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Kirsch, Carl-Martin. "Leipzig 2009." Nuklearmedizin 48, no. 02 (2009): N5. http://dx.doi.org/10.1055/s-0037-1621100.
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Maul, Michael. ""welche ieder Zeit aus den 8 besten Subjectis bestehen muß"." Bach-Jahrbuch 99 (October 22, 2018): 11–77. http://dx.doi.org/10.13141/bjb.v20132978.
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Der Artikel schließt an die Debatte an, die sich seit den 80er Jahren um die Frage der Chorgröße bei Bach und daraus folgenden Konsequenzen für die heutige Aufführungspraxis dreht. Dabei ist das Anliegen weniger eine Parteinahme innerhalb der Diskussion als eine Erweiterung des zeitlichen Kontextes. So werden die Organisationsprinzipien der Thomaner-"Chöre" von der Frühzeit bis ins 19. Jahrhundert hinein ergründet. Dabei werden Kontinuitäten wie Brüche benannt und der Versuch unternommen, bisher unklare Begrifflichkeiten wie "Chorus", "Coetus" oder "Cantorey" schärfer voneinander abzugrenzen. Als Quellen werden das Album Alumnorum Thomanorum für die Zeit 1730-1800 sowie Rechnungshefte und -bücher vom 17. bis ins 19. Jahrhundert berücksichtigt. Aus diesen neu in die Diskussion eingebrachten sowie bereits bekannten Quellen werden Folgerungen zur Systematik, den Organisationsprinzipien und Einnahmequellen sowie personellen und strukturellen Zusammenhängen zwischen den einzelnen Ensembles der Thomasschule gezogen. Der Anhang liefert dazu unter anderem eine Umschrift und Übersetzung der Regeln für die "Concentores" der Thomas-"Cantoreyen" von 1634 und 1723.
Erwähnte Artikel: Bernhard Friedrich Richter: Stadtpfeifer und Alumnen der Thomasschule in Leipzig zu Bachs Zeit. BJ 1907, S. 32-78
Hans-Joachim Schulze: Studenten als Bachs Helfer bei der Leipziger Kirchenmusik. BJ 1984, S. 45-52
Hans-Joachim Schulze: Über den Endzweck der Kirchenmusik in Leipzig nach 1750. BJ 1995, S. 191-193
Michael Maul: Der 200. Jahrestag des Augsburger Religionsfriedens (1755) und die Leipziger Bach-Pflege in der zweiten Hälfte des 18. Jahrhunderts. BJ 2000, S. 101-118
Andreas Glöckner: "... daß ohne Hülffe derer Herren Studiosorum der Herr Cantor keine vollstimmende Music würde bestellen können ..." Bemerkungen zur Leipziger Kirchenmusik vor 1723 und nach 1750. BJ 2001, S. 131-140
Michael Maul, Peter Wollny: Quellenkundliches zu Bach-Aufführungen in Köthen, Ronneburg und Leipzig zwischen 1720 und 1760. BJ 2003, S. 97-141
Hans-Joachim Schulze: Parrott, Andrew: Bachs Chor [...] Stuttgart, Weimar, Kassel 2003. BJ 2003, S. 267-270
Andreas Glöckner: Alumnen und Externe in den Kantoreien der Thomasschule zur Zeit Bachs. BJ 2006, S. 9-36
Hans-Joachim Schulze: Neubacher, Jürgen: Georg Philipp Telemanns Hamburger Kirchenmusik [...] Hildesheim, Zürich, New York 2009. BJ 2009, S. 233-238
Joshua Rifkin: Chorliste und Chorgröße bei Johann Sebastian Bach. Neue Überlegungen zu einem alten Thema. BJ 2012, S. 121-143
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Wollny, Peter. "Beobachtungen am Autograph der h-Moll-Messe." Bach-Jahrbuch 95 (March 13, 2018): 135–51. http://dx.doi.org/10.13141/bjb.v20091863.
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Der Artikel stellt verschiedene Beobachtungen am Manuskript P 180 von BWV 232 zusammen. Dabei wird besonders eine Beteiligung Johann Christoph Friedrich Bachs an der Niederschrift erörtert und mittels verschiedener Ansätze zu belegen versucht. Abschließend werden an diese These anknüpfende Überlegungen vorgestellt, die den Entstehungszeitraum und die Frage einer konkreten Aufführungsabsicht und Auftraggeberschaft betreffen.
Erwähnte Artikel: Hans-Joachim Schulze: Frühe Schriftzeugnisse der beiden jüngsten Bach-Söhne. BJ 1963/64, S. 61-69
Peter Wollny: Neue Bach-Funde. BJ 1997, S. 7-50
Michael Maul, Peter Wollny: Quellenkundliches zu Bach-Aufführungen in Köthen, Ronneburg und Leipzig zwischen 1720 und 1760. BJ 2003, S. 97-142
Christoph Wolff: Johann Sebastian Bachs Regeln für den fünfstimmigen Satz. BJ 2004, S. 87-100
Andreas Glöckner: Johann Sebastian Bach und die Universität Leipzig - Neue Quellen (Teil I). BJ 2008, S. 159-202
Michael Maul: "Die große catholische Messe". Bach, Graf Questenberg und die "Musicalische Congregation" in Wien. BJ 2009, S. 153-176
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Böhme-Mehner, Tatjana. "Interview with Georg Katzer, 18th October, 2009, Leipzig." Contemporary Music Review 30, no. 1 (February 2011): 101–9. http://dx.doi.org/10.1080/07494467.2011.624316.
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Wolf, Uwe. "Zur Leipziger Aufführungstradition der Motetten Bachs im 18. Jahrhundert." Bach-Jahrbuch 91 (March 12, 2018): 301–10. http://dx.doi.org/10.13141/bjb.v20051776.
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Einleitend wird die Fragestellung umrissen, inwiefern die Aufführung Bachscher Motetten in der Leipziger Thomaskirche nach 1750 als gesichert gelten kann, seit wann diese stattfanden und welche Werke aus welchen Noten musiziert wurden. Daraufhin werden Quellen zu den ehemaligen Beständen der Thomasschule untersucht. Weiterhin dient die im Besitz Mozarts vorhandene Abschrift zweier Bachmotetten als Ausgangspunkt quellenkritischer Überlegungen zur Überlieferung der Werke in Leipzig. Auch autobiografische Zeugnisse Friedrich Rochlitz‘ und Friedrich Samuel Doerings werden herangezogen, eher der Autor zu dem Schluss kommt, dass von einer ungebrochenen Tradition des Singens von Bach-Motetten in der Leipziger Thomasschule nur sehr eingeschränkt gesprochen werden könne. Dafür werden mögliche Gründe aufgeführt und auch der schrittweise Wandel dieser Situation geschildert.
Erwähnte Artikel: Andreas Glöckner: Der 200. Jahrestag des Augsburger Religionsfriedens (1755) und die Leipziger Bach-Pflege in der zweiten Hälfte des 18. Jahrhunderts. BJ 2000, S. 101-118
Peter Wollny: Tennstedt, Leipzig, Naumburg, Halle - Neuerkenntnisse zur Bach-Überlieferung in Mitteldeutschland. BJ 2002, S. 29-47
Michael Maul, Peter Wollny: Quellenkundliches zu Bach-Aufführungen in Köthen, Ronneburg und Leipzig zwischen 1720 und 1760. BJ 2003, S. 97-141
Weiterführende Artikel: Andreas Glöckner: "... daß ohne Hülffe derer Herren Studiosorum der Herr Cantor keine vollstimmende Music würde bestellen können ...". Bemerkungen zur Leipziger Kirchenmusik vor 1723 und nach 1750. BJ 2001, S. 131-140
Frauke Heinze: Vier unbekannte Textdrucke zu Leipziger Ratswahlkantaten aus den Jahren 1751-1754. Überlegungen zum Repertoire der Amtszeit Gottlob Harrers. BJ 2008, S. 317-327
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Wollny, Peter. "Zwei Bach-Funde in Mügeln. C. P. E. Bach, Picander und die Leipziger Kirchenmusik in den 1730er Jahren." Bach-Jahrbuch 96 (January 1, 2010): 111–52. http://dx.doi.org/10.13141/bjb.v20101883.
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Der Artikel stellt zwei in den Musikalienbeständen der Stadtkirche St. Johannis aufgefundene Manuskripte vor. Zum einen handelt es sich um ein Kompositionsautograf C. P. E. Bachs (Ich bin vergnügt in meinem Stande, Kantate CPEBachWV F 30), zum anderen um eine Abschrift einer nicht genau identifizierbaren Missa (Kyrie und Gloria) in e-moll von der Hand J. S. Bachs. Neben der Beschreibung der Quellen widmet sich der Artikel ihrer Überlieferung bis zum Verbleib in Mügeln. Besondere Aufmerksamkeit widerfährt der Komposition C. P. E. Bachs, die als früheste Quelle zu dessen kompositorischen Schaffen (ca. 1732-34) eingehend gewürdigt wird.
