1,214 research outputs found
Pro Memoria of Wilhelm Wortmann
No full textThe author of this report, Wilhelm Wortmann (born November 20, 1797 in Elberfeld, died August 6, 1882 in Dusseldorf) had been one of the deputy mayors in Dusseldorf since 1848 and was a member of the administrative council of the Allgemeine Musikverein, founded in 1845, where he functioned as recording secretrary. In addition, he was second oboist of the society's orchestra. This circumstance could have a personal note, since Wortmann was not a professional musician but one of the "dilletantes" whom Schumann disliked having in the orchestra.Robert Schumann was the director of the Allgemeine Musiverein [General Music Society] at Dusseldorf from 1850 until the end of 1853 (de jure until the end of 1854), conducting the orchestra and the chorus. He was also the municipal music director. Nearly from the beginning there were conflicts between the Society and Schumann. In his second year, he had a stormy confrontation with the deputy mayor Wilhelm Wortmann who was also a leading member of the council of the Allgemeine Musikverein. Schumann's health deteriorated during 1852 and especially the fall of 1853. Things got worse when members of the chorus and orchestra were dissatisfied with Schumann's style of conducting and refused to perform under his direction. Schumann was for his part dissatisfied with the skills of some instrumentalists and singers. In addition, Schumann failed (or refused) to appear at a concert on November 10, 1853. In a letter to the administrative council of the Society dated November 1853, Schumann accuses the council of breach of contract. Mayor Ludwig Hammers tries to mediate between the two parties with a letter dated December 5, 1853. In the end, Schumann terminated his contract in Dusseldorf in October 1854.The paper Pro memoria must have been written between November 19 and Debember 5, 1853. It was written to clarify the situation between the Society and its director and then delievered to the members of the town council of Dusseldorf. At the end of the report, Wormann mentions the letter from Schumann dated November 19 (page 43 of the Pro memoria, line 13-16). A copy of the Pro memoria was most probably sent to Schumann on Debember 5, 1853 from Mayor Hammers, along with a letter in which he asks for Schumann's comment on the reported events.There is another copy of this report held by the Stadtarchiv Dusseldorf (Town Archive Dusseldorf). There are two possibilities for the relationship the two documents. First, the Rice University copy could be a copy of the one held by the Town Archive Dusseldorf. Second, both could be a copy of another exemplar. The later seems likely. Both copies have mistakes in writing that are held in common. There are marks in the Rice copy made in pencil. It is unclear who made them. However, all of the are at parts of the text that report negatively on Robert Schumann. They stem from a member of the town council, from a member of the music society, or from later owners
Thermal analysis and synergistic tools for the development of a semi-permanent hair straightening technology
No full textThis research was carried out with the objective to develop a thermal analysis protocol into a method of damage assessment and claims support for a new semi-permanent hair straightening technology. The investigation determined the effects of the treatment on hair fibre composition and properties using Modulated Differential Scanning Calorimetry (MDSC) [1], Fourier Transform Infrared Spectroscopy (FTIR) [2], Gel Electrophoresis (SDS-PAGE) [3] and curl retention tests [4]. The effects of the new cysteamine treatment are compared with effects of a standard thioglycolate treatment and the daily use of straightening irons. Virgin, Caucasian hair was treated once with each chemical treatment and washed every day for 84 days. In a parallel study, hair was washed and straightened repeatedly using a standardised protocol at 190oC for 84 days. Samples were taken after 2, 28, 56 and 84 days for analysis by MDSC in water, ATR- and Trans-FTIR. Separate samples were treated once and subjected to curl retention tests and protein analysis. DSC measurements in water yield the keratin denaturation enthalpy (ΔHD), which relates to the thermal stability of the keratin intermediate filaments (KIFs), and the denaturation temperature (TD), which relates to the properties of the keratin associated-proteins (KAPs). The results show that chemical and thermal straightening cause a reduction in α-helix content and matrix viscosity. FTIR measurements give information on the formation of cysteic acid in the cuticle cells and the cortex. ATR-FTIR showed that the cysteamine–based treatment produces less cysteic acid in the cuticle layers than the standard treatment. Curl retention and SDS-PAGE were used to show the variability in the efficacy of the cysteamine treatment related to the heterogeneity of human hair. The results from both tests show that an individual’s hair will react with the product to a different extent, depending on the extractability of the keratin protein groups.In conclusion, we deduce that all straightening techniques, chemical and thermal, have a pronounced effect on the structural and chemical properties of hair fibres. These effects can be used to further develop and optimize this and related products. DSC has been shown to be an integral synergistic technique for the investigation of changes to hair morphology.This research was supported by the UK Technology Strategy Board under the Knowledge Transfer Partnership scheme.Cyril Keattch Award, Thermal Methods Group, Royal Society of Chemistry, 2014.[1] F.J. Wortmann, G. Wortmann, J. Marsh, K. Meinert. J. Struct. Biol., 177 (2012) 553. [2] V. Signori, D. Lewis. Int. J. Cosmet. Sci., 19 (1997) 1-13.[3] A.M. Zalfen, G. Wortmann, F.J. Wortmann. SOEFW Journal, 131 (2005) 40.[4] F.J. Wortmann, M. Stapels, L. Chandra. J Appl.Polym.Sci., 113 (2009) 3336
