Suche
Anzeige der Dokumente 71-80 von 743
Aufsatz
Effect of Cell Morphology on Flexural Behavior of Injection-Molded Microcellular Polycarbonate
(2022-05-19)
The quantitative study of the structure and properties relationship in cellular materials is mostly limited to cell diameter, cell density, skin layer thickness, and cell size distribution. In addition, the investigation of the morphology is generally carried out in two dimensions. Therefore, the
interrelation between morphological properties and mechanical characteristics of the foam structure has remained in an uncertain state. In this study, during the physical foaming process, a foam morphology is locally created ...
Video
CONVERSOS Y CREYENTES
(2020-06-20)
1: Posmodernidad y posmodernismo
2: La obra de los arquitectos “conversos”
3: La obra de los arquitectos “creyentes”
Juan Carlos Doblado
Arquitecto de la Universidad Ricardo Palma, con una maestría en la Universidad Nacional de Ingeniería.
Fue Medalla de Oro en el Foro Mundial de Jóvenes Arquitectos (1993) y miembro fundador de ARQUIDEA.
Ha ganado el Hexágono de Bronce en la Bienal de Arquitectura de Lima y se desempeña como profesor de diseño arquitectónico en la Universidad Peruana de Ciencias Aplicadas y ...
Aufsatz
Mechanics of colloidal supraparticles under compression
(2021-10-13)
Colloidal supraparticles are finite, spherical assemblies of many primary particles. To take advantage of their emergent functionalities, such supraparticles must retain their structural integrity. Here, we investigate their size-dependent mechanical properties via nanoindentation. We find that the deformation resistance inversely scales with the primary particle diameter, while the work of deformation is dependent on the supraparticle diameter. We adopt the Griffith theory to such particulate systems to provide a ...
Aufsatz
On data-driven nonlinear uncertainty modeling: Methods and application for control-oriented surface condition prediction in hard turning
(2020-10-16)
In this article, two data-driven modeling approaches are investigated, which allow an explicit modeling of uncertainty. For this purpose, parametric Takagi-Sugeno multi-models with bounded-error parameter estimation and nonparametric Gaussian process regression are applied and compared. These models can for instance be used for robust model-based control design. As an application, the prediction of residual stresses during hard turning depending on the machining parameters and the initial hardness is considered.
Aufsatz
Hydrogen absorption of ultra-high strength aluminum-silicon coated 22MnB5 steels
(2022-12-30)
The hot forming process allows to produce safety-relevant structural components in the automotive industry with strengths of 1500 MPa and higher. Generally, high strengths make material sensitive to hydrogen embrittlement. The heat treatment in the hot forming process chain is a potential source of diffusible hydrogen for hot-dipped aluminum-silicon coated boron-manganese steels. In the present work, the influence of different process gases and furnace dwell times during the heat treatment was investigated. Humidified ...
Dissertation
Sustainability of traditional cocoa agroforests in Ghana
(2022)
Cocoa (Theobroma cacao L.) is an important agricultural commodity that is important to the economies of many countries in the world. Due to cocoa’s dependence on fertile forests soils, its production is a major cause of deforestation and soil degradation in producing countries. When grown in agroforestry systems it can conserve biodiversity, sequester carbon (C), and maintain soil fertility. There are many cocoa agroforests which are managed without synthetic agrochemicals. Because organic cocoa certification is now ...
Aufsatz
Identification of socio-economic characteristics and farmers’ practices affecting rice (Oryza spp.) yields in Benin (West Africa)
(2022-12-28)
Rice (Oryza spp.) is one of the major staple foods in Benin. Benin has increased rice production through the expansion of cultivation area rather than increasing rice yields. To better understand the factors affecting rice yields, a thorough understanding of the current rice production system characteristics and constraints is required. The present study identifies socio-economic characteristics and farmers’ practices affecting rice yields and suggests improved cultivation practices in the sector. Data were collected ...
Bachelorarbeit
Planungshilfen zur Geschwisterkalbhaltung – Management und Kostenkalkulationen
(2022)
Im Rahmen der vorliegenden Bachelorarbeit wurden Planungshilfen entwickelt, die die praktische Umsetzung der Geschwisterkalbhaltung auf Milchvieh- oder Kooperationsbetrieben erleichtern sollen. Dabei sollen zum einen die Betriebsleiter*innen bei der Erarbeitung von betriebsspezifischen Szenarien für die potenzielle Geschwisterkalbhaltung unterstützt und zum anderen eine Berechnung der mit der Umsetzung verbundenen Kosten ermöglicht werden. Als Basis für die Entwicklung der Planungshilfen diente eine Literaturstudie. ...
Video
CONTEXTOS
(2021-06-12)
En esta conferencia se presentan las investigaciones y reflexiones académicas dedicadas los últimos 50 años a la infraestructura paisajística, urbanística y arquitectónica limeña.
Juvenal Baracco Barrios
Ingeniero Civil y Arquitecto por la Universidad Nacional de Ingeniería UNI
Becado del Deutscher Akademischer Austauschdienst DAAD en Berlín
Medalla Ricardo Palma por la Universidad Ricardo Palma URP
Doctor Honoris Causa URP
Profesor Universitario UNI (1965-1971)
Profesor principal de Diseño en la Facultad ...
Masterarbeit
Stadtklimaanalyse light
(2021-08)
Aufgrund des Klimawandels und den damit verbundenen wachsenden Anforderungen an Städte muss in Zukunft ein genauer Blick auf die Grün- und Freiflächen von Städten geworfen werden. Die Analyse und Bewertung von stadtklimatischen Verhältnissen innerhalb einer Stadt ist dabei jedoch besonders herausfordernd. Hinzu kommt, dass Stadtklimaanalysen teuer sind und daher nicht zum Monitoring und zur Evaluation von Maßnahmen eingesetzt werden können. Daher ist ein auf offenen Daten basiertes GIS-Tool in Zukunft wichtig, um ...