Technische Universität Berlin

7285 Items

Recent Submissions
Determining the Growth and Vitality of Micro-Organisms in Carpets and Mattresses in Non-Problem Dwellings by Measuring CO2 Released during Respiration

Kemp, Peter ; Neumeister-Kemp, Heike ; Koch, C. ; Lysek, Gernot ; Murray, Frank (2002)

Bedroom carpets and mattresses devoid of any reported or observed moisture damage or problems were analysed as sources of indoor fungal growth by determining the amount of CO2 released from respiration by micro-organisms living in furnishings. Dust was extracted from the carpets and mattresses using a Kirby G5 vacuum cleaner. The basal respiration rate of the dust samples without moisture added...

Exercise Increases the Plasma Antioxidant Capacity of Adolescent Athletes

Carlsohn, Anja ; Rohn, Sascha ; Bittmann, Frank ; Raila, Jens ; Mayer, Frank ; Schweigert, Florian (2008)

Background: The reactive oxygen species produced as a result of exercise might exceed an individual’s antioxidant defence system. Various endogenous antioxidants are elevated in adult athletes, resulting in an improved antioxidant capacity. However, little is known about antioxidant defence in adolescents. The purpose of this study was to examine presumed adaptations of antioxidant capacity in ...

Anxiety Symptoms in Spouses of Stroke Patients

Wilz, Gabriele ; Kalytta, Tanja (2008)

Background: The aim of this longitudinal study was to investigate prevalence rates of anxiety symptoms in stroke patients’ spouses and associated factors. Methods: Data were collected from 114 couples upon the patients’ admission for rehabilitation as well as 1 year later and analysed with linear regression analyses. The Beck Anxiety Inventory was used to assess anxiety symptoms. Results: The r...

Automated Analysis of Eye Tracking Movements

Ruetsche, Adrian ; Baumann, Ann ; Jiang, Xiaoyi ; Mojon, Daniel (2003)

Objective: To present a quick algorithm to automatically analyze the raw data acquired by a photo-oculography (POG) system. Methods: We developed a simple algorithm for POG data analysis based on an extrapolation of missing values due to blinking and on exclusion of outliers using the robust mean and standard deviation. Results: POG curves of 4 children aged between 1.5 and 7 years are shown be...

Alternating current loss measurement of power cable conductors with large cross sections using electrical methods

Suchantke, René (2018)

High voltage power cables for bulk AC power transport use the Milliken conductor design from a certain cross section up to decrease transmission losses. It is not possible to reliably assess their AC losses by simulation or other calculation methods in advance, as the performance of this complex design strongly depends on manufacturing processes and quality. The exact knowledge of the AC resist...

Urban planning practice under neo-customary land tenure

Akaateba, Millicent Awialie (2018)

Contemporary discourses on land policy in sub-Saharan African countries have shifted from polarised debates that hitherto promoted formal land administration or romanticised customary tenure systems. Recent policy trends have emphasised the integration of customary and state tenure systems as a nascent strategy to achieve equitable land delivery. Conceptually embedded in the exploratory concept...

Compositional alterations of petroleum as a result of expulsion and migration in the North Sea Central Graben petroleum system

Ziegs, Volker (2018)

The Mandal Formation, the principal source rock in the well-explored North Sea Central Graben, has been identified as a locally very inefficient expeller of its generated products, although having charged numerous petroleum accumulations in that basin. This unusual behaviour for marine shales makes the Mandal Formation an interesting natural laboratory to re-assess the factors controlling gener...

Wideband GaN microwave power amplifiers with class-G supply modulation

Wolff, Nikolai (2018)

The continuous and rapidly growing demand for mobile communication access led worldwide to a major increase in the number of base stations to provide the sufficient coverage and quality of service. As a consequence, mobile communication networks have become a significant contributor to the worldwide energy consumption. The necessity to save operational cost and the increased energy awareness fu...

Influence of network structure on the crystallization behavior in chemically crosslinked hydrogels

Zhang, Zhenfang ; Li, Qian ; Yesildag, Cigdem ; Bartsch, Christoph ; Zhang, Xiaoyuan ; Liu, Wei ; Loebus, Axel ; Su, Zhiqiang ; Lensen, Marga C. (2018-09-01)

The network structure of hydrogels is a vital factor to determine their physical properties. Two network structures within hydrogels based on eight-arm star-shaped poly(ethylene glycol)(8PEG) have been obtained; the distinction between the two depends on the way in which the macromonomers were crosslinked: either by (i) commonly-used photo-initiated chain-growth polymerization (8PEG–UV), or (ii...

Quality and resource efficiency in hospital service provision: A geoadditive stochastic frontier analysis of stroke quality of care in Germany

Pross, Christoph ; Strumann, Christoph ; Geissler, Alexander ; Herwartz, Helmut ; Klein, Nadja (2018-09-06)

We specify a Bayesian, geoadditive Stochastic Frontier Analysis (SFA) model to assess hospital performance along the dimensions of resources and quality of stroke care in German hospitals. With 1,100 annual observations and data from 2006 to 2013 and risk-adjusted patient volume as output, we introduce a production function that captures quality, resource inputs, hospital inefficiency determina...