Erwähnte Artikel: Bernhard Friedrich Richter: Stadtpfeifer und Alumnen der Thomasschule in Leipzig zu Bachs Zeit. BJ 1907, S. 32-78
Alfred Dürr: Zur Echtheit einiger Bach zugeschriebener Kantaten. BJ 1951/52, S. 30-46
Conrad Freyse: Die Schulhefte Wilhelm Friedemann Bachs. BJ 1951/52, S. 103-119
Hans-Joachim Schulze: Vier unbekannte Quittungen J. S. Bachs und ein Briefauszug Jacob von Stählins. BJ 1973, S. 88-90
Klaus Häfner: Der Picander-Jahrgang. BJ 1975, S. 70-113
William H. Scheide: Bach und der Picander-Jahrgang - Eine Erwiderung. BJ 1980, S. 47-51
Andreas Glöckner: Neuerkenntnisse zu Johann Sebastian Bachs Aufführungskalender zwischen 1729 und 1735. BJ 1981, S. 43-76
William H. Scheide: Eindeutigkeit und Mehrdeutigkeit in Picanders Kantatenjahrgangs-Vorbemerkung und im Werkverzeichnis des Nekrologs auf Johann Sebastian Bach. BJ 1983, S. 109-113
Hans-Joachim Schulze: Rezension zu: Ortrun Landmann: Die Telemann-Quellen der Sächsischen Landesbibliothek [...] Dresden 1983. BJ 1985, S. 185-187
Hans-Joachim Schulze: Rezension zu: Klaus Häfner: Aspekte des Parodieverfahrens bei Johann Sebastian Bach. Laaber 1987. BJ 1990, S. 92-94
Ulrich Leisinger, Peter Wollny: "Altes Zeug von mir". Carl Philipp Emanuel Bachs kompositorisches Schaffen vor 1740. BJ 1993, S. 127-204
Peter Wollny: Zur Überlieferung der Instrumentalwerke Johann Sebastian Bachs [...] BJ 1996, S. 7-22
Andreas Glöckner: Alumnen und Externe in den Kantoreien der Thomasschule zur Zeit Bachs. BJ 2006, S. 9-36
Daniel R. Melamed: Hat Johann Sebastian Bach die Lukas-Passion BWV 246 aufgeführt? BJ 2006, S. 161-170
Tatjana Schabalina: "Texte zur Music" in Sankt Petersburg. Neue Quellen zur Leipziger Musikgeschichte sowie zur Kompositions- und Aufführungstätigkeit Johann Sebastian Bachs. BJ 2008, S. 33-98
Marc-Roderich Pfau: Ein unbekanntes Leipziger Kantatentextheft aus dem Jahr 1735 - Neues zum Thema Bach und Stölzel. BJ 2008, S. 99-122
Andreas Glöckner: Johann Sebastian Bach und die Universität Leipzig - Neue Quellen (Teil I). BJ 2008, S. 159-202
Rashid-S. Pegah: Carl Philipp Emanuel Bach und Kronprinz Friedrich in Preußen: Dier erste Begegnung? BJ 2008, S. 328-332
Tatjana Schabalina: "Texte zur Music" in Sankt Petersburg. BJ 2009, S. 11-48
Andreas Glöckner: Ein weiterer Kantatenjahrgang Gottfried Heinrich Stölzels in Bachs Aufführungsrepertoire? BJ 2009, S. 95-116
Hans-Joachim Schulze: Johann Sebastian Bachs Himmelfahrts-Oratorium und Picanders Geburtstagskantate für "Herrn J. W. C. D.". BJ 2009, S. 191-199
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Port, Andrew. "Befreiung? Die Ostdeutschen und 1945. By Silke Satjukow. Leipzig: Leipziger Universitätsverlag, 2009. Pp. 288. €29.00." Journal of Modern History 83, no. 2 (June 2011): 472–74. http://dx.doi.org/10.1086/659202.
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Harris, Victoria. "Werner Bramke and Silvio Reisinger, Leipzig in der Revolution von 1918/1919. Leipzig: Leipzig Universitätsverlag, 2009. 152pp. 11 illustrations. 3 tables. £20.00/ €24.00." Urban History 38, no. 1 (April 5, 2011): 198–99. http://dx.doi.org/10.1017/s0963926811000290.
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Aust, Robert. "Disability in Higher Education: Explanations and Legitimisation from Teachers at Leipzig University." Social Inclusion 6, no. 4 (December 6, 2018): 125–36. http://dx.doi.org/10.17645/si.v6i4.1641.
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In 2009, Germany ratified the UN Convention on the Rights of Persons with Disabilities (UN-CRPD) and committed itself to allow for “the full and effective participation [of people with disabilities] in society” (United Nations, 2006, §3), especially in education (United Nations, 2016, §24). The present article addresses the necessary follow-up question: which patterns of perception university teachers have of students with disabilities? A first project-based qualitative analysis of data from the EU-project “European Action on Disability within Higher Education” has been conducted on the grounds that disability can be described as a constructed sociocultural phenomenon (Tremain, 2005), showing that heterogenous concepts of disability can be reconstructed from the interviews (Aust, Trommler, & Drinck, 2015). In an adaptation of theoretical sampling according to Grounded Theory (Glaser & Strauss, 2010), interviews with teachers were selected for this article. The Explanatory Legitimacy Theory Model by DePoy and Gilson (2004, 2010) served as a pool of ideas for analysis. The four main areas of, 1) effective power of symbols or iconic figures, 2) performativity of attributions of disability, 3) dimension of time for concepts addressed, and 4) perpetuation of the medicine model can be reconstructed. The analysis indicates that the medicine model remains the dominant reference when teachers in higher education speak about disability. In conclusion, conditions that impede the proper implementation of the UN-CRPD in higher education must be identified so that higher education institutions can be further developed as multicultural organisations (Schein, 1984).
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Pyschny, Andreas, Erik Wilde, and Robert Knippschild. "Auf dem Weg zur Stadtregion?" Raumforschung und Raumordnung 70, no. 6 (December 31, 2012): 531–44. http://dx.doi.org/10.1007/s13147-012-0198-3.
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Zusammenfassung Seit dem Jahr 2009 existiert in der Region Halle/Leipzig eine über die Landesgrenze zwischen Sachsen und Sachsen-Anhalt reichende, freiwillige Kooperation der Städte und Gemeinden bei der Gewerbeflächenentwicklung. Der Beitrag beleuchtet den bisherigen Kooperationsprozess, benennt wichtige Meilensteine der Zusammenarbeit, wie etwa die Bewertung des regionalen Flächenpotenzials, und stellt die derzeit existierenden Arbeits- und Kommunikationsstrukturen dar. Kernstück des Artikels bildet die Einordnung des Fallbeispiels in die Debatte um „Regional Governance“, bei der konzeptionelle Merkmale und tatsächliche Ausprägungen gegenübergestellt werden. Aus der Analyse werden allgemeine Erkenntnisse gezogen sowie Schlussfolgerungen für den künftigen Kooperationsprozess in der Region Halle/Leipzig abgeleitet.
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Groß, Matthias. "Reshaping Nature: Old Limits and New Possibilities Leipzig. November 5-7, 2009." TATuP - Zeitschrift für Technikfolgenabschätzung in Theorie und Praxis 19, no. 1 (April 1, 2010): 109–10. http://dx.doi.org/10.14512/tatup.19.1.109.
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Grüneberg, Tillmann. "Der Abbruch des Lehramtsstudiums an der Universität Leipzig." arbeitstitel | Forum für Leipziger Promovierende 6, no. 2 (February 24, 2015): 66–68. http://dx.doi.org/10.36258/aflp.v6i2.3300.
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Obgleich nur relativ wenige Studierende das Lehramtsstudium verlassen und von jenen wiederum nur ein Teil bereit ist Auskunft über die Gründe des Studienabbruchs oder -wechsels zu geben, ist die Perspektive dieses Personenkreises von großem Interesse. Nicht zuletzt aufgrund des Lehrermangels und der öffentlichen Diskussion um Studienabbruch. In diesem Sinne kann die Reduktion des Studienabbruchs im Zuge des verstärkten Qualitätsmanagements von Hochschulen als wichtiges Ziel der Effizienzsteigerung verstanden werden. Daher wurde die im WS 2009/10 begonnene Befragung der Studienabbrecher und Fachwechsler seither kontinuierlich fortgeführt. Zwischen 2009 und 2012 brachen 454 Studierende ihr Lehramtsstudium an der Universität Leipzig ab (14,3%). Diese Abbrecher befragten wir in einer Online-Erhebung (Rücklaufquote 20,3%). Die Antworten auf die offenen Fragen wurden mithilfe von Verfahren der qualitativen Inhaltsanalyse ausgewertet (Intercoder-Übereinstimmung: .891-.985 κ). Die Besonderheit unseres Ansatzes ist es, neben der Beschreibung des Studienabbruchs (1), die subjektiv empfundenen (Hinter-)Gründe zu rekonstruieren (2), deren Bedeutsamkeit hinsichtlich des Entscheidungsvollzugs gewichten zu können (3) und neben den rationalen Begründungen auch das emotionale Erleben zu berücksichtigen (4). So lassen sich nicht nur ausschlaggebende Abbruchgründe wie Unzufriedenheit mit den Studienbedingungen, familiäre Verpflichtungen, Entfremdung vom Berufswunsch sowie Überforderung durch die Anforderungen des Studiums herausstellen, sondern auch darüber hinaus internal und external lokalisierte positive wie negative Gefühle bezüglich des Studienabbruchs einordnen. Aufbauend auf diesen ersten Ergebnissen wird die Evaluation der lehrerbildenden Studiengänge fortgesetzt. Ein nächster Schritt im Projekt wird der Vergleich der Studienmotivation der Erstsemester (Gründe ebenso wie Emotionen) mit den Studienabbrechern sein.
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Wille, Matthias. "Lothar Kreiser. Logik und Logiker in der DDR. Eine Wissenschaft im Aufbruch. Leipziger Universitaetsverlag, Leipzig, 2009, 479 pp." Bulletin of Symbolic Logic 16, no. 1 (March 2010): 87–89. http://dx.doi.org/10.1017/s1079898600001165.
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Wollny, Peter. "Eine unbekannte Bach-Handschrift und andere Quellen zur Leipziger Musikgeschichte in Weißenfels." Bach-Jahrbuch 99 (October 22, 2018): 129–70. http://dx.doi.org/10.13141/bjb.v20132980.
