University Of Hohenheim Research Articles

Advisory work as assistance in problem-solving — Problem-solving models as basic concepts for advisory work

This article summarises some basic concepts of advisory work, incorporated into novel forms of extension over the past half century at Hohenheim University, Stuttgart, Germany. It emphasis a certain understanding of advisory work: as support through “mental help” in structuring and restructuring by informing, motivating and enabling. Through exercises given in the article one can get the idea that problem situations are determined by one's own lack of insight and difficulties in breaking through the limitations of perceptions. The concept presented here in “stages of systematic problem-solving” starts with the perception of a problem by the client. The further critical steps are described within this process from perception of a problem towards solutions and evaluation of results. Two other models that are useful in thinking about problem-solving are also presented. Advisors should value them and be able to make use of them in a flexible way.

Characterization of a SINE indel polymorphism in the porcine AGL gene and assignment of the gene to chromosome 4q.

*Institute of Animal Physiology and Genetics, Academy of Sciences of the Czech Republic, 277 21 Libechov, Czech Republic. Institute of Animal Husbandry and Breeding, Department of Animal Breeding and Biotechnology, University of Hohenheim, Garbenstrasse 17, D-70593 Stuttgart, Germany. Ghent University, Faculty of Veterinary Medicine, Department of Animal Nutrition, Genetics, Breeding and Ethology, Heidestraat 19, 9820 Merelbeke, Belgium. DIPROVAL Sezione di Allevamenti Zootecnici, Faculty of Agriculture, University of Bologna, Via F.lli Rosselli 107, 42100 Reggio Emilia, Italy

Lidar Research Network Water Vapor and Wind

This paper reports on a workshop which took place on April 08/09, 2002 at the University of Hohenheim, Stuttgart, Germany. During this workshop, laser and lidar experts as well as experts in atmospheric sciences came together. The goals of this workshop were to establish an interdisciplinary network on lidar research, to develop operational reference systems for water vapor and wind lidar measurements and to demonstrate the significant impact of water vapor and wind lidar systems on climate and weather research. The main result was the setup of an interdisciplinary expert network Lidar research water vapor and wind. This network is responding to large gaps in our knowledge of the global water vapor and wind distribution and shall improve weather and climate research. The network has mainly the following objectives: 1) The development of high-performance, high-power laser transmitters for wind and water vapor measurements based on novel pump laser designs, 2) research on efficient frequency conversion techniques of the high-power pump light into wavelengths required for water vapor and wind lidar systems, 3) the development of an operational reference water vapor differential absorption lidar system, also as a demonstrator for space borne missions like the Water Vapor Lidar Experiment in Space (WALES), 4) the performance of observation system simulation experiments (OSSEs) in order to demonstrate the impact of lidar data on nowcasting and short-range weather forecast, 5) the extension of the application of current and future lidar data in combination with other instruments for process studies, 6) the design of future field studies including a new generation of remote sensing systems. The network shall investigate key questions in atmospheric sciences, particularly, the role of water vapor in the Earth's weather and climate system by the application of lidar systems with unprecedented accuracy, resolution and range.

ABOUT THE AUTHORS

ABOUT THE AUTHORS

An Alw 26I PCR-RFLP in exon 1 of the porcine SKI oncogene and mapping the gene to the RYR1 ( CRC ) linkage group on chromosome 6.

