Advanced search in
Research products
arrow_drop_down
Searching FieldsTerms
Any field
arrow_drop_down
includes
arrow_drop_down
Include:
11,786 Research products, page 1 of 1,179

  • Publications
  • Other research products
  • Article
  • edoc-Server. Open-Access-Publikationsserver der Humboldt-Universität zu Berlin

10
arrow_drop_down
Relevance
arrow_drop_down
  • Publication . Article . 2015
    Open Access Danish
    Authors: 
    Christensen, Erik M.;
    Publisher: Humboldt-Universität zu Berlin, Philosophische Fakultät II, Nordeuropa-Institut
    Country: Germany
  • Open Access
    Authors: 
    J. J. Out; Mark E. Vierhout; F. Verhage; H. J. Duivenvoorden; Henk C.S. Wallenburg;
    Publisher: Walter de Gruyter GmbH
    Country: Germany

    Several authors have stated that induction of labor may have deleterious psychological effects on women's experiences of labor and early mother-infant interaction. Research on this subject is scarce and in most cases no distinction is made between elective induction and induction for medical reasons. For that reason the observed effects may also have been caused by the medical complications that led to the induction. Differences in experience of labor may also be in part explained by differences in personal characteristics between women choosing or rejecting induction of labor. Influences of induction of labor can only be reliably assessed in prospective studies. In the present study of 271 women with an uncomplicated pregnancy, data regarding their experiences of pregnancy and their expectations of labor and motherhood were collected before labor. In 72 women labor was electively induced, and 199 women had a spontaneous onset of labor. Of 33 women, 19 with spontaneous labor and 14 with elective induction, the first contact with their newborn was observed. All women who could be contacted were interviewed about their experience of labor and the first contact with their infant. Six months after delivery the mothers were questioned about the state of health of mother and infant and about nursing the infant. Mothers with induced labor were rated as being generally less emotionally involved in the first contact with their newborn than mothers with spontaneous labor, but the differences were not significant (Fig. 1). The duration of spontaneous labor was longer, but the subjective time experience did not differ between groups. Women with spontaneous labor were more tired during labor.(ABSTRACT TRUNCATED AT 250 WORDS)

  • Open Access English
    Authors: 
    Katrin Daedlow; Nahleen Lemke; Katharina Helming;
    Publisher: Multidisciplinary Digital Publishing Institute
    Country: Germany

    Soils are under increasing utilization pressure, and soil governance is an important element to maintain soil functions and prevent the degradation of soil quality. However, scientific studies about soil governance are rare. In this paper, we focus on the governance mechanism of land rent. Here, a major theoretical assumption is that landowners have higher incentives to maintain soil quality than leaseholders. By using data for German arable land at the county level, we contrast theoretical assumptions about the relationships between landowners, leaseholders and soil quality with empirical evidence based on correlations between arable land rent prices, rent proportions and yield potential. The main finding is that the empirical data contradict the theoretical assumptions to a large degree, i.e., no clear relationship could be discerned between the three parameters of arable land soil quality, rent price and rent proportion. We discuss possible explanations for the revealed contradictions based on the state of research and highlight the need for future research to better understand the potential of arable land tenancy as a governance mechanism for sustainable soil management.

  • Open Access German
    Authors: 
    Otto, Karl-Heinz; Mönter, Leif O.; Hof, Sandra; Wirth, Joachim;
    Publisher: Humboldt-Universität zu Berlin
    Country: Germany

    Geography teaching introduces the specific thought and work methods of geography and other earth sciences into school. Experimenting as the decisive way of gaining scientific knowledge plays a key role when dealing with physiogeographically relevant topics. The requirements as regards content and methods imposed on students experimenting in geography lessons are varied and demanding. However, no competence-oriented empirical studies on geographic experiments have been published so far. It is the aim of this contribution to summarize the national and international state of research concerning the empirical teaching and learning research on experimenting. It is thereby intended to discuss empirically verified theory models that exist against the background of the technical characteristics of the geographic experiment with regard to their suitability for a research project in the field of geography education. Peer Reviewed

