1,355,443 research outputs found
Hackenberg et al 2021
No full text5 Data sets used to validate
SimpleForest - a comprehensive tool for 3d reconstruction of trees from forest plot point clouds
Subsets:
Data containing demol in the name is originated from:
https://zenodo.org/record/4557401
and should be cited:
Demol, Miro, Gielen, Bert, & Verbeeck, Hans. (2021). QSMs, point cloud and harvest data from a destructive forest biomass experiment in Belgium using terrestrial laser scanning (Version Version 1.0) [Data set]. Zenodo. http://doi.org/10.5281/zenodo.4557401
Data containing deTanago in the name is originated from:
http://lucid.wur.nl/datasets/terrestrial-lidar-of-tropical-forests
and should be cited:
Gonzalez de Tanago, J., Lau, A., Bartholomeus, H., Herold, M., Avitabile, V., Raumonen, P. Martius, C., Goodman, R. C., Disney, M., Manuri, S., Burt, A., Calders, K. (2017). Estimation of above-ground biomass of large tropical trees with Terrestrial LiDAR. Methods in Ecology and Evolution. DOI:10.1111/2041-210X.12904
Data containing hackenberg should be cited:
Hackenberg J, Wassenberg M, Spiecker H, Sun D. Non Destructive Method for Biomass Prediction Combining TLS Derived Tree Volume and Wood Density. Forests. 2015; 6(4):1274-1300. https://doi.org/10.3390/f6041274
Data containing wytham should be cited:
Calders K, Origo N, Burt A, Disney M, Nightingale J, Raumonen P Åkerblom M, Malhi Y and Lewis P. Realistic Forest Stand Reconstruction from Terrestrial LiDAR for Radiative Transfer Modelling. Remote Sensing; 2018; 10(6): 10.3390/rs10060933.
Data containing leibzig gives credit to:
The clouds's origin: Leipzig Canopy Crane facility financed by the German Centre for Integrative Biodiversity Research (iDiv) Halle-Jena-Leipzig.
The clouds's owner: Systematic Botany and Functional Biodiversity, Institute for Biology, Leipzig University
ICH HEIBE (my name is) ROSA LUXEMBURG
No full textA video and sound installation by Sigrid Hackenberg, 2001
Spatial approaches for rural energy access planning: a systematic review of available methods and tools
No full textThe dataset contains a matrix of all the publications used in the systematic literature review. The columns consist of all the key characteristics that were dealt with and with which we draw our results from. The qualitative and quantitative results from this matrix were handled through the programming language R but any statistical program can be used
Mathematical Caring Relations in Action
Get PDFIn a small-scale, 8-month teaching experiment, the author aimed to establish and maintain mathematical caring relations (MCRs) (Hackenberg, 2005c) with 4 6th-grade students. From a teacher's perspective, establishing MCRs involves holding the work of orchestrating mathematical learning for students together with an orientation to monitor and respond to energetic fluctuations that may accompany student–teacher interactions. From a student's perspective, participating in an MCR involves some openness to the teacher's interventions in the student's mathematical activity and some willingness to pursue questions of interest. In this article, the author elucidates the nature of establishing MCRs with 2 of the 4 students in the study and examines what is mathematical about these caring relations. Analysis revealed that student–teacher interaction can be viewed as a linked chain of perturbations; in student–teacher interaction aimed toward the establishment of MCRs, the linked chain tends toward perturbations that are bearable (Tzur, 1995) for both students and teachers
Numerical optimization of the suction distribution for laminar flow control aerofoils
No full textIn recent years there has been an increasing interest in the search of methods for drag reduction on aircraft. A promising technique for the reduction of the skin-friction drag is to postpone transition from laminar to turbulent flow using either suction - Laminar Flow Control - or suction plus a favourable pressure gradient - Hybrid Laminar Flow Control. However, for an efficient application of these concepts, the suction distribution has to be optimized to ensure that the gain in drag reduction exceeds the power penalty. In this thesis a numerical algorithm has been developed to optimize the suction distribution over several independent suction panels either while maintaining transition at a desired location or while minimizing the overall power consumption. The numerical code comprises four steps; the calculation of the boundary-layer flow, the determination of the spatial amplification factors of the two-dimensional Tollmien-Schlichting waves, the prediction of the transition location via the eN-method, and finally, the optimization of the suction flow rates. Optimizing the suction distribution