Animal GeneticsVolume 33, Issue 5 p. 377-379 An Alw26I PCR-RFLP in exon 1 of the porcine SKI oncogene and mapping the gene to the RYR1 (CRC) linkage group on chromosome 6 A. Stratil, A. Stratil Institute of Animal Physiology and Genetics, Academy of Sciences of the Czech Republic, 277 21 Liběchov, Czech Republic,Search for more papers by this authorG. Reiner, G. Reiner Department of Animal Breeding and Biotechnology, Institute of Animal Husbandry and Breeding, University of Hohenheim, Garbenstrasse 17, D-70593 Stuttgart, Germany,Search for more papers by this authorL. J. Peelman, L. J. Peelman Department of Animal Nutrition, Genetics, Breeding and Ethology, Faculty of Veterinary Medicine, Ghent University, Heidestraat 19, 9820 Merelbeke, Belgium,Search for more papers by this authorR. Davoli, R. Davoli Sezione di Allevamenti Zootecnici, DIPROVAL, Faculty of Agriculture, University of Bologna, Via F.lli Rosselli 107, 42100 Reggio Emilia, ItalySearch for more papers by this authorM. Van Poucke, M. Van Poucke Department of Animal Nutrition, Genetics, Breeding and Ethology, Faculty of Veterinary Medicine, Ghent University, Heidestraat 19, 9820 Merelbeke, Belgium,Search for more papers by this authorP. Zambonelli, P. Zambonelli Sezione di Allevamenti Zootecnici, DIPROVAL, Faculty of Agriculture, University of Bologna, Via F.lli Rosselli 107, 42100 Reggio Emilia, ItalySearch for more papers by this authorH. Geldermann, H. Geldermann Department of Animal Breeding and Biotechnology, Institute of Animal Husbandry and Breeding, University of Hohenheim, Garbenstrasse 17, D-70593 Stuttgart, Germany,Search for more papers by this author A. Stratil, A. Stratil Institute of Animal Physiology and Genetics, Academy of Sciences of the Czech Republic, 277 21 Liběchov, Czech Republic,Search for more papers by this authorG. Reiner, G. Reiner Department of Animal Breeding and Biotechnology, Institute of Animal Husbandry and Breeding, University of Hohenheim, Garbenstrasse 17, D-70593 Stuttgart, Germany,Search for more papers by this authorL. J. Peelman, L. J. Peelman Department of Animal Nutrition, Genetics, Breeding and Ethology, Faculty of Veterinary Medicine, Ghent University, Heidestraat 19, 9820 Merelbeke, Belgium,Search for more papers by this authorR. Davoli, R. Davoli Sezione di Allevamenti Zootecnici, DIPROVAL, Faculty of Agriculture, University of Bologna, Via F.lli Rosselli 107, 42100 Reggio Emilia, ItalySearch for more papers by this authorM. Van Poucke, M. Van Poucke Department of Animal Nutrition, Genetics, Breeding and Ethology, Faculty of Veterinary Medicine, Ghent University, Heidestraat 19, 9820 Merelbeke, Belgium,Search for more papers by this authorP. Zambonelli, P. Zambonelli Sezione di Allevamenti Zootecnici, DIPROVAL, Faculty of Agriculture, University of Bologna, Via F.lli Rosselli 107, 42100 Reggio Emilia, ItalySearch for more papers by this authorH. Geldermann, H. Geldermann Department of Animal Breeding and Biotechnology, Institute of Animal Husbandry and Breeding, University of Hohenheim, Garbenstrasse 17, D-70593 Stuttgart, Germany,Search for more papers by this author First published: 30 September 2002 https://doi.org/10.1046/j.1365-2052.2002.00896_2.xCitations: 2Read the full textAboutPDF ToolsRequest permissionExport citationAdd to favoritesTrack citation ShareShare Give accessShare full text accessShare full-text accessPlease review our Terms and Conditions of Use and check box below to share full-text version of article.I have read and accept the Wiley Online Library Terms and Conditions of UseShareable LinkUse the link below to share a full-text version of this article with your friends and colleagues. Learn more.Copy URL Share a linkShare onFacebookTwitterLinked InRedditWechat Citing Literature Volume33, Issue5October 2002Pages 377-379 RelatedInformation

VOLUME REDUCTION AND BIOLOGICAL STABILIZATION OF SLUDGE IN SMALL SEWAGE PLANTS BY SOLAR DRYING

ABSTRACT High investments, high dumping costs and high electrical energy consumption turn waste water treatment in small sewage plants an expensive process. Therefore, the University of Hohenheim and the company Thermo-System have developed a fully automatic low temperature solar drying plant allowing further stabilization and volume reduction of sewage sludge by continuous mixing and aerating. To test the potential of the technology, the drying process was investigated in a commercially operated municipal sewage treatment plant with aerobic sludge digestion. During experiments, the changes of the dry solids concentration and the volatile solids, the climatic conditions and the energy consumption were constantly measured and documented. It was found, that the sludge could be dried from a dry solids concentration of 3 to 93% w/w in 64 (flocculated) or 83 days (non-flocculated). At the same time, the volatile solids content was reduced from 65 to 34% w/w, respectively. The electrical energy consumption was only 22 to 28 kWh per ton of evaporated water, compared to 70 to 110 kWh required for conventional drying processes. The thermal energy for evaporation was fully covered by solar energy.

