@book{ArwornDeneckePoeschel1998,
  author    = {Arworn, Srichan and Denecke, Klaus-Dieter and P{\"o}schel, Reinhard},
  title     = {Closure operators on complete lattices},
  series = {Preprint MATH-ALG / Technische Universit{\"a}t Dresden},
  volume    = {1998, 05},
  journal   = {Preprint MATH-ALG / Technische Universit{\"a}t Dresden},
  publisher = {Techn. Univ.},
  address   = {Dresden},
  year      = {1998},
  language  = {en}
}
@article{DeneckeKoppitz1998,
  author    = {Denecke, Klaus-Dieter and Koppitz, J{\"o}rg},
  title     = {Finite monoids of hypersubstitutions of type € = (2)},
  year      = {1998},
  language  = {en}
}
@article{DeneckeFreiberg1998,
  author    = {Denecke, Klaus-Dieter and Freiberg, L.},
  title     = {The word problem for M-solid varieties of semigroups},
  isbn      = {981-3083-86-7},
  year      = {1998},
  language  = {en}
}
@article{DeneckeKoppitzMarszalek1998,
  author    = {Denecke, Klaus-Dieter and Koppitz, J{\"o}rg and Marszalek, R.},
  title     = {Derived varieties and derived equational theories},
  year      = {1998},
  language  = {en}
}
@article{DeneckeKoppitz1998,
  author    = {Denecke, Klaus-Dieter and Koppitz, J{\"o}rg},
  title     = {M-solid monoids of hypersubstitutions of type 2},
  year      = {1998},
  language  = {en}
}
@article{Denecke1998,
  author    = {Denecke, Klaus-Dieter},
  title     = {Tame congruence theory},
  year      = {1998},
  language  = {en}
}
@article{Denecke1998,
  author    = {Denecke, Klaus-Dieter},
  title     = {Hyperequational Theorie},
  year      = {1998},
  language  = {de}
}
@phdthesis{Kehr1998,
  author    = {Kehr, Julia},
  title     = {Mikroanalyse einzelner Zellen und Kompartimente transgener Pflanzen mittels biophysikalischer Methoden},
  address   = {Potsdam},
  pages     = {VII, 102 S. : graph. Darst.},
  year      = {1998},
  language  = {de}
}
@article{LueckEisenreichBlumensteinetal.1998,
  author    = {L{\"u}ck, Erika and Eisenreich, Manfred and Blumenstein, Oswald and Domsch, Horst},
  title     = {Geophysikalische Untersuchungen zur Erfassung r{\"a}umlicher und zeitlicher Variationen von Bodenstrukturen},
  year      = {1998},
  language  = {de}
}
@article{DomschLueckEisenreich1998,
  author    = {Domsch, Horst and L{\"u}ck, Erika and Eisenreich, Manfred},
  title     = {Description o a soil structure by means of the penetration resistance and the electrical conductivity},
  year      = {1998},
  language  = {en}
}
@article{LueckEisenreich1998,
  author    = {L{\"u}ck, Erika and Eisenreich, Manfred},
  title     = {Die elektrische Leitf{\"a}higkeit als eine Steuergr{\"o}ße f{\"u}r die teilfl{\"a}chenspezifische Landwirtschaft},
  year      = {1998},
  language  = {de}
}
@article{LueckEisenreichWetzel1998,
  author    = {L{\"u}ck, Erika and Eisenreich, Manfred and Wetzel, G.},
  title     = {Geophysikalische Untersuchungen zur Erkundung der Kreisgrabenanlage bei Dyrotz (Brandenburg)},
  year      = {1998},
  language  = {de}
}
@article{LueckEisenreich1998,
  author    = {L{\"u}ck, Erika and Eisenreich, Manfred},
  title     = {Geophysical prospections of archaeological sites in Brandenburg},
  year      = {1998},
  language  = {en}
}
@article{Kotowski1998,
  author    = {Kotowski, Elke-Vera},
  title     = {"Nun ist auch dieser unselige Spuk weggewischt" - Theodor Lessing im Geiste seiner Zeitgenossen},
  year      = {1998},
  language  = {de}
}
@article{LueckEisenreichDomsch1998,
  author    = {L{\"u}ck, Erika and Eisenreich, Manfred and Domsch, Horst},
  title     = {Geophysikalische Kennwerte zur Kennzeichnung landwirtschaftlicher Fl{\"a}chen f{\"u}r die teilfl{\"a}chenspezifische Bewirtschaftung},
  year      = {1998},
  language  = {de}
}
@article{LueckEisenreichLochter1998,
  author    = {L{\"u}ck, Erika and Eisenreich, Manfred and Lochter, F.},
  title     = {Geophysikalische Erkundungen einer neolithischen Doppelkreigrabenanlage im Land Brandenburg},
  year      = {1998},
  language  = {de}
}
@article{HerbstKappKrummeletal.1998,
