196,108 research outputs found
2-DIMENSIONAL ORIENTATIONAL MOTION AS A MULTICHANNEL REACTION BY COMPUTER-SIMULATION
No full textThe orientational diffusion of a nitrogen molecule N-2 in a three-dimensional crystal of argon atoms is studied by using the reaction coordinate formalism and the Bennett-Chandler approach. To study the two-dimensional orientational diffusion the reaction coordinate formalism has to be generalized to multichannel reactions. The rate coefficient for the motion between the six stable orientational states is determined from correlation function expressions, which include corrections to transition-state theory due to recrossings of free energy barriers. At high temperatures the simulation results are compared with results obtained by standard molecular dynamics methods. At low temperatures the transmission coefficient is computed and the dependence of the plateau value upon the density of the surrounding argon matrix and upon the isotopes, chosen to form the N-2 molecule, is investigated. (C) 1995 American Institute of Physics
Influence of breed, handler appearance and people's experience of dogs on their perception of the temperament of a breed of dog in Ireland
No full textIntroduction: Human attitudes to and perception of dogs vary both between and within societies and cultures and are influenced by many factors including factors unrelated to the dog such as it’s environment. These include cultural factors, personal knowledge, the function of the animal, the perceived intelligence and the appearance of the dog. It is known that the presence of a dog can influence perceptions of the handler but it has not been established whether the characteristics of the handler can influence the perception of the dog. This is especially pertinent to the area of working dogs. German shepherd dogs tend to have a negative image and may be under utilized in assistance dog work due to concerns regarding the public perception of this breed.Methodology: The research was by a questionnaire survey of students at Cork Institute of Technology. Respondents were asked to rate photographs of three breeds of dog alone and to then rate the same dogs with three of fifteen possible categories of “owner”, prior to completing the questionnaire. 463 questionnaires were completed. Results: There was a difference in mean rating for temperament for a dog alone and for the same dog with a handler, and there were between breed differences. Different dog breeds were rated significantly differently (Wilkes Lambda = 0.187, F (13,374) = 125.053 P = .000). There was a significant effect of handler on the perception of the Labrador (LR)(F (14,462) = 8.589 P = .000), of the German shepherd (GSD)(14,462) = 6.513 P = .000) and of the Airedale terrier (AT)(F (14,461) = 7.587 P = .000) The handler categories, which appeared to influence perception most, were the Garda (Police)(male(m) and female(f)); rough male; wheel chair user (m and f); blind person (m and f). Pearson’s correlations revealed consistency in ratings throughout the questionnaire, with or without a visual representation for the LR and for the GSD but not for the AT. The LR has a positive image. The GSD while perceived as having a negative image, appears to have an altered image when seen in a working context, where people described it inferring intelligence and admirable character. The AT is uncommon in Ireland and without media association. This may explain the inconsistencies in ratings when presented either with or without a visual image.Conclusions: People’s perception of the temperament of a breed of dog may be influenced by the breed, by the appearance of the handler and by their experience and knowledge of dogs. The results appear consistent, that is, respondents perceived that the three breeds of dog were either more friendly or less friendly, when presented with certain differing categories of handler
Detection of concealed structural heart disease by imaging in patients with apparently idiopathic premature ventricular complexes: A review of current literature
No full textBackground: Premature ventricular complexes (PVCs) are the most common form of ventricular arrhythmia in the general population. While in most cases PVCs represent a primitive phenomenon with benign behavior, in a non-negligible proportion of subjects frequent PVCs may be epiphenomenon of underlying occult heart diseases, requiring special medical attention since they have been resulted linked to increased total and cardiac mortality. Nevertheless, PVCs themselves, when incessantly frequent, may be responsible for left ventricular dysfunction in otherwise normal heart. Aim of this narrative review is to update current knowledge on the general approach to patients with frequent PVCs on the basis of available data, with a special focus on the value of imaging. Hypothesis: Routine diagnostic work-up not infrequently miss subtle concealed arrhythmic substrate, leading to erroneously refer to such arrhythmias as to “idiopathic”. Methods: Literature search of PVCs articles was conducted in PubMed and Scopus electronic database. Results: Conflicting data arise from literature about the true clinical significance of idiopathic PVCs. There is growing body of data providing evidence that more advanced non-invasive imaging modalities, such as cardiac magnetic resonance, have an incremental diagnostic and prognostic value. On the other hand, in some cases the prognostic significance of isolated subtle myocardial structural abnormalities in patients with PVCs, still remains area of uncertainty. Conclusion: In selected subjects with PVCs and high-risk features for concealed arrhythmic substrate, traditional assessment to rule out the presence of heart disease, including surface ECG and transthoracic echocardiography, should be implemented with more advanced cardiovascular imaging modalities
Dr. Duane M. Jackson, Morehouse College, July 2011
No full textThis video is a conversation with Dr. Duane M. Jackson. Dr. Jackson talks about his paper, "Recall and the Serial Position Effect: The Role of Primacy and Recency on Accounting Students' Performance." Jackie Daniel, AUC Woodruff Library, is the interviewer
"Reflections on the subject of Emigration from Europe with a view to Settlement in the United States" By M. Carey.