An X-ray tomographic study of rechargeable Zn/MnO2 batteries

Osenberg, Markus ; Manke, Ingo ; Hilger, André ; Kardjilov, Nikolay ; Banhart, John (2018-08-21)

We present non-destructive and non-invasive in operando X-ray tomographic investigations of the charge and discharge behavior of rechargeable alkaline-manganese (RAM) batteries (Zn-MnO2 batteries). Changes in the three-dimensional structure of the zinc anode and the MnO2 cathode material after several charge/discharge cycles were analyzed. Battery discharge leads to a decrease in the zinc parti...

Datenmanagementpläne leicht gemacht: TUB-DMP, das Web-Tool der TU Berlin für Datenmanagementpläne

Kuberek, Monika ; Fürste, Fabian (2018)

Das Web-Tool TUB-DMP ist ein weiterer Baustein in der Forschungsdaten-Infrastruktur der Technischen Universität Berlin, die vom „Servicezentrum Forschungsdaten und -publikationen“ (SZF) betrieben wird. TUB-DMP ergänzt das Repositorium für Forschungsdaten und Publikationen „Deposit-Once“, das die langfristige Verfügbarkeit, Verifizierung, Zitierbarkeit und Nachnutzbarkeit der Forschungsergebniss...

Leitlinie? Grundsätze? Policy? Richtlinie?

Hiemenz, Bea ; Kuberek, Monika (2018)

Die Anzahl der Forschungsdaten-Policies an deutschen Universitäten ist seit 2014 deutlich gestiegen und die Kurve geht kontinuierlich nach oben. Eine Besonderheit der deutschen Policies ist auf den ersten Blick ersichtlich: Es gibt keine einheitliche Bezeichnung – verwendet werden „Leitlinie“, „Grundsätze“, „Policy“, „Richtlinie“. Auch zeigen die Policies deutliche Unterschiede auf, was Umfang ...

Sicher in der Cloud – Best Practice Sicherheitskonzept

Kuberek, Monika (2017)

Cloudbasierte Bibliothekssysteme, die als Software as a Service von einem externen IT-Dienstleister betrieben werden, stellen das Bibliotheksmanagement vor neue Herausforderungen – vor allem im Hinblick auf die Gewährleistung von Datenschutz und Datensicherheit. Insbesondere die Risiken hinsichtlich Vertraulichkeit, Verfügbarkeit und Integrität der zu schützenden Daten sind andere als bei den h...

Die Forschungsdaten-Infrastruktur der TU Berlin

Kuberek, Monika (2013)

Um den Wissenschaftlerinnen und Wissenschaftlern ein dauerhaftes, zukunftsorientiertes Angebot im Umgang mit ihren Forschungsdaten zur Verfügung zu stellen, wird seit September 2012 eine Forschungsdaten-Infrastruktur an der TU Berlin aufgebaut. Sie soll die langfristige Sicherung und Verfügbarkeit der hier entstandenen Forschungsdaten und der darauf basierenden Forschungspublikationen gewährlei...

Development of recombinant oncolytic Coxsackievirus B3 for treatment of colorectal carcinoma

Hazini, Ahmet (2018)

Colorectal cancer is one of the most death related cancer type in worldwide. Conventional cancer therapeutics show curable effect only in the patients at early stage of the disease. In case of the diagnosis at late stages, the survival rate decreases dramatically up to 10%. Therefore, novel cancer therapeutics are urgently needed. Oncolytic virotherapy is a new treatment approach which exploits...

Eskalation – Dynamiken der Gewalt im Kontext der G20-Proteste in Hamburg 2017

(2018)

Die Gewalt um den G20-Gipfel wird in Hamburg auch ein gutes Jahr nach den Ereignissen noch kontrovers diskutiert. Wie konnte ein Gipfelprotest in Unruhen mit breiter Beteiligung übergehen? Warum lag bei Polizeimaßnahmen die Schwelle zur Gewalt so niedrig? Der Bericht „Eskalation. Dynamiken der Gewalt im Kontext der G20-Proteste in Hamburg 2017“, der am 6. September veröffentlicht wird, will die...

Entwicklung einer autark operierenden Plug-and-Play-Einzelphotonenemittereinheit

Schlehahn, Alexander (2018)

Durch die stetige Entwicklung von Anwendungsmöglichkeiten der Quantentechnologie steigt auch die Nachfrage nach effizienten und qualitativ hochwertigen Quellen einzelner Photonen, welche den Grundstein vieler dieser praktischen Konzepte bilden. Daher wird im Rahmen dieser Arbeit die Entwicklung einer kältemittelunabhängigen, fasergekoppelten Einzelphotonenemittereinheit, basierend auf InGaAs-Qu...

Was (nicht) prägte. Carls von Diebitschs kurze Jahre an der Berliner Bauakademie

Nägelke, Hans-Dieter (2017)

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Managing cloud ecosystems

Slawik, Mathias (2018)

In recent years, the ever-growing proliferation of cloud services led to the creation of large cloud ecosystems. The most prominent example is the cloud ecosystem of Amazon Web Services (AWS), which now has over 8,000 partners and more than $ 18 billion in revenue in 2017. In addition to these "giants", many smaller ecosystems address more specific challenges. An example is the TRESOR cloud eco...