  author    = {Herbst, R. and Kapp, Ingo and Krummel, H. and L{\"u}ck, Erika},
  title     = {Seismic sources for shallow investigatons : a field comparison from Northern Germany},
  year      = {1998},
  language  = {en}
}
@phdthesis{Schwab1998,
  author    = {Schwab, Markus Julius},
  title     = {Rekonstruktion der sp{\"a}tquart{\"a}ren Klima- und Umweltgeschichte der Schirmacher Oase und des Wohlthat Massivs (Ostantarktika)},
  pages     = {128 S. : Ill.},
  year      = {1998},
  language  = {de}
}
@article{GebertKretzschmarRegenstein1998,
  author    = {Gebert, Horst and Kretzschmar, Wolfgang and Regenstein, Wolfgang},
  title     = {Ground-state complex formation of perylene with pyromellitic dianhydride studied by static fluorescence quenching},
  year      = {1998},
  language  = {en}
}
@article{RegensteinGebertKretzschmar1998,
  author    = {Regenstein, Wolfgang and Gebert, Horst and Kretzschmar, Wolfgang},
  title     = {Charge transfer interaction and static quenching},
  year      = {1998},
  language  = {en}
}
@article{KoesterkeDreizlerRauch1998,
  author    = {Koesterke, Lars and Dreizler, S. and Rauch, Thomas},
  title     = {On the mass-loss of PG 1159 stars},
  year      = {1998},
  language  = {en}
}
@book{OPUS4-22613,
  title     = {Potsdamer Textb{\"u}cher},
  editor    = {Crome, Erhard and Franzke, Jochen and Kr{\"a}mer, Raimund},
  publisher = {Berliner Debatte, Wiss.-Verl. [u.a.]},
  address   = {Berlin},
  year      = {1998},
  abstract  = {Die Potsdamer Textb{\"u}cher sind eine Buchreihe f{\"u}r Lernende und Lehrende an Hoch- und Fachschulen und f{\"u}r alle, die sich f{\"u}r internationale Politik und vergleichende Studien interessieren. Die bieten aktuelle Grundlagentexte, die f{\"u}r das jeweilige Thema als Beitr{\"a}ge zur Debatte zusammengestellt worden sind.},
  language  = {de}
}
@article{Crome1998,
  author    = {Crome, Erhard},
  title     = {Eine neue Außenpolitik Deutschlands?},
  year      = {1998},
  language  = {de}
}
@book{OPUS4-23124,
  title     = {DDR - Spuren und Bilder},
  editor    = {Crome, Erhard},
  year      = {1998},
  language  = {de}
}
@article{Diekmann1998,
  author    = {Diekmann, Irene},
  title     = {Der Beitrag von m{\"u}ndlichen Quellen f{\"u}r die Aufarbeitung von Lokalgeschichte : dargest. am Beispiel des Interviews mit Egon K. aus Rathenow},
  year      = {1998},
  language  = {de}
}
@article{Diekmann1998,
  author    = {Diekmann, Irene},
  title     = {Zur Geschichte der J{\"u}dischen Gemeinde},
  year      = {1998},
  language  = {de}
}
@book{OPUS4-22718,
  title     = {Wegweiser durch das j{\"u}dische Mecklenburg-Vorpommern},
  series = {Beitr{\"a}ge zur Geschichte und Kultur der Juden in Brandenburg, Mecklenburg-Vorpommern, Sachsen-Anhalt},
  volume    = {2},
  journal   = {Beitr{\"a}ge zur Geschichte und Kultur der Juden in Brandenburg, Mecklenburg-Vorpommern, Sachsen-Anhalt},
  editor    = {Diekmann, Irene},
  publisher = {Verl. f{\"u}r Berlin-Brandenburg},
  address   = {Potsdam},
  isbn      = {3-930850-77-x},
  pages     = {544 S. : Ill., graph. Darst.},
  year      = {1998},
  language  = {de}
}
@misc{StraussWeissWolframetal.1998,
  author    = {Strauß, Ekkehard and Weiß, Norman and Wolfram, Jens and Pieper, Hans-Gerd},
  title     = {MenschenRechtsMagazin : Informationen | Meinungen | Analysen},
  volume    = {3},
  number    = {3},
  issn      = {1434-2820},
  url       = {http://nbn-resolving.de/urn:nbn:de:kobv:517-opus-56699},
  year      = {1998},
  language  = {de}
}
@book{BakardjievaSowada1998,
  author    = {Bakardjieva, Radostina and Sowada, Christoph},
  title     = {Soziale Sicherung in Bulgarien 1991-1997 : Entwicklung - Stand - Perspektiven},
  url       = {http://nbn-resolving.de/urn:nbn:de:kobv:517-opus-48799},
  publisher      = {Universit{\"a}t Potsdam},
  year      = {1998},
  abstract  = {All countries of Central and Eastern Europe had to bear and are still bearing tremendous costs of the economic and political transformation. This paper deals with the case of Bulgaria. We describe the social situation and the most important social security institutions in Bulgaria (unemployment benefits, the pension system and family support) over the period of the last seven years.},
