559 research outputs found
A. R. G. Heesterman, Allocation models and their use in economic plannings
No full textCaire Guy. A. R. G. Heesterman, Allocation models and their use in economic plannings. In: Tiers-Monde, tome 14, n°54, 1973. Le développement rural. p. 437
Development of an active toe concept for multi-link rear suspensions
No full textThis report presents the results of a master thesis with the objective to develop an active toe angle concept on vehicles with a multi-link rear suspension. The result is a design for a concept which uses the roll of the vehicle and adjustments of the suspensions geometry as drivers. From a market analysis, three technologies are defined to actuate the toe angle of the rear wheels; four-wheel steering, four-wheel independent steering and active geometry suspension. Because of the opportunities of the latter, an addition on the current actuation is proposed. This new concept embodies two modes for a more stable but also a more agile ride. Current technologies are compared with the new concept using the customer attributes and it is concluded that active geometry suspension is favourable regarding the costs, the safety risks and the reduction of fuel consumption. To validate the performance of this new concept, a BMW E60 vehicle model is created using Simulink and the effects of changing the suspension geometry are evaluated. With this bicycle model, the driving limits during cornering are mapped for the stable and agile mode. For the two modes, it is proven that they are effective to alter the vehicle dynamics to the desired response. In the stable mode, the possible cornering circumstances are increased. In the agile position, the yaw rate is increased and the turning radius decreased. With these results, the potential impact of the proposed concept is proven satisfactory. To select the position of actuation in the rear suspension, a model of the BMW’s rear suspension is built with the use of Lotus Suspension Analysis Software. This model is validated first on data available from the kinematics. With the model, the desired toe changed is searched by moving the joints. A isolated joint has been found which alters the roll steer without influencing the camber angle. The reaction forces on the joints are also checked for different modes and cornering situations, although the compliance was not taken into account. To conclude, a methodological approach is used to create a design proposal. First the House of Quality is used to determine which functional and technical attributes are important. The displacement range and the settling time are the most important functional attributes, while reduction of the actuated force, making the concept modular and reducing the cost are the technical attributes with the highest ranking. From the seven designs which have been created, a choice is made using a pairwise comparison. Since this method yielded no direct outcome, the insights from the comparison are used to create a new design, which is ultimately engineered for some key characteristics.Precision and Microsystems EngineeringMechanical, Maritime and Materials Engineerin
The Relationship Between Social Functioning and Resilience in Young People with Conduct Problems and Callous-Unemotional Traits.
No full textResilience is the dynamic process of achieving positive outcomes in the presence of risk or difficulties. For young people, greater social functioning tends to increase resilience as individuals benefit from the support of family, peers and any teachers or adults around them. Additionally, these relationships provide young people an opportunity to practice skills which might also contribute to better outcomes (e.g., learning how to collaborate effectively). The current study investigated how the association between resilience and each of peer relationships, collaboration, perspective taking, empathic concern and prosocial behaviour was different across four groups of adolescent participants with high and low callous-unemotional (CU) traits and/or conduct problems (CP). Individuals varying on CU and CP tend to have reduced social functioning, reduced resilience and be at risk for worse long-term outcomes. A multiple regression analysis showed that as these social functioning variables increased, so did resilience for all groups other than those high on CP alone. Significant predictors within the model varied depending on whether individuals were high on both, one or neither of CU and CP. Collaboration, prosocial behaviour and peer relationships were all significant predictors of resilience for individuals low on both difficulties, whereas collaboration was the only significant predictor those only high on callous-unemotional traits. Prosocial behaviour was the only significant predictor for those high on both difficulties. These results suggest the importance of considering how these difficulties interact as greater resilience might be fostered in different ways depending on the unique pattern individuals exhibit of callous-unemotional traits and conduct problems. </p
Design and Construction of an Experimental Setup to Enhance Mineral Weathering through the Activity of Soil Organisms
