136,075 research outputs found
An overview of Suctorian ciliates (Ciliophora, Suctorea) as epibionts of halacarid mites (Acari, Halacaridae)
No full textScant information is available regarding the prevalence and distribution of suctorian ciliates on halacarid mites. However,
using this limited information and data from our laboratory on the systematics, biology, ecology and distribution of
suctorian ciliates that are epibionts of halacarid mites, we redescribed four suctorian species: Limnoricus ceter (Jankowski),
Praethecacineta halacari (Schulz), Thecacineta calix (Schroder) and Acineta sulcata Dons. We also recognized
Lissacineta allgeni Jankowski and Thecacineta allgeni (Jankowski) as synonyms of Praethecacineta halacari (Schluz),
and Thecacineta laophontis Jankowski and Paracineta moebiusi Kahl as synonyms of Thecacineta calix (Schroder).
Many suctorians have been reported, but not properly identified in the halacarid literature. So, we have attempted to
identify those suctorians to species level. Lastly, the interactions between the suctorians and their hosts are also discussed
and Praethecacineta halacari is also reported for the first time from the Indian coast
MeSH term explosion and author rank improve expert recommendations
No full textInformation overload is an often-cited phenomenon that reduces the productivity, efficiency and efficacy of scientists. One challenge for scientists is to find appropriate collaborators in their research. The literature describes various solutions to the problem of expertise location, but most current approaches do not appear to be very suitable for expert recommendations in biomedical research. In this study, we present the development and initial evaluation of a vector space model-based algorithm to calculate researcher similarity using four inputs: 1) MeSH terms of publications; 2) MeSH terms and author rank; 3) exploded MeSH terms; and 4) exploded MeSH terms and author rank. We developed and evaluated the algorithm using a data set of 17,525 authors and their 22,542 papers. On average, our algorithms correctly predicted 2.5 of the top 5/10 coauthors of individual scientists. Exploded MeSH and author rank outperformed all other algorithms in accuracy, followed closely by MeSH and author rank. Our results show that the accuracy of MeSH term-based matching can be enhanced with other metadata such as author rank
Going Beyond Counting First Authors in Author Co-citation Analysis
No full textThe 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
Simulation and comparison of silvicultural alternatives for even-aged Pinus pinaster Ait stands in Galicia (Northwestern Spain)
No full textThree silvicultural alternatives for pure, even-aged stands of maritime pine (Pinus pinaster Ait) grown in Galicia (Northwestern Spain) are simulated and compared. First, each silvicultural alternative is described by a specific combination of initial stand-density, pre-commercial treatment, thinning pattern, and rotation age. The development of each silvicultural alternative is simulated using a regional growth and yield projection system based on a dynamic stand growth simulator and a size class model for representative trees. Different timber grades associated with each alternative are predicted and estimates of costs and selling prices are used to predict a cash flow pattern for each of the simulated alternatives. Finally, the alternatives are ranked using the criteria net present value of an infinite series of like rotations and internal rate of return. For the present market conditions, the most intensive silvicultural alternative is the most desirable one if profit maximization is the objective of forest management
Simulation and comparison of silvicultural alternatives for even-aged Pinus pinaster Ait stands in Galicia (Northwestern Spain)
No full textThree silvicultural alternatives for pure, even-aged stands of maritime pine (Pinus pinaster Ait) grown in Galicia (Northwestern Spain) are simulated and compared. First, each silvicultural alternative is described by a specific combination of initial stand-density, pre-commercial treatment, thinning pattern, and rotation age. The development of each silvicultural alternative is simulated using a regional growth and yield projection system based on a dynamic stand growth simulator and a size class model for representative trees. Different timber grades associated with each alternative are predicted and estimates of costs and selling prices are used to predict a cash flow pattern for each of the simulated alternatives. Finally, the alternatives are ranked using the criteria net present value of an infinite series of like rotations and internal rate of return. For the present market conditions, the most intensive silvicultural alternative is the most desirable one if profit maximization is the objective of forest management
"Closing the R&D Gap, Evaluating the Sources of R&D Spending"
No full textBoth spending and tax policies have been implemented in the United States with the goal of stimulating private sector research and development (R&D). Karier questions whether current R&D policy, especially the research and experimentation tax credit, can contribute to closing the gap between nondefense expenditures on R&D in the United States and such expenditures in other countries, such as Japan and Germany. He also explores possible changes to our current R&D policy to make it more effective.
Moments of sorrow and joy: an empirical assessment of the complementary value of critical incidents in understanding customer service evaluations.
No full text3-d lattice QCD free energy to four loops
No full textDi Renzo F,, Mantovi A,, Miccio V,, Schroeder Y. 3-d lattice QCD free energy to four loops. JHEP. 2004;2004(05):006.We compute the expansion of the 3-d Lattice QCD free energy to four loop order by means of Numerical Stochastic Perturbation Theory. The first and second order are already known and are correctly reproduced. The third and fourth order coefficients are new results. The known logarithmic divergence in the fourth order is correctly identified. We comment on the relevance of our computation in the context of dimensionally reduced finite temperature QCD
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