  language  = {de}
}
@book{Bednarski1998,
  author    = {Bednarski, Marek},
  title     = {Privatisation policy and industrial policy in Poland in the period of transformation},
  url       = {http://nbn-resolving.de/urn:nbn:de:kobv:517-opus-48812},
  publisher      = {Universit{\"a}t Potsdam},
  year      = {1998},
  abstract  = {The transformation of centrally planned economies needs privatisation and a co-ordinated industrial policy. This paper presents an overview of the legal basis, tools, and out-comes of privatisation and industrial policies in Poland in the nineties.},
  language  = {en}
}
@article{OPUS4-5295,
  title     = {Stichwort: Rassismusbek{\"a}mpfung},
  series = {MenschenRechtsMagazin : MRM ; Informationen, Meinungen, Analysen},
  volume    = {3},
  journal   = {MenschenRechtsMagazin : MRM ; Informationen, Meinungen, Analysen},
  number    = {3},
  issn      = {1434-2820},
  url       = {http://nbn-resolving.de/urn:nbn:de:kobv:517-opus-54988},
  pages     = {103 -- 105},
  year      = {1998},
  language  = {de}
}
@article{OPUS4-5296,
  title     = {Stichwort: Die Bretton Woods-Institutionen},
  series = {MenschenRechtsMagazin : MRM ; Informationen, Meinungen, Analysen},
  volume    = {4},
  journal   = {MenschenRechtsMagazin : MRM ; Informationen, Meinungen, Analysen},
  number    = {1},
  issn      = {1434-2820},
  url       = {http://nbn-resolving.de/urn:nbn:de:kobv:517-opus-54997},
  pages     = {23},
  year      = {1998},
  language  = {de}
}
@article{BerthDautzenbergPeter1998,
  author    = {Berth, Gisela and Dautzenberg, Herbert and Peter, Martin G.},
  title     = {Physica-chemical characterization of chitosans in dilute solution},
  isbn      = {2-907922-57-2},
  year      = {1998},
  language  = {en}
}
@misc{GessingerBernerBoehmetal.1998,
  author    = {Gessinger, Joachim and Berner, Elisabeth and B{\"o}hm, Manuela and Fischer, Christian and Schr{\"o}ter, Ullrich},
  title     = {Umgangssprache in Brandenburg},
  url       = {http://nbn-resolving.de/urn:nbn:de:kobv:517-0000933},
  year      = {1998},
  abstract  = {Untersuchungsgebiet ist das heutige Bundesland Brandenburg. In diesem Raum werden von alters her germanische und slawische, seit dem Mittelalter a uch niederdeutsche (= plattdeutsche) und hochdeutsche Mundarten gesprochen. Mit der Industrialisierung im 19. Jahrhundert breitete sich die Stadtsprache Berlins als Umgangssprache auch in Brandenburg aus und trat vielerorts an die Stelle der alten Mundarten (= Dialekte). Dieser Vorgang dauert bis heute an. Das Forschungsprojekt soll seinen Stand Mitte der 90er Jahre erfassen und so Material f{\"u}r Vergleiche mit {\"a}lteren und mit zuk{\"u}nftigen Erhebungen liefern. Untersuchungsmethode: Erhebung sprachlicher Daten und Ermittlung von Einstellungen zur Sprache mittels eines Fragebogens, der in einer Auflage von 8.000 St{\"u}ck {\"u}ber Schulen, Pfarr{\"a}mter, Heimatpfleger, freiwillige Helfer und Studierende der Universit{\"a}t Potsdam im ganzen Land Brandenburg verteilt wurde. Im Februar 1996 wurden zudem in ausgew{\"a}hlten Regionen insgesamt 20 Tonbandaufnahmen von Sprechern unterschiedlicher Mundarten und auch des Berlinischen als aktueller Umgangssprache aufgezeichnet. Erhebungszeitraum: Pilotstudie 1994, Erhebung 1995, Nacherhebung und Sprachaufnahmen 1996},
  language  = {de}
}
@book{OPUS4-681,
  title     = {Verhaltensbiologie und Naturschutz},
  number    = {3},
  editor    = {Wallschl{\"a}ger, Hans-Dieter and Freude, Matthias and K{\"o}hler, Dieter},
  issn      = {1611-9339},
  url       = {http://nbn-resolving.de/urn:nbn:de:kobv:517-opus-7874},
  publisher      = {Universit{\"a}t Potsdam},
  year      = {1998},