Einfluss dynamischer Radlastschwankungen auf die Kraftübertragung am Traktorreifen

The influence of dynamic tyre load on longitudinal and lateral force transmission is obvious, therefore exact knowledge of wheel load action is indispensable. With the belt test rig of Hohenheim University, tyre influence on dynamic wheel force variations was evaluated. Additionally, with the single-wheel measuring device stochastic incitation on real roadways could be investigated. Through using obstacles, the effect of varying wheel forces on generating lateral forces was examined. The build-up of lateral forces is determined here by the sudden change in the contact area. When variations in wheel load are incited by the adjustment device of the single-wheel measuring device, the wheel reacts asymmetrically to weight or no weight on the wheel.

SNPs in the porcine INHA gene and linkage mapping to SSC15.

Animal GeneticsVolume 33, Issue 3 p. 247-248 SNPs in the porcine INHA gene and linkage mapping to SSC15 S. Hiendleder, S. Hiendleder Department of Animal Breeding and Genetics, Justus-Liebig-University, Giessen, Germany., Central Biotechnical Unit Strahlenzentrum, Justus-Liebig-University, Giessen, Germany.,Search for more papers by this authorG. Reiner, G. Reiner Institute for Animal Husbandry and Animal Breeding, Division of Animal Breeding and Biotechnology, University of Hohenheim, Stuttgart, GermanySearch for more papers by this authorH. Geldermann, H. Geldermann Institute for Animal Husbandry and Animal Breeding, Division of Animal Breeding and Biotechnology, University of Hohenheim, Stuttgart, GermanySearch for more papers by this authorV. Dzapo*, V. Dzapo* Department of Animal Breeding and Genetics, Justus-Liebig-University, Giessen, Germany., Central Biotechnical Unit Strahlenzentrum, Justus-Liebig-University, Giessen, Germany.,Search for more papers by this author S. Hiendleder, S. Hiendleder Department of Animal Breeding and Genetics, Justus-Liebig-University, Giessen, Germany., Central Biotechnical Unit Strahlenzentrum, Justus-Liebig-University, Giessen, Germany.,Search for more papers by this authorG. Reiner, G. Reiner Institute for Animal Husbandry and Animal Breeding, Division of Animal Breeding and Biotechnology, University of Hohenheim, Stuttgart, GermanySearch for more papers by this authorH. Geldermann, H. Geldermann Institute for Animal Husbandry and Animal Breeding, Division of Animal Breeding and Biotechnology, University of Hohenheim, Stuttgart, GermanySearch for more papers by this authorV. Dzapo*, V. Dzapo* Department of Animal Breeding and Genetics, Justus-Liebig-University, Giessen, Germany., Central Biotechnical Unit Strahlenzentrum, Justus-Liebig-University, Giessen, Germany.,Search for more papers by this author First published: 26 May 2002 https://doi.org/10.1046/j.1365-2052.2002.t01-13-00876.xCitations: 6 Stefan Hiendleder, ([email protected]) Read the full textAboutPDF ToolsRequest permissionExport citationAdd to favoritesTrack citation ShareShare Give accessShare full text accessShare full-text accessPlease review our Terms and Conditions of Use and check box below to share full-text version of article.I have read and accept the Wiley Online Library Terms and Conditions of UseShareable LinkUse the link below to share a full-text version of this article with your friends and colleagues. Learn more.Copy URL No abstract is available for this article.Citing Literature Volume33, Issue3June 2002Pages 247-248 RelatedInformation

Comparative study of the suitability of three lichen species to trace-element air monitoring

