103,826 research outputs found
Data for: Scale-appropriate mechanization impacts on productivity and technical efficiency among smallholders: Evidence from rice systems in the mid-hills of Nepal
No full textThis file contains the codebook (for the variables description), datasets, and STATA program codes that were used to generate the results of the paper
Data for: Smallholder farmers’ willingness to pay for scale-appropriate farm mechanization: Evidence from the mid-hills of Nepal
No full textMeta data and data used in this article
Computing critical nodes in directed graphs
No full textWe consider the critical node detection problem (CNDP) in directed graphs. Given a directed graph G and a parameter k, we wish to remove a subset S of at most k vertices of G such that the residual graph G n S has minimum pairwise strong connectivity. This problem is NP-hard, and thus we are interested in practical heuristics. We present a sophisticated linear-time algorithm for the k = 1 case, and, based on this algorithm, give an efficient heuristic for the general case. Then, we conduct a thorough experimental evaluation of various heuristics for CNDP. Our experimental results suggest that our heuristic performs very well in practice, both in terms of running time and of solution quality
Curved Track Analysis of FSO Link for Ground-to-Train Communications
No full textIn this work, a free space optical (FSO) link for the ground-to-train (G2T-FSO) communications is proposed. Analytical analysis is carried out for the curved rail tracks. We show that the transmitter divergence angle, the transmit power and the size of the concentration lens need to increase for the curved section of the rail track compared to the straight track. We derive the analytical expression for the received power level based on the link geometry for the case of the curved track In the worst case scenario when the curvature radius is 120 m, the transmit power at the optical base station (BS) needs to increase by over 2 dB when the concentration lens radius is increased by 5 times. Analyses also show that the received power along the track increases with the curvature radius for the same transmit power and receiver optics illustrating the effect due to link geometry. Additionally, the signal-to-noise ratio (SNR) and the bit error rate (BER) performance of the system for the curved track with different curvature radii is analysed at data rates of 10 Mbps and 100 Mbps for an additive white Gaussian noise (AWGN) channel showing a good agreement between the theoretical and the simulated BER. Finally, effect of scintillations on the G2T-FSO link performance is discussed
Computing 2-Connected components and maximal 2-Connected subgraphs in directed graphs: An experimental study
No full textMotivated by very recent work on 2-connectivity in directed graphs, we revisit the problem of computing the 2-edge- and 2-vertex-connected components, and the maximal 2-edge- and 2-vertex-connected subgraphs of a directed graph G. We explore the design space for efficient algorithms in practice, based on recently proposed techniques, and conduct a thorough empirical study to highlight the merits and weaknesses of each technique
Donation programme of returned medicines: Role of donors and point of view of beneficiaries
No full textBackground: Donation of returned medicines is a debated health policy issue as it is discouraged by WHO, but accepted in some countries. Methods: Lessons learned from a donation programme of returned medicines carried out in Europe were documented. Results: The donation programme we reviewed followed a strict protocol for collection, sorting and distribution of returned drugs, in order to avoid the major limitations associated with unused medicine donations. Over a period of 3 years, 23 145 boxes of medicines were donated to 14 organizations operating in Europe, Africa and Latin America. Conclusions: The donations covered about one-third of the volume of medicines used by beneficiary organizations. The programme helped to decrease expenditure by both patients and health facilities
Wie verändern sich die subjektiven Theorien von Lehramtsstudierenden über guten inklusiven Unterricht?
No full textFaix A-C. Wie verändern sich die subjektiven Theorien von Lehramtsstudierenden über guten inklusiven Unterricht? In: Schimek B, Kremsner G, Proyer M, Grubich R, Paudel F, Grubich-Müller R, eds. Grenzen.Gänge.Zwischen.Welten.: Kontroversen - Entwicklungen - Perspektiven der Inklusionsforschung. Bad Heilbrunn: Verlag Julius Klinkhardt; 2022: 246-254
Crown and regeneration responses to silviculture systems in Pine and Sal forests: preliminary results from silviculture trials in Mid-hills Nepal
No full textSilviculture trial plots were established in Kavre and Lamjung districts by the EnLiFT Project (Enhancing livelihoods and food security through improved agroforestry and community forestry in Nepal) to examine stand response to selected silviculture systems – uniform shelterwood, selection system, and negative thinning and as a showcase to forest users for these silviculture systems. This paper analyses the extent of canopy gaps on these trial plots after one-year of application of silviculture treatments and regeneration development. Using crown photographs, crown cover was estimated and compared between silviculture systems. The analysis showed that rigid silviculture systems like shelterwood and selection systems created canopy gap larger than negative thinning in Pine plantations and the rate of natural regeneration was directly related with the canopy gap. However, in Shorea robusta-Castanopsis- Schima (Sal-Katus-Chilaune) forest, negative thinning created canopy gap larger than selection system due to removal of 4-D trees, majority of trees were Schima wallichii (Chilaune),which typically have large spreading crown. Although, it may be too early to conclude the relationship between regeneration development and canopy gap from the trial plots, it became clear that silviculture operations have significant role in promoting higher regeneration. Selection and shelterwood systems are better than current silviculture regime represented by negative thinning in this study.E. Cedamon, G. Paudel, M. Basyal, I. Nuberg and N. Paude
Applications of single-tree selection guideline folllowing a DBq approach on Nepal's community forests
No full textThere is growing interest by forest users, government forest officers and policy makers on maximising forest goods and livelihood provisions from community forestry in a sustainable manner. However, the way several mature community forests are currently managed based on selection, e.g. negative thinning and crown thinning, is questionable as it results to decline in forest stock, timber quality and regeneration. To assist forest users in managing their community forests, an action research was implemented in Kavre and Lamjung to manage planted Pine (Pinus spp.) and naturallyregenerated Sal (Shorea robusta) through selection system. This paper describes the q-factor and its relevance for sustainable community forest management in Nepal. The simple guideline for selection system introduced to 30 community forest users groups in six sites are presented for wider adoption and policy recommendation.E. Cedamon, G. Paudel, M. Basyal, I. Nuberg and K. K. Shresth
Zum Umgang mit als störend wahrgenommenen Handlungsweisen von Schüler*innen in einem inklusionsorientierten Unterricht - Perspektiven für die Lehrer*innenbildung (im Förderschwerpunkt emotionale und soziale Entwicklung)
No full textAmrhein B, Badstieber B, Schroeder R. Zum Umgang mit als störend wahrgenommenen Handlungsweisen von Schüler*innen in einem inklusionsorientierten Unterricht - Perspektiven für die Lehrer*innenbildung (im Förderschwerpunkt emotionale und soziale Entwicklung). In: Schimek B, Kremsner G, Grubich R, Paudel F, Grubich-Müller R, eds. „Grenzen.Gänge.Zwischen.Welten“ Kontroversen - Entwicklungen - Perspektiven der Inklusionsforschung. Bad Heilbrunn: Klinkhardt; 2022: 263-270
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