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Der Artikel stellt die Ergebnisse einer systematischen Untersuchung der im Weißenfelser Heinrich-Schütz-Haus verwahrten Musiksammlung der ehemaligen Ephorialbibliothek ebenda vor. Dabei liegt der Schwerpunkt auf einer von Johann Sebastian Bach und einem weiteren Kopisten, möglicherweise Johann Gottlieb August Fritzsche, gefertigten Abschrift der ersten beiden Sätze von Francesco Gasparinis Missa canonica. Im Folgenden werden weitere Quellen Leipziger Provenienz aus der vorgefundenen Sammlung vorgestellt und dabei besonders auf Johann Gottlieb Wiedner und Carl Hartwig eingegangen, die mit mehreren Werken als Urheber wie Kopisten in der Sammlung vertreten sind. Abschließend wird auf zwei Handschriften hingewisen, die weitere Kopisten aus Bachs Umfeld betreffen.
Erwähnte Artikel: Bernhard Friedrich Richter: Stadtpfeifer und Alumnen der Thomasschule in Leipzig zu Bachs Zeit. BJ 1907, S. 32-78
Hermann von Hase: Breitkopfsche Textdrucke zu Leipziger Musikaufführungen zu Bachs Zeiten. BJ 1913, S. 69-127
Hans Löffler: Die Schüler Joh. Seb. Bachs. BJ 1953, S. 5-28
Daniel R. Melamed: Eine Motette Sebastian Knüpfers aus J. S. Bachs Notenbibliothek. BJ 1989, S. 191-196
Michael Maul: Der 200. Jahrestag des Augsburger Religionsfriedens (1755) und die Leipziger Bach-Pflege in der zweiten Hälfte des 18. Jahrhunderts. BJ 2000, S. 101-118
Barabara Wiermann: Bach und Palestrina. Neue Quellen aus Johann Sebastian Bachs Notenbibliothek. BJ 2002, S. 9-28
Peter Wollny: Tennstedt, Leipzig, Naumburg, Halle - Neuerkenntnisse zur Bach-Überlieferung in Mitteldeutschland. BJ 2002, S. 29-60
Daniel R. Melamed: Bach und Palestrina - Einige praktische Probleme I. BJ 2003, S. 221-224
Barbara Wiermann: Bach und Palestrina - Einige praktische Probleme II. BJ 2003, S. 225-228
Andreas Glöckner: Alumnen und Externe in den Kantoreien der Thomasschule zur Zeit Bachs. BJ 2006, S. 9-36
Michael Maul: Johann Adolph Scheibes Bach-Kritik. Hintergründe und Schauplätze einer musikalischen Kontroverse. BJ 2010, S. 153-198
Tatjana Schabalina: Die "Leges" des "Neu aufgerichteten Collegium Musicum" (1729) - Ein unbekanntes Dokument zur Leipziger Musikgeschichte. BJ 2012, S. 107-120
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Maul, Michael, and Peter Wollny. "Quellenkundliches zu Bach-Aufführungen in Köthen, Ronneburg und Leipzig zwischen 1720 und 1760." Bach-Jahrbuch 89 (March 12, 2018): 97–141. http://dx.doi.org/10.13141/bjb.v20031784.
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Die drei Fallstudien des Artikels stellen neue Erkenntnisse zur Biografie Johann Sebastian Bachs und der frühen Rezeption seines Schaffens vor. Es geht dabei im Einzelnen um eine Köthener Aufführung von Kantate BWV 21 Ich hatte viel Bekümmernis durch Bach selbst vermutlich 1721; Johann Wilhelm Koch und die Bach-Pflege in Ronneburg; schließlich um den "Schreiber der Doles-Partituren", der als der Thomasschüler und spätere Bornaer Kantor Carl Friedrich Barth identifiziert wird und Hinweis auf die Leipziger Bach-Pflege nach 1750 gibt. Im Anhang werden einige der den Erkenntnissen zugrundeliegenden Quellen in Umschriften bzw. Faksimiles wiedergegeben.
Erwähnte Artikel:
Bernhard Friedrich Richter: Stadtpfeifer und Alumnen der Thomasschule in Leipzig zu Bachs Zeit. BJ 1907, S. 32-78
Ernst König: Neuerkenntnisse zu J. S. Bachs Köthener Zeit. BJ 1957, S. 163-167
Christoph Wolff: "Die betrübte und wieder getröstete Seele": Zum Dialog-Charakter der Kantate "Ich hatte viel Bekümmernis" BWV 21. BJ 1996, S. 139-146
Michael Maul: Der 200. Jahrestag des Augsburger Religionsfriedens (1755) und die Leipziger Bach-Pflege in der zweiten Hälfte des 18. Jahrhunderts. BJ 2000, S. 101-118
Peter Wollny: Tennstedt, Leipzig, Naumburg, Halle - Neuerkenntnisse zur Bach-Überlieferung in Mitteldeutschland. BJ 2002, S. 29-60
Weiterführende Artikel:
Rainer Kaiser: Palschaus Bach-Spiel in London. Zur Bach-Pflege in England um 1750. BJ 1993, S. 225-230
Ulrich Leisinger: "Es erhub sich ein Streit" (BWV 19). Carl Philipp Emanuel Bachs Aufführungen im Kontext der Hamburger Michaelismusiken. BJ 1999, S. 105-126
Andrew Talle: Nürnberg, Darmstadt, Köthen - Neuerkenntnisse zur Bach-Überlieferung in der ersten Hälfte des 18. Jahrhunderts. BJ 2005, S. 143-172
Michael Maul: Zur zeitgenössischen Verbreitung von Bachs Vokalwerken in Mitteldeutschland. BJ 2005, S. 95-108
Uwe Wolf: Zur Leipziger Aufführungstradition der Motetten Bachs im 18. Jahrhundert. BJ 2005, S. 301-310
Anselm Hartinger: Materialien und Überlegungen zu den Bach-Aufführungen August Eberhard Müllers. BJ 2006, S. 171-204
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Brysbaert, Marc, Matthias Buchmeier, Markus Conrad, Arthur M. Jacobs, Jens Bölte, and Andrea Böhl. "The Word Frequency Effect." Experimental Psychology 58, no. 5 (July 1, 2011): 412–24. http://dx.doi.org/10.1027/1618-3169/a000123.
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We review recent evidence indicating that researchers in experimental psychology may have used suboptimal estimates of word frequency. Word frequency measures should be based on a corpus of at least 20 million words that contains language participants in psychology experiments are likely to have been exposed to. In addition, the quality of word frequency measures should be ascertained by correlating them with behavioral word processing data. When we apply these criteria to the word frequency measures available for the German language, we find that the commonly used Celex frequencies are the least powerful to predict lexical decision times. Better results are obtained with the Leipzig frequencies, the dlexDB frequencies, and the Google Books 2000–2009 frequencies. However, as in other languages the best performance is observed with subtitle-based word frequencies. The SUBTLEX-DE word frequencies collected for the present ms are made available in easy-to-use files and are free for educational purposes.
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Gärtner, Kurt. "Personendateien. Workshop der Arbeitsgruppe „Elektronisches Publizieren“ der Union der deutschen Wissenschaftsakademien, Leipzig, 21.–23. September 2009." Editio 24, no. 2010 (December 13, 2010): 223–31. http://dx.doi.org/10.1515/9783110223163.1.223.
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Hübner, Maria. "Zur finanziellen Situation der Witwe Anna Magdalena Bach und ihrer Töchter." Bach-Jahrbuch 88 (March 9, 2018): 245–56. http://dx.doi.org/10.13141/bjb.v20021752.
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Der Beitrag untersucht die finanzielle Situation Anna Magdalena Bachs und ihrer Töchter nach 1750 genauer und ermittelt Herkunft und Höhe ihrer Einkünfte.
Erwähnte Artikel: Stefan Altner: Wiedergefundene Legat-Quittungsbücher und Matrikelverzeichnisse der Leipziger Thomasschule, die auch die Bach-Zeit berühren. BJ 2000, S. 119-137
Peter Wollny: Tennstedt, Leipzig, Naumburg, Halle – Neuerkenntnisse zur Bach-Überlieferung in Mitteldeutschland. BJ 2002, S. 29-60
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Müller, Beate. "Café Zeitsprung: Das etwas andere Tandemprojekt mit Studierenden der Universität Leipzig und der Ritsumeikan-Universität Kyōto (Japan)." Informationen Deutsch als Fremdsprache 36, no. 5 (October 1, 2009): 435–46. http://dx.doi.org/10.1515/infodaf-2009-0504.
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Anderson, Jeffrey. "From the Bonn to the Berlin Republic: The Twentieth Anniversary of German Unification: Introduction." German Politics and Society 28, no. 1 (March 1, 2010): 1–9. http://dx.doi.org/10.3167/gps.2010.280101.
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‘Tis the season of anniversaries in Germany. 2009 unfolded like a hitparade of history. March ushered in the sixtieth anniversary of the foundingof the Federal Republic and May witnessed the sixtieth anniversary ofthe end of the Berlin Blockade. After a summer lull, the seventiethanniversary of Nazi Germany’s invasion of Poland fell on 1 Septemberand in October, the twentieth anniversary of the first Monday demonstrationin Leipzig took place. Finally, the month of November offered up amajor date—the twentieth anniversary of the fall of the Berlin Wall—and alesser one, suited more for the political connoisseur: the fortieth anniversaryof the Social Democratic Party’s (SPD) ratification of the GodesbergerProgram. 2010, of course, culminates in October with the twentiethanniversary of unification.
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Rifkin, Joshua. "Chorliste und Chorgröße bei Johann Sebastian Bach. Neue Überlegungen zu einem alten Thema." Bach-Jahrbuch 98 (February 9, 2018): 121–43. http://dx.doi.org/10.13141/bjb.v20121207.
