12 results on '"Röder, M."'
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2. Der mit dem Falken jagt
- Author
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Roeder, M.
- Published
- 2016
3. Wohlige Wärme
- Author
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Röder, M.
- Published
- 2015
4. Öfen für Keramik und Kalk
- Author
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Biermann, E. and Röder, M.
- Published
- 2014
5. Experimentelle Modellierung von Stranggussprozessen mit niedrig schmelzenden Legierungen
- Author
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Timmel, K., Wondrak, T., Röder, M., Shevchenko, N., Miao, X., Stefani, F., and Eckert, S.
- Subjects
Zweiphasenströmung ,Stranggießen ,Flüssigmetallmodell ,Strömungsmessung ,elektromagnetische Strömungsbeeinflussung - Abstract
Die Strömung der Metallschmalze beim kontinuierlichen Stranggießen hat wesentlichen Einfluss auf das erreichte Gussergebnis. Probleme entstehen beispielsweise durch Einschlüsse von Oxiden, intermetallischen Verbindungen oder Gasblasen, die durch eine unkontrollierte Strömung in die Erstarrungszone gelangen. Die Untersuchung und Optimierung der Strömungsvorgänge erfolgte bisher vorwiegend anhand von numerischen Simulationen sowie Wassermodellen und lieferte bereits viele Erkenntnisse. Aufgrund der Materialeigenschaften sind jedoch Wassermodelle in ihrer Anwendung begrenzt und können nicht alle im Prozess auftretende physikalische Phänomene abdecken, wie z.B. Temperaturgradienten in der Schmelze, Interaktion mit elektromagnetischen Feldern oder Mehrphasenströmungen. In diesen Fällen unterscheiden sich die Kennzahlen z.T. um mehrere Größenordnungen. Am Helmholtz-Zentrum Dresden-Rossendorf stehen drei Anlagen zur Verfügung, welche sich mit der Modellierung des Stranggussprozesses unter der Verwendung niedrigschmelzender Legierungen befassen. Die Anlagen unterscheiden sich z.T. in der Ausrichtung ihrer Untersuchungsschwerpunkte und ergänzen sich so gegenseitig ideal. Das Mini-LIMMCAST Experiment arbeitet mit einer bei Raumtemperatur flüssigen Legierung und ist sehr flexibel aufgebaut. Viele unterschiedliche Untersuchungen können und sind hier bereits durchgeführt worden. Die große LIMMCAST-Anlage ist insbesondere für einen längeren kontinuierlichen Betrieb ausgelegt und operiert im Temperaturbereich von 200 – 350 °C. Die dritte Anlage X-LIMMCAST ist speziell für die Röntgenbildgebung und die Visualisierung der Zweiphasenströmung mit Gasblasen konzipiert. Die Flexibilität der Anlagen erlaubt eine Anpassung an konkrete Gegebenheiten. Neben den experimentellen Anlagen müssen für einen sinnvollen Betrieb auch entsprechende Messtechniken zu Erfassung der Strömungsvorgänge in flüssigen Metallen zur Verfügung stehen. Für die Geschwindigkeitsmessung sind dazu in den Versuchen die Ultraschall-Doppler-Velocimetry, die kontaktlose, induktive Strömungstomographie und die Potentialsondenmethode zum Einsatz gekommen. Für die Auflösung der Zweiphasenströmung sind wiederum eine tomographische Methode als auch die Röntgenbildgebung verwendet worden. Ziel ist neben einem tieferen Verständnis des Prozesses, die Bereitstellung eine breiteren Datenbasis für die Validierung numerischer Modelle. Es sollen in diesem Beitrag die drei Versuchsanlagen und ausgewählte Messtechniken beispielhaft anhand von Messergebnissen vorgestellt werden.
- Published
- 2015
6. Elektromagnetische Strömungskontrolle lokaler Temperaturgradienten in einem Modell des Czochralski-Prozesses
- Author
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Cramer, A., Röder, M., Pal, J., and Gerbeth, G.
