An Extension of the Random Error Coefficient of Agreement to N x N Tables

1979 ◽  
Vol 134 (6) ◽  
pp. 617-619 ◽  
Author(s):  
Cynthia L. Janes

SummaryMaxwell has proposed the Random Error Coefficient of Agreement (RE), as a measure of agreement for the binary case based upon the assumption of random distribution of questionable cases. The present paper presents a more general formula for RE's computation and shows how the new form is applicable to cases with more than two response categories.

2020 ◽  
Vol 89 (3) ◽  
pp. 347-378
Author(s):  
Jimmy Patiño

This article examines the 1931 desegregation case based in Southeast San Diego County, Roberto Alvarez v. Lemon Grove Independent School District, through the lens of the deportation regime. This analysis reveals the ways new pressures from deportation-based immigration policies initiated in the 1920s complicated widely shared notions of transnational Mexicano identity and emphasized differences in nativity and citizenship status. The practice of apprehending individuals identified as “illegal aliens” took on a new form during the repatriation efforts of the Great Depression—removal. Within this new context, this article highlights the significance of the fact that working-class Mexican-origin migrant parents mobilized to demand educational equality for their children and to reject segregation. It illuminates how the Lemon Grove Mexican-origin community gave expression to a more expansive notion of their anti-segregation worldview than that found in the court ruling. They envisioned a community that was transnational and inclusive regardless of citizenship status, and they challenged segregation beyond mere claims to whiteness, critiquing inequality of resources with little reference to assimilationist goals.


2019 ◽  
Vol 42 ◽  
Author(s):  
Laurel Symes ◽  
Thalia Wheatley

AbstractAnselme & Güntürkün generate exciting new insights by integrating two disparate fields to explain why uncertain rewards produce strong motivational effects. Their conclusions are developed in a framework that assumes a random distribution of resources, uncommon in the natural environment. We argue that, by considering a realistically clumped spatiotemporal distribution of resources, their conclusions will be stronger and more complete.


Author(s):  
W. H. Zucker ◽  
R. G. Mason

Platelet adhesion initiates platelet aggregation and is an important component of the hemostatic process. Since the development of a new form of collagen as a topical hemostatic agent is of both basic and clinical interest, an ultrastructural and hematologic study of the interaction of platelets with the microcrystalline collagen preparation was undertaken.In this study, whole blood anticoagulated with EDTA was used in order to inhibit aggregation and permit study of platelet adhesion to collagen as an isolated event. The microcrystalline collagen was prepared from bovine dermal corium; milling was with sharp blades. The preparation consists of partial hydrochloric acid amine collagen salts and retains much of the fibrillar morphology of native collagen.


Author(s):  
K.R. Porter

Most types of cells are known from their structure and overall form to possess a characteristic organization. In some instances this is evident in the non-random disposition of organelles and such system subunits as cisternae of the endoplasmic reticulum or the Golgi complex. In others it appears in the distribution and orientation of cytoplasmic fibrils. And in yet others the organization finds expression in the non-random distribution and orientation of microtubules, especially as found in highly anisometric cells and cell processes. The impression is unavoidable that in none of these cases is the organization achieved without the involvement of the cytoplasmic ground substance (CGS) or matrix. This impression is based on the fact that a matrix is present and that in all instances these formed structures, whether membranelimited or filamentous, are suspended in it. In some well-known instances, as in arrays of microtubules which make up axonemes and axostyles, the matrix resolves itself into bridges (and spokes) between the microtubules, bridges which are in some cases very regularly disposed and uniform in size (Mcintosh, 1973; Bloodgood and Miller, 1974; Warner and Satir, 1974).


Author(s):  
Corazon D. Bucana

In the circulating blood of man and guinea pigs, glycogen occurs primarily in polymorphonuclear neutrophils and platelets. The amount of glycogen in neutrophils increases with time after the cells leave the bone marrow, and the distribution of glycogen in neutrophils changes from an apparently random distribution to large clumps when these cells move out of the circulation to the site of inflammation in the peritoneal cavity. The objective of this study was to further investigate changes in glycogen content and distribution in neutrophils. I chose an intradermal site because it allows study of neutrophils at various stages of extravasation.Initially, osmium ferrocyanide and osmium ferricyanide were used to fix glycogen in the neutrophils for ultrastructural studies. My findings confirmed previous reports that showed that glycogen is well preserved by both these fixatives and that osmium ferricyanide protects glycogen from solubilization by uranyl acetate.I found that osmium ferrocyanide similarly protected glycogen. My studies showed, however, that the electron density of mitochondria and other cytoplasmic organelles was lower in samples fixed with osmium ferrocyanide than in samples fixed with osmium ferricyanide.


Author(s):  
M.K. Lamvik ◽  
L.L. Klatt

Tropomyosin paracrystals have been used extensively as test specimens and magnification standards due to their clear periodic banding patterns. The paracrystal type discovered by Ohtsuki1 has been of particular interest as a test of unstained specimens because of alternating bands that differ by 50% in mass thickness. While producing specimens of this type, we came across a new paracrystal form. Since this new form displays aligned tropomyosin molecules without the overlaps that are characteristic of the Ohtsuki-type paracrystal, it presents a staining pattern that corresponds to the amino acid sequence of the molecule.


2016 ◽  
Vol 22 ◽  
pp. 48-49
Author(s):  
Amy Larkin ◽  
Colleen Healy ◽  
Anne Le

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