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Mapping forest age using National Forest Inventory,airborne laser scanning,and Sentinel-2 data

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Forest Ecosystems 2020年第4期7卷 793-806页

作者： johannes Schumacher Marius Hauglin Rasmus Astrup johannes Breidenbach National Forest Inventory Norwegian Institute of Bioeconomy ResearchÅsNorway

Background:The age of forest stands is critical information for forest management and conservation,for example for growth modelling,timing of management activities and harvesting,or decisions about protection ***,area-wide information about forest stand age often does not *** this study,we developed regression models for large-scale area-wide prediction of age in Norwegian *** model development we used more than 4800 plots of the Norwegian National Forest Inventory(NFI)distributed over Norway between latitudes 58°and 65°N in an 18.2 Mha study *** variables were based on airborne laser scanning(ALS),Sentinel-2,and existing public map *** performed model validation on an independent data set consisting of 63 spruce stands with known ***:The best modelling strategy was to fit independent linear regression models to each observed site index(SI)level and using a SI prediction map in the application of the *** most important predictor variable was an upper percentile of the ALS heights,and root mean squared errors(RMSEs)ranged between 3 and 31 years(6%to 26%)for SI-specific models,and 21 years(25%)on *** deviance(MD)ranged between^(−1) and 3 *** models improved with increasing SI and the RMSEs were largest for low SI stands older than 100 *** a mapped SI,which is required for practical applications,RMSE and MD on plot level ranged from 19 to 56 years(29%to 53%),and 5 to 37 years(5%to 31%),*** the validation stands,the RMSE and MD were 12(22%)and 2 years(3%),***:Tree height estimated from airborne laser scanning and predicted site index were the most important variables in the models describing ***,we obtained good results,especially for stands with high *** models could be considered for practical applications,although we see considerable potential for improvements if better SI maps were available.

关键词： Forest age Lidar Optical satellite images Remote sensing Forest inventory

Here comes the sun:How optimization of photosynthetic light reactions can boost crop yields

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Journal of Integrative Plant Biology 2022年第2期64卷 564-591页

作者： Julia Walter johannes Kromdijk Department of Plant Sciences University of CambridgeCambridgeCB23EA UK Carl R Woese Institute for Genomic Biology University of Illinois Urbana-ChampaignUrbanaIllinois61801 USA

Photosynthesis started to evolve some 3.5 billion years ago CO;is the substrate for photosynthesis and in the past 200-250 years,atmospheric levels have approximately doubled due to human industrial ***,this time span is not sufficient for adaptation mechanisms of photosynthesis to be evolutionarily *** increases in human population,shortage of arable land and food,and climate change call for actions,*** to substantial research efforts and advances in the last century,basic knowledge of photosynthetic and primary metabolic processes can now be translated into strategies to optimize photosynthesis to its full potential in order to improve crop yields and food supply for the *** different approaches have been proposed in recent years,some of which have already proven successful in different crop ***,we summarize recent advances on modifications of the complex network of photosynthetic light *** are the starting point of all biomass production and supply the energy equivalents necessary for downstream processes as well as the oxygen we breathe.

关键词： bioengineering crop improvement electron transfer light reactions photosynthesis photosystem stress tolerance

Improved data gap-filling schemes for estimation of net ecosystem exchange in typical East-Asian croplands

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Science China Earth Sciences 2016年第8期59卷 1652-1664页

作者： ZHAO Peng johannes LüERS Department of Micrometeorology University of Bayreuth Institute of Ecology University of Innsbruck Member of Bayreuth Center of Ecology and Environmental Research (BayCEER) University of Bayreuth