  • Publication . Article . 2000
    Open Access German
    Authors: 
    Pirr, Uwe;
    Publisher: Humboldt-Universität zu Berlin
    Country: Germany
  • Open Access English
    Authors: 
    The ENROPE Group;
    Publisher: Humboldt-Universität zu Berlin
    Country: Germany

    The members of the European project ENROPE (European Network for Junior Researchers in the Field of Plurilingualism and Education) give a short insight into their conceptual design based on three intellectual outputs – Online Platform, E-Portfolio, and Qualification Handbook – and report briefly about to date realised and further planned activities to strengthen plurilingual practices in research on education. Die Mitglieder des europäischen Projekts ENROPE (European Network for Junior Researchers in the Field of Plurilingualism and Education) geben einen kurzen Einblick in ihr konzeptuelles Design, basierend auf drei intellektuellen Produkten - einer Online-Plattform, einem E-Portfolio und einem Qualifikationshandbuch - und berichten kurz schon realisierte und weitere geplante Aktivitäten, um mehrsprachige Praktiken in Forschung und Bildung zu stärken. Peer Reviewed

  • Publication . Article . 2016
    Open Access German
    Authors: 
    Perler, Dominik;
    Publisher: Humboldt-Universität zu Berlin
    Country: Germany

    Leibniz holds that we cannot give an account of the synchronic and diachronic identity of a person without appealing to a substance. This paper analyses his reasons for this anti-Lockean thesis. It first looks at his theory of substance, paying particular attention to his commitment to the Principle of Sufficient Reason: the existence of a well-ordered series of mental states cannot be sufficiently explained without reference to a substance. The paper then examines the distinction Leibniz draws between the substance as the “real person” and the “appearing person” that comes into existence through reflexive consciousness. It argues that there can be no appearing person without a real person and looks at the relationship between these two types of person. Leibniz’s distinction is still relevant because it shows that questions concerning the metaphysical constitution of a person need to be carefully distinguished from questions concerning the psychological construction of a personality. Peer Reviewed

  • Open Access
    Authors: 
    Birgit Heim; Simeon Lisovski; Mareike Wieczorek; Anne Morgenstern; Bennet Juhls; Iuliia Shevtsova; Stefan Kruse; Julia Boike; Irina Fedorova; Ulrike Herzschuh;
    Publisher: Humboldt-Universität zu Berlin
    Country: Germany

    Abstract The Lena Delta in Siberia is the largest delta in the Arctic and as a snow-dominated ecosystem particularly vulnerable to climate change. Using the two decades of MODerate resolution Imaging Spectroradiometer satellite acquisitions, this study investigates interannual and spatial variability of snow-cover duration and summer vegetation vitality in the Lena Delta. We approximated snow by the application of the normalized difference snow index and vegetation greenness by the normalized difference vegetation index (NDVI). We consolidated the analyses by integrating reanalysis products on air temperature from 2001 to 2021, and air temperature, ground temperature, and the date of snow-melt from time-lapse camera (TLC) observations from the Samoylov observatory located in the central delta. We extracted spring snow-cover duration determined by a latitudinal gradient. The ‘regular year’ snow-melt is transgressing from mid-May to late May within a time window of 10 days across the delta. We calculated yearly deviations per grid cell for two defined regions, one for the delta, and one focusing on the central delta. We identified an ensemble of early snow-melt years from 2012 to 2014, with snow-melt already starting in early May, and two late snow-melt years in 2004 and 2017, with snow-melt starting in June. In the times of TLC recording, the years of early and late snow-melt were confirmed. In the three summers after early snow-melt, summer vegetation greenness showed neither positive nor negative deviations. Whereas, vegetation greenness was reduced in 2004 after late snow-melt together with the lowest June monthly air temperature of the time series record. Since 2005, vegetation greenness is rising, with maxima in 2018 and 2021. The NDVI rise since 2018 is preceded by up to 4 °C warmer than average June air temperature. The ongoing operation of satellite missions allows to monitor a wide range of land surface properties and processes that will provide urgently needed data in times when logistical challenges lead to data gaps in land-based observations in the rapidly changing Arctic.