To investigate the suitability of three lichen species ( Cetraria islandica, Evernia prunastri, and Ramalina farinacea) as transplants to trace-element air biomonitoring, they were exposed on substratum-free supports, from July 1996 until July 1997, in three European countries with different climates (Germany, Italy, Romania), at six sites with different types of air pollutants (two in each country). After 2, 4, 6, and 12 months of exposure, some portions of thallus were collected, prepared, and measured by instrumental neutron activation analysis (INAA) at the Institute of Physics and Nuclear Engineering in Bucharest and by energy dispersive X-ray fluorescence analysis (EDXRFA) at the University of Hohenheim in Stuttgart. Fifteen environmentally relevant elements: As, Br, Ca, Co, Cr, Cu, Fe, K, Mn, Ni, Pb, S, Sb, V, and Zn were determined. The analytical results were compared statistically. To study the distribution of the trace-elements between the lichens and the lichen throughfall water inside a virtual column, the throughfall water was collected under the lichen transplants during 6 and 12 months. The dried residues were analysed by INAA at Bucharest. The accumulating capacity for all investigated species is evident. For a comparative evaluation, the initial element contents, the “accumulation factors” relative to the bulk deposition, the interspecies “calibration factors”, and the “retention efficiencies”, defined as ratios of the lichen enrichment to the sum of this enrichment and the content in the lichen throughfall water, were considered. These criteria attest the best suitability for Evernia prunastri, followed by Ramalina farinacea and Cetraria islandica.

Unexpected carbonyl mobility in aminoketoses: the key to major Maillard crosslinks.

Unexpected carbonyl mobility in aminoketoses: the key to major Maillard crosslinks.

Einstreumaterialien in der Pferdehaltung

The Institute of Agricultural Engineering of the University of Hohenheim tested five different common litter materials in practical laboratory tests to determine the amount required, water absorption capacity, composting characteristics and nutrient content. Differences between the dung produced from them and the data in professional literature were noticeable.

Future performance of ground-based and airborne water-vapor differential absorption lidar II Simulations of the precision of a near-infrared, high-power system

Taking into account Poisson, background, amplifier, and speckle noise, we can simulate the precision of water-vapor measurements by using a 10-W average-power differential absorption lidar (DIAL) system. This system is currently under development at Hohenheim University, Germany, and at the American National Center for Atmospheric Research. For operation in the 940-nm region, a large set of measurement situations is described, including configurations that are considered for the first time to the authors' knowledge. They include ultrahigh-resolution measurements in the surface layer (resolutions, 1.5 m and 0.1 s) and vertically pointing measurements (resolutions, 30 m and 1 s) from the ground to 2 km in the atmospheric boundary layer. Even during daytime, the DIAL system will have a measurement range from the ground to the upper troposphere (300 m, 10 min) that can be extended from a mountain site to the lower stratosphere. From the ground, for the first time of which the authors are aware, three-dimensional fields of water vapor in the boundary layer can be investigated within a range of the order of 15 km and with an averaging time of 10 min. From an aircraft, measurements of the atmospheric boundary layer (60 m, 1 s) can be performed from a height of 4 km to the ground. At higher altitudes, up to 18 km, water-vapor profiles can still be obtained from aircraft height level to the ground. When it is being flown either in the free troposphere or in the stratosphere, the system will measure horizontal water-vapor profiles up to 12 km. We are not aware of another remote-sensing technique that provides, simultaneously, such high resolution and accuracy.

Influence of different meteorological parameters on the development of an ozone gradient between the soil surface and a level of 250 cm

In the present study the percentage ratio of the ozone concentration within and above a grass layer of 5 cm height were measured with respect to the ozone concentration at a level of 250 cm. In addition the influence of several meteorological parameters (global radiation, wind speed, temperature, relative air humidity) was determined. To this end ozone concentrations were measured at levels of 1 cm, 5 cm, 10 cm, 50 cm and 250 cm above ground at the meteorological station of the University of Hohenheim (Stuttgart, Germany) during a period from August to October 1999. The registered vertical profiles of ozone clearly show lower ozone concentrations within the vegetation layer than at the 250-cm level. It could be noticed that the ozone concentrations at the different levels measured have a typical ratio compared to the ozone concentration at the 250-cm level, the absolute amount of which had no influence on the percentage ratios close to the soil surface. At the 1-cm level the ozone concentration amounted to about 53% of the one measured at the 250-cm level, whereas this amount increased to 92% at the 50-cm level already. The percentage ratio of the ozone concentration is influenced by different meteorological factors analysed for the 1-cm level. The most important factor of influence is the wind speed which causes a logarithmic increase of the concentration ratio. A rise of the relative air humidity by about 10% results in a decline of the concentration ratio of about 4%. The influence of global radiation can be observed mostly in the mornings and evenings whereas the influence of temperature remains rather slight. As reasons for the concentration ratios observed turbulent mixing processes as well as the stomatal behaviour of plants are discussed.

