117,386 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
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
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
Impact of the walnut husk fly Rhagoletis completa (Cresson, 1929) ( Diptera: Tephritidae) on the development of walnut seed ( Juglans regia L.)
No full textOreh je gospodarsko pomembna drevesna vrsta zaradi lesa in plodov. V 1991 se je v Evropi pojavila tujerodna vrsta sadne muhe iz ZDA in Mehike in je monofag na rodu Juglans- orehova muha (Rhagoletis completa), ki povzroča gospodarsko škodo nasadom orehov. V zadnjih dveh desetletjih se pojavlja tudi v Sloveniji. Orehova muha povzroča škodo na orehih, kjer samica jajčeca izleže v zeleni del ploda, kar vodi do poškodb jedrc. Cilj magistrske naloge je bil preučiti učinek orehove muhe na kakovost jedrc domačega oreha in koristi uporabe koprene kot fizične zaščite. Raziskava, opravljena v nasadu orehov v Skrbljah, je bila osredotočena na vpliv orehove muhe na kakovost jedrc. V dveh opazovalnih letih (2020 in 2022) je bilo razvidno, da je negativni vpliv orehove muhe izrazit, pri čemer je bil leta 2022 opazen manjši učinek zaradi uporabe kopren kot preventivnega ukrepa. V obeh letih je bilo mogoče zaslediti, da imajo plodovi z večjo stopnjo poškodbe zaradi muhe tudi večjo verjetnost poškodovanih jedrc. Ugotovili smo, da je prisotnost ličink v mezokarpu povzročila počrnelost večine endokarpa plodov in semen. Naše ugotovitve prispevajo k razumevanju negativnega učinka prisotnosti orehove muhe v nasadih orehov. Te ugotovitve ne le razkrivajo neposredne finančne posledice, temveč nudijo tudi osnovo za razvijanje strategij zatiranja, s katerimi bi lahko zagotovili zdravje in produktivnost orehovih nasadov v prihodnosti.The walnut is an economically important tree species for its wood and fruits. In 1991, a non-native species of fruit fly from the USA and Mexico appeared in Europe and is a monophage of the genus Juglans - the nut fly (Rhagoletis completa), which causes economic damage to walnut plantations. In the last two decades, it has also appeared in Slovenia. The nut fly causes damage to walnuts where female lays eggs in the green part of the fruit, which leads to damage the kernels. The aim of the MSc thesis was to study the impact of nut fly presence on the kernel quality of domestic walnuts and the benefits of using a veil as a mechanical repellent. The study, carried out in a walnut grove in Skrblje, focused on the impact of the nut fly on the quality of the kernels. In the two observation years (2020 and 2022), it was found that the impact of the nut fly is pronounced, with a lower impact in 2022 because of the use of netting as a preventive measure. In both years, it was observed that fruits with a higher level of fly damage were also more likely to have damaged kernels. We found that parasitisation caused blackening of most of the endocarp and the seed. Our findings help to elucidate the understanding of the negative impact of the nut fly in walnut groves. These findings not only reveal the direct economic costs, but also provide a basis for developing control strategies that could ensure the health and productivity of walnut plantations in the future
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
Flight dynamics cherry fruit fly (Rhagoletis cerasi L.) and damage to the different cherry assortments
No full textTrešnjina muha (Rhagoletis cerasi L.) je najopasniji i najvažniji štetnik trešnje, a koji napada i višnje. Trešnjina muha proširena je na cijelom području uzgoja ovih vrsta u Republici Hrvatskoj.
S obzirom na činjenicu da je trešnjina muha isključivo tehnološki štetnik koji napada samo plodove uzrokujući njihovu „crvljivost“, posljedica pojave muhe odnosno napad rezultira lošom kakvoćom plodova, podložnosti truljenju, manjom količinom soka kod višanja.
Na fakultetskom pokušalištu Jazbina provedeno je praćenje dinamike leta trešnjine muhe pomoću vizualnih mamaca odnosno žutih ljepljivih ploča. Uz praćenje broja ulovljenih muha na pločama, korišteni su i podaci Državnog hidrometeorološkog zavoda za postaju Maksimir u zbrajanju efektivnih temperatura tla potrebnih za razvoj štetnika.
Na temelju dobivenih rezultata praćenja dinamike leta trešnjine muhe u 2017. godini pomoću žutih ljepljivih ploča, nije utvrđena prisutnost trešnjine muhe (Rhagoletis cerasi L.) na fakultetskom pokušalištu Jazbina, te na svim ostalim istraživanim područjima (vrt Zavoda za Voćarstvo, Lašćina). Razlog odsutnosti odnosno nepojavljivanja trešnjine muhe mogu biti uzrokovani različitim čimbenicima, od kojih su svakako najvažniji klimatski uvjeti o kojima ovisi razvoj kukuljica u tlu do odraslog oblika.
S obzirom da nije zabilježen let trešnjine muhe na lokalitetu Jazbina, kao niti u Maksimiru i na Lašćini, pokušalo se tražiti ličinke trešnjine muhe u plodovima trešnje s drugih lokaliteta; prilikom očitavanja pokusa 12. lipnja 2017. utvrđene su četiri ličinke u plodovima trešnje sakupljanih sa područja grada Čazme, u Bjelovarsko-bilogorskoj županiji.Cherry fruit fly (Rhagoletis cerasi L.) is the most important and most dangerous pests treasure. Attack and cherry and marasch. Rhagoletis cerasi L. has been expanded throughout the area of breeding of these species in the Republic of Croatia.
Due to the fact that cherry fruit fly is only a technological pest attacking only the fruits by causing their "crunchiness", the result of fever or attack results in poor fruit quality, susceptibility to rotting, lower amount of cherry juice.
The Jazbina faculty's experiment was conducted to monitor the dynamics of flywheel flight by visual bait or yellow sticky boards. In addition to tracking the number of catches flies on the boards, the data of the Meteorological and Hydrological Service for Maksimir station were used in the collection of the effective soil temperatures required for the development of pests.
Based on the results of monitoring flight dynamics cherry fruit flies in 2017 using yellow sticky boards, did not contain cherry fruit fly (Rhagoletis cerasi L.) on experimental college Jazbina, and to all other investigated areas (Garden of the Institute of Pomology, Lašćina). The reason for the absence or failure of the cherry fruit fly can be caused by various factors, of which the most important climatic conditions depend on the development of pupae in the soil to the adult form.
Since there was no registered cherry fruit fly on the locality Jazbina, as in Maksimir and Lašćina, attempts were made to look for larvae cherry fruit fly in the fruits of cherries from other localities; during the experiments on June 12, 2017, four larvae were harvested in cherry fruits collected from the area of Čazma, in Bjelovar-Bilogora County
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