  • Open Access
    Authors: 
    S Golder; V Lopez; H Keller;
    Publisher: Kooperation de Gruyter
    Country: Germany

    Peer Reviewed

  • Open Access
    Authors: 
    Andrea Schmiedgen; Martin Komainda; Katja Kowalski; Patrick Hostert; Bettina Tonn; Manfred Kayser; Johannes Isselstein;
    Publisher: Wiley
    Country: Germany

    In agricultural grassland, high herbage utilisation efficiency (HEFF), which is the proportion of gross live-green herbage production that is utilised before entering senescence, is ensured by frequent defoliation. The decision upon which defoliation frequency to apply depends on the farming intensity. Assuming a reduced total herbage accumulation near trees in silvopastoral systems, frequent defoliations with high HEFF become less worthwhile—at least in specific spatial configurations. This makes an extensive management near trees an interesting option because it promotes other grassland-related ecosystem services such as biodiversity. The present study first analysed the interaction between defoliation frequency and position to trees on the total, dead and live herbage accumulation and the HEFF at two silvopastoral sites with short-rotation coppices in Germany. In addition, the total grassland–tree interface in Germany was assessed from land use and land cover maps of Germany based on satellite data to approximate the potential of grassland extensification near trees. The total herbage accumulation near trees declined by up to 41% but the HEFF was not affected by the position. Consequently, any intensification is not paid-off by adequate productivity and herbage quality in terms of HEFF and tree-related losses in herbage accumulation are expected up to a distance of 4.5–6 m. Applying a 4.5 m border on satellite data, we found that up to 4.4% (approximately 2200 km2) of the total grassland area in Germany is at a tree interface and potentially suitable for extensification. These findings indicate substantial potential for biodiversity conservation in grasslands with low trade-off for high-quality yield. Bundesministerium für Bildung und Forschung http://dx.doi.org/10.13039/501100002347 Peer Reviewed

Advanced search in
Research products
arrow_drop_down
Searching FieldsTerms
Any field
arrow_drop_down
includes
arrow_drop_down
Include:
11,786 Research products, page 1 of 1,179
  • Publication . Article . 2015
    Open Access Danish
    Authors: 
    Christensen, Erik M.;
    Publisher: Humboldt-Universität zu Berlin, Philosophische Fakultät II, Nordeuropa-Institut
    Country: Germany
  • Open Access
    Authors: 
    J. J. Out; Mark E. Vierhout; F. Verhage; H. J. Duivenvoorden; Henk C.S. Wallenburg;
    Publisher: Walter de Gruyter GmbH
    Country: Germany

    Several authors have stated that induction of labor may have deleterious psychological effects on women's experiences of labor and early mother-infant interaction. Research on this subject is scarce and in most cases no distinction is made between elective induction and induction for medical reasons. For that reason the observed effects may also have been caused by the medical complications that led to the induction. Differences in experience of labor may also be in part explained by differences in personal characteristics between women choosing or rejecting induction of labor. Influences of induction of labor can only be reliably assessed in prospective studies. In the present study of 271 women with an uncomplicated pregnancy, data regarding their experiences of pregnancy and their expectations of labor and motherhood were collected before labor. In 72 women labor was electively induced, and 199 women had a spontaneous onset of labor. Of 33 women, 19 with spontaneous labor and 14 with elective induction, the first contact with their newborn was observed. All women who could be contacted were interviewed about their experience of labor and the first contact with their infant. Six months after delivery the mothers were questioned about the state of health of mother and infant and about nursing the infant. Mothers with induced labor were rated as being generally less emotionally involved in the first contact with their newborn than mothers with spontaneous labor, but the differences were not significant (Fig. 1). The duration of spontaneous labor was longer, but the subjective time experience did not differ between groups. Women with spontaneous labor were more tired during labor.(ABSTRACT TRUNCATED AT 250 WORDS)