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Der Text tritt einigen nach Meinung des Autors fehlerhaften Interpretationen von Originaldokumenten zur Bach‘schen Aufführungspraxis, besonders zu Umfang und Besetzung seiner Chöre, entgegen. Im Folgenden wird detailliert auf eine Auswahl solcher Dokumente (Schul- und Gottesdienstordnungen, Choraufstellungen) und jeweiligen Interpretationen eingegangen, die auf ihre Aussagekraft geprüft werden. Ergebnis der Auswertung ist die Behauptung, Thesen zur Chorgröße in Bachs Aufführungen, die einseitig auf Grundlage dieser Texte gestellt würden, seien bar jeder tragfähigen Begründung.
Erwähnte Artikel: Bernhard Friedrich Richter: Stadtpfeifer und Alumnen der Thomasschule in Leipzig zu Bachs Zeit. BJ 1907, S. 32-78
Hans-Joachim Schulze: Studenten als Bachs Helfer bei der Leipziger Kirchenmusik. BJ 1984, S. 45-72
Christine Fröde: Zu einer Kritik des Thomanerchores von 1749. BJ 1984, S. 53-58
Andreas Glöckner: "... daß ohne Hülffe derer Herren Studiosorum der Herr Cantor keine vollstimmende Music würde bestellen können ...". Bemerkungen zur Leipziger Kirchenmusik vor 1723 und nach 1750. BJ 2001, S. 131-140
Hans-Joachim-Schulze: Rezension zu: Andrew Parrott: Bachs Chor [...]. BJ 2003, S. 267-270
Andreas Glöckner: Alumnen und Externe in den Kantoreien der Thomasschule zur Zeit Bachs. BJ 2006, S. 9-36
Martin Petzoldt: Zum Verhältnis Friedrich Nietzsches zu Johann Sebastian Bach - Nietzsches Urgroßvater, Alumnus der Thomasschule und Präfekt unter Bach. BJ 2007, S. 229-242
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Tamošaitienė, Jolanta, Lina Bartkienė, and Tatjana Vilutienė. "THE NEW DEVELOPMENT TREND OF OPERATIONAL RESEARCH IN CIVIL ENGINEERING AND SUSTAINABLE DEVELOPMENT AS A RESULT OF COLLABORATION BETWEEN GERMAN‐LITHUANIAN‐POLISH SCIENTIFIC TRIANGLE." Journal of Business Economics and Management 11, no. 2 (June 30, 2010): 316–40. http://dx.doi.org/10.3846/jbem.2010.16.
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In this article the scientific cooperation between the three academic centres from Germany, Lithuania and Poland, represented by Prof. F. Peldschus (Leipzig University of Applied Sciences), Prof. E. K. Zavadskas (Vilnius Gediminas Technical University), and Prof. O. Kapliński (Poznan University of Technology), is presented. Formal meetings have been called Colloquia, and were organized every two years in different academic centres. The research achievements and activities during the period of 2007–2009 are presented. The main research fields of OR in Civil Engineering and Sustainable Development of three academic centres are surveyed. As a result of productive collaboration in the period between the 11th and 12th Colloquiums, several postdoctoral theses and doctoral dissertations were defended, research papers and books were published and conferences were organized with published proceedings, etc. On the basis of these achievements EURO Working Group OR in Sustainable Development and Civil Engineering (EWG‐ORSDCE) was established. Santrauka Straipsnyje apžvelgiami mokslinio bendradarbiavimo rezultatai tarp Vokietijos, Lietuvos ir Lenkijos akademiniu centru. Šiu centru susitikimai buvo vadinami kolokviumais, kurie buvo organizuojami kas antrus metus skirtingame akademiniame centre. Šiame straipsnyje apžvelgiami moksliniai pasiekimai ir nuveikti darbai 2007–2009 m., pateikiami Vokietijos, Lietuvos ir Lenkijos akademiniu centru atlikti darbai operaciniu tyrimu, statybos inžinerijos ir subalansuotos pletros temomis. Produktyvaus bendradarbiavimo rezultatai nuo 11‐ojo iki 12‐ojo kolokviumo yra: apgintos habilitaciniu darbu tezes bei daktaro disertacijos, paskelbti moksliniai straipsniai ir išleistos knygos, suorganizuotos mokslines kon‐ferencijos ir išspausdinti konferenciju straipsniu rinkiniai. Remiantis šiais pasiekimais buvo isteigta darbo grupe " OR in Sustainable Development and Civil Engineering” (EWG‐ORSDCE).
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Glöckner, Andreas. "Ein weiterer Kantatenjahrgang Gottfried Heinrich Stölzels in Bachs Aufführungsrepertoire?" Bach-Jahrbuch 95 (March 13, 2018): 95–115. http://dx.doi.org/10.13141/bjb.v20091861.
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Die im BJ 2008 von Marc-Roderich Pfau und Peter Wollny vorgestellten Belege für Aufführungen von Kantaten G. H. Stölzels durch J. S. Bach setzt der Autor in Bezug zu seiner eigenen Arbeit an einem Verzeichnis des historischen Musikalienbestandes der Thomasschule. Aufgrund von Resten des Thomana-Archives, älteren Katalogen und verstreuten Indizien werden die für Aufführungen durch Bach in Frage kommenden Kantaten beschrieben. Insgesamt zwei von Bach musizierte Stölzelsche Kantatenjahrgänge und eine Passionsmusik lassen den Autor schließlich Rückschlüsse zu Bachs kirchenmusikalischem Schaffen nach 1730 ziehen. Ein Anhang gibt eine Übersicht zu Werkbestand und Überlieferung von Stölzels Kantatenjahrgang „Das Namenbuch Christi“.
Erwähnte Artikel: Christoph Wolff (et al.): Zurück in Berlin: Das Notenarchiv der Sing-Akademie. Bericht über eine erste Bestandsaufnahme. BJ 2002, S. 165-180
Michael Maul; Peter Wollny: Quellenkundliches zu Bach-Aufführungen in Köthen, Ronneburg und Leipzig zwischen 1720 und 1760. BJ 2003, S. 97-141
Tatjana Schabalina: "Texte zur Music" in Sankt Petersburg. Neue Quellen zur Leipziger Musikgeschichte sowie zur Kompositions- und Aufführungstätigkeit Johann Sebastian Bachs. BJ 2008, S. 33-98
Marc-Roderich Pfau: Ein unbekanntes Leipziger Kantatentextheft aus dem Jahr 1735 - Neues zum Thema Bach und Stölzel. BJ 2008, S. 99-122
Peter Wollny: "Bekennen will ich seinen Namen" - Authentizität, Bestimmung und Kontext der Arie BWV 200. Anmerkungen zu Johann Sebastian Bachs Rezeption von Werken Gottfried Heinrich Stölzels. BJ 2008, S. 123-158
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Schabalina, Tatjana. "Die "Leges" des "Neu aufgerichteten Collegium Musicum" (1729) - Ein unbekanntes Dokument zur Leipziger Musikgeschichte." Bach-Jahrbuch 98 (February 9, 2018): 107–20. http://dx.doi.org/10.13141/bjb.v20121206.
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Der Aufsatz wertet ein in der Handschriftenabteilung der Russischen Staatsbibliothek St. Petersburg aufbewahrtes Dokument mit den Regeln eines „neu aufgerichteten“ Collegium Musicum in Leipzig aus. Die Autorin gibt den gesamten Text wieder. Sie datiert die Handschrift und versucht sie im Folgenden mit einem der beiden aus der betreffenden Zeit bekannten Leipziger Collegia in Verbindung zu bringen. Auch die Interpretation des Manuskripts als Hinweis auf ein bisher unbekanntes Leipziger Collegium Musicum wird diskutiert.
Erwähnte Artikel: Werner Neumann: Das "Bachische Collegium Musicum". BJ 1960, S. 5-51
Hans-Joachim Schulze: Studenten als Bachs Helfer bei der Leipziger Kirchenmusik. BJ 1984, S. 45-72
Hildegard Tiggemann: Unbekannte Textdrucke zu drei Gelegenheitskantaten J. S. Bachs. BJ 1994, S. 7-22
Michael Maul: Neues zu Georg Balthasar Schott, seinem Collegium musicum und Bachs Zerbster Geburtstagskantate. BJ 2007, S. 61-103
Tatjana Schabalina: "Texte zur Music" in Sankt Petersburg. Neue Quellen zur Leipziger Musikgeschichte sowie zur Kompositions- und Aufführungstätigkeit Johann Sebastian Bachs. BJ 2008, S. 33-98
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KOTT, SANDRINE. "Everyday Communism: New Social History of the German Democratic Republic." Contemporary European History 13, no. 2 (May 2004): 233–47. http://dx.doi.org/10.1017/s0960777304001699.
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Konrad Jarausch, ed., Dictatorship as Experience. Toward a Socio-Cultural History of the GDR (New York and Oxford: Berghahn Books, 1999), 388 pp., £14.00 (pb), ISBN 1-57181-182-6.Thomas Lindenberger, ed., Herrschaft und Eigensinn in der Diktatur (Cologne, Weimar and Vienna: Böhlau Verlag, 1999) 367 pp., €39.90 (hb), ISBN 3-412-13598-4.Annegret Schüle, ‘Die Spinne’. Die Erfahrungsgeschichte weiblicher Industriearbeit im VEB Leipziger Baumwollspinnerei (Leipzig: Leipziger Universitätsverlag, 2001), 398 pp., €18.00 (pb), ISBN 3-934565-87-5.Patrick Major and Jonathan Osmond, eds., The Workers' and Peasants' State. Communism and Society in East Germany under Ulbricht 1945–71 (Manchester: Manchester University Press, 2002), 272 pp., £15.99 (pb), ISBN 0-7190-6289-6.Joshua Feinstein, The Triumph of the Ordinary. Depictions of Daily Life in the East German Cinema 1949–1989 (Chapel Hill: University of North Carolina Press, 2002), 331 pp., £19.50 (pb), ISBN 0-8078-5385-2.