No full textWe acknowledge Ton van der Zalm from Tupola for the development of the irrigation system. Additionally, we thank Jaco Baars from Tupola for the laughs and mental support given during the building of this setup. We thank Peter Garamszegi and & Aacute;ngel Velasco Sanchez for helping inwatering the columns manually when the irrigation system was not functional. We also thank Steven Heesterman, Xuming Li, Karen Moran Rivera, Jonna van den Berg and Kangying Xie for the help provided during the sampling. We thank Peggy Bartsch, Tom Jaeppinen, Peter Nobels, Brent Rotgans, Andre van Leeuwen and Gerlinde Vink for the assistance in the lab, the analyses of the samples and the fruitful discussions. Finally, we thank Jeroen Zonneveld from Unifarm for the provision and maintenance of the climate chamber. This setup was built as part of the Bio-Accelerated Mineral Weathering (BAM!) project, which is funded by the European Union Horizon 2020 framework program for research and innovation under grant agreement No 964545
On Newly found Mss. of the Vādhūla School of the Yajurveda
No full textThe Vādhūla school belongs to the Taittirīya śākhā of Yajurveda and it is one of the oldest school in this Veda. The texts and the detailed information of this school had not been known to the researchers of Vedic literature except the reference of the name in the list of Vedic schools in some mediaeval texts like Caraṇavyūha etc. and the occasional small quotations in commentaries to other Śrautasūtras and Gṛhyasūtras. Prof. W. Caland first published many excerpts from the Śrautasūtra and the Brāhmaṇa of this school in 1920's with studies on various aspects of the texts.Prof. M. Witzel revived the interest in this school in his excellent study in 1975 with information of more MSS materials belonging to this school. Afterwards, two editions of the Śrautasūtra were published, one by the joint work of M. Sparreboom and J.C. Heesterman (1989) and another by B.B. Chaubey (1993). The MSS. known to these scholars, however, are quite defective ones with a lot of large lacunae and they belong to only a single recension. The author of present article has attempted several research trips to South India and has obtained new MSS which have not been known to scholars. They include the MSS of the Śrautasūtra, the Gṛhyasūtra (which has not been known except for some fragments), the Brāhmaṇa, commentaries and Prayogas. I have been preparing for the editions of these texts in cooperation with young scholars. In this article, the detailed information of the MSS of Śrautasūtra are presented
The Rishukyo : A translation and commentary in the light of modern Japanese (post-Meiji) scholarship.
No full textThis thesis is a translation of and commentary on the Tantric Buddhist Master Amoghavajra (705-74)'s Li-clki Ching gag (Japanese: Rishukyo, Taisho: 243), the Prajparamita in 150 Verses. Whilst there are some remarks of a historical and text-critical nature, the primary
concern is with the text as a religious document, in the context of the scholarship and practice of the modern Japanese Shingon Sect.
The Stara occupies a central position in this sect, being an integral part in its daily worship and in the academic and practical training of its priests.
The Rishukyo is extant in ten versions: a Sanskrit/Khotanese fragment (?150 verses), a Tibetan 150-verse version and six Chinese versions, one of which is a lengthy, so-called Extended Version. This last is parallelled by two Extended Versions in Tibetan, and, although an examination of the Tibetan sources lies outwith the scope of this study, the thesis sketches some of the possibilities for historical research into the Buddhist Tantric tradition in Central and East Asia which these three
longer recensions open up. The Chinese versions -beginning with HsUantsang's (T.220(10))- show varying degrees of esoteric influence. This fact has significance for our understanding of Amoghavajra's version, which is a well co-ordinated ritual text.
The systematic philosophical and symbolic expression of traditional Buddhist teachings which is inherent in Tantric ritual intent is the focus of this thesis. To this end, modern Japanese studies of the text have been consulted, as have the commentaries by Amoghavajra and Kaai, to which modern Shingon exponents consistently trace their ideas. The
thesis thus gives a general picture of an unbroken tradition which stretches back some twelve centuries, even though the abundant commentarial literature on the Rishukyo up to the Meiji period has not been used.
The section of the Bibliography dealing with works on the Rishukyo comprises a list which is considerably more comprehensive than those found elsewhere
From use cases of the Joint European Torus towards integrated commissioning requirements of the ITER tokamak
No full textThe Joint European Torus (JET) is the largest tokamak currently in operation in the world. One of the greatest challenges of JET is the integrated commissioning of all its major plant systems. This is driven, partially, by the size and complexity of its operational infrastructure and also by the fact that, being an international environment, it has to address the issues of integrating, commissioning and maintaining plant systems developed by third parties.
The ITER tokamak, now in construction, is a fusion device twice the size of JET and, being a joint effort between the European Union, China, India, Japan, South Korea, the Russian Federation and the USA, it will share on a wider scale all of the JET challenges regarding integration and integrated commissioning of very large and complex plant systems.
With the scope of taking advantage from the history and experience of JET, Fusion for Energy (F4E) has worked together with the Culham Centre for Fusion Energy (CCFE), the host and operator of JET, for the provision of ITER relevant user experiences related to the integrated commissioning of the tokamak. This work presents and discusses the main results and the methods that were used to extract and translate the commissioning experience information into ITER requirements
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