Miscanthus×giganteus may play an important role in replacing fossil energy resources by bio-based alternatives.One further advantage of miscanthus production is the generally high soil organic carbon(C_(org))enri...Miscanthus×giganteus may play an important role in replacing fossil energy resources by bio-based alternatives.One further advantage of miscanthus production is the generally high soil organic carbon(C_(org))enrichment in soils.Due to declining yields,miscanthus stocks are commonly reintegrated into crop rotation after approximately 20 years.Currently there is only few information,whether these high amounts of(C_(org))can be conserved while intensifying soil tillage and crop management after reintegration.Therefore,we monitored(C_(org))stocks in a control with more than 20 years of continuous miscanthus and in a treatment with reintegration of a 20-years old miscanthus stock into an organic crop rotation.Based onδ^(13)C soil values,we calculated an annual(C_(org))enrichment of 0.98 Mg·ha^(-1)·yr^(-1)C under miscanthus.More than 95%of the miscanthus-C was determined in the upper 0.25 m of soil.Continuing miscanthus cultivation did not affect yields during the first five extension years and(C_(org))stocks increased further.Following reintegration,(C_(org))stocks remained constant during five years,which was mainly attributed to the humification and/or stabilization of high amounts of destroyed roots and rhizomes.A significant decrease in(C_(org))(-5.7 Mg·ha^(-1)C)compared to the continuing miscanthus cultivation was at first measured six years after reintegration into crop rotation,underlining the need of long-term investigations.Our data also show,that miscanthus production cycles can be extended in our region,and that sowing of the alfalfa grass mixture after rhizome/root destruction was efficient in preserving(C_(org))stocks for at least first five years after reintegration.展开更多
Background:Forests perform various important ecosystem functions that contribute to ecosystem services.In many parts of the world,forest management has shifted from a focus on timber production to multi-purpose forest...Background:Forests perform various important ecosystem functions that contribute to ecosystem services.In many parts of the world,forest management has shifted from a focus on timber production to multi-purpose forestry,combining timber production with the supply of other forest ecosystem services.However,it is unclear which forest types provide which ecosystem services and to what extent forests primarily managed for timber already supply multiple ecosystem services.Based on a comprehensive dataset collected across 150 forest plots in three regions differing in management intensity and species composition,we develop models to predict the potential supply of 13 ecosystem services.We use those models to assess the level of multifunctionality of managed forests at the national level using national forest inventory data.Results:Looking at the potential supply of ecosystem services,we found trade-offs(e.g.between both bark beetle control or dung decomposition and both productivity or soil carbon stocks)as well as synergies(e.g.for temperature regulation,carbon storage and culturally interesting plants)across the 53 most dominant forest types in Germany.No single forest type provided all ecosystem services equally.Some ecosystem services showed comparable levels across forest types(e.g.decomposition or richness of saprotrophs),while others varied strongly,depending on forest structural attributes(e.g.phosphorous availability or cover of edible plants)or tree species composition(e.g.potential nitrification activity).Variability in potential supply of ecosystem services was only to a lesser extent driven by environmental conditions.However,the geographic variation in ecosystem function supply across Germany was closely linked with the distribution of main tree species.Conclusions:Our results show that forest multifunctionality is limited to subsets of ecosystem services.The importance of tree species composition highlights that a lack of multifunctionality at the stand level can be compensated by managing forests at the展开更多
Temporal variations of atmospheric density distribution induce changes in the gravitational air mass attraction at a specific observation site. Additionally, the load of the atmospheric masses deforms the Earth’s cru...Temporal variations of atmospheric density distribution induce changes in the gravitational air mass attraction at a specific observation site. Additionally, the load of the atmospheric masses deforms the Earth’s crust and the sea surface. Variations in the local gravity acceleration and atmospheric pressure are known to be corrected with an admittance of about 3 nm/s2 per hPa as a standard factor, which is in accordance with the IAG Resolution No. 9, 1983. A more accurate admittance factor for a gravity station is varying with time and