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Schabalina, Tatjana. ""Texte zur Music" in Sankt Petersburg. Neue Quellen zur Leipziger Musikgeschichte sowie zur Kompositions- und Aufführungstätigkeit Johann Sebastian Bachs." Bach-Jahrbuch 94 (March 13, 2018): 33–98. http://dx.doi.org/10.13141/bjb.v20081898.
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Der Artikel beleuchtet die verblüffend reichhaltige Überlieferung von für die Bachforschung relevanten Textdrucken des 18. Jh. in der russischen Staatsbibliothek St. Petersburg und bietet über die im BJ 1973 von Wolfgang Hobohm gebotene Übersicht der damals bekannten Quellen (Link s.u.) hinaus eine Bibliografie neu aufgefundener Textdrucke zu Vokalwerken Bachs und seiner Zeitgenossen (S. 35-43). Genauer werden daraufhin Textdrucke zu Werken von Vorgängern und Nachfolgern J. S. Bachs dargestellt (mit Incipits der einzelnen Sätze) (S. 43-61). Textdrucke zu Werken von Bach selbst werden in zwei Abteilungen behandelt; S. 61-77 geistliche, S. 85-88 weltliche Kantaten. Dazwischen wird der Text des Passionsoratoriums von 1734 erläutert, der erstmals die genaue Bestimmung dieses Werkes als Ein Lämmlein geht und trägt die Schuld G. H. Stölzels erlaubt. Weitere Beobachtungen und Schlüsse aus dem reichhaltigen Fund vervollständigen den Artikel.
Erwähnte Artikel: John W. Grubbs: Ein Passions-Pasticcio des 18. Jahrhunderts. BJ 1965, S. 10-42
Hans-Jaochim Schulze: Johann Sebastian Bach und Christian Gottlob Meißner. BJ 1968, S. 80-88
Wolf Hobohm: Neue "Texte zur Leipziger Kirchen-Music". BJ 1973, S. 5-32
Andreas Glöckner: Johann Sebastian Bachs Aufführungen zeitgenössischer Passionsmusiken. BJ 1977, S. 75-119
Hans-Joachim Schulze: Ein "Dresdner Menuett" im zweiten Klavierbüchlein der Anna Magdalena Bach. Nebst Hinweisen zur Überlieferung einiger Kammermusikwerke Bachs. BJ 1979, S. 45-64
Hans-Joachim Schulze: "Entfernet euch, ihr heitern Sterne", BWV Anh. 9. BJ 1985, S. 166-168
Christine Fröde: Zur Entstehung der Kantate "Ihr Tore zu Zion" (BWV 193). BJ 1991, S. 183-186
Ulrich Leisinger, Peter Wollny: "Altes Zeug von mir". Carl Philipp Emanuel Bachs kompositorisches Schaffen vor 1740. BJ 1993, S. 127-204
Wolf Hobohm: Kantatentextsammlungen der ersten Hälfte des 18. Jahrhunderts - Texte zur Musik? BJ 1997, S. 185-192
Peter Wollny: Tennstedt, Leipzig, Naumburg, Halle - Neuerkenntnisse zur Bach-Überlieferung in Mitteldeutschland. BJ 2002, S. 29-60
Christoph Wolff (et al.): Zurück in Berlin: Das Notenarchiv der Sing-Akademie. BJ 2002, S. 165-180
Peter Wollny: "Bekennen will ich seinen Namen" - Authentizität, Bestimmung und Kontext der Arie BWV 200. Anmerkungen zu Johann Sebastian Bachs Rezeption von Werken Gottfried Heinrich Stölzels. BJ 2008, S. 123-158
Vergleiche auch: Tatjana Schabalina: "Texte zur Music" in Sankt Petersburg - Weitere Funde. BJ 2009, S. 11-48
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Simpfendörfer, Gottfried. "Die Leipziger Pfingstkantate von 1721 - ein Werk von Johann Sebastian Bach?" Bach-Jahrbuch 96 (March 13, 2018): 275–79. http://dx.doi.org/10.13141/bjb.v20101888.
Full textAbstract:
Der Beitrag liefert Überlegungen, Vermutungen und Gedankenspiele vorläufigen Charakters zur Frage, ob mit der in Leipzig 1721 aufgeführten, jedoch nur im Text überlieferten Kantate Erschallet, ihr Lieder notwendigerweise das textlich gleichlautende Werk BWV 172 von 1714 identifiziert werden muss.
Erwähnte Artikel: Ulrich Siegele: Bachs Stellung in der Leipziger Kulturpolitik seiner Zeit (Fortsetzung). BJ 1984, S. 7-44
Klaus Hofmann: Neue Überlegungen zu Bachs Weimarer Kantaten-Kalender. BJ 1993, S. 9-30
Joachim Kremer: Die Organistenstelle an St. Jakobi in Hamburg: eine "convenable station" für Johann Sebastian Bach? BJ 1993, S. 217-222
Tatjana Schabalina: "Texte zur Music" in Sankt Petersburg. Neue Quellen zur Leipziger Musikgeschichte sowie zur Kompositions- und Aufführungstätigkeit Johann Sebastian Bachs. BJ 2008, S. 33-98
Andreas Glöckner: Johann Sebastian Bach und die Universität Leipzig - Neue Quellen (Teil I). BJ 2008, S. 159-202
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Kubal, C., D. Haase, V. Meyer, and S. Scheuer. "Integrated urban flood risk assessment – adapting a multicriteria approach to a city." Natural Hazards and Earth System Sciences 9, no. 6 (November 17, 2009): 1881–95. http://dx.doi.org/10.5194/nhess-9-1881-2009.
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Abstract. Flood risk assessment is an essential part of flood risk management. As part of the new EU flood directive it is becoming increasingly more popular in European flood policy. Particularly cities with a high concentration of people and goods are vulnerable to floods. This paper introduces the adaptation of a novel method of multicriteria flood risk assessment, that was recently developed for the more rural Mulde river basin, to a city. The study site is Leipzig, Germany. The "urban" approach includes a specific urban-type set of economic, social and ecological flood risk criteria, which focus on urban issues: population and vulnerable groups, differentiated residential land use classes, areas with social and health care but also ecological indicators such as recreational urban green spaces. These criteria are integrated using a "multicriteria decision rule" based on an additive weighting procedure which is implemented into the software tool FloodCalc urban. Based on different weighting sets we provide evidence of where the most flood-prone areas are located in a city. Furthermore, we can show that with an increasing inundation extent it is both the social and the economic risks that strongly increase.
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Hohoff, Ulrich. "Tätigkeitsbericht des Vorsitzenden des Vereins Deutscher Bibliothekare e. V. (VDB) 2009/2010 zur Mitgliederversammlung am 18. März 2010 in Leipzig." Zeitschrift für Bibliothekswesen und Bibliographie 57, no. 3-4 (August 15, 2010): 213–19. http://dx.doi.org/10.3196/18642950105734163.
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McLain, Landon. "BREAST AUGMENTATION: PRINCIPLES AND PRACTICE BREAST AUGMENTATION: PRINCIPLES AND PRACTICE Authored by: Melvin A. Shiffman Publisher: Springer, Leipzig, Germany, 2009." American Journal of Cosmetic Surgery 28, no. 1 (March 2011): 44–45. http://dx.doi.org/10.5992/0748-8068-28.1.44.
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Leschik, S., A. Musolff, R. Krieg, M. Martienssen, M. Bayer-Raich, F. Reinstorf, G. Strauch, and M. Schirmer. "Application of integral pumping tests to investigate the influence of a losing stream on groundwater quality." Hydrology and Earth System Sciences Discussions 6, no. 3 (June 12, 2009): 4209–32. http://dx.doi.org/10.5194/hessd-6-4209-2009.
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Abstract. Losing streams that are influenced by wastewater treatment plant effluents and combined sewer overflows (CSO's) can be a source of groundwater contamination. Released micropollutants such as pharmaceuticals, endocrine disrupters and other ecotoxicologically relevant substances as well as inorganic wastewater constituents can reach the groundwater, where they may deteriorate groundwater quality. This paper presents a method to quantify exfiltration mass flow rates Mex of wastewater constituents from losing streams by the operation of integral pumping tests (IPT's) up- and downstream of a target section. Due to the large sampled water volume during IPT's the results are more reliable than those from conventional point sampling. We applied the method at a test site in Leipzig (Germany). Wastewater constituents K+ and NO3− showed Mex values of 1241 to 4315 and 749 to 924 mg m−1stream d−1, respectively, while Cl− (16.8 to 47.3 g m−1stream d−1) and SO42− (20.3 to 32.2 g m−1stream d−1) revealed the highest observed Mex values at the test site. The micropollutants caffeine and technical-nonylphenol were dominated by elimination processes in the groundwater between upstream and downstream wells. Additional concentration measurements in the stream and a connected sewer at the test site were performed to identify relevant processes that influence the concentrations at the IPT wells.
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Shenton, Helen. "Virtual Reunification, Virtual Preservation and Enhanced Conservation." Alexandria: The Journal of National and International Library and Information Issues 21, no. 2 (August 2009): 33–45. http://dx.doi.org/10.7227/alx.21.2.4.
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The digitization of dispersed collections offers the opportunity to do much more than simply image collections. The paper centres on major initiatives involving the British Library which are virtually reunifying significant collections dispersed around the world. Such virtual reconstruction of cultural heritage creates a different digital entity. The Codex Sinaiticus project has worked towards the July 2009 Web launch of the virtual reunification of all the leaves of one of the earliest extant Bibles. The approximately 400 leaves are physically located in St Catherine's Monastery, Mount Sinai, Leipzig University Library, the National Library of Russia, St Petersburg, and the British Library, London. The International Dunhuang Project is a very mature project that has been digitizing material from the Dunhuang caves and the Eastern Silk Road dispersed in London, Beijing, Dunhuang, St Petersburg, Berlin, Paris, Stockholm and Kyoto. These complex programmes have broad application to other cultural–historical projects, and some of the wider political, diplomatic and stewardship themes are developed.
