121,839 research outputs found
Herr, Julius
No full textInterview with Julius E. Herr on June 25-29, 1979 in Wishek, North Dakota. Conducted by Dwight L. Herr.Interview with Julius E. Herr on June 25-29, 1979 in Wishek, North Dakota. Conducted by Dwight L. Herr
Letter From A. Miriam Herr to Alfred L. Shoemaker, November 20, 1948
No full textA handwritten letter from Mrs. Leslie H. Shannon (A. Miriam Herr) addressed to Alfred L. Shoemaker, dated November 20, 1948. Within, Herr writes to respond to Shoemaker\u27s question on a favorite all story. Herr details her encounter with an Amish man while buying blackberries at a market stall in Lancaster, Pennsylvania.https://digitalcommons.ursinus.edu/shoemaker_documents/1025/thumbnail.jp
A Model of Photon Cell Killing Based on the Spatio-Temporal Clustering of DNA Damage in Higher Order Chromatin Structures
No full textWe present a new approach to model dose rate effects on cell killing after photon radiation based on the spatio-temporal clustering of DNA double strand breaks (DSBs) within higher order chromatin structures of approximately 1-2 Mbp size, so called giant loops. The main concept of this approach consists of a distinction of two classes of lesions, isolated and clustered DSBs, characterized by the number of double strand breaks induced in a giant loop. We assume a low lethality and fast component of repair for isolated DSBs and a high lethality and slow component of repair for clustered DSBs. With appropriate rates, the temporal transition between the different lesion classes is expressed in terms of five differential equations. These allow formulating the dynamics involved in the competition of damage induction and repair for arbitrary dose rates and fractionation schemes. Final cell survival probabilities are computable with a cell line specific set of three parameters: The lethality for isolated DSBs, the lethality for clustered DSBs and the half-life time of isolated DSBs. By comparison with larger sets of published experimental data it is demonstrated that the model describes the cell line dependent response to treatments using either continuous irradiation at a constant dose rate or to split dose irradiation well. Furthermore, an analytic investigation of the formulation concerning single fraction treatments with constant dose rates in the limiting cases of extremely high or low dose rates is presented. The approach is consistent with the Linear-Quadratic model extended by the Lea-Catcheside factor up to the second moment in dose. Finally, it is shown that the model correctly predicts empirical findings about the dose rate dependence of incidence probabilities for deterministic radiation effects like pneumonitis and the bone marrow syndrome. These findings further support the general concepts on which the approach is based. Copyright: © 2014 Herr et al. Copyright: © 2014 Luksys et al
[archive] Kamagurka en Herr Seele /
No full textFotoarchief Michiel HendryckxCartoonisten en kunstenaarsVPRO, nr 46, 17 nov 1985 t/m 24 nov 1985De foto kan u fysiek raadplegen in de leeszaal. Een scan opvragen is op vraag van de fotograaf niet mogelijk.Hendryckx, MichielBijzondere collectiesKaft : portret van Herr Seele (l) en Kamagurka (r)P 3-5 : interview Kamagurka door Rudy Vandendaele
Schiller et Goethe. — Correspondance, Plop, trad. L. Herr, 1923
No full textSchiller et Goethe. — Correspondance, Plop, trad. L. Herr, 1923. In: La revue pédagogique, tome 85, Juillet-Décembre 1924. pp. 146-147
Strichartz estimates and global well-posedness of the cubic NLS on
No full textThe optimal -Strichartz estimate for the Schr{ö}dinger equation on the two-dimensional rational torus is proved, which improves an estimate of Bourgain. A new method based on incidence geometry is used. The approach yields a stronger bound on a logarithmic time scale, which implies global existence of solutions to the cubic (mass-critical) nonlinear Schrödinger equation in for any and data which is small in the critical norm.v2: 19 pages, 5 figures. An error (Lemma 3.1 of version 1) has been corrected. v3: minor corrections, additional remarks and references and improved exposition in Section
On the 2D Zakharov system with Schrödinger data
No full textBejenaru I, Herr S, Holmer J, Tataru D. On the 2D Zakharov system with Schrödinger data. Nonlinearity. 2009;22(5):1063-1089
Dracocephalum ruyschiana L. (Svētezers, Livlande)
No full textNordischer Drachenkopf. Karl Reinhold Kupffer Anmerkung: Von Herr Raudsep erhalten als bei Heiligensee in Livland gesamellt. Ende des 19., Anfang des 20. Jahrhunderts. ///
Ruiša pūķgalve. Uzraksts: no Raudsepa kunga saņemts kā pie Svētezera Livlandē ievākts. 19.gadsimta beigas, 20. gadsimta sākums. ///
Northern Dragon-head. Annotation: received from Mr. Raudsepp as collected at Svētezers in Livland.Late 19th century, early 20th century.
[Attēls no LU Muzeja kolekcijas Herbarium Balticum (RIG I); (BOT2791_5).
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
On the influence of temperature and enthalpy of mixing during the mechanical alloying of metals
No full textOn the influence of temperature and enthalpy of mixing during the mechanical alloying of metals / U. Herr ; K. Samwer. - In: International Conference on Solid-Solid Phase Transformations : Proceedings of an ... / ed. by W. L. Johnson ... - Warrendale, Pa. : The Minerals Metals and Materials Soc., 1994. - S. 1039-104
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