1,669,153 research outputs found
Face Validation Method Alternatives for Shiphandling Fuzzy Logic Difficulty Model
The development of shiphandling difficulty model for ferry is based on the empirical experience through the Master of Ro-Ro ferries. The SHDMF is consisted from two parts which are the Analytic Hierarchy Process (AHP) and Fuzzy Inference System. Both parts had been validated through internal validation in the form of consistency test for the first part and robustness test for the second part. Further, the external/face validation is required to compare the proposed model with similar model through benchmarking approach. The benchmarking approaches are elaborated for the reliability, validity, possibility, efficiency and effectiveness. Through fuzzy group decision making method, the questionnaire survey is performed to verify the most appropriate approach based on the shiphandling simulator as the most preferred benchmarking tool by experts. Next, the proposed scenario is overviewed and discussed especially related to the advantages and drawbacks of shiphandling simulator. Keywords: shiphandling difficulty, fuzzy group decision making, internal validation Model pengukuran kesulitan pengendalian feri didasarkan pada pengalaman empiris melalui pernyataan nahkoda kapal feri Ro-Ro. SHDMF terdiri atas dua bagian, yaitu Analytic Hierarchy Process dan Fuzzy Inference System. Kedua bagian ini telah divalidasi melalui validasi internal dalam bentuk uji konsistensi untuk bagian pertama dan uji kehandalan untuk bagian kedua. Selanjutnya validasi atau wajah eksternal diperlukan untuk membandingkan model yang diusulkan dengan model yang diperoleh dari benchmarking. Pendekatan benchmarking dijabarkan untuk kehandalan, validitas, kemungkinan, efisiensi, dan efektivitas. Melalui metode fuzzy kelompok pembuatan keputusan, survei kuesioner dilakukan untuk memverifikasi pendekatan yang paling tepat dengan simulator pengendalian kapal sebagai alat yang paling disukai oleh para ahli untuk benchmarking. Selanjutnya skenario yang ditinjau-ulang dan dibahas terutama terkait dengan keuntungan dan kelemahan simulator pengendalian kapal. Kata
Validation of community pharmacy : confirming the effectiveness of a pharmacist in a community setting
Validation of community pharmacy is a concept we
coined to define the process carried out to
demonstrate that the services provided by a
community pharmacist are needed by the community.
One method to undertake such a process was
developed. This method involves the use of a series of
Validation Tools which are measurement tools with
which to monitor the standards of the service
provided by a community pharmacist. Five
Validation Tools were developed and subsequently the
validity and reliability of these tools were tested. The
developed Validation Tools were found to be valid and
reliable methods which can be confidently used by
community pharmacists to confirm the impact of their
services on patient care.peer-reviewe
Fast Cross-Validation via Sequential Testing
With the increasing size of today's data sets, finding the right parameter
configuration in model selection via cross-validation can be an extremely
time-consuming task. In this paper we propose an improved cross-validation
procedure which uses nonparametric testing coupled with sequential analysis to
determine the best parameter set on linearly increasing subsets of the data. By
eliminating underperforming candidates quickly and keeping promising candidates
as long as possible, the method speeds up the computation while preserving the
capability of the full cross-validation. Theoretical considerations underline
the statistical power of our procedure. The experimental evaluation shows that
our method reduces the computation time by a factor of up to 120 compared to a
full cross-validation with a negligible impact on the accuracy
Cross-validation in nonparametric regression with outliers
A popular data-driven method for choosing the bandwidth in standard kernel
regression is cross-validation. Even when there are outliers in the data,
robust kernel regression can be used to estimate the unknown regression curve
[Robust and Nonlinear Time Series Analysis. Lecture Notes in Statist. (1984) 26
163--184]. However, under these circumstances standard cross-validation is no
longer a satisfactory bandwidth selector because it is unduly influenced by
extreme prediction errors caused by the existence of these outliers. A more
robust method proposed here is a cross-validation method that discounts the
extreme prediction errors. In large samples the robust method chooses
consistent bandwidths, and the consistency of the method is practically
independent of the form in which extreme prediction errors are discounted.
Additionally, evaluation of the method's finite sample behavior in a simulation
demonstrates that the proposed method performs favorably. This method can also
be applied to other problems, for example, model selection, that require
cross-validation.Comment: Published at http://dx.doi.org/10.1214/009053605000000499 in the
Annals of Statistics (http://www.imstat.org/aos/) by the Institute of
Mathematical Statistics (http://www.imstat.org
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