- Abstract
Die Gestalt der Kristallisationsfront und das damit verbundene monokristalline Wachstum im Czochralski-Kristallzuchtprozess hängt stark vom Verhältnis zwischen horizontalem und vertikalem Temperaturgradienten r*=deltaT_h/deltaT_v an der Schnittstelle zwischen Schmelze, Kristall und Atmosphäre ab. Der Wert von r* liegt dabei idealerweise in der Nähe von 1. Deshalb wurde ein Flüssigmetall-Modellexperiment aufgebaut, das die Untersuchung von r* unter dem Einfluss von Magnetfel-dern ermöglicht. Das zylindrische Flüssigmetallvolumen wird dabei homogen von unten geheizt, und um den wachsenden Kristall zu simulieren wird die Wärme oben konzentrisch mit einem Kühler entzogen, der die Oberfläche nur bis zu einem Drittel des Radius bedeckt. Ohne Strömungskontrolle findet sich ein von der Zielfunktion weit entfernter Wert von r*=3. Das Ziel r*=1 kann durch elektromagnetische Strömungsbeeinflussung erreicht werden.
- Published
- 2010
7. Soziale Sicherheit braucht Sozialmedizin Selbstverständnis von Ärztinnen und Ärzten in der sozialmedizinischen Begutachtung und Beratung.
- Author
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Nüchtern, E., Bahemann, A., Egdmann, W., van Essen, J., Gostomzyk, J., Hemmrich, K., Manegold, B., Müller, B., Robra, B. P., Röder, M., Schmidt, L., Zobel, A., and von Mittelstaedt, G.
- Published
- 2015
- Full Text
- View/download PDF
8. [Autonomy and Participation As Common Goals of Nursing, Therapy and Social Medicine: Proposal for an Organizational Configuration Model on the Basis of Service Blueprinting].
- Author
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Herold-Majumdar A, Alex C, Gerber H, Penz M, Röder M, Mittelstaedt GV, and Behrens J
- Subjects
- Aged, Germany, Goals, Humans, Models, Organizational, Quality of Life, Nursing, Social Medicine
- Abstract
Background: Every person who is in the need of long-term care (according to German Social Code SGB XI §14) fulfills the requirements of disability according to German Social Code SGB IX, § 2. The right of participation and autonomy must be specially protected and realized for persons with long-term care needs because these persons have a limited capacity to advance their interests. The rights of people in the need of long-term care or assistance are protected not only by the national constitution but also by the UN Disability Rights Convention. Participation is an important principle of these extra-statutory regulations and has an extraordinary significance and individual meaning for quality of life. For concretizing the aim of participation and for realizing participation in daily practice, the following question arises: How must organizations be configured to achieve individual aims of participation for persons with long-term care need, complex health care needs and with potential for rehabilitation across sectoral, disciplinary and professional borders? This analysis focuses on people older than 70 years with geriatric-relevant multimorbidity and with potential for rehabilitation., Aim: The aim of this study was to create a configuration model for the organization of interdisciplinary cooperation in rehabilitation out of a case study and on the basis of the service blueprinting method [1]. In a next step this configuration model can be evaluated concerning its effectiveness for achieving individual participation goals and quality of life of persons with long-term care need and with potential for rehabilitation., Method: For creating the configuration model, the service blueprinting method [1] on the basis of Dervin's sense making theory [11] was applied to a case vignette of geriatric rehabilitation against a background of organization theories and nursing science concepts. With the case study the configuration model can be applied exemplarily at the setting of restorative care, therapy and rehabilitation. With the service blueprinting method, the rehabilitation process is aligned onto the geriatric patient's individual health care needs, perceptions of participation and quality of life., Results: As a result of the sequencing and service blueprinting process we offer a dynamic model for the coordination of responsibility of interdisciplinary rehabilitation teams with a user-centered alignment. Its effectiveness (and side-effects) for interdisciplinary cooperation and for patient's individual goals of participation and quality of life must be evaluated in further studies. A mixed-method design should be used to evaluate objective outcome parameters such as dependency on nursing care, hospital admission rates and subjective outcome parameters such as patient's perception of participation, autonomy and quality of life., Implications for Healthcare Practice: The configuration model can be used for evaluating already implemented geriatric rehabilitation processes and organizations. The configuration model can be used in health care research or organizational research. After more evidence for desirable effects, it can be implemented into the health care system. Side effects should be monitored.This paper was written in cooperation with the working group "Nursing", department "Practical Social Medicine and Rehabilitation" of the German Society of Social Medicine and Prevention (Deutsche Gesellschaft für Sozialmedizin und Prävention DGSMP e.V.)., Competing Interests: Die Autoren geben an, dass kein Interessenkonflikt besteht., (© Georg Thieme Verlag KG Stuttgart · New York.)