depends on the total global mass distribution within the atmosphere. The Institut für Erdmessung (IfE) performed absolute gravity observations in the Fennoscandian land uplift area nearly every year from 2003 to 2008. The objective is to ensure a reduction with 3 nm/s2 accuracy. Therefore, atmospheric gravity changes are modeled using globally distributed ECMWF data. The attraction effect from the local zone around the gravity station is calculated with ECMWF 3D weather data describing different pressure levels up to a height of 50 km. To model the regional and global attraction, and all deformation components the Green’s functions method and surface ECMWF 2D weather data are used. For the annually performed absolute gravimetry determinations, this approach improved the reductions by 8 nm/s2 (-19 nm/s2 to +4 nm/s2). The gravity modeling was verified using superconducting gravimeter data at station Membach inBelgiumimproving the residuals by about 15%.展开更多
Results of several studies point to an increase in reported child sexual abuse offences in Germany and an even higher number of undetected cases are assumed. In addition, even more cases regarding the distribution of ...Results of several studies point to an increase in reported child sexual abuse offences in Germany and an even higher number of undetected cases are assumed. In addition, even more cases regarding the distribution of child pornography have been reported. On behalf of victims of child sexual abuse and for the general public, a preventive treatment approach for people with a sexual interest in children is of prime importance. Currently, there is no published, evaluated therapeutic approach for treating potential offenders, dark field offenders and bright field offenders with a sexual interest in children in an outpatient setting. We designed a cognitive-behavioral therapeutic approach that integrated need- and resource-oriented concepts for the specific treatment of those people. This treatment program comprises thirteen modules and is established for a period of about one and a half years. The therapy concept is presented in detail and we report experiences with two male clients. We found a reduction of child abusive behavior (on- and off-line), cognitive distortions and subjective psychological distress, an increase of the extent of self-perceived sexual self-regulation, life satisfaction and self-efficacy in general and a high level of clients’ satisfaction with the therapy concept. The present therapy concept shows promising results as a potential viable treatment program to protect children by reaching out to people with a self-reported sexual interest in children in an outpatient setting, but further research is necessary.展开更多
We give a lower bound of the Loewy length of the projective cover of the trivial module for the group algebra kG of a finite group G of Lie type defined over a finite field of odd characteristic p, where k is an arbit...We give a lower bound of the Loewy length of the projective cover of the trivial module for the group algebra kG of a finite group G of Lie type defined over a finite field of odd characteristic p, where k is an arbitrary field of characteristic p. The proof uses Auslander-Reiten theory.展开更多
文摘Miscanthus×giganteus may play an important role in replacing fossil energy resources by bio-based alternatives.One further advantage of miscanthus production is the generally high soil organic carbon(C_(org))enrichment in soils.Due to declining yields,miscanthus stocks are commonly reintegrated into crop rotation after approximately 20 years.Currently there is only few information,whether these high amounts of(C_(org))can be conserved while intensifying soil tillage and crop management after reintegration.Therefore,we monitored(C_(org))stocks in a control with more than 20 years of continuous miscanthus and in a treatment with reintegration of a 20-years old miscanthus stock into an organic crop rotation.Based onδ^(13)C soil values,we calculated an annual(C_(org))enrichment of 0.98 Mg·ha^(-1)·yr^(-1)C under miscanthus.More than 95%of the miscanthus-C was determined in the upper 0.25 m of soil.Continuing miscanthus cultivation did not affect yields during the first five extension years and(C_(org))stocks increased further.Following reintegration,(C_(org))stocks remained constant during five years,which was mainly attributed to the humification and/or stabilization of high amounts of destroyed roots and rhizomes.A significant decrease in(C_(org))(-5.7 Mg·ha^(-1)C)compared to the continuing miscanthus cultivation was at first measured six years after reintegration into crop rotation,underlining the need of long-term investigations.Our data also show,that miscanthus production cycles can be extended in our region,and that sowing of the alfalfa grass mixture after rhizome/root destruction was efficient in preserving(C_(org))stocks for at least first five years after reintegration.
