7,201 research outputs found
Henry Patterson Gill photograph
No full textCarte de visite of Pvt. Henry Patterson Gill, who served with Companies B & C of the 148th Ohio Volunteer Infantry. Company B was recruited from Washington County, Ohio, and Company C was recruited from Vinton County, Ohio. Gill was originally from Liberty Township, Washington County, Ohio
Competing conventions: The Big Branders’ struggle to incorporate new quality conceptions in the Norwegian food market
No full textThe paper addresses recent changes in the Norwegian agrifood industry from the analytical perspective of quality conventions. Storper and Salais’ “worlds of production” plus Boltanski and Thévenots’ “orders of worth” are used as a basis for the empirical study. First, the paper discusses how the largest Norwegian branders try to strategically adapt to “novel” quality attributes like health-enhancing food, origin/terroir, environmental sustainability and ethics. Second, the paper investigates the companies’ quality signalling strategy: How are these “novel” qualities communicated to consumers? Multiple options are available: Do they attempt to systematically incorporate “novel qualities” into their private brand equity (“conventionalizing qualities”)? Do they prefer a co-labelling scheme with a third party control, or do they use any other measures for quality signalling? The paper thereby discusses how the largest Norwegian branders in the food sector cope with conflicting and competing quality conventions.Food quality, economics of convention., Food Consumption/Nutrition/Food Safety,
Electrophysiology of the atrio-AV nodal inputs and exits in the normal dog heart: radiofrequency ablation using an epicardial approach
No full textAblation of Atrionodal Connections. Introduction: We studied the effects of selective and combined ablation of the fast (FP) and slow pathway (SP) on AV and VA conduction in the normal dog heart using a novel epicardial ablation technique.
Methods and Results: For FP ablation, radiofrequency current (RFC) was applied to a catheter tip that was held epicardially against the base of the right atrial wall. SP ablation was performed epicardially at the crux of the heart. Twenty-three dogs were assigned to two ablation protocols: FP/SP ablation group (n = 17) and SP/FP ablation group (n = 6). In 12 of 17 dogs, FP ablation prolonged the PR interval (97 +/- 10 to 149 +/- 22 msec, P < 0.005) with no significant change in anterograde Wenckebach cycle length (WBCL). Subsequent SP ablation performed in 8 dogs further prolonged the PR interval and the anterograde WBCL (117 +/- 22 to 193 +/- 27, P < 0.005). Complete AV block was seen in 1 of 8 dogs, whereas complete or high-grade VA block was seen in 6 of 8 dogs. In the SP/FP ablation group, SP ablation significantly increased WBCL with no PR changes. Combined SP/FP ablation in 6 dogs prolonged the PR interval significantly, but no instance of complete AV block was seen. VA block was found in 50% of these cases. Histologic studies revealed that RFC ablation affected the anterior and posterior atrium adjacent to the undamaged AV node and His bundle.
Conclusion: Using an epicardial approach, combined ablation of the FP and SP AV nodal inputs can be achieved with an unexpectedly low incidence of complete AV block, although retrograde VA conduction was significantly compromised
U.S. Marine Corps AV-8B Harrier
No full textA U.S Marine Corps AV-8B during a vertical takeoff. It arrived at Wright-Patterson Air Forces base form Cherry Point Marine Cops Air Station with 11 other Harries to talk to the Air Force about the advantages of vertical take-off/landing aircraft (VSTOL).https://corescholar.libraries.wright.edu/special_ms458_photographs_air_force_history/1028/thumbnail.jp
The sophisticated architecture of the rat atrioventricular node
No full textIn the mammalian heart, the action potential spontaneously generated in the sinoatrial (SA) node propagates through the atria to reach the atrioventricular (AV) node. As the only conduction pathway between the atria and ventricles, the AV node functions to delay and regulate action potential conduction between the atria and ventricles. Since Tawara described the anatomical and morphological characteristics of the AV node in 1906, it has been difficult to correlate electrophysiological recordings with distinct cell types and the three dimensional
structure of the AV node due to the exceptional functional and architectural complexity of this region. The cardiac voltage-gated Na+ channel isoform (Na1.5) is known to play a major role in the generation and conduction of the action potential in the heart. Recently, various mutations of
Na, 1.5 responsible for AV conduction block and Na,, 1.5+/- mice with impaired AV conduction have been reported. Various neuronal Na' channel isoforms have also been shown to be expressed in the heart (mouse ventricular myocytes and rat and mouse SA node) and to be functionally important. The distribution of neuronal Na channel isoforms in the AV node is unknown. The aim of this study was to investigate the distribution of cardiac and neuronal Na'channel isoforms in and around the AV node.
The nodal cell region was identified by Masson's trichrome staining and confocal microscopy with immunohistochemical markers, such as connexin43 (Cx43), desmoplakin(DP), atrial natriuretic peptide (ANP) and the type 4 hyperpolarization-activated cyclic nucleotide-gated cation (HCN) channel. The unique pattern of expression in the nodal cell region (DP-positive/Cx43-negative/ANP-negative/HCN4-positive) allowed it to be distinguished from the surrounding working myocardium (DP-positive/Cx43-positive/HCN4-negative).
I have investigated the expression of Na,1.5 and other Na+ channel isoforms in rat AV node. Na1.1 was distributed in a similar manner to Na1.5, Na1.2 was not detected. Na1.3
labelling was restricted to nerve fibres and nerve cell bodies and was not detected in myocytes.Na1.3 labelling was abundant in the enclosed node and the common bundle, but much less abundant in other regions. Na1.4, the skeletal isoform, was not studied. Na1.5 labelling was present in atrial and ventricular myocardium and the left bundle branch (right not studied). However, Na1.5 labelling was absent in the open node, the enclosed node and the common
bundle, but present at a reduced level in the posterior nodal extension, transitional cells and AV ring bundle. Na 1.6 was not detected.