- Published
- 2020
- Full Text
- View/download PDF
9. [Social Medicine and Interfaces in Sectoral Health Care Provision].
- Author
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Gerber H, Alex C, Penz M, Röder M, and von Mittelstaedt G
- Subjects
- Germany, Delivery of Health Care, Social Medicine
- Abstract
In addition to the consideration of individual medicine, social medicine focuses on the social references of health and sickness. In this context, it reflects the structures of the entire health care system, its functions and its functional deficits. It deals with the specific interaction between medicine and society and functions such as a link to the classical social sciences (1). Of particular interest in this context are the interfaces to sectoral health care provision. The working group "Nursing Care" of the Department "Practical Social Medicine and Rehabilitation" of the German Society for Social Medicine and Prevention examines the fundamental interfaces in our sectoral health care system from the perspective of social medicine in their current functions and perspectives, particularly in view of the future demographic challenges to be faced. Of particular importance is the interface between medicinal and nursing care in the areas of acute inpatient and homecare as well as in the area of geriatric care, including preventive measures. The aim of this article is to start a discussion on this subject., Competing Interests: Die Autoren geben an, dass kein Interessenkonflikt besteht., (© Georg Thieme Verlag KG Stuttgart · New York.)
- Published
- 2018
- Full Text
- View/download PDF
10. [Allergen analysis].
- Author
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Röder M and Weber W
- Subjects
- Allergens classification, Consumer Product Safety legislation & jurisprudence, Food Analysis methods, Germany, Government Regulation, Humans, Allergens analysis, Food Analysis standards, Food Hypersensitivity prevention & control, Food Industry legislation & jurisprudence, Food Labeling legislation & jurisprudence, Food Safety methods
- Abstract
The fundamental requirement when testing for and ensuring compliance with legally required labelling regulations is the reliable analysis of food allergens. This can be carried out by means of either DNA (deoxyribonucleic acid) or protein detection. Protein detection has the advantage of directly detecting the allergenic component and can currently be carried out using immunological (enzyme-linked immunosorbent assay [ELISA])/lateral flow devices [LFD]) or mass spectrometry-based techniques. DNA detection is indirect, but allows the presence of food allergens to be validated through the use of another marker. Each method has its pros and cons, which have to be considered on a case-by-case basis. ELISA is quantitative, quick and easy to carry out and has high sensitivity. LFD testing is ideal for industrial applications, as the tests can be carried out on-site. Both antibody-based tests may have problems with processed foods and false positive results. Mass-spectrometric techniques show a lot of promise, but are currently still time-consuming and complex to carry out. They also run into problems with processed foods and their degree of sensitivity is matrix and parameter dependent. For these reasons, this technique is only occasionally used. Polymerase chain reaction (PCR) provides the highest specificity and, depending on the target sequence, a very good to good level of sensitivity. Despite the high stability of DNA, PCR is still subject to the influence of processing and matrix related factors. Due to natural variation and production-related changes in the structures relevant in the process of detection, all methods exhibit a relatively high level of uncertainty of measurement. At present, there is no method which provides the absolute correct quantification. However, by means of laboratory-based analyses it is possible to calibrate for the allergen in question and thus be able to make reliable measurements using methods that are already available.
