A Novel Equidistant-Scattering-Based Cluster Index

2018 ◽  
Author(s):  
Caio Flexa ◽  
Reginaldo Santos ◽  
Walisson Gomes ◽  
Claudomiro Sales
Keyword(s):  
Cluster Index

DEVELOPING A NEW DEFECT CLUSTER INDEX

2008 ◽  
Vol 25 (1) ◽  
pp. 18-30 ◽  
Author(s):  
Wen-Jie Tsai ◽  
Lee-Ing Tong ◽  
Chung-Ho Wang
Keyword(s):  
Defect Cluster ◽  
Cluster Index

scholarly journals The Implementations of K-medoids Clustering for Higher Education Accreditation by Evaluation of Davies Bouldin Index Clustering

Kursor ◽  
2020 ◽  
Vol 10 (3) ◽  
Author(s):  
Ghufron Ghufron ◽  
Bayu Surarso ◽  
Rahmat Gernowo
Keyword(s):  
Higher Education ◽  
Data Analysis ◽  
Tertiary Education ◽  
Big Data Analysis ◽  
Study Program ◽  
Tertiary Institutions ◽  
Weighting Matrix ◽  
Cluster Index ◽  
Cluster Data ◽  
Good Cluster

The need for data analysis in tertiary education every semester is needed, this is due to the increasingly large and uncontrolled data, on the other hand generally higher education does not yet have a data warehouse and big data analysis to maintain data quality at tertiary institutions is not easy, especially to estimate the results of university accreditation high, because the data continues to grow and is not controlled, the purpose of this study is to apply k-medoids clustering by applying the calculation of the weighting matrix of higher education accreditation with the data of the last 3 years namely length of study, average GPA, student and lecturer ratio and the number of lecturers according to the study program, so that it can predict accurate cluster results, the results of this study indicate that k-medoid clustering produces good cluster data results with an evaluation value of the Bouldin index davies cluster index of 0.407029478 and is said to be a good cluster result.

scholarly journals Neutrophil Adhesion to Fibrinogen and Fibrin Under Flow Conditions Is Diminished by Activation and L-Selectin Shedding

Blood ◽  
1997 ◽  
Vol 89 (6) ◽  
pp. 2131-2138 ◽  
Author(s):  
P.H.M. Kuijper ◽  
H.I. Gallardo Torres ◽  
J.A.M. van der Linden ◽  
J.-W.J. Lammers ◽  
J.J. Sixma ◽  
...  
Keyword(s):  
Polymorphonuclear Leukocytes ◽  
Random Distribution ◽  
Neutrophil Adhesion ◽  
Shear Stresses ◽  
Flow Conditions ◽  
Neuraminidase Treatment ◽  
Cluster Index ◽  
Custom Made ◽  
Static Conditions ◽  
Β2 Integrins

Abstract The adhesion of neutrophils (polymorphonuclear leukocytes [PMNs]) to immobilized fibrinogen/fibrin is mediated by β2-integrins. However, the influence of physiologic flow conditions on neutrophil adhesion to these surfaces is poorly defined. In this report, the effect of flow and neutrophil activation on adhesion to immobilized fibrinogen and fibrin was examined. For the evaluation of (the distribution of ) neutrophil adhesion, real-time video-assisted microscopy and custom-made software were used. Under flow conditions, adherent neutrophils appeared to support the subsequent margination of other neutrophils, thereby enhancing the adherence of these cells to fibrin. Consequently, neutrophils adhered in clusters, especially at higher shear stresses (eg, cluster index 1.4 at shear 80 mPa). Preactivation of PMNs with fMLP (10−7 mol/L) or 4β-phorbol, 12-myristate, 13-acetate (PMA; 100 ng/mL) resulted in approximately 50% inhibition of adhesion to fibrin and a more random distribution (cluster index <0.5). L-selectin antibodies or neuraminidase treatment of PMNs also inhibited adhesion and clustering, indicating a role for L-selectin. Under static conditions, no clustering appeared and PMN activation with fMLP or PMA caused threefold and sevenfold increased adhesion, respectively. Under these conditions, anti–L-selectin antibodies or neuraminidase did not affect adhesion. These results indicate that, under flow conditions, adherent neutrophils support adhesion of flowing neutrophils by L-selectin–mediated cell-cell interactions. Preactivated neutrophils, with lowered L-selectin expression, are less susceptible for this interaction. By this mechanism, adhered leukocytes can modulate the recruitment of leukocytes to the vessel wall at sites of inflammation.

Effect of Multimodal Stimulus Presentation on Recall

1994 ◽  
Vol 78 (1) ◽  
pp. 320-322 ◽  
Author(s):  
David A. Kobus ◽  
John D. Moses ◽  
Eaye Alvarado Bloom
Keyword(s):  
Classroom Environment ◽  
Stimulus Presentation ◽  
Simultaneous Presentation ◽  
Spoken Word ◽  
Multiple Modalities ◽  
Cluster Index ◽  
Group A ◽  
Resource Hypothesis ◽  
Multiple Resource ◽  
Printed Word

This study was conducted to investigate how the mode of stimulus presentation affects recall in the classroom environment. 289 undergraduates were randomly assigned to one of 7 experimental groups. All subjects were presented the same stimuli in one of 7 possible modes: (1) Printed Word, (2) Spoken Word, (3) Picture, (4) Printed Word + Spoken Word, (5) Picture + Spoken Word, (6) Picture + Printed Word, and (7) Printed Word, Picture + Spoken Word. 30 words, 6 from each of 5 categories, were presented to each group. A new stimulus was presented every 5 sec. Subjects were to recall (in writing) as many stimuli as possible in 5 min. regardless of order. One-way between-groups analyses of variance were conducted on recall and cluster index scores. A significant main effect of mode of presentation showed that recall was best for the Picture or multimodal group (Printed Word, Picture + Spoken Word). Groups receiving only the spoken or printed word showed significantly poorer recall than the multimodal groups. No statistically significant differences between groups were found on the cluster index score. It appears that the simultaneous presentation of redundant stimuli in multiple modalities does support the multiple-resource hypothesis by displaying enhanced recall when information is available from multiple attentional resources.

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