No full text"Reflections on the subject of Emigration from Europe with a view to Settlement in the United States: containing bried sketches of the moral and political character of those states.
By M. Carey, member of the American philosophical, and of the American Antiquarian Society, and author of The Olive Branch, Cindiciae Hibernicae, essays on banking, on political economy, and on internal improvement.
To which are now added the English editor's comments on the subject; together with Important Advice to Emigrants, and Cautions Against Impositions Practiced in the Outports
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
Dr. Glendon Swarthout
No full textHosted by Roger M. Busfield, MSU Assistant Professor of Speech and Theater, Meet the Author is designed to introduce a general audience to a contemporary author and their work through in-depth interviews. This episode features a conversation between Dr. Glendon Swarthout, prolific author and English professor at MSU, and assistant professors Sam S. Baskett and Theodore B. Strandness
Impact of the COVID-19 lockdown on the arrhythmic burden of patients with implantable cardioverter-defibrillators
No full textBackground: In Italy, a nationwide full lockdown was declared between March and May 2020 to hinder the novel coronavirus disease 2019 (COVID-19) pandemic. The potential individual health effects of long-term isolation are largely unknown. The current study investigated the arrhythmic consequences of the COVID-19 lockdown in patients with defibrillators (ICDs) living in the province of Ferrara, Italy. Methods: Both the arrhythmias and the delivered ICD therapies as notified by the devices were prospectively collected during the lockdown period (P1) and compared to those occurred during the 10 weeks before the lockdown began (P2) and during the same period in 2019 (P3). Changes in outcome over the three study periods were evaluated for significance using McNemar's test. Results: A total of 413 patients were included in the analysis. No differences were found concerning either arrhythmias or shocks or anti-tachycardia pacing. Only the number of patients experiencing non-sustained ventricular tachycardias (NSVTs) during P1 significantly decreased as compared to P2 (p = 0.026) and P3 (p = 0.009). The subgroup analysis showed a significant decrease in NSVTs during P1 for men (vs. P2, p = 0.014; vs. P3, p = 0.040) and younger patients (vs. P2, p = 0.002; vs. P3, p = 0.040) and for ischemic etiology (vs. P2, p = 0.003). No arrhythmic deaths occurred during P1. Conclusions: The complete nationwide lockdown, as declared by the Italian government during the first COVID-19 pandemic peak, did not impact on the incidence of arrhythmias in an urban cohort of patients with ICDs
Candida endocarditis and the impact of antifungal treatment on the corrected QT interval: a case report
No full textCandida endocarditis represents a life-threatening infection with high mortality rates despite adequate antifungal treatment. Step-down oral treatment with fluconazole or voriconazole represents a treatment option for clinically stable patients. Drug toxicity, however, is reported during azole therapy and can be challenging, especially among patients with multiple comorbidities. This is the first report that highlights the impact of isavuconazole on the corrected QT interval and liver toxicity in a cirrhotic patient with Candida endocarditis
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