication for immunisation in Switzerland. Conclusion: influenza virus infections, like respiratory syncytial virus infections, are a major cause of hospitalisation in children with respiratory illness during the winter season. Since it is impossible to make an aetiological diagnosis on clinical grounds, it is important to apply specific diagnostic tools in children hospitalised with respiratory illness in order to better characterise the relative burden of disease caused by the respective agent