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Skupin, A., A. Ansmann, R. Engelmann, H. Baars, and T. Müller. "The Spectral Aerosol Extinction Monitoring System (SǼMS): setup, observational products, and comparisons." Atmospheric Measurement Techniques 7, no. 3 (March 4, 2014): 701–12. http://dx.doi.org/10.5194/amt-7-701-2014.
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Abstract. The Spectral Aerosol Extinction Monitoring System (SǼMS) is presented that allows us to continuously measure the spectral extinction coefficient of atmospheric aerosol particles along an approximately 2.7 km long optical path at 30–50 m height above ground in Leipzig (51.3° N, 12.4° E), Germany. The fully automated instrument measures the ambient aerosol extinction coefficients from 300 to 1000 nm. The main goal of SǼMS observations are long-term studies of the relationship between particle extinction and relative humidity from below 40% to almost 100%. The setup is presented and observations (a case study and statistical results for 2009) are discussed in terms of time series of 550 nm particle optical depth, Ångström exponent, and particle size distribution retrieved from the spectrally resolved extinction. The SǼMS measurements are compared with simultaneously performed EARLINET (European Aerosol Research Lidar Network) lidar, AERONET (Aerosol Robotic Network) sun photometer, and in situ aerosol observations of particle size distribution and related extinction coefficients on the roof of our institute. Consistency between the different measurements is found, which corroborates the quality of the SǼMS observations. Statistical results of a period of 1 yr (2009) show mode extinction values of 0.09 km−1 (SǼMS), 0.075 km−1 (AERONET), and 0.03 km−1 (in situ). Ångström exponents for this period are 0.19 (390–880 nm, SǼMS) and 1.55 (440–870 nm, AERONET).
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Leschik, S., A. Musolff, R. Krieg, M. Martienssen, M. Bayer-Raich, F. Reinstorf, G. Strauch, and M. Schirmer. "Application of integral pumping tests to investigate the influence of a losing stream on groundwater quality." Hydrology and Earth System Sciences 13, no. 10 (October 1, 2009): 1765–74. http://dx.doi.org/10.5194/hess-13-1765-2009.
Full textAbstract:
Abstract. Losing streams that are influenced by wastewater treatment plant effluents and combined sewer overflows (CSOs) can be a source of groundwater contamination. Released micropollutants such as pharmaceuticals, endocrine disrupters and other ecotoxicologically relevant substances as well as inorganic wastewater constituents can reach the groundwater, where they may deteriorate groundwater quality. This paper presents a method to quantify exfiltration mass flow rates per stream length unit Mex of wastewater constituents from losing streams by the operation of integral pumping tests (IPTs) up- and downstream of a target section. Due to the large sampled water volume during IPTs the results are more reliable than those from conventional point sampling. We applied the method at a test site in Leipzig (Germany). Wastewater constituents K+ and NO3− showed Mex values of 1241 to 4315 and 749 to 924 mg mstream−1 d−1, respectively, while Cl− (16.8 to 47.3 g mstream−1 d−1) and SO42− (20.3 to 32.2 g mstream−1 d−1) revealed the highest observed Mex values at the test site. The micropollutants caffeine and technical-nonylphenol were dominated by elimination processes in the groundwater between upstream and downstream wells. Additional concentration measurements in the stream and a connected sewer at the test site were performed to identify relevant processes that influence the concentrations at the IPT wells.
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Niedermeier, D., S. Hartmann, R. A. Shaw, D. Covert, Th F. Mentel, J. Schneider, L. Poulain, et al. "Heterogeneous freezing of droplets with immersed mineral dust particles – measurements and parameterization." Atmospheric Chemistry and Physics Discussions 9, no. 4 (July 24, 2009): 15827–65. http://dx.doi.org/10.5194/acpd-9-15827-2009.
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Abstract. During the measurement campaign FROST (FReezing Of duST), LACIS (Leipzig Aerosol Cloud Interaction Simulator) was used to investigate the immersion freezing behavior of coated and uncoated Arizona Test Dust (ATD) particles with a mobility diameter of 300 nm. Particles were coated with succinic acid (C4H6O4), sulfuric acid (H2SO4, two different coating conditions), and ammonium sulfate ((NH4)2SO4). Ice fractions at temperatures between 233.15 K and 240.65 K were determined for all types of particles acting as IN (Ice Nuclei). In this temperature range, uncoated particles and those coated with C4H6O4 or small amounts of H2SO4 started to act as IN at higher temperatures compared to particles with larger amounts of H2SO4 or (NH4)2SO4 coatings. Although the latter two showed similar hygroscopic growth and droplet activation behavior, they differed in their ability to act as IN. ATD particles coated with (NH4)2SO4 were the most inefficient IN. The ability of the investigated particles to act as IN was found not to be related to water activity for the freezing process investigated, however, in LACIS, the supercooled droplets were activated and highly diluted before the freezing occurred. Applying the measurement results, a parameterization, based on a simplified CNT (Classical Nucleation Theory) type nucleation rate expression, was developed. The simplified theory allows us to determine that thermodynamic changes at the surface are dominating the change in nucleating ability, rather than changes in surface area or kinetic effects.
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Skupin, A., A. Ansmann, R. Engelmann, and H. Baars. "Spectral Aerosol Extinction Monitoring System (SÆMS): setup, observational products, and comparisons." Atmospheric Measurement Techniques Discussions 6, no. 5 (October 1, 2013): 8647–77. http://dx.doi.org/10.5194/amtd-6-8647-2013.
Full textAbstract:
Abstract. A Spectral Aerosol Extinction Monitoring System (SÆMS) is presented that allows us to continuously measure the spectral extinction coefficient of atmospheric aerosol particles along an about 2.7 km long optical path at 30–50 m height above ground at Leipzig (51.3° N, 12.4° E), Germany. The fully automated instrument measures the ambient aerosol extinction coefficients from 300–1000 nm. The main goal of SÆMS observations are long-term studies of the relationship between particle extinction and relative humidity from below 40 % to almost 100 %. The setup is presented and observations (a case study and statistical results for 2009) are discussed in terms of time series of 550 nm particle optical depth, Ångström exponent, and particle size distribution retrieved from the spectrally resolved extinction. The SÆMS measurements are compared with simultaneously performed EARLINET lidar, AERONET photometer, and in situ aerosol observations of particle size distribution and related extinction coefficients at the roof of our institute. Consistency between the different measurements is found which corroborates the quality of the SÆMS observations.
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Weber, Heiko. "Braune, Andreas: Fortschritt als Ideologie: Wilhelm Ostwald und der Monismus. Leipzig, Universitätsverlag, 2009. 168 S. € 19,90. ISBN 978-3-86583-389-1." Gesnerus 67, no. 2 (November 11, 2010): 268–70. http://dx.doi.org/10.1163/22977953-06702008.
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Glöckner, Andreas. "Figuralaufführungen in der Leipziger Johanniskirche zur Zeit Johann Sebastian Bachs." Bach-Jahrbuch 98 (February 9, 2018): 163–79. http://dx.doi.org/10.13141/bjb.v20121209.
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Der Text schildert eingehend kirchliche und liturgische Verhältnisse der Leipziger Johanniskirche im 18. Jahrhundert und belegt anhand detailliert dargestellter Vergütungsbelege die Mitwirkung der Thomaner an der dortigen Figuralmusik. Daran knüpfen Überlegungen zur Arbeitsweise Bachs wie zur Aufführungspraxis seiner Werke an.
Erwähnter Artikel: Andreas Glöckner: Johann Sebastian Bach und die Universität Leipzig - Neue Quellen (Teil I). BJ 2008, S. 159-201
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Hamrin-Dahl, Tina. "This-worldly and other-worldly: a holocaust pilgrimage." Scripta Instituti Donneriani Aboensis 22 (January 1, 2010): 122–62. http://dx.doi.org/10.30674/scripta.67365.
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This story is about a kind of pilgrimage, which is connected to the course of events which occurred in Częstochowa on 22 September 1942. In the morning, the German Captain Degenhardt lined up around 8,000 Jews and commanded them to step either to the left or to the right. This efficient judge from the police force in Leipzig was rapid in his decisions and he thus settled the destinies of thousands of people. After the Polish Defensive War of 1939, the town (renamed Tschenstochau) had been occupied by Nazi Germany, and incorporated into the General Government. The Nazis marched into Częstochowa on Sunday, 3 September 1939, two days after they invaded Poland. The next day, which became known as Bloody Monday, approximately 150 Jews were shot deadby the Germans. On 9 April 1941, a ghetto for Jews was created. During World War II about 45,000 of the Częstochowa Jews were killed by the Germans; almost the entire Jewish community living there.The late Swedish Professor of Oncology, Jerzy Einhorn (1925–2000), lived in the borderhouse Aleja 14, and heard of the terrible horrors; a ghastliness that was elucidated and concretized by all the stories told around him. Jerzy Einhorn survived the ghetto, but was detained at the Hasag-Palcery concentration camp between June 1943 and January 1945. In June 2009, his son Stefan made a bus tour between former camps, together with Jewish men and women, who were on this pilgrimage for a variety of reasons. The trip took place on 22–28 June 2009 and was named ‘A journey in the tracks of the Holocaust’. Those on the Holocaust tour represented different ‘pilgrim-modes’. The focus in this article is on two distinct differences when it comes to creed, or conceptions of the world: ‘this-worldliness’ and ‘other- worldliness’. And for the pilgrims maybe such distinctions are over-schematic, though, since ‘sacral fulfilment’ can be seen ‘at work in all modern constructions of travel, including anthropology and tourism’.
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Gabryś, Katarzyna. "Linkage of "Lakes Zwenkau-Cospuden" as one of the elements of land reclamation after the open-cast mines and its future importance for the development of the region." Annals of Warsaw University of Life Sciences - SGGW. Land Reclamation 44, no. 1 (January 1, 2012): 35–45. http://dx.doi.org/10.2478/v10060-011-0060-2.