  • Open Access English
    Authors: 
    Katrin Daedlow; Nahleen Lemke; Katharina Helming;
    Publisher: Multidisciplinary Digital Publishing Institute
    Country: Germany

    Soils are under increasing utilization pressure, and soil governance is an important element to maintain soil functions and prevent the degradation of soil quality. However, scientific studies about soil governance are rare. In this paper, we focus on the governance mechanism of land rent. Here, a major theoretical assumption is that landowners have higher incentives to maintain soil quality than leaseholders. By using data for German arable land at the county level, we contrast theoretical assumptions about the relationships between landowners, leaseholders and soil quality with empirical evidence based on correlations between arable land rent prices, rent proportions and yield potential. The main finding is that the empirical data contradict the theoretical assumptions to a large degree, i.e., no clear relationship could be discerned between the three parameters of arable land soil quality, rent price and rent proportion. We discuss possible explanations for the revealed contradictions based on the state of research and highlight the need for future research to better understand the potential of arable land tenancy as a governance mechanism for sustainable soil management.

  • Open Access German
    Authors: 
    Otto, Karl-Heinz; Mönter, Leif O.; Hof, Sandra; Wirth, Joachim;
    Publisher: Humboldt-Universität zu Berlin
    Country: Germany

    Geography teaching introduces the specific thought and work methods of geography and other earth sciences into school. Experimenting as the decisive way of gaining scientific knowledge plays a key role when dealing with physiogeographically relevant topics. The requirements as regards content and methods imposed on students experimenting in geography lessons are varied and demanding. However, no competence-oriented empirical studies on geographic experiments have been published so far. It is the aim of this contribution to summarize the national and international state of research concerning the empirical teaching and learning research on experimenting. It is thereby intended to discuss empirically verified theory models that exist against the background of the technical characteristics of the geographic experiment with regard to their suitability for a research project in the field of geography education. Peer Reviewed

  • Publication . Article . 2000
    Open Access German
    Authors: 
    Pirr, Uwe;
    Publisher: Humboldt-Universität zu Berlin
    Country: Germany
  • Open Access English
    Authors: 
    The ENROPE Group;
    Publisher: Humboldt-Universität zu Berlin
    Country: Germany

    The members of the European project ENROPE (European Network for Junior Researchers in the Field of Plurilingualism and Education) give a short insight into their conceptual design based on three intellectual outputs – Online Platform, E-Portfolio, and Qualification Handbook – and report briefly about to date realised and further planned activities to strengthen plurilingual practices in research on education. Die Mitglieder des europäischen Projekts ENROPE (European Network for Junior Researchers in the Field of Plurilingualism and Education) geben einen kurzen Einblick in ihr konzeptuelles Design, basierend auf drei intellektuellen Produkten - einer Online-Plattform, einem E-Portfolio und einem Qualifikationshandbuch - und berichten kurz schon realisierte und weitere geplante Aktivitäten, um mehrsprachige Praktiken in Forschung und Bildung zu stärken. Peer Reviewed

  • Publication . Article . 2016
    Open Access German
    Authors: 
    Perler, Dominik;
    Publisher: Humboldt-Universität zu Berlin
    Country: Germany

    Leibniz holds that we cannot give an account of the synchronic and diachronic identity of a person without appealing to a substance. This paper analyses his reasons for this anti-Lockean thesis. It first looks at his theory of substance, paying particular attention to his commitment to the Principle of Sufficient Reason: the existence of a well-ordered series of mental states cannot be sufficiently explained without reference to a substance. The paper then examines the distinction Leibniz draws between the substance as the “real person” and the “appearing person” that comes into existence through reflexive consciousness. It argues that there can be no appearing person without a real person and looks at the relationship between these two types of person. Leibniz’s distinction is still relevant because it shows that questions concerning the metaphysical constitution of a person need to be carefully distinguished from questions concerning the psychological construction of a personality. Peer Reviewed