  abstract  = {SCHULZ, H. - J.: Interessante Stechimmen (Hymenoptera, Aculeata) des Nationalparkes "Unteres Odertal", insbesondere aus dem Criewener Teil ; SIEGMUND, R.: Chronobiologie und Verhalten bei Fischen (Pisces, Cyprinidae) ; WUNTKE, B.; LUDWIG, I.: Zur Nahrungswahl der Schleiereule (Tyto alba guttata) im Landkreis Potsdam-Mittelmark (Brandenburg) ; GEBAUER, A.; KAISER, M.: Anmerkungen zur Lautentwicklung und zum Stimmbruch beim Grauen Kranich (Grus grus) ; ROBEL, D.: Revier und Revierverhalten bei der Blauracke (Coracias garrulus) ; KNEIS, P.: Vorkommen und Schutz der Saatkr{\"a}he (Corvus frugilegus) im nords{\"a}chsischen Elbe-R{\"o}der-Gebiet um Riesa-Großenhain ; WALLSCHL{\"A}GER, D.: Was ist ein Goldammerdialekt? ; SCHEIBE, K.M.; LANGE, B.; SIELING, Ch.; SCHEIBE, A.; HEINZ, C.; GLADITZ, F.: Entwicklung von Ortspr{\"a}ferenzen bei Przewalskipferden und Heckrindern und ihr Einfluß auf Vegetationsstrukturen ; MENDE, W.; WERMKE, K.: Betrachtungen zur Rolle von Frequenzmodulationen in der sozialen Kommunikation bei Tier und Mensch ; WIPPER, R.: Ethologie und Umweltbildung ; K{\"O}HLER, D.: Zur Lautgebung einiger pal{\"a}arktischer Soriciden: Analyse von Abwehr- und Positionsrufen},
  language  = {de}
}
@book{OPUS4-680,
  title     = {Umweltforschung f{\"u}r das Land Brandenburg},
  number    = {2},
  editor    = {J{\"a}nkel, Ralph and Soyez, Konrad},
  issn      = {1611-9339},
  url       = {http://nbn-resolving.de/urn:nbn:de:kobv:517-opus-7869},
  publisher      = {Universit{\"a}t Potsdam},
  year      = {1998},
  abstract  = {Mit einer zusammenfassenden Darstellung der Arbeitsgruppen des ZfU der Universit{\"a}t Potsdam und des BUFZ e.V. (Alt Ruppin) sowie ihrer bearbeiteten Projekte: - Projekt Umweltplanung und -gestaltung: Nachhaltiges Brandenburg ; Nachhaltige, umweltgerechte Regionalentwicklung in Ostpriegnitz - Ruppin ; Entwicklung nachhaltiger Landnutzung ; Integrierte Umweltberatung und {\"o}kologische Zielsetzungen im Landkreis ; Fachinformationssystem Naturschutz und Landschaftspflege des LUA Brandenburg ; Umweltvertr{\"a}glichkeitspr{\"u}fung ; Planung und Projektierung der Abwasserentsorgung im Land Brandenburg - Projekt Umweltrecht, Umweltpolitik:Vollzug der Indirekteinleiterverordnung in industriellen Ballungsr{\"a}umen ; Brandenburger Abwassertage ; Landwirtschaftliche Kl{\"a}rschlammverwertung in Nordwest - Brandenburg ; {\"O}ko-Audit, Umweltmanagement - Projekt Umwelt und {\"O}konomie: Das Management {\"o}kologischer Risiken und Krisen: Verhaltenswissenschaftliche Grundlagen ; {\"O}kologieorientiertes Unternehmensverhalten bei klein- und mittelst{\"a}ndischen Unternehmen ; Anforderungen des Bodenschutzes an die stoffliche Verwertung von Bioabf{\"a}llen - Erarbeitung einer Handlungsempfehlung ; Entwicklung nachhaltiger Wirtschaftsweisen im l{\"a}ndlichen Bereich. Unterprojekt: Reduzierung pathogener Bakterienspezies f{\"u}r eine umweltgerechte Schadensbegrenzung - Projekt Soziologische und psychologische Probleme des Umgangs mit der Umwelt:Die Wahrnehmung und Bewertung von Umweltproblemen sowie Handlungspr{\"a}ferenzen zur Umweltvorsorge von Managern und Verwaltungsangestellten ; Consumer Attitudes and Decision Making with Regard to Genetically Engineered Food Products ; Umweltbewußtes Konsumentenverhalten ; Nachhaltige Lebensweisen als Ressource f{\"u}r die Schaffung neuer Besch{\"a}ftigungsfelder. Wissenschaftliche Untersuchung weicher Standortfaktoren bei der Erarbeitung und Umsetzung einer regionalen Agenda 21 in Ostpriegnitz - Ruppin ; Technikfolgenabsch{\"a}tzung - Optionen f{\"u}r nachhaltig zukunftsf{\"a}hige Technikgestaltung - Projekt Umweltbildung: Lernsoftware f{\"u}r die Umweltbildung: Groß{\"o}kosysteme der Erde ; Lernsoftware f{\"u}r die Umweltbildung: Kesselmoore in Brandenburg ; Lernsoftware f{\"u}r die Umweltbildung: D{\"o}beritzer Heide / Ferbitzer Bruch- Projekt Luftreinhaltung / Klima: Auswertung von multispektralen LIDAR-Meßdaten der Troposph{\"a}re (Stratosph{\"a}re) mit modernen mathematischen Standardverfahren f{\"u}r lineare zweidimensionale (eindimensionale) schlecht gestellte inverse Probleme zur Bestimmung von nicht gealterten Aerosol-Gr{\"o}ßenverteilungen- Projekt Wasser:Voruntersuchungen zu hydrogeochemischen und