- Published
- 2016
- Full Text
- View/download PDF
11. [Allergen management in the food industry].
- Author
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Röder M and Weber W
- Subjects
- Allergens classification, Consumer Product Safety legislation & jurisprudence, Food Analysis methods, Food Safety methods, Germany, Guidelines as Topic, Humans, Allergens analysis, Consumer Product Safety standards, Food Analysis standards, Food Hypersensitivity prevention & control, Food Industry standards, Food Labeling standards
- Abstract
Due to the lack of causative immunotherapies, individuals with food allergies have to rely on correct labelling for even minute amounts of allergenic constituents. It is not relevant to the allergic whether the source of the culprit food is an ingredient or an allergen that entered the food unintentionally, as is the case with so-called cross-contacts or hidden allergens.Efficient allergen management is the manufacturer's prerequisite for coping with allergenic foods in the food production environment and handling them in a way that avoids cross-contact. If it is technically not feasible to eliminate cross-contacts entirely, it must be ensured that these cross-contacts do not enter the final product without being detected.This article discusses measures that should be considered in allergen management. Examples include recording all relevant allergens in the production facility, staff sensitization and training, and taking into account all areas of production from incoming raw materials to outgoing goods.For the evaluation of unavoidable cross-contacts, it is possible today to draw on data from clinical trials for many of the substances that are subject to labelling. This data can be used to assess the risk of the final product.However, the data from threshold studies is not legally binding, so it is left to the manufacturer to assess the level up to which the food is safe for the allergic. In particular the non-harmonized approach of the EU member countries' food safety authorities currently represents a major obstacle, as this can lead to food recalls even though existing levels were evaluated as being safe according to the risk assessments performed.
- Published
- 2016
- Full Text
- View/download PDF
12. [Social Security Needs Social Medicine: Self-image of Physicians Practicing Social Medicine in Statutory Health Insurances and Social Security Systems].
- Author
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Nüchtern E, Bahemann A, Egdmann W, van Essen J, Gostomzyk J, Hemmrich K, Manegold B, Müller B, Robra BP, Röder M, Schmidt L, Zobel A, and von Mittelstaedt G
- Subjects
- Delivery of Health Care statistics & numerical data, Germany, Attitude of Health Personnel, National Health Programs statistics & numerical data, Needs Assessment, Physicians statistics & numerical data, Social Medicine statistics & numerical data, Social Security statistics & numerical data
- Abstract
Objective: In January, 2014, the division "Social Medicine in Practice and Rehabilitation" of the German Society for Social Medicine and Prevention established a working group on the self-image of the physicians active in the field of social medicine (medical expertise and counseling)., Methods: The result of this work is the contribution presented here after consensus was achieved by specialists of social medicine from different fields and institutions (social security etc.) and in good cooperation with Prof. Dr. Gostomzyk and Prof. Dr. Robra., Results: Based on the importance of an up to date social medicine for claimants and recipients of benefits on the one hand and the social security system on the other, and also on a description of the subjects, objectives and methods the following aspects are presented: · The perspective of social medicine. · Qualification in social medicine, concerning specialist training and continuing medical education. · The fields of duty of experts in social medicine. · The proceedings in social medicine. The working group identified challenges for the specialists in social medicine by a narrowed perception of social medicine by physicians in hospitals and practice, accompanied by an enlarged importance of expertise in social medicine, by the demand for more "patient orientation" and gain of transparency, and concerning the scientific foundation of social medicine., Conclusions: The working group postulates: · The perspective of social medicine should be spread more widely.. · Confidence in experts of social medicine and their independency should be strengthened.. · The not case-related consulting of the staff and executives should be expanded.. · Social medicine in practice needs support by politics and society, and especially by research and teaching.. · Good cooperation and transfer of experiences of the different branches of social security are essential for the impact of social medicine.., (© Georg Thieme Verlag KG Stuttgart · New York.)
- Published
- 2015
- Full Text
- View/download PDF
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