Solar power for irrigation: The small solar thermal pump: an Indian development

Water is the basic element for human survival. A high percentage of the population that is without adequate water facilities mainly for agricultural needs is concentrated in solar-abundant rural areas. Most of these areas are in developing and under-developed countries and are deprived of conventional sources of energies, either due to natural shortages or because of institutional and economic reasons restricting energy availability. In India, about 45 % of GNP originates from the agricultural sector, while the consumption of agricultural pump-sets is estimated to be about 9% of total electricity supply. Out of 550,000 villages of rural India, 80,000 are still to be electrified while the majority of the villages face extensive shortages and uncertainty of electrical power supply mainly in summer when there is maximum need for irrigation. Kiran Chandwalker, Thermalsolar / Stiletto Engineers, Hyderabad, India and M v. Oppen, University of Hohenheim, Stuttgart, Germany describe an Indian development, the small solar thermal pump, that offers a cost-effective answer to irrigation problems in countries such as India.

Evaluation on gelatinization of buckwheat starch: a comparative study of Brabender viscoamylography, rapid visco-analysis, and differential scanning calorimetry

An investigation was conducted on the pasting behavior of starch from some of the buckwheat (Fagopyrum esculentum Monch) cultivars introduced from Poland, France and the former Soviet Union and cultivated at the University of Hohenheim. A comparative method study was made among Brabender viscoamylography (BV), rapid visco-analysis (RVA) and differential scanning calorimetry (DSC). The results showed that most of the buckwheat starches began to gelatinize from around 60, 70, and 80 °C as measured with DSC, RVA and BV, respectively. Buckwheat starch exhibited a higher viscosity than cereal starches. No significant difference was found between the cultivars in the gelatinization temperature according to the F test. No regression could be established between the BV and RVA methods for either the gelatinization temperature or the viscosity. The concentration had little influence on the thermal characteristics of the starch suspension as evaluated using DSC. The gelatinization temperature determined with DSC was the lowest, followed by that with BV and that then with RVA.

Pro-oxidative effect of fl-carotene in UVA light exposed human skin fibroblasts: [formula omitted] Pal Istvan Francz, Juergen Frank, Hans Konrad Biesalski. University of Hohenheim, Stuttgart D-70593 GERMANY

Pro-oxidative effect of fl-carotene in UVA light exposed human skin fibroblasts: [formula omitted] Pal Istvan Francz, Juergen Frank, Hans Konrad Biesalski. University of Hohenheim, Stuttgart D-70593 GERMANY

Revisions and Extension of the Hohenheim Oak and Pine Chronologies: New Evidence About the Timing of the Younger Dryas/Preboreal Transition

Oak and pine samples housed at the Institute of Botany, University of Hohenheim, are the backbone of the early Holocene part of the radiocarbon calibration curve, published in 1993 (Becker 1993; Kromer and Becker 1993; Stuiver and Becker 1993; Vogelet al.1993). Since then the chronologies have been revised. The revisions include 1) the discovery of 41 missing years in the oak chronology and 2) a shift of 54 yr for the oldest part back into the past. The oak chronology was also extended with new samples as far back as 10,429 BP (8480 BC). In addition, the formerly tentatively dated pine chronology (Becker 1993) has been rebuilt and shifted to an earlier date. It is now positioned by14C matching at 11,871-9900 BP (9922–7951 BC) with an uncertainty of ±20 yr (Kromer and Spurk 1998). With these new chronologies the14C calibration curve can now be corrected, eliminating the discrepancy in the dating of the Younger Dryas/Preboreal transition between the proxy data of the GRIP and GISP ice cores (Johnsenet al.1992; Tayloret al.1993), the varve chronology of Lake Gościąż (Goslaret al.1995) and the pine chronology (Becker, Kromer and Trimborn 1991).

