1,355,479 research outputs found
Feldman, Harry A. -- 1950 -- Correspondence, Toxoplasmosis -- letter, 1950-07-29
No full textLetter from Neidhardt, H. W. to Sabin, Albert B. dated 1950-07-29.Sabin Collection Fair Use Policy</a
An extension of the Koplienko–Neidhardt trace formulae
No full textAbstractKoplienko (Sibirsk. Mat. Zh. 25(5) (1984) 62) found a trace formula for perturbations of self-adjoint operators by operators of Hilbert Schmidt class S2. A similar formula in the case of unitary operators was obtained by Neidhardt (Math. Nachr. 138 (1988) 7). In this paper we improve their results and obtain sharp conditions under which the Koplienko–Neidhardt trace formulae hold
CiRi-Engine: POI Recommender System for Diverse and Balanced Walking Tours
No full textWe present CiRi-Engine (CityRiddler Recommendation Engine), an interactive city walking-tour recommender system. This demonstration paper showcases a novel approach to generating personalized and balanced itineraries for urban exploration. By combining user-specified constraints, such as start and end locations, tour duration, interest categories, and challenge preferences, with an efficient dual-stage routing algorithm, CiRi-Engine dynamically constructs diverse routes featuring curated Points of Interest (POIs). The engine leverages a novel hybrid of A* and Beam Search for path planning, and incorporates preference-aware POI selection to ensure both relevance and diversity. We demonstrate firsthand how the system balances route diversity, thematic coherence, and user-specified constraints, demonstrating its effectiveness for handling multiple objectives and generating engaging walking tours
First proof of concept of remote attendance for future observation strategies between Wettzell (Germany) and Concepción (Chile)
No full textCurrent VLBI observations are controlled and attended locally at the radio telescopes on the basis of pre-scheduled session files. Operations have to deal with system specific station commands and individual setup procedures. Neither the scheduler nor the correlator nor the data-analyst gets real-time feedback about system parameters during a session. Changes in schedules after the start of a session by remote are impossible or at least quite difficult. For future scientific approaches, a more flexible mechanism would optimize the usage of resources at the sites. Therefore shared-observation control between world-wide telescope s, remote attendance/control as well as completely unattended-observations could be useful, in addition to the classic way to run VLBI observations. To reach these goals, the Geodetic Observatory Wettzell in cooperation with the Max-Planck-Institute for Radio Astronomy (Bonn) have developed a software extension to the existing NASA Field System for remote control. It uses the principle of a remotely accessible, autonomous process cell as server extension to the Field System on the basis of Remote Procedure Calls (RPC). Based on this technology the first completely remote attended and controlled geodetic VLBI session between Wettzell, Germany and Concepción, Chile was successfully performed over 24 hours. This first test was extremely valuable for gathering information about the differences between VLBI systems and measuring the performance of internet connections and automatic connection re-establishments. During the 24h-session, the network load, the number of sent/received packages and the transfer speed were monitor ed and captured. It was a first reliable test for the future wishes to control several telescopes with one graphical user interface on different data transfer rates over large distances in an efficient way. In addition, future developments for an authentication and user role management will be realized within the upcoming NEXPReS project
Ethical Cataloging Workshop
No full textVideo of a virtual presentation by Violet Fox, World Intellectual Property Organization, and Gretchen Neidhardt, Chicago History Museum, on ethical cataloging. This session discussed better and more inclusive subject headings, shared a variety of local solutions through case studies, and discussed barriers to ethical cataloging
Thinking Theory in the Architecture of Velimir Neidhardt; Alen Žunić
No full textThe book presents a collection of theoretical texts written and published by academician Velimir Neidhardt in the last 50 years (starting in 1968). The editor of the book dr.sc. Alen Žunić selected 120 seminal texts written by V. Neidhardt including some that have never been published before. The texts belong to diverse genres: from short notes, essays, interviews, project presentations to serious research studies. They are grouped into nine thematic sections: topics about Zagreb, urban planning, theoretical and historical reflections on architecture, architects, methodological aspects of architectural design, problems of professional activity, books and exhibitions, and the author’s own works. Besides, the book comprises a selection of Neidhardt’s interviews about various professional topics, the culture of space use and construction. The book also contains a selection of texts written by relevant architecture critics who offered an objective discourse in judging Neidhardt’s work
Perceived quality and spatial impression of room reverberation in VR reproduction from measured images and acoustics
No full textSpatiotemporal simulation of nickel oxide and carbon phases formation in solid oxide fuel cells (SOFC)
No full textThe formation of secondary phases in the porous electrodes is a severe mechanism affecting the
lifetime of solid oxide fuel cells (SOFC). It can occur via various chemical mechanisms and it has a
significant influence on cell performance due to pore clogging and deactivation of active surfaces and
triple-phase boundary (TPB). We present a modeling and simulation study of nickel oxide formation
(reoxidation) and carbon formation (coking) within the SOFC anode.
We use a 2D continuum model based on a multi-phase framework [Neidhardt et al., J. Electrochem.
Soc., 159, 9 (2012)] that allows the introduction of arbitrary solid phases (here: Ni, YSZ, NiO,
Carbon) plus gas phase. Reactions between the bulk phases are modeled via interface-adsorbed species
and are described by an elementary kinetic approach. Published experimental data are used for
parameterization and validation. Simulations allow the prediction of cell performance under critical
operation conditions, like (i) a non-fuel operation test, where NiO formation is taking place (Figure
1a), or (ii) an open circuit voltage (OCV) stability test under hydrocarbon atmosphere, where solid
carbon is formed (Figure 1b). Results are applied for enhanced interpretation of experimental data and
for prediction of safe operation conditions
Doing the right thing(s) when imagining and creating what is not yet : ethics in design research workshops
No full textFrom a feminist perspective, the chapter by Anja Neidhardt-Mokoena explores ethics in participatory design workshops. She articulates how ethical questions are generally approached in design research, and then looks at a concrete example to reflect on what doing the right thing(s) might entail.</p
Reversal of the glucose inhibition of histidase biosynthesis in Aerobacter aerogenes
No full textGlucose inhibits the biosynthesis of several inducible enzymes in Aerobacter aerogenes. Previ-ous studies (Neidhardt and MIagasanik, 1956a) have indicated that this inhibitory effect is not due to (a) failure of the inducing agents to pene-trate the cell, (b) the high growth rate of the cells in a glucose-containing medium, or (c) a deficit of the substances known to be essential for protein formation. Attempts to reverse this inhibition of enzyme biosynthesis by enrichment of the mini-mal medium with amino acid, purine-pyrimidine, or vitamin supplements have been unsuccessful (Neidhardt and M\Iagasanik, 1956a). The studies reported in this paper describe a different ap-proach to this problem: rather than enriching the glucose medium with organic supplements, the organism was placed in a situation in which the formation of an inducible enzyme in the presence of glucose was a prerequisite for growth. MATERIALS AND METHODS Organism and media. Two strains of A. aeroge-nes were employed in these experiments. One was strain XXXV, the wild type previous4y de-scribed (Neidhardt and M1agasanik, 1956a) and the other was strain A215B-19, an L-glutamic acid-requiring mutant kindly supplied by Dr
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