197,404 research outputs found
Proposal of a small-size reversible articulated tractor for safe operating in very steep hillsides
No full textA new tractor suitable to be used in extreme slope and narrow spaces is here proposed and described. It was primarily designed to address the problem of working in terraced vineyards trained with the so-called “pergola” system, very common in mountain areas. The mechanization problems in these vineyards are: i) very narrow inter-rows, often lower than 1.00 m and with the risk of roll-over, ii) reduced spans under the arbours (commonly ≤1.80 m, often 1.60 m), preventing normal tractors from being used with their ROPS in ordinary position; iii) steep and very tight curves in row heads, with great difficulties of manoeuvre. The prototypes were realized by WM srl (Prato all’Isarco, BZ, Italy), in collaboration with FUB and FIR, following the needs of a team of farmers. After OECD and field tests on these first prototypes, several technical solutions, focused especially on safety issues, were then proposed
Langfristige Auswirkungen ausbleibenden Strategieunterrichts auf das Lernverhalten von Studierenden und deren Einstellungen zur Schule
No full textIn einer Online-Studie wurden 1476 Studierende in Deutschland danach gefragt, in welcher Intensität ein systematisches Lehren von Lernstrategien in den letzten Jahren Bestandteil ihres regulären Schulunterrichts gewesen war. Darüber hinaus wurde überprüft, inwiefern sich das frühe Erlernen von Lernstrategien in der Schulzeit langfristig auf deren Anwendung im Studium auswirkt. Es wurde ermittelt, dass nur knapp 10 % der Studierenden systematischen Strategieunterricht erhalten hatten, wohingegen die überwiegende Mehrheit entweder gar keinen (etwa 40 %) oder nur sporadischen (etwa 50 %) Strategieunterricht erfahren hatten. Über die letzten Jahre hinweg zeigte sich aber eine geringe aber stetige Zunahme systematischen Strategieunterrichts. Darüber hinaus konnte gezeigt werden, dass das frühe Erlernen von Strategien in der Schulzeit zu deren häufigerer Anwendung im Studium führen kann. Die retrospektive Beurteilung des Schulunterrichts war von der Qualität und Quantität des in der Schule erlebten Strategieunterrichts abhängig.https://www.psyndex.de/psychologie/PSYNDEX.php?id=0293004&search=psycharchivesnotReviewedacceptedVersio
Concept and design of the ROPS for a small articulated tractor for extreme sloped vineyards
No full textA new reversible wheeled articulated tractor has been designed and realized by WM s.r.l.
(Prato all’Isarco, BZ, Italy) in collaboration with UNIBZ and FIR, to address the problem of
working in terraced vineyards trained with the so-called “pergola” system, very common in
mountain areas.
The whole design process of this tractor was characterized by a constant dialogue between
engineers and a selected pool of farmers, representative of final users, to have a product as
much as possible answering to the users’ needs and, hence, free from future requests of
design changes, according to the logic of Concurrent Engineering. In particular, conceiving
and designing a Roll-Over Protective Structure (ROPS) suitable to equip this small tractor
was a real engineering challenge: many design constraints, coming from the difficult environment
in which this tractor will operate and resulting from the very particular design of the
front part of the tractor, had to be matched with the (dimensional, structural) requests stated
from the OECD code 7 used for ROPS strength tests.
The operating environment for this tractor imposed reduced dimensions to the external outline
of this vehicle: vineyards inter-rows are very narrow (often lower than 1.00 m), as well as
spans under the arbours (commonly ≤1.80 m, often 1.60 m). A high compactness of the vehicle
was obtained by adopting an unconventional architecture for this tractor, i.e. an articulated
body with a Diesel engine placed in the front part, a reversible driving seat directly
placed on the motor, and the rear part acting as implement-carrier. Also the ROPS has some
peculiarities, studied to match safety-volume requirements with the possibility for farmers of
further reducing the overall height, if needed in some very narrow passages. In fact, the tractor
was equipped with a non-removable, tiltable and telescopic rear-mounted ROPS combined
with a top horizontal element and a frontal protection for the driver’s feet.
The absence of a conventional steering wheel (the tractor is driven by a cloche) and of an
engine-bonnet in front of the driver make this ROPS absolutely unique and not-provided for
by the norm; this latter fact puts two important questions to the testers, respectively on: (1)
how defining the front outline of the clearance zone (i.e. the point “D” of OECD code 7, fig.
7.1.a p. 23), usually defined in relation with the forward external edge steering wheel, and (2)
how identifying the hard points of the tractor capable of supporting the whole mass of the
overturned vehicle (i.e. the points defined on the basis of the imaginary ground plane).