geophysikalischen Methoden der Neubemessung von Trinkwasserschutzzonen ; {\"A}nderung der Sickerwasserbeschaffenheit unter einer typischen Rieselfeldfl{\"a}che nach Einstellung der Abwasserbeaufschlagung ; Limnologische Charakterisierung des Lindenweihers in Falkensee / Finkenkrug ; Charakterisierung der Wasserqualit{\"a}t des Baggersees am Stern (Potsdam)- Projekt Boden:Rieselfelder Berlin-S{\"u}d: Altlasten, Grundwasser, Oberfl{\"a}chenwasser. Teilprojekt 1: Bodenkundliche Untersuchungen ; Rieselfelder Berlin-S{\"u}d: Multivalente Beurteilung der {\"o}kologischen Relevanz von Last- und Schadstoffen - Aufbau eines Bodeninformationssystems- Projekt Energie:Photovoltaikanlage ; Solarthermie- Projekt Stoffwirtschaft:Verbundvorhaben „Mechanisch-Biologische Behandlung von zu deponierenden Abf{\"a}llen"; TV1: Koordination des Verbundvorhabens und Ableitung von Entscheidungsgrundlagen ; Management des Stoffstromes Holz ; Verfahrensentwicklung zur Kopplung von Kompostierung und Gew{\"a}chshausproduktion - Demonstrationsanlage ; Verfahrensentwicklung zur Kopplung von Kompostierung und Gew{\"a}chshausproduktion - {\"O}kobilanzierung ; Nachhaltiges Stoffstrommanagement als Bestandteil von regionaltypischen Konzepten f{\"u}r eine nachhaltige zukunftsf{\"a}hige Entwicklung von Konversionsgebieten und strukturschwachen Regionen im Land Brandenburg ; Faserhanfanbau im Land Brandenburg ; Verbundvorhaben „Gr{\"u}ne Bioraffinerie Brandenburg"- Projekt Naturschutz:Grundlagen f{\"u}r Artenschutzprogramme in Brandenburg ; Konversion und Naturschutz ; Zur Belastung der Marginalbereiche des Kiefbruches in Folge der milit{\"a}rischen Nutzung der D{\"o}beritzer Heide ; Bl{\"u}ten{\"o}kologisches Monitoring auf ehemaligen Konversionsfl{\"a}chen ; Management von wandernden Wasservogelarten im Land Brandenburg, die Sch{\"a}den an landwirtschaftlichen Kulturen verursachen<Br>- Einrichtungen / Arbeitsgruppen},
  language  = {de}
}
@book{GabbertWeikard1998,
  author    = {Gabbert, Silke and Weikard, Hans-Peter},
  title     = {Food deficits, food security and food aid : concepts and measurement},
  url       = {http://nbn-resolving.de/urn:nbn:de:kobv:517-opus-8589},
  publisher      = {Universit{\"a}t Potsdam},
  year      = {1998},
  abstract  = {The concepts of food deficit, hunger, undernourishment and food security are discussed. Axioms and indices for the assessment of nutrition of individuals and groups are suggested. Furthermore a measure for food aid donor performance is developed and applied to a sample of bilateral and multilateral donors providing food aid for African countries.},
  language  = {en}
}
@book{Scholderer1998,
  author    = {Scholderer, Joachim},
  title     = {Risk communication strategies for genetically engineered food products},
  url       = {http://nbn-resolving.de/urn:nbn:de:kobv:517-opus-9268},
  publisher      = {Universit{\"a}t Potsdam},
  year      = {1998},
  abstract  = {Inhalt: Introduction: -Some Introductory Examples -Consumer-relevant Utility Dimensions -Communication Flow between the Relevant Actors -Risk Communication Dimensions -Complete Model -Aims of the Study Method: -Participants -Procedure -Content Analysis Results: -Sample Category 1: Food safety -Sample Category 2: Product Quality -Sample Category 3: Freedom of Choice -Sample Category 4: Decision Power over Foodstuffs -Strategy 1: Scientific Information Approach -Strategy 2: Balanced Information Approach -Strategy 3: Product Information Approach -Strategy 4: Classical Advertising -Strategy 5: Trust me I'm no Baddie -Strategy 6: Induction of Fear},
  language  = {en}
}
@book{Scholderer1998,
  author    = {Scholderer, Joachim},
  title     = {Gentechnik und Risikokommunikation},
  url       = {http://nbn-resolving.de/urn:nbn:de:kobv:517-opus-9271},
  publisher      = {Universit{\"a}t Potsdam},
  year      = {1998},