POLICY ARENA The impact of market access on agricultural productivity: Lessons from India, Kenya and the Sudan

Journal of International DevelopmentVolume 9, Issue 1 p. 117-131 Policy Arena POLICY ARENA The impact of market access on agricultural productivity: Lessons from India, Kenya and the Sudan M. Von Oppen, M. Von Oppen Institute of Agricultural Economics and Social Sciences in the Tropics and Subtropics, Hohenheim University, Stuttgart, GermanySearch for more papers by this authorB.K. Njehia, B.K. Njehia Department of Agricultural Economics and Agri-business Management, Egerton University, KenyaSearch for more papers by this authorAbdelatif Ijaimi, Abdelatif Ijaimi Ministry of Agriculture and Nature and Animal Resources, Khartoum, SudanSearch for more papers by this author M. Von Oppen, M. Von Oppen Institute of Agricultural Economics and Social Sciences in the Tropics and Subtropics, Hohenheim University, Stuttgart, GermanySearch for more papers by this authorB.K. Njehia, B.K. Njehia Department of Agricultural Economics and Agri-business Management, Egerton University, KenyaSearch for more papers by this authorAbdelatif Ijaimi, Abdelatif Ijaimi Ministry of Agriculture and Nature and Animal Resources, Khartoum, SudanSearch for more papers by this author First published: 04 December 1998 https://doi.org/10.1002/(SICI)1099-1328(199701)9:1<117::AID-JID416>3.0.CO;2-TCitations: 6AboutPDF ToolsRequest permissionExport citationAdd to favoritesTrack citation ShareShare Give accessShare full text accessShare full-text accessPlease review our Terms and Conditions of Use and check box below to share full-text version of article.I have read and accept the Wiley Online Library Terms and Conditions of UseShareable LinkUse the link below to share a full-text version of this article with your friends and colleagues. Learn more.Copy URL Share a linkShare onFacebookTwitterLinkedInRedditWechat Citing Literature Volume9, Issue1January 1997Pages 117-131 RelatedInformation

APAD 1996 : On the move...

Like the preceding (n° 11) and subsequent (n° 13) issues, this bulletin is very much focused on the Fourth Biannual APAD Congress (les 4emesJournees APAD) which was held in June 1996 at the University of Hohenheim at Stuttgart in Germany. The theme of the congress was Negotiated Development. Brokers, Knowledge Systems, Technologies . In many respects, the Stuttgart congress continued the traditions initiated at the journees APAD in Paris (1991) and continued in Montpellier (1992) and Bama...

Gastric emptying in humans: influence of different regimens of parenteral nutrition S BURSZTEIN‐DEMYTTENAERE, KM GIL, SB HEYMSFIELD, ET AL Albert Einstein College of Medicine and Montefiore Medical Center, Bronx, New York; Columbia School of Medicine and St. Luke's‐Roosevelt Hospital Center, New York; and University of Hohenheim, Stuttgart, Germany

Nutrition in Clinical PracticeVolume 10, Issue 5 p. 195-196 Article Gastric emptying in humans: influence of different regimens of parenteral nutrition S BURSZTEIN-DEMYTTENAERE, KM GIL, SB HEYMSFIELD, ET AL Albert Einstein College of Medicine and Montefiore Medical Center, Bronx, New York; Columbia School of Medicine and St. Luke's-Roosevelt Hospital Center, New York; and University of Hohenheim, Stuttgart, Germany Carla J. Moschella, Carla J. MoschellaSearch for more papers by this author Carla J. Moschella, Carla J. MoschellaSearch for more papers by this author First published: 01 October 1995 https://doi.org/10.1177/088453369501000510AboutPDF ToolsRequest permissionExport citationAdd to favoritesTrack citation ShareShare Give accessShare full text accessShare full-text accessPlease review our Terms and Conditions of Use and check box below to share full-text version of article.I have read and accept the Wiley Online Library Terms and Conditions of UseShareable LinkUse the link below to share a full-text version of this article with your friends and colleagues. Learn more.Copy URL Share a linkShare onFacebookTwitterLinkedInRedditWechat No abstract is available for this article. Volume10, Issue5October 1995Pages 195-196 RelatedInformation