The estimation of carbon exchange between ecosystems and the atmosphere suffers unavoidable data gaps in eddy-covariance technique, especially for short-living and fast-growing croplands. In this study we developed a modified gap-filling scheme introducing a leaf area index factor as the vegetation status information based on the conventional light response function for two East-Asian cropland sites (rice and potatoes). This scheme’s performance is comparable to the conventional time window scheme, but has the advantage when the gaps are large compared to the total length of the time series. To investigate how the time binning approach performs for fast-growing croplands, we tested different widths of the time window, showing that a four-day window for the potato field and an eight-day time window for the rice field perform the best. The insufficiency of the conventional temperature binning approach was explained as well as the influence of vapor pressure deficit. We found that vapor pressure deficit plays a minor role in both the potato and the rice fields under Asian monsoon weather conditions with the exception of the early pre-monsoon growing stage of the potatoes. Consequently, we recommend using the conventional time-window scheme together with our new leaf-light response function to fill data gaps of net ecosystem exchange in fast-growing croplands.

关键词： Eddy-covariance Gap-filling Net ecosystem exchange LAI

Encapsulation of Ru(II) Polypyridine Complexes for Tumor-Targeted Anticancer Therapy

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Biomedical Engineering Frontiers 2023年第1期4卷 52-65页

作者： johannes Karges Faculty of Chemistry and Biochemistry Ruhr-University BochumUniversitasstrasse 15044780 BochumGermany.

Ru(II)polypyridine complexes have attracted much attention as anticancer agents because of their unique photophysical,photochemical,and biological *** their promising therapeutic profile,the vast majority of compounds are associated with poor water solubility and poor cancer *** the different strategies employed to overcome these pharmacological limitations,many research efforts have been devoted to the physical or covalent encapsulation of the Ru(II)polypyridine complexes into *** article highlights recent developments in the design,preparation,and physicochemical properties of Ru(II)polypyridine complex-loaded nanoparticles for their potential application in anticancer therapy.

关键词： properties. pyridine complexes

^(13)C analysis of cow tail hair and farm slurry can be used to implicitly distinguish between different dairy production systems

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Ecological Processes 2023年第1期12卷 98-109页

作者： Friederike Sieve johannes Isselstein Manfred Kayser Department of Crop Science Grassland ScienceGeorg-August University GöttingenVon-Siebold-Str.837075 GöttingenGermany Geo-Lab University of VechtaDriverstraße 2249377 VechtaGermany

Background Public interest in the way food is produced on the farm and processed along the food-production chain is *** analysis of isotopic signatures(^(13)C)in cow tail hair provides a method to reconstruct the dietary proportion of maize in cow *** on this,we further investigated whether there is a relationship between isotopic signatures in cow tail hair or farm slurry and the proportion of maize of the total utilized agricultural area per farm[%].We did an on-farm survey on 17 dairy farms in coastal Northwest Germany and collected cow tail hair from dairy cows and slurry samples on each *** farms differed in their feeding regime(C_(3) vs.C_(4) plants),their site conditions(sandy soil=‘Geestland’;organic soil=‘Peatland’;clayey soil=‘Marshland’),and in the area cultivated with maize as a proportion of the total utilized agricultural area per *** We found a positive relationship between δ^(13)C values in both cow tail hair and slurry and the annual dietary proportion of maize(R^(2)=0.67;and R^(2)=0.63).Furthermore,we confirmed that there was a relationship betweenδ^(13)C values in cow tail hair and area of maize as a proportion of the total utilized agricultural area per farm(R^(2)=0.69).Conclusion Our findings suggest a general applicability of using isotopic signatures(^(13)C)along a wide gradient of site conditions and productions systems in practice.

关键词： Stable isotopes Natural^(13)C abundance Environmental indicator Maize Dietary composition Traceability

The AGROVOC Concept Scheme-A Walkthrough

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Journal of Integrative Agriculture 2012年第5期11卷 694-699页

作者： Sachit Rajbhandari johannes Keizer Food and Agriculture Organization of the United Nations Rome 00153Italy

The Food and Agriculture Organization is developing a concept based multilingual vocabulary management tool to manage thesauri, authority lists and glossaries expressed as concept schemes ready to be used in a linked data environment. In this paper, we described the evolution of the AGROVOC thesaurus to AGROVOC Concept Scheme based on OWL （web ontology language） model and now shifting to SKOS （simple knowledge organization system） model. The paper explained why and how it evolved highlighting the key differences between different models. The system architecture and significant set of features available in the VocBench was discussed in the paper.

