117,344 research outputs found
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
A Semiempirical Computational Study Of Aziridinone And Diaziridinone Reactivity [estudo Químico-computacional Da Reatividade De Aziridinona E Diaziridinona Através De Cálculos Semi-empíricos]
No full textThe results of semiempirical molecular orbital calculations performed on aziridinone and diaziridinone employing the MNDO, AM1, and PM3 molecular models are presented. The AM1 method, which best reproduces ground-state molecular properties, is used to calculate electronic parameters and the use of these parameters for the evaluation of reactivity is discussed.2212225Fleming, I., (1976) Frontier Orbital and Organic Chemistry Reactions, , John Wiley & SonsLondonPross, A., (1995) Theoretical and Physical Principles of Organic Reactivity, , John Wiley & SonsNew YorkBarreiro, E.J., Rodrigues, C.R., Albuquerque, M.G., Sant'Anna, C.M.R., Alencastro, R.B., (1997) Quím. Nova, 20, p. 300Santos Filho, P.F., Kaiser, C.R., Momesso, M.A., (1994) J. Braz. Chem. Soc., 5, p. 97Roberto, D., Alper, H., (1984) Organometallics, 3, p. 1767Shimazu, M., Endo, Y., Shudo, K., (1997) Heterocycles, 45, p. 735Yosoff, M.M., Talaty, E.R., (1996) Tetrahedron Lett., 37, p. 8695Quast, H., Leybach, H., Wurthwein, E.-U., (1992) Chem. Ber., 125, p. 1249Treschanke, L., Rademacher, P., (1985) J. Mol. Struct. (Theochem), 23, p. 32Greenberg, A., Chiu, Y.-Y., Johnson, J.L., Liebman, J.F., (1991) Struct. Chem., 2, p. 117Cunha, S., Kascheres, A., (1996) J. Mol. Struct. (Theochem), 364, p. 45Dewar, M.J.S., Zoebisch, E.G., Healy, E.F., Stewart, J.J.P., (1985) J. Am. Chem. Soc., 107, p. 3902Stewart, J.J.P., (1989) J. Comp. Chem., 10, p. 209Dewar, M.J.S., Thiel, W., (1977) J. Am. Chem. Soc., 99, p. 4899SPARTAN 4.0, , Wavefunction, Inc., 18401 Von Karman, Suite 370, Irvine, California 92715Broyden, C.G., (1970) J. Inst. Math. Its Appl., 6, p. 222Fletcher, R., (1970) Comp. J., 13, p. 317Goldfarb, D., (1970) Math. Comput., 24, p. 23Shanno, D.F., (1970) Math. Comput., 24, p. 647Wang, A.H.-I., Paul, I.C., (1972) J. Chem. Soc. Chem. Comm., p. 43McGann, P.E., Groves, J.T., Greene, J.D., (1978) J. Org. Chem., 43, p. 922Treschanke, L., Rademacher, P., (1985) J. Mol. Struct. (Theochem), 23, p. 4
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
The role of admission surveillance cultures in patients requiring prolonged mechanical ventilation in the intensive care unit
No full textWe undertook a prospective observational cohort study in intensive care unit (ICU) patients requiring mechanical ventilation for four days or more to evaluate normal and abnormal bacterial carriage on admission detected by surveillance cultures of throat and rectum. We assessed the importance of surveillance and diagnostic cultures for the early detection of resistance to third generation cephalosporins employed as the parenteral component of the selective decontamination of the digestive tract. Finally, we sought the risk factors of abnormal carriage on admission to the ICU. During the 58-month study 621 patients were included: 186 patients (30%) carried abnormal flora including methicillin-resistant Staphylococcus aureus (MRSA) and aerobic Gram negative bacilli (AGNB) on admission to the ICU Both MRSA and AGNB carriers were more commonly present in the hospital group of patients than in patients referred from the community (P < 0.001), although overgrowth was equally present both in community and in hospital patients. The incidence of infections during ICU stay was higher in abnormal (n=120, 64.5%) than in normal carriers (n=185, 42.5%) (P < 0.0001), with an odds ratio of 2.46 (95% confidence interval 1.72 to 3.51). Third generation cephalosporins covered ICU admission flora in 482 (78%) of the studied population. AGNB resistant to cephalosporins and MRSA were detected in surveillance cultures of 139 patients (22%), while the same resistant micro-organisms were identified only in 49 diagnostic samples (7.9%). Parenteral cephalosporins were modified in patients with abnormal flora (P < 0.0001). One hundred and ninety-six patients received antibiotics before admission to the ICU and 42% carried AGNB resistant to cephalosporins. Previous antibiotic use was the only risk factor for abnormal carriage in the multivariate analysis (OR 3.5; 95% confidence interval 2.1 to 5.8). The knowledge of carriage on admission using surveillance cultures may help intensivists to identify patients with abnormal carriage on admission and resistant bacterial strains at an early stage even when diagnostic samples are negative. Third generation cephalosporins covered admission flora in about 80% of the enrolled population and were modified in patients with abnormal flora who received antibiotic therapy before ICU admission. Our finding of overgrowth present on admission may justify the immediate administration of enteral antimicrobials
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
Letter to Alfred L. Shoemaker, February 10, 1948
No full textA handwritten letter from an unknown author addressed to Alfred L. Shoemaker, dated February 10, 1948. Within, the author discusses the Pennsylvania Dutch word for Ash Wednesday, along with traditions associated with this day.https://digitalcommons.ursinus.edu/shoemaker_documents/1118/thumbnail.jp
- …
