117,919 research outputs found
Fatigue crack shielding in plain bearings under large scale yielding
No full textMulti-layered bearing systems used in the automotive industry show shielding and antishielding effects that reduce or amplify the crack driving force under large-scale yielding conditions. Using finite element analysis, it is shown that shielding in such systems results in path deflection and bifurcation despite the absence of mixed-mode loading. As the crack approaches a stiff layer, the tangential strains measured around a blunted crack tip model show a maximum corresponding to the direction of crack propagation. The distribution of such strains indicates the effect of shielding and the likelihood of the tip to deflect or bifurcate.The suitability of bi-layer and tri-layer bearing architectures is assessed through crack path and respective crack driving force prediction
sj-docx-1-cnr-10.1177_10547738231191655 – Supplemental material for Symptom Clusters in Adults with Post-COVID-19: A Cross-Sectional Survey
No full textSupplemental material, sj-docx-1-cnr-10.1177_10547738231191655 for Symptom Clusters in Adults with Post-COVID-19: A Cross-Sectional Survey by Janet L. Larson, Weijiao Zhou, Philip T. Veliz and Sheere Smith in Clinical Nursing Research</p
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
Square Dancing with the Stars to Enhance Dynamic Hirschman Linkages?
No full textIn this Presidential Address, the author takes the reader on a reconnaissance of his life and time as a regional scientist. He points out scenery he found scintillating along the way, hoping that some may pick up the banner and chew on a few of the ideas for a while. He suggests a revisit to Albert O. Hirschman’s notion of key sectors and more empirical analysis related to Marcus Berliant’s and Masahisa Fujita’s notion of knowledge creation and transfer.Presidential Address, San Antonio, Texas, March 29, 2014 (53rd Meetings of the Southern Regional Science Association
Appropriate Similarity Measures for Author Cocitation Analysis
No full textWe provide a number of new insights into the methodological discussion about author cocitation analysis. We first argue that the use of the Pearson correlation for measuring the similarity between authors’ cocitation profiles is not very satisfactory. We then discuss what kind of similarity measures may be used as an alternative to the Pearson correlation. We consider three similarity measures in particular. One is the well-known cosine. The other two similarity measures have not been used before in the bibliometric literature. Finally, we show by means of an example that our findings have a high practical relevance.information science;Pearson correlation;cosine;similarity measure;author cocitation analysis
Letter from unknown writer to Jesse L. Boyce
No full textLetter to Jesse L. Boyce from unknown author (possibly Jack) about the investigation into the powder magazine located in the Grand Canyon. Some personal news is included in the letter such as the writer's marriage to the daughter of C.A. Taylor, former Supervisor of Cochise County
Highly isolated populations of a lizard inhabiting sky islands: a challenge for conservation
No full textLas especies que habitan en las islas de los cielos son particularmente susceptibles al cambio climático y al cambio en el uso del suelo, procesos que impulsan la reducción de un área habitable ya de por sí limitada. A medida que la temperatura y los patrones de precipitación cambian hacia condiciones más áridas, el nicho climático de una especie determinada se reducirá en tamaño o se desplazará hacia latitudes más altas en el hemisferio sur. Por lo tanto, debería determinarse la capacidad de las especies para migrar si cambia la idoneidad climática y/o estructural de su hábitat, es decir, junto con su nicho climático. Esta tarea requiere una comprensión de la capacidad de dispersión de las especies.
Aquí, analizamos la estructura genética poblacional del lagarto endémico de Liolaemus nigroviridis utilizando SNPs y secuencias de ADN mitocondrial. Estudiamos la diferenciación genética poblacional y posibles cambios temporales utilizando datos históricos de secuencias de ADNmt y patrones de demografía poblacional en el tiempo. L. nigroviridis mostró una alta estructura genética poblacional entre montañas, lo que sugiere el efecto de barreras geográficas y una baja capacidad de dispersión que le impediría migrar junto con su nicho climático en escenarios futuros. Sin embargo, a una escala geográfica menor, L. nigroviridis presentó una capacidad de dispersión de al menos 1,2 km en un hábitat continuo.
Las poblaciones en la Cordillera de la Costa y en la localidad más septentrional de los Andes mostraron una reducción en los tamaños efectivos poblacionales en los últimos 1.000 años, posiblemente como resultado del cambio climático. Proponemos que, dado que la población de Cantillana en la Cordillera de la Costa es una entidad genética única en declive, geográficamente aislada y rodeada por una matriz antropizada, es una buena candidata para migración asistida.
Nuestro estudio aborda el desafío de conservar especies de las islas de los cielos explorando la diferenciación genética poblacional y los patrones de demografía poblacional a lo largo del tiempo en el contexto del cambio climático y del uso del suelo, proporcionando información esencial para la toma de decisiones
Dispelling the Myths Behind First-author Citation Counts
No full textWe conducted a full-scale evaluative citation analysis study of scholars in the XML research field to explore just how different from each other author rankings resulting from different citation counting methods actually are, and to demonstrate the capability of emerging data and tools on the Web in supporting more realistic citation counting methods. Our results contest some common arguments for the continued
use of first-author citation counts in the evaluation of scholars, such as high correlations between author rankings by first-author citation counts and other citation
counting methods, and high costs of using more realistic citation counting methods that are not well-supported by the ISI databases. It is argued that increasingly available digital full text research papers make it possible for citation analysis studies to go beyond what the ISI databases have directly supported and to employ more
sophisticated methods
Sarah L. Blum Author Visit - Warrior Nurse: PTSD and Healing
No full textHear Sarah L. Blum, author of Women Under Fire: Abuse in the Military, discuss her newest book, Warrior Nurse: PTSD and Healing followed by a Q&A and book signing.
Sarah L. Blum is a decorated Vietnam veteran who served as an operating room nurse during the intense fighting of 1967. In recognition of her service, she was awarded the Army Commendation Medal.
Sponsored by CWU Veterans Center and CWU Libraries.https://digitalcommons.cwu.edu/libraryevents/1252/thumbnail.jp
Lillian L. Lambert, Author, Speaker, and Entrepreneur
No full textLillian L. Lambert, Author, Speaker, and Entrepreneu
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