1,738,005 research outputs found
Joseph Dau
Full text linkabstract: Joseph Dau was eight years old when he left his home in Bor because of the war.
“Lost Boys Found” is an ongoing, interdisciplinary project that is collecting, recording and archiving the oral histories of the Lost Boys/Girls of Sudan. The collection is a work-in-progress, seeking to record the oral history of as many Lost Boys/Girls as are willing, and will be used in a future book.Age: 27Region: Upper NileThis picture and bio was donated to the "Lost Boys Found" oral history project from The Arizona Lost Boys Cente
Frank Dau Reminiscences, date unknown
No full textPhotcopy of a typed reminiscence concerning his parents, Detlef and Elsabe Dau, their life in Ellingstedt, Germany, emigrating to the United States, farming near Bancroft, Neb., and later near Thief River Falls, Minn., and some genealogical material
Liudas-Dau/hespdiv: Re-submission release
No full text<p>This release is associated with the paper and package version resubmitted to the "Palaeontology Journal".</p>
Stability of the Bet v 1 cross-reactive allergens Api g 1 and Dau c 1 : a biophysical approach
No full textThe allergen Bet v 1 is known as the primary sensitizer for birch pollen-related food allergy and is responsible for IgE cross-reactivity to pathogenesis-related 10 (PR-10) proteins from, in particular, fruits from the Rosaceae and vegetables from the Apiaceae families. The allergenic potential of PR-10 proteins is mainly characterized for specific recombinantly produced isoforms, which are used for research and diagnostic purposes. However, in natural food sources these allergens are often present as isoform mixtures. The first aim of this research was to purify and characterize PR-10 allergens as natural isoform mixtures to determine whether differences could be observed between natural and recombinant allergens and between plant families. The second aim was to find a relationship between the physico-chemical stability of PR-10 proteins and structural characteristics to explain differences in IgE binding potential and cross-reactivity. The PR-10 allergens Bet v 1 from birch, Api g 1 from celery, and Dau c 1 from carrot were purified under mild conditions following a standardized protocol. Different allergen isoforms were determined and circular dichorism (CD) analyses of the allergen mixtures showed a similar secondary structure composition as observed for other PR-10 proteins. The allergen mixtures and recombinant allergens were characterized by stability studies to pH, temperature and denaturant where CD was used to detect structural changes. Minor differences were observed in stability between natural isoform mixtures and between the recombinant isoforms, although recombinant Dau c 1 was likely destabilized by its attached His-tag. A general trend was observed for allergen stability, structural differences and their relationship to the IgE binding capacity in aqueous solutions. The allergenic potential decreases in the following order: Bet v 1, the primary allergen of birch pollen-related allergies, Mal d 1, Api g 1 and Dau c 1, in accordance with their amino acid sequence identity. Bet v 1 cross-reactive IgE antibodies preferably bind to the charged and polar residues of Mal d 1 for which the positive charge can be increased by the physiological pH of fruit. Api g 1 appears to be more stable than Dau c 1 as the result of a tighter hydrophobic packing. However, the thermodynamic stability of Api g 1 is similar to that of Bet v 1, but the higher proportion of hydrophobic residues and the reduced proportion of charged residues are responsible for the lower IgE binding capacity. Furthermore, the IgE binding capacity is not severely affected, as long as the protein is able to refold. The implications of these findings are discussed in the context of the development of allergic symptoms upon exposure to these PR-10 proteins. <br/
Liudas-Dau/hespdiv: Second Resubmission Release
No full text<p>-Removed dependency from deprecated sp package by recreating previously imported point.in.poly function within the package.
-Updated Description file so that package could be installed by using devtools or pak packages.</p>
Water levels at Hon Dau (Vietnam)
No full textHandwritten tables with observed hourly waterlevels at the tidal station of Hon Dau (near Hai Phong in Vietnam) covering the period 1975-1995
Predicting speech intelligibility in adverse conditions: evaluation of the speech-based envelope power spectrum model
Full text linkThe speech-based envelope power spectrum model (sEPSM) [Jørgensen and Dau (2011). J. Acoust. Soc. Am., 130 (3),1475–1487] estimates the envelope signal-to-noise ratio (SNRenv) of distorted speech and accuratelydescribes the speech recognition thresholds (SRT) for normal-hearing listeners in conditions with additive noise, reverberation, and nonlinearprocessing by spectral subtraction. The latter represents a condition where the standardized speech intelligibility index and speech transmission indexfail. However, the sEPSM is limited to stationary interferers due to the fact that predictions are based on the long-term SNRenv. As an attempt to extentthe model to deal with fluctuating interferers, a short-time version of the sEPSM is presented. The SNRenv of a speech sample is estimated from acombination of SNRenv-values calculated in short time frames. The model is evaluated in adverse conditions by comparing predictions to measured datafrom [Kjems et al. (2009). J. Acoust. Soc. Am. 126 (3), 1415-1426] where speech is mixed with four different interferers, including speech-shapednoise, bottle noise, car noise, and cafe noise. The model accounts well for the differences in intelligibility observed for the different interferers. Noneof the standardized models successfully describe these data
Pseudoconvex domains: Diederich - Fornaess index and the invariant metrics near the boundary points
Full text linkThis Thesis deals with some problems related to the pseudoconvex domain.
The first chapter presents some results on the theory on plurisubharmonic defining function. From the relation of the Diederich - Fornaess index with the estimate for \bar\partial - Neumann operator on the pseudoconvex domain, the author generalize the results by finding the index and its applications on general q-pseudoconvex domains.
The second part of the thesis is studying the invariant metrics, more precise, the Kobayashi metric, near infinite boundary points. Diederich and Fornaess on showed us how fast the Kobayashi metric of a point go to infinity when it comes near the boundary of a pseudoconvex domain that has real analytic boundary. Remove that cruel assumption, the author prove the result in more general class domains. From the estimate for the Kobayashi metric, there is a proper holomorphic mapping theorem and have a Holder estimate for it
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