Thanks to a careful interpretation of the inspiring principles of the norm and to the great experience
of the staff of the University of Bologna, these problems were successfully overProceedings
International Conference of Agricultural Engineering, Zurich, 06-10.07.2014 – www.eurageng.eu 2/8
come respectively by (1) limiting the clearance zone to the vertical line passing through the
point “C” (OECD code 7, fig. 7.1.a p. 23), thus operating even with a higher safety level, and
(2) by using the external edge of the feet protective structure to define the clearance zone
and the virtual ground plane in case of overturning
Wer hat(te) Angst vor dem polnischen Klempner? Über das Potenzial moderner politischer Mythologie und die Rentabilität von Stereotypen
No full textKonczal K. Wer hat(te) Angst vor dem polnischen Klempner? Über das Potenzial moderner politischer Mythologie und die Rentabilität von Stereotypen. In: Dmitrów E, Weger T, eds. Deutschlands östliche Nachbarschaften. Eine Sammlung historischer Essays für Hans Henning Hahn. Die Deutschen und das östliche Europa. Vol 4. Frankfurt a. M: Peter Lang; 2008: 703–717
Poetry beyond text:vision, text + cognition
No full textM. Modeen, Ed. (2011). With Introduction by Andrew Michael Roberts and additional contributions by Knowles, Fischer, Otty, Schaffner, and Weger
Tide-dominated deltas responding to high-frequency sea-level changes, pre-messinian Rifian Corridor, Morocco: Discussion
No full textBeelen et. al. (2020) reinterpreted the late Miocene contourite depositional system of the Saiss Basin in the Rifian Corridor, Morocco (Capella et al. 2017; de Weger et al. 2020), as a tide-dominated delta environment that responded to high-frequency sea-level changes. Despite the authors stimulating a valuable discussion on the interpretation of the studied deposits, their proposed depositional system seems largely based on erroneous interpretations of the data that are misleading for the reader who is unfamiliar with the geological framework of the study area. Based on i) issues with spatial location of the outcrops they interpreted relative to known tectonic structures, ii) poor or contradictory age control that suggests that the studied outcrops are the same age, iii) evidence from faunal and sedimentary structures that better supports a deep-water setting, and iv) a lack of evidence to support the necessarily high-amplitude relative or eustatic sea-level changes, we consider that the balance of evidence recognized in these outcrops better supports a deep-water setting. With this comment, we would like to address these inconsistencies and express our concerns about the train of thought used by Beelen et al. for their interpretation of shallow-marine rather than deep-marine depositional settings for the studied intervals
Dr. Duane M. Jackson, Morehouse College, July 2011
No full textThis video is a conversation with Dr. Duane M. Jackson. Dr. Jackson talks about his paper, "Recall and the Serial Position Effect: The Role of Primacy and Recency on Accounting Students' Performance." Jackie Daniel, AUC Woodruff Library, is the interviewer
"Reflections on the subject of Emigration from Europe with a view to Settlement in the United States" By M. Carey.
No full text"Reflections on the subject of Emigration from Europe with a view to Settlement in the United States: containing bried sketches of the moral and political character of those states.
By M. Carey, member of the American philosophical, and of the American Antiquarian Society, and author of The Olive Branch, Cindiciae Hibernicae, essays on banking, on political economy, and on internal improvement.
To which are now added the English editor's comments on the subject; together with Important Advice to Emigrants, and Cautions Against Impositions Practiced in the Outports
Dispelling the Myths Behind First-author Citation Counts
No full textWe conducted a full-scale evaluative citation analysis study of scholars in the XML research field to explore just how different from each other author rankings resulting from different citation counting methods actually are, and to demonstrate the capability of emerging data and tools on the Web in supporting more realistic citation counting methods. Our results contest some common arguments for the continued
use of first-author citation counts in the evaluation of scholars, such as high correlations between author rankings by first-author citation counts and other citation
counting methods, and high costs of using more realistic citation counting methods that are not well-supported by the ISI databases. It is argued that increasingly available digital full text research papers make it possible for citation analysis studies to go beyond what the ISI databases have directly supported and to employ more
sophisticated methods
Dr. Glendon Swarthout
No full textHosted by Roger M. Busfield, MSU Assistant Professor of Speech and Theater, Meet the Author is designed to introduce a general audience to a contemporary author and their work through in-depth interviews. This episode features a conversation between Dr. Glendon Swarthout, prolific author and English professor at MSU, and assistant professors Sam S. Baskett and Theodore B. Strandness
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