  abstract  = {Inhalt: Im diesem Vortrag geht es darum, wie Gentechnik von Experten kommuniziert wird und darum, ob diese Kommunikation bei den Verbrauchern ankommt. Enthalten sind zwei Studien: Studie 1: Nutzen, Risiko und Risikokommunikation. Die Sicht der europ{\"a}ischen Experten{\"o}ffentlichkeit -Nutzen- und Riskodimensionen gentechnisch ver{\"a}nderter Lebensmittel -Akteure in der {\"o}ffenlichen Auseinandersetzung -Risikokommunikation -Fragestellung -Methode -Ergebnisse -Wissensorientierte Strategien -Persuasive Strategien Studie 2: Konsumentenwahrnehmung gentechnisch ver{\"a}nderter Lebensmittel -Methode -Ergebnisse},
  language  = {de}
}
@book{Balderjahn1998,
  author    = {Balderjahn, Ingo},
  title     = {Grundgedanken und Beispiele zur Entwicklung von Leitbildern f{\"u}r St{\"a}dte},
  url       = {http://nbn-resolving.de/urn:nbn:de:kobv:517-opus-9283},
  publisher      = {Universit{\"a}t Potsdam},
  year      = {1998},
  abstract  = {Inhalt: Grundgedanken zur Entwicklung von Leitbildern -Leitbilder im Kontext eines Stadtmarketingkonzeptes -Ein Modell zur Entwicklung von Leitbildern -Das Leitbild als ein Element der Entwicklung eines Stadtmarketing- Konzepts -Funktion von Leitbildern -Anforderungen an Leitbilder Beispiele zur Leitbildentwicklung f{\"u}r die St{\"a}dte Hennigsdorf und Potsdam},
  language  = {en}
}
@unpublished{Korkey1998,
  author    = {Korkey, Michael Brian},
  title     = {Optimal factorization of Muckenhoupt weights},
  url       = {http://nbn-resolving.de/urn:nbn:de:kobv:517-opus-25266},
  year      = {1998},
  abstract  = {Peter Jones' theorem on the factorization of Ap weights is sharpened for weights with bounds near 1, allowing the factorization to be performed continuously near the limiting, unweighted case. When 1 < p < infinite and omega is an Ap weight with bound Ap(omega) = 1 + epsilon, it is shown that there exist Asub1 weights u, v such that both the formula omega = uv(1-p) and the estimates A1 (u), A1 (v) = 1 + Omikron (√epsilon) hold. The square root in these estimates is also proven to be the correct asymptotic power as epsilon -> 0.},
  language  = {en}
}
@unpublished{ChenHidetoshi1998,
  author    = {Chen, Hua and Hidetoshi, Tahara},
  title     = {On the holomorphic solution of non-linear totally characteristic equations},
  url       = {http://nbn-resolving.de/urn:nbn:de:kobv:517-opus-25333},
  year      = {1998},
  abstract  = {The paper deals with a non-linear singular partial differential equation: (E) t∂/∂t = F(t, x, u, ∂u/∂x) in the holomorphic category. When (E) is of Fuchsian type, the existence of the unique holomorphic solution was established by G{\´e}rard-Tahara [2]. In this paper, under the assumption that (E) is of totally characteristic type, the authors give a sufficient condition for (E) to have a unique holomorphic solution. The result is extended to higher order case.},
  language  = {en}
}
@misc{OPUS4-1793,
  title     = {VJS-Nachrichten : Informationsblatt der Vereinigung f{\"u}r j{\"u}dische Studien e.V.},
  number    = {2},
  organization    = {Vereinigung f{\"u}r j{\"u}dische Studien e.V.},
  issn      = {1437-2843},
  url       = {http://nbn-resolving.de/urn:nbn:de:kobv:517-opus-19880},
  year      = {1998},
  abstract  = {Inhalt: Leitartikel Kongreß f{\"u}r J{\"u}dische Studien - Sektion beim Deutschen Orientalistentag / Selbstkritik, Selbstverpflichtung oder Selbstzweck? / 16. DGfE-Kongreß, Der osteurop{\"a}ische Chassidismus - neuere Forschungen / Schließung der Israelwissenschaft in der Humboldt-Universit{\"a}t / Einf{\"u}hrung in das Fach J{\"u}dische Studien / Notizen / Aus der j{\"u}dischen Welt / Ver{\"o}ffentlichungen unserer Mitglieder / Verbandsnachrichten},
  language  = {de}
}
@unpublished{VolosevichMeister1998,
  author    = {Volosevich, Alexandra V. and Meister, Claudia-Veronika},
  title     = {Nonlinear interaction of Farley-Buneman waves},
  url       = {http://nbn-resolving.de/urn:nbn:de:kobv:517-opus-14851},
  year      = {1998},