while maintaining transition at a desired location can be expressed as a constrained optimization problem, which is solved using an adaptive algorithm based on the gradient projection method. The numerical solution of this problem is very intensive computationally, therefore the use of parallel computation techniques is of advantage. The numerical code has first been applied to flat-plate boundary layers with zero and non-zero pressure gradients and up to eight suction panels, and later to flows over NACA aerofoil sections. Comparison with experimental results has permitted the validation of the code. The results show that suction is a suitable means for the postponement of transition. The optimum suction distribution has been found to be strongly dependent on the pressure distribution, the configuration of the suction panels and the desired transition location.(DX184260)</p
Kenneth L. Hackenberg, All-Electric Building Award, Dutch Pantry Restaurant, A
No full textThree men pose with the All-Electric Building Award gifted to Kenneth L. Hackenberg, assistant to the president of Dutch Pantry Restaurant at 5555 East Hillsboro Avenue.https://digitalcommons.usf.edu/gandy_commercial/5333/thumbnail.jp
Numerical studies of the automatic control of Boundary-Layer transition via multiple suction panels
No full textA numerical algorithm is introduced for the optimization of the suction distribution to maintain transition at a desired position for a flow over a flat plate with a smooth two-dimensional hump and an array of suction panels. The computation consists of the calculation of the interacting boundary-layer flow, the determination of the spatial growth rates of the disturbance waves, the prediction of the transition location via the eN-method and finally of the optimization of the suction flow rates using a modified least mean-squares algorithm. The optimization algorithm has been successfully applied to plates with two or four suction panels. The results show clearly that the pressure distribution has a highly significant effect on the optimum suction distribution over the plate. The numerical code shows its potential to be applied to laminar flow control aerofoils to determine the optimum suction distribution for given flight conditions.</p
La place et l’importance de l’école populaire dans la civilisation moderne, par A. Hackenberg ; Neuwied et Leipzig, chez Heuser 1884
No full textSion Jules. La place et l’importance de l’école populaire dans la civilisation moderne, par A. Hackenberg ; Neuwied et Leipzig, chez Heuser 1884. In: La revue pédagogique, tome 6, Janvier-Juin 1885. pp. 273-276
Going Beyond Counting First Authors in Author Co-citation Analysis
Get PDFThe present study examines one of the fundamental aspects of author co-citation analysis (ACA) - the way co-citation
counts are defined. Co-citation counting provides the data on which all subsequent statistical analyses and mappings
are based, and we compare ACA results based on two different types of co-citation counting - the traditional type that
only counts the first one among a cited work's authors on the one hand and a non-traditional type that takes into
account the first 5 authors of a cited work on the other hand. Results indicate that the picture produced through this non-traditional author co-citation counting contains more coherent author groups and is therefore considerably clearer. However, this picture represents fewer specialties in the research field being studied than that produced through the traditional first-author co-citation counting when the same number of top-ranked authors is selected and analyzed. Reasons for these effects are discussed
Variations on the Author
Get PDF“Variations on the Author” discusses two of Eduardo Coutinho’s recent films (Um Dia na Vida, from 2010, and Últimas Conversas, posthumously released in 2015) and their contribution to the general question of documentary authorship. The director’s filmography is characterized by a consistent yet self-effacing form of authorial self-inscription: Coutinho often features as an interviewer that rather than express opinions propels discourses; an interviewer that is good at listening. This mode of self-inscription characterizes him as an author who is not expressive but who is nonetheless markedly present on the screen. In Um Dia na Vida, however, Coutinho is completely absent form the image, while Últimas Conversas, on the contrary, includes a confessional prologue that moves the director from the margins to the center of his films. This article examines the ways in which these works stand out in the filmography of a director who offers new insights into the notion of cinematic authorship
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