6,303 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
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
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Functional heterointerfaces via electromodulation spectroscopy
No full textFunctional heterojunctions in organic electronic devices are interfaces formed either between a conducting electrode and an organic semiconductor or between two different organic semiconductors in blended and multilayered structures. This thesis is primarily concerned with the energy level alignment and the interfacial electronic structures at functional heterojunctions
encountered in electronic devices made with solution-processable semiconducting polymers. Investigations on the electronic structures across these heterointerfaces are performed with the combined use of electromodulation and photoemission spectroscopic techniques.
Electromodulation and ultraviolet photoemission spectroscopic techniques enable direct determination of the surface work functions of electrodes at the electrode/semiconducting polymer interfaces. We overcame the inherent problems faced by electromodulation
spectroscopy, which undermine accurate determination of interfacial electronic structures, by performing electroabsorption (EA) measurements at reduced temperatures. We showed in this thesis that low-temperature EA spectroscopy is a surface sensitive technique that can determine
the interface electronic structures in electrode/polymer semiconductor/electrode diodes. Using this technique, we demonstrated that the energy level alignments in these solution-processed
organic electronic devices are determined by the surface work functions of passivated metals rather than by those of clean metals encountered in ultrahigh vacuum.
This thesis also discloses our studies on the electronic structures in polymeric diodes with type II donor-acceptor heterojunctions using the EA spectroscopy. We showed that minimising meausurement temperature and attenuating EA illumination intensity enable accurate determinations of the electronic structures in these devices. We demonstrated that the electronic
structures and the performance characteristics of multilayered polymer light-emitting diodes are also determined by the surface work functions of passivated metals. Our investigations confirm that electronic doping of the organic active layers, rather than minimisation of the
Schottky barriers at electrode/polymer contacts, holds the key in realising high-performance organic light-emitting devices
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A handwritten letter from Richard Casillas to Dr. Hector P. Garcia.
No full textA handwritten letter from Richard Casillas to Dr. Hector P. Garcia, asking for his support for Casillos's friend, Preston H. Dial in his bid for the Texas Court of Criminal Appeals
Richard C. Donnelly
No full textWhen George Dession died in 1955, at the age of forty-nine, his friend and colleague Richard C. Donnelly wrote of him: The criminal law has lost one of its ablest scholars
A narrative approach in religious education. Inspirations from the theological legacy of H. Richard Niebuhr
No full textA narrative approach in religious education is presented here in the context of social polarization in the contemporary world. Its dialogical potential is derived by the author from the theological legacy of H. Richard Niebuhr
Ultrafast carrier thermalization in lead iodide perovskite probed with two-dimensional electronic spectroscopy
No full textIn band-like semiconductors, charge carriers form a thermal energy distribution rapidly after optical excitation. In hybrid perovskites, the cooling of such thermal carrier distributions occurs on timescales of about 300 fs via carrier-phonon scattering. However, the initial build-up of the thermal distribution proved difficult to resolve with pump–probe techniques due to the requirement of high resolution, both in time and pump energy. Here, we use two-dimensional electronic spectroscopy with sub-10 fs resolution to directly observe the carrier interactions that lead to a thermal carrier distribution. We find that thermalization occurs dominantly via carrier-carrier scattering under the investigated fluences and report the dependence of carrier scattering rates on excess energy and carrier density. We extract characteristic carrier thermalization times from below 10 to 85 fs. These values allow for mobilities of 500 cm Vs at carrier densities lower than 2 × 10 cm and limit the time for carrier extraction in hot carrier solar cells
Healing Richard Nixon: A Doctor\u27s Memoir
No full textRichard M. Nixon remains an enigma even thirty years after his resignation. Of the many portraits of this complex man, none have been more intimate or revealing than this memoir from his personal physician, friend, and confidante of more than forty years, John C. Lungren, M.D. Dr. Lungren, with his son and co-author John C. Lungren Jr., portrays Nixon as a paradoxical man—intense, compassionate, guarded, intelligent, resilient, deeply religious, enormously successful but ultimately tragic.
Lungren describes his battle to restore the president’s health after his resignation and reveals previously unknown details about Nixon’s two intensive hospitalizations, his near fatal vascular collapse, and his depression. Lungren experienced firsthand Nixon’s thoughts and feelings during the public scrutiny of federal prosecution for his role in the Watergate break-in. Accused of shielding his friend, Lungren himself came under fire; his private office was even burgled in an apparent attempt to copy Nixon’s private medical records.
Using previously unpublished sources, original correspondence, and private photographs, Healing Richard Nixon places Nixon in a new light. No future research or conclusions about Nixon—the man or the president—will be complete without consulting this fascinating memoir.
The late John C. Lungren M.D. became Richard Nixon\u27s personal physician in 1952.
John C Lungren Jr. is a former reporter for Knight-Ridder and author of Hesburgh of Notre Dame:Priest, Educator, Public Servant.
Lungren describes the real Nixon, as he struggled with and ultimately overcame near-fatal illness, depression, and political ridicule to become an ‘elder statesman’ constructively advancing international stability. —Choice
Rather than retelling the familiar facts, the authors provide a fresh perspective: that of Nixon’s personal physician, a post the senior Lungren held from 1952 until the early 1980s. —ForeWord
Out of all the books written about President Richard Nixon, the Lungrens have authored one of the few chronicles I find to be totally accurate. Brings the reader a personal view of Nixon which only would be available to a long-time personal friend and a doctor who stayed within his code of ethics even under the pressure of Watergate. —Herbert G. Klein, Former Nixon Administration White House Director of Communications
Essential reading for anyone wishing to understand all the dimensions of a great architect of peace. —John H. Taylor, Director, Richard Nixon Library & Birthplace
Valuable for its conversation about Nixon\u27s medical ordeals. Dr. Lungren admires Nixon but recognized some of his faults. —Library Journalhttps://uknowledge.uky.edu/upk_political_history/1023/thumbnail.jp
Computer education of chemists
No full textRichard H. Heist ( with H. Saltsburg and T. Olsen) is a contributing author, The Microcomputer in the Undergraduate Laboratory , Chapter 8.https://digitalcommons.fairfield.edu/engineering-books/1045/thumbnail.jp
Dark Subgap States in Metal-Halide Perovskites Revealed by Coherent Multidimensional Spectroscopy
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