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Linkage of "Lakes Zwenkau-Cospuden" as one of the elements of land reclamation after the open-cast mines and its future importance for the development of the region The open-cast mine "Böhlen", closed in 1921, in 1969 was transformed into "Zwenkau"("Zw") open-cast mine. In the seventies, together with its smaller neighbouring mine "Cospuden"("Cs"), became one of the greatest enterprises of the Central German lignite mining area. In the last centuries Zw and Cs mines had an significant influence on the economic, technical and scientific progress of this region. Although the mines were in separate mining areas, very close relations of proximity existed between them, particularly in the superposition of the lowering ground water areas. Thus, the total mass of the mine tailings "Cospuden" in the mining sector "Zwenkau" was flattened and designed for land reclamation. Since the cessation of lignite mining in the area Böhlen/Zwenkau/Cospuden the south region from Leipzig has been changed fundamentally. The remaining holes, which mines left behind, became lakes. Along the lakes raised beaches, ports and holiday houses. Lusatia and Central German Mining Administration Company (LMBV), which is now responsible for the reclamation and rehabilitation of disused mines, proposed a new perspective of this region, perceived as a part of nature and human-being. The main emphasis has been placed on the development of created lakes, flow-up phase and good water quality assurance. Some of the new lakes are connected together with artificial canals and locks. This also relates to "Zwenkau-Cospuden Lakes" (LMBV 2009). In this article the methods of management former mining areas in the South from Leipzig, with the great accent put on the linkage of "Lakes Zwenkau-Cospuden", are described. Necessary test on the soil samples from this field are explained. Finally, the influence of the restoration of the area on the development of the region is shown.
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Scholz, Peter. "Iskander, Sameh: Hinkende Ehen zwischen islamischem Recht und europäischem Internationalen Privatrecht. Dargestellt am Beispiel Deutschlands und Ägyptens. (Zugl.: Leipzig, Univ., Diss., 2009.) – Hambu." Rabels Zeitschrift für ausländisches und internationales Privatrecht 75, no. 3 (2011): 686. http://dx.doi.org/10.1628/003372511796351412.
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Ley, Isabelle. "Which role for theory in international law? Report on the Workshop “Kelsen — Schmitt — Arendt: Constitutionalism in (International) Law”, Leipzig, June 11/12, 2009." German Law Journal 11, no. 11 (November 2010): 1306–22. http://dx.doi.org/10.1017/s2071832200020241.
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AbstractLaw is a discipline which allows us to combine a high level of doctrinal craftsmanship with an equally high level of theoretical reflection and (re-)construction of legal-political developments. For the academic scholar, law is practice, theory and doctrine, each requiring a distinct set of goals, a distinct set of methods and a distinct level of abstraction. For some time, the international legal discipline has been described as lacking in theoretical development. This consideration may have motivated the conveners of a Kelsen-Schmitt-Arendt conference series when they decided that it was time for a re-engagement with the theories of Kelsen, Schmitt, and Arendt. The first workshop on constitutionalism will be the object of this commentary.Kelsen, Schmitt and Arendt have experienced unexpected and innovative reception in recent years: Schmitt has contributed to questions such as the problematic role of human rights, the institutionalization of politics as conflict, as well as new applications of the state of exception. Kelsen's international writings as well as his democratic theory have borne a fruitful re-reading, and Arendt, who has been widely read, and written about in the social sciences for several years, has finally reached the law faculties.The primary interest of this comment lies in the question of how international legal scientific work can make use of legal and political theory. A whole range of politico-legal developments in the European and international arenas are currently creating new forms of institutions, obligations, and types of engagement between legal orders. The velocity and the diversity of these developments are challenging traditional frameworks, paradigms, and analytical tools of the discipline. This task of conceptualization asks for and lends itself to theorization. Which approaches to theory are available for legal scholars, and what kind of insights do they offer? The conference offered the chance to witness different examples of how theory can be accessed. What role is there for theory in international law and what is its potential?
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Engler, C., W. Birmili, G. Spindler, and A. Wiedensohler. "Analysis of exceedances in the daily PM<sub>10</sub> mass concentration (50 μg m<sup>−3</sup>) at a roadside station in Leipzig, Germany." Atmospheric Chemistry and Physics 12, no. 21 (November 5, 2012): 10107–23. http://dx.doi.org/10.5194/acp-12-10107-2012.
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Abstract. Five years of PM10 and PM2.5 ambient air measurements at a roadside, an urban, and a regional background site in Leipzig (Germany) were analyzed for violations of the legal PM10 limit value (EC, 1999). The annual mean PM10 concentrations at the three sites were well below the legal threshold of 40 μg m−3 (32.6, 22.0 and 21.7 μg m−3, respectively). At roadside, the daily maximum value of 50 μg m−3 was exceeded on 232 days (13% of all days) in 2005–2009, which led to a violation of the EC directive in three out of five years. We analysed the meteorological factors and local source contributions that eventually led to the exceedances of the daily limit value. As noted in other urban environments before, most exceedance days were observed in the cold season. Exceedance days were most probable under synoptic situations characterised by stagnant winds, low temperatures and strong temperature inversions in winter time. However, these extreme situations accounted for only less than half of the exeedance days. We also noticed a significant number of exceedance days that occurred in the cold season under south-westerly winds, and in the warm season in the presence of easterly winds. Our analysis suggests that local as well as regional sources of PM are equally responsible for exceedances days at the roadside site. The conclusion is that a combined effort of local, national and international reduction measures appears most likely to avoid systematic exceedances of the daily limit value in the future.
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Poulain, L., Z. Wu, M. D. Petters, H. Wex, E. Hallbauer, B. Wehner, A. Massling, S. M. Kreidenweis, and F. Stratmann. "Towards closing the gap between hygroscopic growth and CCN activation for secondary organic aerosols – Part 3: Influence of the chemical composition on the hygroscopic properties and volatile fractions of aerosols." Atmospheric Chemistry and Physics Discussions 9, no. 4 (August 7, 2009): 16683–714. http://dx.doi.org/10.5194/acpd-9-16683-2009.
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Abstract. The influence of varying levels of water mixing ratio, r, during the formation of secondary organic aerosol (SOA) from the ozonolysis of α-pinene on the SOA hygroscopicity and volatility was investigated. The reaction proceeded and aerosols were generated in a mixing chamber and the hygroscopic characteristics of the SOA were determined with LACIS (Leipzig Aerosol Cloud Interaction Simulator) and a Cloud Condensation Nuclei counter (CCNc). In parallel, a High-Resolution Time-of-Flight Aerodyne Aerosol Mass Spectrometer (HR-ToF-AMS) located downstream of a thermodenuder (TD) sampling from the mixing chamber, to collect mass spectra of particles from the volatile and non-volatile fractions of the SOA. Results showed that both hygroscopic growth and the volatile fraction of the SOA increased with increases in r inside the mixing chamber during SOA generation. An effective density of 1.40 g cm−3 was observed for the generated SOA when the reaction proceeded with r>1 g kg−1. Changes in the concentrations of the fragment CO2+ and the sum of CxHyOz+ (short name CHO) and CxHy+ (short name CH) fragments as measured by the HR-ToF-AMS were used to estimate changes in the oxidation level of the SOA with reaction conditions, using the ratios CO2+ to CH and CHO to CH. Under humid conditions, both ratios increased, corresponding to the presence of more oxygenated functional groups (i.e., carboxylic groups). This result is consistent with the α-pinene ozonolysis mechanisms which suggest that water interacts with the stabilized Criegee intermediate. The volatility and the hygroscopicity results show that SOA generation via ozonolysis of α-pinene in the presence of water vapour (r<16.884 g kg−1) leads to the formation of more highly oxygenated compounds that are more hygroscopic and more volatile than compounds formed under dry conditions.
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Chaikovsky, Anatoli, Oleg Dubovik, Brent Holben, Andrey Bril, Philippe Goloub, Didier Tanré, Gelsomina Pappalardo, et al. "Lidar-Radiometer Inversion Code (LIRIC) for the retrieval of vertical aerosol properties from combined lidar/radiometer data: development and distribution in EARLINET." Atmospheric Measurement Techniques 9, no. 3 (March 21, 2016): 1181–205. http://dx.doi.org/10.5194/amt-9-1181-2016.
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Abstract. This paper presents a detailed description of LIRIC (LIdar-Radiometer Inversion Code) algorithm for simultaneous processing of coincident lidar and radiometric (sun photometric) observations for the retrieval of the aerosol concentration vertical profiles. As the lidar/radiometric input data we use measurements from European Aerosol Research Lidar Network (EARLINET) lidars and collocated sun-photometers of Aerosol Robotic Network (AERONET). The LIRIC data processing provides sequential inversion of the combined lidar and radiometric data. The algorithm starts with the estimations of column-integrated aerosol parameters from radiometric measurements followed by the retrieval of height dependent concentrations of fine and coarse aerosols from lidar signals using integrated column characteristics of aerosol layer as a priori constraints. The use of polarized lidar observations allows us to discriminate between spherical and non-spherical particles of the coarse aerosol mode.The LIRIC software package was implemented and tested at a number of EARLINET stations. Intercomparison of the LIRIC-based aerosol retrievals was performed for the observations by seven EARLINET lidars in Leipzig, Germany on 25 May 2009. We found close agreement between the aerosol parameters derived from different lidars that supports high robustness of the LIRIC algorithm. The sensitivity of the retrieval results to the possible reduction of the available observation data is also discussed.
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Chaikovsky, A., O. Dubovik, B. Holben, A. Bril, P. Goloub, D. Tanré, G. Pappalardo, et al. "Lidar-Radiometer Inversion Code (LIRIC) for the retrieval of vertical aerosol properties from combined lidar/radiometer data: development and distribution in EARLINET." Atmospheric Measurement Techniques Discussions 8, no. 12 (December 7, 2015): 12759–822. http://dx.doi.org/10.5194/amtd-8-12759-2015.