关键词： semantic web ontologies thesauri OWL SKOS AGROVOC

Robust control for electric vehicle powertrains

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Control Theory and Technology 2019年第4期17卷 382-392页

作者： johannes BUERGER James ANDERSON BMW Group MunichGermany Department of Computing and Mathematical Sciences the California Institute of TechnologyPasadenaU.S.A.

This paper considers the application of robust control methods(μ-and H∞-synthesis)to the speed and acceleration control problem encountered in electric vehicle *** this end,we consider a two degree of freedom control structure with a reference *** underlying powertrain model is derived and combined into the corresponding interconnected system required forμ-and H∞-*** closed-loop performance of the resulting controllers are compared in a detailed simulation analysis that includes nonlinear *** is observed that theμ-controller offers performance advantages in particular for the acceleration control problem,but at the price of a high-order controller.

关键词： Automotive control electric vehicle powertrains robust control

Current treatment of ulcerative colitis

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World Journal of Gastroenterology 2011年第27期17卷 3204-3212页

作者： johannes Meier Andreas Sturm Department of Hepatology and Gastroenterology Charité-Universittsmedizin Berlin Campus Virchow Clinic13353 BerlinGermany

Ulcerative colitis (UC) is a chronic disease featuring re- current inflammation of the colonic mucosa. The goal of medical treatment is to rapidly induce a steroid-free remission while at the same time preventing complica- tions of the disease itself and its treatment. The choice of treatment depends on severity, localization and the course of the disease. For proctitis, topical therapy with 5-aminosalicylic acid (5-ASA) compounds is used. More extensive or severe disease should be treated with oral and local 5-ASA compounds and corticosteroids to induce remission. Patients who do not respond to this treatment require hospitalization. Intravenous steroids or, when refractory, calcineurin inhibitors (cyclosporine, tacrolimus), tumor necrosis factor-α antibodies (infliximab) or immunomodulators (azathioprine, 6-mercaptopurine) are then called for. Indications for emergency surgery include refractory toxic megacolon, perforation, and continuous severe colorectal bleeding. Close collaboration between gastroenterologist and surgeon is mandatory in order not to delay surgical therapy when needed. This article is intended to give a general, practice-orientated overview of the key issues in ulcerative colitis treatment. Recommendations are based on published consensus guidelines derived from national and international guidelines on the treatment of ulcerative colitis.

关键词： Ulcerative colitis Inflammatory bowel disease Medical management Diagnosis Azathioprine TNF-α blocker

On the applicability of the single parabolic band model to advanced thermoelectric materials with complex band structures

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Journal of Materiomics 2021年第3期7卷 603-611页

作者： johannes de Boor Institute of Materials Research German Aerospace Center(DLR)51147KoelnGermany

Due to the complex interplay between composition,synthesis parameters and the performance of thermoelectric materials,the optimization of thermoelectric materials needs to be complemented by modelling.A relatively simple and thus popular approach is the so called single parabolic band model,which allows for an efficient optimization of the material properties and a benchmarking of different materials based on relatively few,well available experimental *** complex band structures are common for high performance materials,single parabolic band modelling is also employed with apparent success for material systems where the underlying assumptions are not well *** order to assess the validity of a single parabolic band analysis for such systems,the thermoelectric properties for two model systems are calculated:one with a single band that is twofold degenerate and one with a light and a heavy *** if the density of states masses and the scattering potentials are kept identical,the transport properties and in particular the Hall coefficients differ significantly,which leads to an incorrectly determined carrier *** the carrier concentration is the base for the single parabolic band analysis,all the quantities obtained from it(optimum carrier concentration,effective mass,deformation potential)are determined incorrectly as well.

关键词： Thermoelectrics Electrical transport Single parabolic band model