基金funded through the project‘Bio Holz’(grant no.01LC1323A)in the funding program‘Research for the Implementation of the National Biodiversity Strategy(F&U NBS)’by the German Federal Ministry for Education and Research(BMBF)and the German Federal Agency for Nature Conservation(Bf N)with funds provided by the German Federal Ministry for the Environment,Nature Conservation,Building and Nuclear Safety(BMUB)supported by the DFG Priority Program 1374‘Infrastructure-Biodiversity-Exploratories’。
文摘Background:Forests perform various important ecosystem functions that contribute to ecosystem services.In many parts of the world,forest management has shifted from a focus on timber production to multi-purpose forestry,combining timber production with the supply of other forest ecosystem services.However,it is unclear which forest types provide which ecosystem services and to what extent forests primarily managed for timber already supply multiple ecosystem services.Based on a comprehensive dataset collected across 150 forest plots in three regions differing in management intensity and species composition,we develop models to predict the potential supply of 13 ecosystem services.We use those models to assess the level of multifunctionality of managed forests at the national level using national forest inventory data.Results:Looking at the potential supply of ecosystem services,we found trade-offs(e.g.between both bark beetle control or dung decomposition and both productivity or soil carbon stocks)as well as synergies(e.g.for temperature regulation,carbon storage and culturally interesting plants)across the 53 most dominant forest types in Germany.No single forest type provided all ecosystem services equally.Some ecosystem services showed comparable levels across forest types(e.g.decomposition or richness of saprotrophs),while others varied strongly,depending on forest structural attributes(e.g.phosphorous availability or cover of edible plants)or tree species composition(e.g.potential nitrification activity).Variability in potential supply of ecosystem services was only to a lesser extent driven by environmental conditions.However,the geographic variation in ecosystem function supply across Germany was closely linked with the distribution of main tree species.Conclusions:Our results show that forest multifunctionality is limited to subsets of ecosystem services.The importance of tree species composition highlights that a lack of multifunctionality at the stand level can be compensated by managing forests at the
基金Within the R&D-Programme GEOTECHNOLOGIEN this study was funded by the German Ministry of Educa-tion and Research(BMBF)and the German Research Foundation(DFG),Grant Mu 1141/3-1 and 3-2.
文摘Temporal variations of atmospheric density distribution induce changes in the gravitational air mass attraction at a specific observation site. Additionally, the load of the atmospheric masses deforms the Earth’s crust and the sea surface. Variations in the local gravity acceleration and atmospheric pressure are known to be corrected with an admittance of about 3 nm/s2 per hPa as a standard factor, which is in accordance with the IAG Resolution No. 9, 1983. A more accurate admittance factor for a gravity station is varying with time and depends on the total global mass distribution within the atmosphere. The Institut für Erdmessung (IfE) performed absolute gravity observations in the Fennoscandian land uplift area nearly every year from 2003 to 2008. The objective is to ensure a reduction with 3 nm/s2 accuracy. Therefore, atmospheric gravity changes are modeled using globally distributed ECMWF data. The attraction effect from the local zone around the gravity station is calculated with ECMWF 3D weather data describing different pressure levels up to a height of 50 km. To model the regional and global attraction, and all deformation components the Green’s functions method and surface ECMWF 2D weather data are used. For the annually performed absolute gravimetry determinations, this approach improved the reductions by 8 nm/s2 (-19 nm/s2 to +4 nm/s2). The gravity modeling was verified using superconducting gravimeter data at station Membach inBelgiumimproving the residuals by about 15%.
文摘Results of several studies point to an increase in reported child sexual abuse offences in Germany and an even higher number of undetected cases are assumed. In addition, even more cases regarding the distribution of child pornography have been reported. On behalf of victims of child sexual abuse and for the general public, a preventive treatment approach for people with a sexual interest in children is of prime importance. Currently, there is no published, evaluated therapeutic approach for treating potential offenders, dark field offenders and bright field offenders with a sexual interest in children in an outpatient setting. We designed a cognitive-behavioral therapeutic approach that integrated need- and resource-oriented concepts for the specific treatment of those people. This treatment program comprises thirteen modules and is established for a period of about one and a half years. The therapy concept is presented in detail and we report experiences with two male clients. We found a reduction of child abusive behavior (on- and off-line), cognitive distortions and subjective psychological distress, an increase of the extent of self-perceived sexual self-regulation, life satisfaction and self-efficacy in general and a high level of clients’ satisfaction with the therapy concept. The present therapy concept shows promising results as a potential viable treatment program to protect children by reaching out to people with a self-reported sexual interest in children in an outpatient setting, but further research is necessary.
基金the Japan Society for Promotion of Science （JSPS）, Grant-in-Aid for Scientific Research （C）15K04776, 2015-2018, and by the CIB in EPFL. The second author was supported by the German Science Foundation （DFG） Scientific Priority Programme SPP-1489 ＂Algorithmic and Experimental Methods in Algebra, Geometry, and Number Theory＂.
文摘We give a lower bound of the Loewy length of the projective cover of the trivial module for the group algebra kG of a finite group G of Lie type defined over a finite field of odd characteristic p, where k is an arbitrary field of characteristic p. The proof uses Auslander-Reiten theory.