  abstract  = {The nonlinear interaction of waves excited by the modified two-stream instability (Farley-Buneman instability) is considered. It is found that, during the linear stage of wave growth, the enhanced pressure of the high-frequency part of the waves locally generates a ponderomotive force. This force acts on the plasma particles and redistributes them. Thus an additional electrostatic polarization field occurs, which influences the low-frequency part of the waves. Then, the low-frequency waves also cause a redistribution of the high-frequency waves. In the paper, a self-consistent system of equations is obtained, which describes the nonlinear interaction of the waves. It is shown that the considered mechanism of wave interaction causes a nonlinear stabilization of the high-frequency waves' growth and a formation of local density structures of the charged particles. The density modifications of the charged particles during the non-linear stage of wave growth and the possible interval of aspect angles of the high-frequency waves are estimated.},
  language  = {en}
}
@unpublished{BraunFeudelGuzdar1998,
  author    = {Braun, Robert and Feudel, Fred and Guzdar, Parvez},
  title     = {The route to chaos for a two-dimensional externally driven flow},
  url       = {http://nbn-resolving.de/urn:nbn:de:kobv:517-opus-14717},
  year      = {1998},
  abstract  = {We have numerically studied the bifurcations and transition to chaos in a two-dimensional fluid for varying values of the Reynolds number. These investigations have been motivated by experiments in fluids, where an array of vortices was driven by an electromotive force. In these experiments, successive changes leading to a complex motion of the vortices, due to increased forcing, have been explored [Tabeling, Perrin, and Fauve, J. Fluid Mech. 213, 511 (1990)]. We model this experiment by means of two-dimensional Navier-Stokes equations with a special external forcing, driving a linear chain of eight counter-rotating vortices, imposing stress-free boundary conditions in the vertical direction and periodic boundary conditions in the horizontal direction. As the strength of the forcing or the Reynolds number is raised, the original stationary vortex array becomes unstable and a complex sequence of bifurcations is observed. Several steady states and periodic branches and a period doubling cascade appear on the route to chaos. For increasing values of the Reynolds number, shear flow develops, for which the spatial scale is large compared to the scale of the forcing. Furthermore, we have investigated the influence of the aspect ratio of the container as well as the effect of no-slip boundary conditions at the top and bottom, on the bifurcation scenario.},
  language  = {en}
}
@unpublished{Lukaschewitsch1998,
  author    = {Lukaschewitsch, Michael},
  title     = {Geoelectrical conductivity problems on unbounded domains},
  url       = {http://nbn-resolving.de/urn:nbn:de:kobv:517-opus-14704},
  year      = {1998},
  abstract  = {This paper deals with the electrical conductivity problem in geophysics. It is formulated as an elliptic boundary value problem of second order for a large class of bounded and unbounded domains. A special boundary condition, the so called "Complete Electrode Model", is used. Poincar{\´e} inequalities are formulated and proved in the context of weighted Sobolev spaces, leading to existence and uniqueness statements for the boundary value problem. In addition, a parameter-to-solution operator arising from the inverse conductivity problem in medicine (EIT) and geophysics is investigated mathematically and is shown to be smooth and analytic.},
  language  = {en}
}
@unpublished{BoeckmannNiebsch1998,
  author    = {B{\"o}ckmann, Christine and Niebsch, Jenny},
  title     = {Examination of the nonlinear LIDAR-operator : the influence of inhomogeneous absorbing spheres on the operator},
  url       = {http://nbn-resolving.de/urn:nbn:de:kobv:517-opus-14725},
  year      = {1998},