  • Open Access
    Authors: 
    Birgit Heim; Simeon Lisovski; Mareike Wieczorek; Anne Morgenstern; Bennet Juhls; Iuliia Shevtsova; Stefan Kruse; Julia Boike; Irina Fedorova; Ulrike Herzschuh;
    Publisher: Humboldt-Universität zu Berlin
    Country: Germany

    Abstract The Lena Delta in Siberia is the largest delta in the Arctic and as a snow-dominated ecosystem particularly vulnerable to climate change. Using the two decades of MODerate resolution Imaging Spectroradiometer satellite acquisitions, this study investigates interannual and spatial variability of snow-cover duration and summer vegetation vitality in the Lena Delta. We approximated snow by the application of the normalized difference snow index and vegetation greenness by the normalized difference vegetation index (NDVI). We consolidated the analyses by integrating reanalysis products on air temperature from 2001 to 2021, and air temperature, ground temperature, and the date of snow-melt from time-lapse camera (TLC) observations from the Samoylov observatory located in the central delta. We extracted spring snow-cover duration determined by a latitudinal gradient. The ‘regular year’ snow-melt is transgressing from mid-May to late May within a time window of 10 days across the delta. We calculated yearly deviations per grid cell for two defined regions, one for the delta, and one focusing on the central delta. We identified an ensemble of early snow-melt years from 2012 to 2014, with snow-melt already starting in early May, and two late snow-melt years in 2004 and 2017, with snow-melt starting in June. In the times of TLC recording, the years of early and late snow-melt were confirmed. In the three summers after early snow-melt, summer vegetation greenness showed neither positive nor negative deviations. Whereas, vegetation greenness was reduced in 2004 after late snow-melt together with the lowest June monthly air temperature of the time series record. Since 2005, vegetation greenness is rising, with maxima in 2018 and 2021. The NDVI rise since 2018 is preceded by up to 4 °C warmer than average June air temperature. The ongoing operation of satellite missions allows to monitor a wide range of land surface properties and processes that will provide urgently needed data in times when logistical challenges lead to data gaps in land-based observations in the rapidly changing Arctic.

  • Open Access
    Authors: 
    S Golder; V Lopez; H Keller;
    Publisher: Kooperation de Gruyter
    Country: Germany

    Peer Reviewed

  • Open Access
    Authors: 
    Andrea Schmiedgen; Martin Komainda; Katja Kowalski; Patrick Hostert; Bettina Tonn; Manfred Kayser; Johannes Isselstein;
    Publisher: Wiley
    Country: Germany

    In agricultural grassland, high herbage utilisation efficiency (HEFF), which is the proportion of gross live-green herbage production that is utilised before entering senescence, is ensured by frequent defoliation. The decision upon which defoliation frequency to apply depends on the farming intensity. Assuming a reduced total herbage accumulation near trees in silvopastoral systems, frequent defoliations with high HEFF become less worthwhile—at least in specific spatial configurations. This makes an extensive management near trees an interesting option because it promotes other grassland-related ecosystem services such as biodiversity. The present study first analysed the interaction between defoliation frequency and position to trees on the total, dead and live herbage accumulation and the HEFF at two silvopastoral sites with short-rotation coppices in Germany. In addition, the total grassland–tree interface in Germany was assessed from land use and land cover maps of Germany based on satellite data to approximate the potential of grassland extensification near trees. The total herbage accumulation near trees declined by up to 41% but the HEFF was not affected by the position. Consequently, any intensification is not paid-off by adequate productivity and herbage quality in terms of HEFF and tree-related losses in herbage accumulation are expected up to a distance of 4.5–6 m. Applying a 4.5 m border on satellite data, we found that up to 4.4% (approximately 2200 km2) of the total grassland area in Germany is at a tree interface and potentially suitable for extensification. These findings indicate substantial potential for biodiversity conservation in grasslands with low trade-off for high-quality yield. Bundesministerium für Bildung und Forschung http://dx.doi.org/10.13039/501100002347 Peer Reviewed

Send a message
How can we help?
We usually respond in a few hours.