scholarly journals Comparative study between the proposed shape independent clustering method and the conventional methods (K-means and the other)

Author(s):  
Kohei Arai ◽  
Cahya Rahmad
2009 ◽  
Vol 66 (9) ◽  
pp. 1873-1882 ◽  
Author(s):  
Yong Liu ◽  
Yong Chen ◽  
Jiahua Cheng

Abstract Liu, Y., Chen, Y., and Cheng, J. 2009. A comparative study of optimization methods and conventional methods for sampling design in fishery-independent surveys. – ICES Journal of Marine Science, 66: 1873–1882. We have introduced and evaluated a procedure, the constrained spatial simulated annealing method, for developing an optimal sampling design for fishery-independent surveys. We used two criterion functions, minimization of the mean of the shortest distance (MMSD) and uniform distribution of point pairs for variogram estimation (WM), and three arrangements of the two criteria, all WM, all MMSD, and a combination of MMSD (2/3 of samples) and WM (1/3), to construct three optimized sampling designs (denoted as Designs I, II, and III, respectively). These three designs were compared in a simulation study with systematic sampling (Design IV) and stratified random sampling designs (Design V), commonly used in fishery-independent surveys. Three levels of sample size (small, medium, and large) were considered in the simulation study developed using a geostatistical approach. The results showed that for parameter estimation of the spatial covariance function, Design III was better than the other designs at relatively small sample size and Design II performed better than the other designs at relatively large sample size. For estimating fish stock abundance, the performance of the designs considered in this study can be ranked as follows: Design II > Design IV > Design III > Design V > Design I. It is clearly important to evaluate and improve sampling design based on historical survey data. Such a study allows us to identify an optimal sampling design to balance the quality of the data collected and the costs of the sampling programme, leading to the development and optimization of a sustainable and fishery-independent monitoring programme.


1969 ◽  
Vol 21 (03) ◽  
pp. 594-603 ◽  
Author(s):  
Y Takada ◽  
A Takada ◽  
J. L Ambrus

SummarySephadex gel filtration of human plasma gave results suggesting the presence of two proactivators of plasminogen, termed proactivators A and B.Activity resembling that of proactivator A was found in rabbit plasma, but not in guinea pig plasma.Plasminogen activators produced by the interaction of proactivator A of human plasma with streptokinase had no caseinolytic or TAMe esterolytic effect.Proactivator A can be separated in a form apparently free from plasminogen, as shown by the heated fibrin plate test and by immunological analysis. On the other hand, proactivator B concentrates prepared so far are contamined with plasminogen.Human proactivators appear to be far more susceptible to streptokinase than are rabbit proactivators.Inhibitors of the fibrinolysin system were observed in the plasmas of all 3 species. These inhibitors are not present in the euglobulin fraction of plasma. Sephadex fractionation of euglobulin fractions results in proactivator preparations that do not contain inhibitors.


2020 ◽  
Vol 53 (3) ◽  
pp. 88-106
Author(s):  
Taras Kuzio

This is the first comparative article to investigate commonalities in Ukrainian and Irish history, identity, and politics. The article analyzes the broader Ukrainian and Irish experience with Russia/Soviet Union in the first and Britain in the second instance, as well as the regional similarities in conflicts in the Donbas region of Eastern Ukraine and the six of the nine counties of Ulster that are Northern Ireland. The similarity in the Ukrainian and Irish experiences of treatment under Russian/Soviet and British rule is starker when we take into account the large differences in the sizes of their territories, populations, and economies. The five factors that are used for this comparative study include post-colonialism and the “Other,” religion, history and memory politics, language and identities, and attitudes toward Europe.


2010 ◽  
Vol 1 (3) ◽  
pp. 336-361 ◽  
Author(s):  
Ophir Münz-Manor

The article presents a contemporary view of the study of piyyut, demonstrating that Jewish poetry of late antiquity (in Hebrew and Aramaic) was closely related to Christian liturgical poetry (both Syriac and Greek) and Samaritan liturgy. These relations were expressed primarily by common poetic and prosodic characteristics, derived on the one hand from ancient Semitic poetry (mainly biblical poetry), and on the other from innovations of the period. The significant connections of content between the different genres of poetry reveal the importance of comparative study. Thus the poetry composed in late antiquity provides additional evidence for the lively cultural dialogue that took place at that time.


Author(s):  
Diana Carmenza Sánchez Botero ◽  
Nancy Milena Valencia Yepes

ABSTRACTThis document approach the research phase of the Master's degree in mathematics didactics at the Caldas University, called comparative study between universal learning design and conventional methods as a strategy for strengthening spatial thinking and geometric systems in the children of the first grade of the Institución Educación Nuestra Señora del Rosario in Manzanares, (Caldas). The objective of this preliminary analysis is to evaluate the effectiveness of learning through the DUA and compare it with the traditional method.RESUMENEste documento abordó la fase de indagación del trabajo de grado de la Maestría en didáctica de la matemática de la Universidad de Caldas, denominado estudio comparativo entre el diseño universal de aprendizaje y los métodos convencionales como estrategia para el fortalecimiento del pensamiento espacial y los sistemas geométricos en los niños del grado primero de la Institución educativa Nuestra Señora del Rosario del municipio de Manzanares, (Caldas). El objetivo de este análisis preliminar consistió en evaluar la eficacia del aprendizaje por medio del DUA y compararlo con el método tradicional.