  abstract  = {The determination of the atmospheric aerosol size distribution is an inverse illposed problem. The shape and the material composition of the air-carried particles are two substantial model parameters. Present evaluation algorithms only used an approximation with spherical homogeneous particles. In this paper we propose a new numerically efficient recursive algorithm for inhomogeneous multilayered coated and absorbing particles. Numerical results of real existing particles show that the influence of the two parameters on the model is very important and therefore cannot be ignored.},
  language  = {en}
}
@unpublished{LiperovskyPochotelovLiperovskayaetal.1998,
  author    = {Liperovsky, V.A. and Pochotelov, O.A. and Liperovskaya, E.V. and Parrot, M. and Meister, C.-V. and Alimov, O. A.},
  title     = {Modifications of sporadic E-layers caused by seismic activity},
  url       = {http://nbn-resolving.de/urn:nbn:de:kobv:517-opus-14799},
  year      = {1998},
  abstract  = {Contents: 1 Introduction 2 Formation and destruction of sporadic E-layers 3 Temporal variations of parameters of sporadic E-layers during earthquake preparation 3.1 Temporal variations of fbEs with time-scales of a few hours 3.2 Study of fbEs variations with characteristic time-scales of 0.5-3 hours 3.3 Variations of the parameters of sporadic E-layers with characteristic time-scales of 15-45 minutes 3.4 Sporadic E-layer variations with characteristic time-scales of 2-15 minutes 4 On the spatial scales of sporadic E-layer disturbances related to seismic activity 5 Complex experimental researches of the ionosphere, electromagnetic noise and the geomagnetic field 5.1 Ionospheric and electromagnetic phenomena of the Kayraccum earthquake in 1985 5.2 Comparison of anomalies with characteristic time-scales of 2-3 hours for ionospheric E- and F-layers, and temporal behaviour of electromagnetic noise emission intensity 5.3 Night airglow emissions in the E-region before earthquakes and sporadic E-layer variations 6 Physical models of lithosphere-ionosphere links 6.1 Lithosphere-ionosphere links due to AGW 6.2 Electromagnetic models for the lithosphere-ionosphere coupling 6.3 Sporadic E-layers as current generators 7 Discussion and conclusion},
  language  = {en}
}
@unpublished{Dicken1998,
  author    = {Dicken, Volker},
  title     = {Simultaneous activity and attenuation reconstruction in emission tomography},
  url       = {http://nbn-resolving.de/urn:nbn:de:kobv:517-opus-14747},
  year      = {1998},
  abstract  = {In single photon emission computed tomography (SPECT) one is interested in reconstructing the activity distribution f of some radiopharmaceutical. The data gathered suffer from attenuation due to the tissue density µ. Each imaged slice incorporates noisy sample values of the nonlinear attenuated Radon transform (formular at this place in the original abstract) Traditional theory for SPECT reconstruction treats µ as a known parameter. In practical applications, however, µ is not known, but either crudely estimated, determined in costly additional measurements or plainly neglected. We demonstrate that an approximation of both f and µ from SPECT data alone is feasible, leading to quantitatively more accurate SPECT images. The result is based on nonlinear Tikhonov regularization techniques for parameter estimation problems in differential equations combined with Gauss-Newton-CG minimization.},
  language  = {en}
}
@unpublished{MaassPereverzevRamlauetal.1998,
  author    = {Maaß, Peter and Pereverzev, Sergei V. and Ramlau, Ronny and Solodky, Sergei G.},
  title     = {An adaptive discretization for Tikhonov-Phillips regularization with a posteriori parameter selection},
  url       = {http://nbn-resolving.de/urn:nbn:de:kobv:517-opus-14739},
  year      = {1998},
  abstract  = {The aim of this paper is to describe an efficient strategy for descritizing ill-posed linear operator equations of the first kind: we consider Tikhonov-Phillips-regularization χ^δ α = (a * a + α I)^-1 A * y ^δ with a finite dimensional approximation A n instead of A. We propose a sparse matrix structure which still leads to optimal convergences rates but requires substantially less scalar products for computing A n compared with standard methods.},
  language  = {en}
}