Thermal analysis and synergistic tools for the development of a semi-permanent hair straightening technology
No full textThis research was carried out with the objective to develop a thermal analysis protocol into a method of damage assessment and claims support for a new semi-permanent hair straightening technology. The investigation determined the effects of the treatment on hair fibre composition and properties using Modulated Differential Scanning Calorimetry (MDSC) [1], Fourier Transform Infrared Spectroscopy (FTIR) [2], Gel Electrophoresis (SDS-PAGE) [3] and curl retention tests [4]. The effects of the new cysteamine treatment are compared with effects of a standard thioglycolate treatment and the daily use of straightening irons. Virgin, Caucasian hair was treated once with each chemical treatment and washed every day for 84 days. In a parallel study, hair was washed and straightened repeatedly using a standardised protocol at 190oC for 84 days. Samples were taken after 2, 28, 56 and 84 days for analysis by MDSC in water, ATR- and Trans-FTIR. Separate samples were treated once and subjected to curl retention tests and protein analysis. DSC measurements in water yield the keratin denaturation enthalpy (ΔHD), which relates to the thermal stability of the keratin intermediate filaments (KIFs), and the denaturation temperature (TD), which relates to the properties of the keratin associated-proteins (KAPs). The results show that chemical and thermal straightening cause a reduction in α-helix content and matrix viscosity. FTIR measurements give information on the formation of cysteic acid in the cuticle cells and the cortex. ATR-FTIR showed that the cysteamine–based treatment produces less cysteic acid in the cuticle layers than the standard treatment. Curl retention and SDS-PAGE were used to show the variability in the efficacy of the cysteamine treatment related to the heterogeneity of human hair. The results from both tests show that an individual’s hair will react with the product to a different extent, depending on the extractability of the keratin protein groups.In conclusion, we deduce that all straightening techniques, chemical and thermal, have a pronounced effect on the structural and chemical properties of hair fibres. These effects can be used to further develop and optimize this and related products. DSC has been shown to be an integral synergistic technique for the investigation of changes to hair morphology.This research was supported by the UK Technology Strategy Board under the Knowledge Transfer Partnership scheme.Cyril Keattch Award, Thermal Methods Group, Royal Society of Chemistry, 2014.[1] F.J. Wortmann, G. Wortmann, J. Marsh, K. Meinert. J. Struct. Biol., 177 (2012) 553. [2] V. Signori, D. Lewis. Int. J. Cosmet. Sci., 19 (1997) 1-13.[3] A.M. Zalfen, G. Wortmann, F.J. Wortmann. SOEFW Journal, 131 (2005) 40.[4] F.J. Wortmann, M. Stapels, L. Chandra. J Appl.Polym.Sci., 113 (2009) 3336
Investigation of structural changes of ortho- and para-cortical cells in bleached human hair by Differential Scanning Calorimetry
No full textInvestigation of structural changes of Ortho- and Para- Cortical cells in bleached human hair by Differential Scanning CalorimetryD. Zhang 1, F. J. Wortmann 1, G. Wortmann 1, E. Schulze zur Wiesche 2 1 School of Materials, University of Manchester, Manchester, UK1 TRI Princeton, NJ, USA2 Henkel AG &Co KGaA, Hamburg, GERAbstract: Using three Gaussian distributions, the deconvoluted DSC results for two bleached hair samples confirm that a stronger bleach causes a homogenous structural damage on both para- and ortho-cortex with prolonged bleaching time. The predominant structural damage for various heating rates is verified to only occur in the IF. α-helices in three cortical components are homogenously damaged on chemically damaged fibres. However, heating rates yield a homogenous effect on disulfide linkages of para- and ortho- cortex, regardless of any previous oxidation treatment. Key Words: Deconvolution, para-cortex, ortho-cortex, heating rates, bleachin
Investigation of structural changes of ortho- and para-cortical cells in bleached human hair by Differential Scanning Calorimetry