2017 ◽  
Vol 21 (3) ◽  
pp. 208-223
Author(s):  
Byung Mun Lee

Purpose The purpose of this paper is to describe and analyze the rules on the formation of contracts under Korean law and the Contracts for the International Sale of Goods (CISG) in a comparative way and introduce the relevant proposed rules under the Amendment Draft of the Korean Civil Code (KCC). In addition, it attempts to compare and evaluate them in light of the discipline of comparative law. Design/methodology/approach In order to achieve the purposes of the study, it executes a comparative study of the rules as to the formation of contracts of the CISG, Korean law and the Amendment Draft of the KCC. The basic question for this comparative study is placed on whether a solution from one jurisdiction is more logical than the others and to what extent each jurisdiction has responded to protect the reasonable expectations of the parties in the rules as to the formation of contracts. Findings The comparative study finds that most of the rules under the CISG are quite plausible and logical and they are more or less well reflected in the proposals advanced by the KCC amendment committee. On the other hand, the other rules under the CISG which have brought criticisms in terms of their complexity and inconsistent case law invite us their revision or consistent interpretation. The drawbacks of the CISG have also been well responded in the Amendment Draft of the KCC. Nevertheless, it is quite unfortunate that the Amendment Draft of the KCC still has a rule that regards any purported performance with non-material alteration of the terms of an offer as an acceptance. Originality/value This study may provide legal and practical advice to both the seller and the buyer when they enter into a contract for international sales of goods. In addition, it may render us an insight into newly developed or developing rules in this area and show us how they interact with each other. Furthermore, it may be particularly useful in Korea where there is an ongoing discussion for revision of the KCC.


2016 ◽  
Vol 2016 ◽  
pp. 1-9 ◽  
Author(s):  
Álvaro de Jesús Ruíz-Baltazar ◽  
Simón Yobanny Reyes-López ◽  
D. Larrañaga ◽  
R. Pérez

Nanoparticles of Ag with different sizes and structures were obtained and studied. Two methods for reductions of Ag ions were employed, chemical reduction by sodium borohydride and ethylene glycol. Cuboctahedral and icosahedral structures were obtained. Molecular simulations were carried out in order to evaluate the reactivity of both structures. On the other hand, the electrochemical activity and antibacterial effect (E. coli) of the cuboctahedral and icosahedral structures were measured experimentally. The results obtained by molecular simulation, cyclic voltammetry, and antibacterial effect were compared and discussed in this work.


2003 ◽  
Vol 28 (6) ◽  
pp. 568-570 ◽  
Author(s):  
S. GANGOPADHYAY ◽  
G. PACKER

A retrospective review of 24 patients with dorsal incisions for open reduction and internal fixation of Frykman VII/VIII distal radius fractures using a dorsal plate was performed. Half of them had a longitudinal incision while the other half had a T-shaped incision. No difference in the healing properties or wound morbidity could be demonstrated between the two groups. However, the T incision provided improved exposure of the distal radius and patient satisfaction with its cosmetic result was superior. The horizontal limb was well camouflaged within the transverse skin crease on the dorsal aspect of the wrist. The vertical limb did not extend into the dorsum of the hand and could, therefore, be hidden by appropriate clothing.


2013 ◽  
Vol 2013 ◽  
pp. 1-6 ◽  
Author(s):  
Pradeep Paliwal ◽  
Srinivasa Rao Jetti ◽  
Anjna Bhatewara ◽  
Tanuja Kadre ◽  
Shubha Jain

The reaction of 5,5-dimethylcyclohexane-1,3-dione with various heteroarylaldehydes afforded the corresponding heteroaryl substituted xanthene derivatives 1(a–f). The reaction proceeds via the initial Knoevenagel, subsequent Michael, and final heterocyclization reactions using 1,4-diazabicyclo[2.2.2]octane (DABCO) as a catalyst in aqueous media. The synthesized heteroaryl substituted xanthenes 1(a–f) reacted with malononitrile to obtain different alkylidenes 2(a–f). Short reaction time, environmentally friendly procedure, avoiding of cumbersome apparatus, and excellent yields are the main advantages of this procedure which makes it more economic than the other conventional methods.


1960 ◽  
Vol 16 (02) ◽  
pp. 147-151
Author(s):  
M. T. L. Bizley

The following method of solving a certain type of problem in permutations and combinations, and in probability, is so simple that it must have been used before. On the other hand, the writer has never seen it expounded in the following form, and it does not seem to be well known to students. Whilst, therefore, no originality is claimed, this note may be found of interest to readers; and they may care to compare the length of the solutions to the examples below with those to be found in the text-books employing more conventional methods.


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