The study has revealed a complex organisation of three different myocyte types at the AV junction (including the tricuspid annulus). Impaired AV conduction as a result of mutations in or loss of Na1.5 must be the result of impaired conduction in the AV node inputs (posterior
nodal extension and transitional cells) or output (bundle branch) rather than the AV node itself (open and enclosed nodes)
The Worldview and the Author´s (Self)Reflection in Czech Contemporary Historiography
No full textCílem studie je představit možnosti, jak na základě publikovaných autorských textů zkoumat světový názor historiků a historiček, zejména v oboru soudobých dějin, kde lze předpokládat vliv jejich hodnotového horizontu na interpretaci relativně nedávné minulosti. Autor nejprve vymezuje pojetí světového názoru vzhledem ke stanovenému záměru a zdůvodňuje analytické užití tohoto pojmu v historiografickém textu, v daném kontextu se také zamýšlí nad vztahem paměti, dějin a historiografie. Konstatuje, že poměrně málo českých historiků a historiček dosud reflektuje vztah (individuální či kolektivní) paměti a práce dějepisce, zvláště s ohledem na jeho pozici v současné společnosti, která bývá často redukována na roli objektivního „objevitele historické pravdy“. Taková (sebe)reflexe předpokládá přiznání vlivu individuálního světového názoru historika (komplexu názorů a postojů formovaných výchovou, vzděláním, vzpomínkami, generační příslušností a podobně) na jeho vědeckou činnost. Autor studie nabízí dvě možné a vzájemně se doplňující cesty k poznání historikova světového názoru: jednak prostřednictvím vlastních svědectví a prohlášení z jeho osobněji laděných textů a egodokumentů (eseje, rozhovory, vzpomínky, příspěvky na sociálních sítích), jednak analýzou jeho vědeckých textů (časopiseckých studií, knižních monografií, recenzí). Oba přístupy autor dokumentuje na konkrétních příkladech z produkce historiků a historiček českých soudobých dějin. V závěru studie pak nastiňuje cíle a smysl zkoumání historikova světového názoru.The aim of this study is to present the opportunities for research into the worldview of historians, especially historians focused on contemporary history, where it can be assumed that their set of values may influence their interpretation of the rela-tively recent past. The author first defines the notion of worldview and justifies the analytical use of this concept in historiographical texts. He also considers the relationship between memory, history and historiography in the given context. The author states that not many Czech historians have so far reflected on the relationship between (individual and collective) memory and the work of the historian, especially with regard to his or her position in contemporary society, which is often reduced to the role of an objective “discoverer of historical truth”. Such (self)reflection presupposes the acknowledgement of the influence of the historian’s individual worldview (a complex of opinions and attitudes shaped by upbringing, education, memories, generational affiliation and so on) on his or her scholarly activity. The author of the study offers two possible and complementary ways to learn about the historian’s worldview: first, through his or her own testimonies and statements from more personal texts and ego-documents (essays, interviews, memoirs or social me-dia posts), and second, through the analysis of his or her scholarly texts (journal studies, monographs and book reviews). The author demonstrates both approaches with concrete examples of works by historians of Czech contemporary history and concludes by outlining the aims and purpose of examining the historian’s worldview. © 2022, Institute of Contemporary History of the Czech Academy of Sciences. All rights reserved
Inventering av biologiskt kulturarv
No full textFältmanual till biologiskt kulturarv Föreliggande skrift är framför allt en fältmanual till biologiskt kulturarv (och ett urval av andra biologiska kulturbärare), en checklista med bilder och beskrivningar. Det tar också upp några aspekter på själva metodiken för inventering, kartering och tolkning. Fältmanualen omfattar de vanligaste aspekterna av biologiskt kulturarv som man kan hitta i svenska landskap från söder till norr. Listan beskriver biologiskt kulturarv huvudsakligen från nivåerna egenskaper, individer och artförekomster enligt RAÄ:s indelning
Skolsköterskans erfarenhet av kvinnlig könsstympning
No full textBakgrund: Kvinnlig könsstympning eller FGM (Female Genital Mutilatilation) på flickor innebär att hela eller delar av de yttre könsorganen skadas eller skärs bort. Det är en tradition som förekommer främst i Afrika och några länder i Mellanöstern och Asien. Invandring har gjort att traditionen har tagits med till Västvärlden och WHO beräknar att över 200 miljoner kvinnor över hela världen är könsstympade. Det finns barn i svenska skolor som genomgått FGM och som skolsköterskan möter i sitt arbete. Det är därför viktigt för skolsköterskor att söka kunskap och förstå de kulturella skillnaderna för att kunna ge stöd till olika grupper. Syftet: Att beskriva skolsköterskans erfarenhet av kvinnlig könsstympning i mötet med elever. Metod: Studien består av kvalitativa intervjuer med 13 skolsköterskor i två län i södra Sverige. Kvalitativ innehållsanalys med induktiv ansats användes som analysmetod. Resultatet: Det framkommer tre kategorier i studien: varierande kompetens, stora utmaningar och tillgängliga arbetsverktyg. Slutsatser: Studien visar att hälsosamtalet är ett bra arbetsverktyg, att ämnet är bättre uppmärksammat nu än vad det var för några år sedan samt att arbetet runt könsstympning kan förbättras ytterligare
Generalized Kronrod Patterson type imbedded quadratures
No full textsummary:We present algorithms for the determination of polynomials orthogonal with respect to a positive weight function multiplied by a polynomial with simple roots inside the interval of integration. We apply these algorithms to search for and calculate all possible sequences of imbedded quadratures of maximal polynomials order of precision for the generalized Laguerre and Hermite weight functions
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