No full textInvestigation of structural changes of Ortho- and Para- Cortical cells in bleached human hair by Differential Scanning CalorimetryD. Zhang 1, F. J. Wortmann 1, G. Wortmann 1, E. Schulze zur Wiesche 2 1 School of Materials, University of Manchester, Manchester, UK1 TRI Princeton, NJ, USA2 Henkel AG &Co KGaA, Hamburg, GERAbstract: Using three Gaussian distributions, the deconvoluted DSC results for two bleached hair samples confirm that a stronger bleach causes a homogenous structural damage on both para- and ortho-cortex with prolonged bleaching time. The predominant structural damage for various heating rates is verified to only occur in the IF. α-helices in three cortical components are homogenously damaged on chemically damaged fibres. However, heating rates yield a homogenous effect on disulfide linkages of para- and ortho- cortex, regardless of any previous oxidation treatment. Key Words: Deconvolution, para-cortex, ortho-cortex, heating rates, bleachin
Table to accompany Religion and Spirituality in Adjustment Following Bereavement: An Integrative Review
No full textThis table accompanies the article entitled Religion and Spirituality in Adjustment Following Bereavement: An Integrative Review, (Wortmann & Park, 2008). The table summarizes the results of published studies that contain a quantitative assessment of religion and an adjustment outcome in bereaved participants. Fields include author(s)\u27s last name, publication year, sample characteristics, independent religious/spiritual variable, adjustment variable, results, and study design
CFD ANALYSIS OF AIR FLOW AROUND THE ROTOR OF A 1 kW WORTMANN WINDTURBINE
No full textU diplomskom radu je provedena CFD analiza strujanja zraka oko rotora vjetroturbine snage 1 kW koja je oblikovana Wortmannovim aeroprofilima. Nakon analize strujanja zraka oko rotora, napravljena je usporedba s vjetroturbinom koja je izrađena od Althausovih aeroprofila čija je autorica kolegica Mihaela Erceg.
Ograničenja koja su postavljena autoru su snaga rotora vjetroturbine koja mora biti 1 kW i aeroprofili koji moraju biti oznake Wortmann.
Uzimajući u obzir ograničenja, kreće se u prelimirarnu fazu osnivanja i razvoja vjetroturbine iz koje se oblikuje geometrija konačnog seta aeroprofila. Sljedeća faza je oblikovanje geometrije u odgovarajućem softveru platforme Ansys. Zatim slijedi generiranje mreže vodeći računa o graničnom sloju. Nakon svega slijedi CFD simulacija u rješavaču Fluent na temelju čijih rezultata se vrši usporedba polja fizikalnih veličina kod dvije različite vjetroturbine i donosi se konačan zaključak po pitanju efikasnosti.
Na kraju su navedeni prijedlozi za poboljšanje procesa osnivanja i razvitka vjetroturbine.In this master’s thesis, a CFD analysis of wind flow around 1 kW wind turbine rotor defined by Wortmann airofils was conducted. After wind flow analysis around wind turbine rotor, a comparison was made with the windturbine that was made of Althaus airfoils whose author is a colleague Mihaela Erceg.
Limits set up upon author were the power of a windturbine rotor which is 1 kW and airfoils which must be a Wortmann brand.
Regarding the limits, the development starts with the preliminary phase of establishing and developing windturbine which is a start point for modelling the final set of airfoils. Next step is modelling geometry in a certain software of the platform Ansys. Next comes mesh generation taking into account boundary layer. After all, next comes CFD simulation in solver Fluent whose results are used to compare field of physical quantities for two different windturbines and a final conclusion is made regarding wind turbine efficiency.
Lastly, suggestions for improvement have been made for the process of founding and developing windturbine
Table to accompany Religion/Spirituality and Change in Meaning after Bereavement: Qualitative Evidence for the Meaning Making Model
No full textThis table accompanies the manuscript entitled Religion/Spirituality and Change in Meaning after Bereavement: Qualitative Evidence for the Meaning Making Model by Wortmann & Park (2009). The table summarizes the sample characteristics for published, qualitative studies that describe the involvement of religion/spirituality in adjustment after bereavement. Fields include author(s)\u27s last name, publication year, population characteristics and sample size, study design, age of the bereaved, type or cause of death, and time post-loss
Schuld und Erlösung in Traugott Teutschs Erzählung "Der Wortmann"
No full textIn his tale „Der Wortmann“, the Transylvanian-German author Traugott Teutsch tells the story of Peter Emerich, an influent man in his community, who is keen on getting rich and climbing up the social ladder, while preserving the image of an honest person. The article follows through different stages the evolution of his mindset up to the point where he repents of his past actions, tries to make amends for some of his mistakes and decides to lead an unselfish life of faithful service to the community. Guilt, repentance and redemption are some of the main topics followed in this article, which constituted also some of the founding stones of the Transylvanian-German collective mentality
[CODE] Ryan-Riggs/RivRetrieve: v0.1.3
No full textNo description provided.Riggs, R., Moulds, S., Wortmann, M., Slater, L., & Allen, G. (2023). Ryan-Riggs/RivRetrieve: v0.1.3 (v0.1.3). Zenodo. https://doi.org/10.5281/zenodo.1012551
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