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Abstract. This paper presents a detailed description of LIRIC (LIdar-Radiometer Inversion Code) algorithm for simultaneous processing of coincident lidar and radiometric (sun photometric) observations for the retrieval of the aerosol concentration vertical profiles. As the lidar/radiometric input data we use measurements from European Aerosol Research Lidar Network (EARLINET) lidars and collocated sun-photometers of Aerosol Robotic Network (AERONET). The LIRIC data processing provides sequential inversion of the combined lidar and radiometric data by the estimations of column-integrated aerosol parameters from radiometric measurements followed by the retrieval of height-dependent concentrations of fine and coarse aerosols from lidar signals using integrated column characteristics of aerosol layer as a priori constraints. The use of polarized lidar observations allows us to discriminate between spherical and non-spherical particles of the coarse aerosol mode. The LIRIC software package was implemented and tested at a number of EARLINET stations. Intercomparison of the LIRIC-based aerosol retrievals was performed for the observations by seven EARLNET lidars in Leipzig, Germany on 25 May 2009. We found close agreement between the aerosol parameters derived from different lidars that supports high robustness of the LIRIC algorithm. The sensitivity of the retrieval results to the possible reduction of the available observation data is also discussed.
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Skupin, A., A. Ansmann, R. Engelmann, P. Seifert, and T. Müller. "Four-year long-path monitoring of ambient aerosol extinction at a central European urban site: dependence on relative humidity." Atmospheric Chemistry and Physics Discussions 15, no. 8 (April 29, 2015): 12583–616. http://dx.doi.org/10.5194/acpd-15-12583-2015.
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Abstract. The ambient aerosol particle extinction coefficient is measured with the Spectral Aerosol Extinction Monitoring System (SÆMS) along a 2.84 km horizontal path at 30–50 m height above ground in the urban environment of Leipzig (51.3° N, 12.4° E), Germany, since 2009. The dependence of the particle extinction coefficient (wavelength range from 300–1000 nm) on relative humidity up to almost 100% was investigated. The main results are presented. For the wavelength of 550 nm, the mean extinction enhancement factor was found to be 1.75 ± 0.4 for an increase of relative humidity from 40 to 80%. The respective four-year mean extinction enhancement factor is 2.8 ± 0.6 for a relative-humidty increase from 40 to 95%. A parameterization of the dependency of the urban particle extinction coefficient on relative humidity is presented. A mean hygroscopic exponent of 0.463 for the 2009–2012 period was determined. Based on a backward trajectory cluster analysis, the dependence of several aerosol optical properties for eight air flow regimes was investigated. Large differences were not found indicating that local pollution sources widely control the aerosol conditions over the urban site. The comparison of the SÆMS extinction coefficient statistics with respective statistics from ambient AERONET sun photometer observations yield good agreement. Also, time series of the particle extinction coefficient computed from in-situ-measured dry particle size distributions and humidity-corrected SÆMS extinction values (for 40% relative humidity) were found in good overall consistency, which corroborates the applicability of the developed humidity parameterization scheme. The analysis of the spectral dependence of particle extinction (Ångström exponent) revealed an increase of the 390–881 nm Ångström exponent from, on average, 0.3 (at 30% relative humidity) to 1.3 (at 95% relative humidity) for the four-year period.
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Skupin, A., A. Ansmann, R. Engelmann, P. Seifert, and T. Müller. "Four-year long-path monitoring of ambient aerosol extinction at a central European urban site: dependence on relative humidity." Atmospheric Chemistry and Physics 16, no. 4 (February 18, 2016): 1863–76. http://dx.doi.org/10.5194/acp-16-1863-2016.
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Abstract. The ambient aerosol particle extinction coefficient is measured with the Spectral Aerosol Extinction Monitoring System (SÆMS) along a 2.84 km horizontal path at 30–50 m height above ground in the urban environment of Leipzig (51.3° N, 12.4° E), Germany, since 2009. The dependence of the particle extinction coefficient (wavelength range from 300 to 1000 nm) on relative humidity up to almost 100 % was investigated. The main results are presented. For the wavelength of 550 nm, the mean extinction enhancement factor was found to be 1.75 ± 0.4 for an increase of relative humidity from 40 to 80 %. The respective 4-year mean extinction enhancement factor is 2.8 ± 0.6 for a relative-humidity increase from 40 to 95 %. A parameterization of the dependency of the urban particle extinction coefficient on relative humidity is presented. A mean hygroscopic exponent of 0.46 for the 2009–2012 period was determined. Based on a backward trajectory cluster analysis, the dependence of several aerosol optical properties for eight air flow regimes was investigated. Large differences were not found, indicating that local pollution sources widely control the aerosol conditions over the urban site. The comparison of the SÆMS extinction coefficient statistics with respective statistics from ambient AERONET sun photometer observations yields good agreement. Also, time series of the particle extinction coefficient computed from in situ-measured dry particle size distributions and humidity-corrected SÆMS extinction values (for 40 % relative humidity) were found in good overall consistency, which verifies the applicability of the developed humidity parameterization scheme. The analysis of the spectral dependence of particle extinction (Ångström exponent) revealed an increase of the 390–881 nm Ångström exponent from, on average, 0.3 (at 30 % relative humidity) to 1.3 (at 95 % relative humidity) for the 4-year period.
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Costabile, F., W. Birmili, S. Klose, T. Tuch, B. Wehner, A. Wiedensohler, U. Franck, K. König, and A. Sonntag. "Spatio-temporal variability and principal components of the particle number size distribution in an urban atmosphere." Atmospheric Chemistry and Physics 9, no. 9 (May 15, 2009): 3163–95. http://dx.doi.org/10.5194/acp-9-3163-2009.
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Abstract. A correct description of fine (diameter <1 μm) and ultrafine (<0.1 μm) aerosol particles in urban areas is of interest for particle exposure assessment but also basic atmospheric research. We examined the spatio-temporal variability of atmospheric aerosol particles (size range 3–800 nm) using concurrent number size distribution measurements at a maximum of eight observation sites in and around Leipzig, a city in Central Europe. Two main experiments were conducted with different time span and number of observation sites (2 years at 3 sites; 1 month at 8 sites). A general observation was that the particle number size distribution varied in time and space in a complex fashion as a result of interaction between local and far-range sources, and the meteorological conditions. To identify statistically independent factors in the urban aerosol, different runs of principal component (PC) analysis were conducted encompassing aerosol, gas phase, and meteorological parameters from the multiple sites. Several of the resulting PCs, outstanding with respect to their temporal persistence and spatial coverage, could be associated with aerosol particle modes: a first accumulation mode ("droplet mode", 300–800 nm), considered to be the result of liquid phase processes and far-range transport; a second accumulation mode (centered around diameters 90–250 nm), considered to result from primary emissions as well as aging through condensation and coagulation; an Aitken mode (30–200 nm) linked to urban traffic emissions in addition to an urban and a rural Aitken mode; a nucleation mode (5–20 nm) linked to urban traffic emissions; nucleation modes (3–20 nm) linked to photochemically induced particle formation; an aged nucleation mode (10–50 nm). Additional PCs represented only local sources at a single site, or infrequent phenomena. In summary, the analysis of size distributions of high time and size resolution yielded a surprising wealth of statistical aerosol components occurring in the urban atmosphere over one single city. A paradigm on the behaviour of sub-μm urban aerosol particles is proposed, with recommendations how to efficiently monitor individual sub-fractions across an entire city.
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Wex, H., M. D. Petters, C. M. Carrico, E. Hallbauer, A. Massling, G. R. McMeeking, L. Poulain, Z. Wu, S. M. Kreidenweis, and F. Stratmann. "Towards closing the gap between hygroscopic growth and activation for secondary organic aerosol: Part 1 – Evidence from measurements." Atmospheric Chemistry and Physics 9, no. 12 (June 18, 2009): 3987–97. http://dx.doi.org/10.5194/acp-9-3987-2009.
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Abstract. Secondary Organic Aerosols (SOA) studied in previous laboratory experiments generally showed only slight hygroscopic growth, but a much better activity as a CCN (Cloud Condensation Nucleus) than indicated by the hygroscopic growth. This discrepancy was examined at LACIS (Leipzig Aerosol Cloud Interaction Simulator), using a portable generator that produced SOA particles from the ozonolysis of α-pinene, and adding butanol or butanol and water vapor during some of the experiments. The light scattering signal of dry SOA-particles was measured by the LACIS optical particle spectrometer and was used to derive a refractive index for SOA of 1.45. LACIS also measured the hygroscopic growth of SOA particles up to 99.6% relative humidity (RH), and a CCN counter was used to measure the particle activation. SOA-particles were CCN active with critical diameters of e.g. 100 nm and 55 nm at super-saturations of 0.4% and 1.1%, respectively. But only slight hygroscopic growth with hygroscopic growth factors ≤1.05 was observed at RH<98% RH. At RH>98%, the hygroscopic growth increased stronger than would be expected if a constant hygroscopicity parameter for the particle/droplet solution was assumed. An increase of the hygroscopicity parameter by a factor of 4–6 was observed in the RH-range from below 90% to 99.6%, and this increase continued for increasingly diluted particle solutions for activating particles. This explains an observation already made in the past: that the relation between critical super-saturation and dry diameter for activation is steeper than what would be expected for a constant value of the hygroscopicity. Combining measurements of hygroscopic growth and activation, it was found that the surface tension that has to be assumed to interpret the measurements consistently is greater than 55 mN/m, possibly close to that of pure water, depending on the different SOA-types produced, and therefore only in part accounts for the discrepancy between hygroscopic growth and CCN activity observed for SOA particles in the past.