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( Monika Hartmann ) 세종대학교 경제통합연구소 1993 Journal of Economic Integration Vol.8 No.2
There is a growing concern throughout Europe with the environmental effects of intensive farming practices. This new awareness has led to the demand for stricter environmental regulations. The theoretical part of the paper explores the possible effects of environmental regulations. The theoretical part of the paper explores the possible effects of environmental regulations and health standards on competitive advantage, trade and welfare. The empirical part of the paper is based on the SWOPSIM model TEPSIM, which encompasses factors of production, such as pesticides, fertilizer and land. Using this extended SWOPSIM framework the impact of alternative environmental policy scenarios on agricultural trade and economic welfare is simulated.
Hartmann, Thomas,Shrestha, Tej B.,Bossmann, Stefan H.,Hubner, Christian,Renn, Alois,Durr, Heinz Korean Society of Photoscience 2009 Photochemical & photobiological sciences Vol.8 No.8
We have synthesized a prototype of a photochromic styrylquinolyl-dihydroindolizine (DHI), which forms a highly coloured and fluorescent betaine upon irradiation with $\lambda$ < 400 nm. Embedding this photochromic DHI in a thin polymethyl methacrylate (PMMA) film permits the non-destructive readout via fluorescence at low temperature (77 K). Thus, either a non-destructive photoswitch or an information recording system becomes available. Both possibilities have been explored: image recording and read-out, as well as information storage (at 77 K) have been demonstrated. Cluster- and single molecule-fluorescence upon laser excitation ($\lambda$ = 355 nm) of the styrylquinolyl-dihydroindolizine in a PMMA matrix, and the effect of fluorescence blinking has been observed.
The Effects of EC Environmental Policies on Agricultural Trade and Economic Welfare
Hartmann, Monika 세종대학교 국제경제연구소 1993 Journal of Economic Integration Vol.8 No.2
There is a growing concern throughout Europe with the environmental effects of intensive farming practices. This new awareness has led to the demand for stricter environmental regulations. The theoretical part of the paper explores the possible effects of environmental regulation. The theoretical part of the paper explores the possible effects of environmental regulations and health standards on competitive advantage, trade and welfare. The empirical part of the paper is based on the SWOPSIM model TEPSIM, which encompasses factors of production, such as pesticides, fertilizer and land. Using this extended SWOPSIM framework the impact of alternative environmental policy scenarios on agricultural trade and economic welfare is simulated.
SAFETY ANALYSIS METHODOLOGY FOR AGED CANDU<sup>®</sup> 6 NUCLEAR REACTORS
Hartmann, Wolfgang,Jung, Jong Yeob Korean Nuclear Society 2013 Nuclear Engineering and Technology Vol.45 No.5
This paper deals with the Safety Analysis for $CANDU^{(R)}$ 6 nuclear reactors as affected by main Heat Transport System (HTS) aging. Operational and aging related changes of the HTS throughout its lifetime may lead to restrictions in certain safety system settings and hence some restriction in performance under certain conditions. A step in confirming safe reactor operation is the tracking of relevant data and their corresponding interpretation by the use of appropriate thermal-hydraulic analytic models. Safety analyses ranging from the assessment of safety limits associated with the prevention of intermittent fuel sheath dryout for a slow Loss of Regulation (LOR) analysis and fission gas release after a fuel failure are summarized. Specifically for fission gas release, the thermal-hydraulic analysis for a fresh core and an 11 Effective Full Power Years (EFPY) aged core was summarized, leading to the most severe stagnation break sizes for the inlet feeder break and the channel failure time. Associated coolant conditions provide the input data for fuel analyses. Based on the thermal-hydraulic data, the fission product inventory under normal operating conditions may be calculated for both fresh and aged cores, and the fission gas release may be evaluated during the transient. This analysis plays a major role in determining possible radiation doses to the public after postulated accidents have occurred.
Switching Transient Shaping by Application of a Magnetically Coupled PCB Damping Layer
Hartmann, Michael,Musing, Andreas,Kolar, Johann W. The Korean Institute of Power Electronics 2009 JOURNAL OF POWER ELECTRONICS Vol.9 No.2
An increasing number of power electronic applications require high power density. Therefore, the switching frequency and switching speed have to be raised considerably. However, the very fast switching transients induce a strong voltage and current ringing. In this work, a novel damping concept is introduced where the parasitic wiring inductances are advantageously magnetically coupled with a damping layer for attenuating these unwanted oscillations. The proposed damping layer can be implemented using standard materials and printed circuit board manufacturing processes. The system behavior is analyzed in detail and design guidelines for a damping layer with optimized RC termination network are given. The effectiveness of the introduced layer is determined by layout parasitics which are calculated by application of the Partial Element Equivalent Circuit (PEEC) simulation method. Finally, simulations and measurements on a laboratory prototype demonstrate the good performance of the proposed damping approach.
Landmark Initialization for Unscented Kalman Filter Sensor Fusion in Monocular Camera Localization
Hartmann, Gabriel,Huang, Fay,Klette, Reinhard Korean Institute of Intelligent Systems 2013 INTERNATIONAL JOURNAL of FUZZY LOGIC and INTELLIGE Vol.13 No.1
The determination of the pose of the imaging camera is a fundamental problem in computer vision. In the monocular case, difficulties in determining the scene scale and the limitation to bearing-only measurements increase the difficulty in estimating camera pose accurately. Many mobile phones now contain inertial measurement devices, which may lend some aid to the task of determining camera pose. In this study, by means of simulation and real-world experimentation, we explore an approach to monocular camera localization that incorporates both observations of the environment and measurements from accelerometers and gyroscopes. The unscented Kalman filter was implemented for this task. Our main contribution is a novel approach to landmark initialization in a Kalman filter; we characterize the tolerance to noise that this approach allows.
Hartmann, Pascal,Lee, Doh-Kwon,Smarsly, Bernd M.,Janek, Juergen American Chemical Society 2010 ACS NANO Vol.4 No.6
<P>This paper describes a systematic comparison of the photoelectrochemical properties of mesoporous TiO<SUB>2</SUB> films prepared by the two most prevalent templating methods: The use of preformed, crystalline nanoparticles is generally considered advantageous compared to the usage of molecular precursors such as TiCl<SUB>4</SUB>, since the latter requires a separate heat treatment at elevated temperature to induce crystallization. However, our photoelectrochemical experiments clearly show that sol−gel derived mesoporous TiO<SUB>2</SUB> films cause an about 10 times higher efficiency for the water splitting reaction than their counterparts obtained from crystalline TiO<SUB>2</SUB> nanoparticles. This result indicates that for electrochemical applications the performance of nanoparticle-based metal oxide films might suffer from insufficient electronic connectivity.</P><P><B>Graphic Abstract</B> <IMG SRC='http://pubs.acs.org/appl/literatum/publisher/achs/journals/content/ancac3/2010/ancac3.2010.4.issue-6/nn1004765/production/images/medium/nn-2010-004765_0008.gif'></P><P><A href='http://pubs.acs.org/doi/suppl/10.1021/nn1004765'>ACS Electronic Supporting Info</A></P>
Influence of Surface Roughness of Tools on the Friction Stir Welding Process
Hartmann, Michael,Bohm, Stefan,Schuddekopf, Sven The Korean Welding and Joining Society 2014 대한용접·접합학회지 Vol.32 No.6
Most publications on friction stir welding describe phenomena or results with given process parameters like feed rate, rotation speed, angle and depth of penetration. But without a complete documentation of tool design, the results under the same process parameters are completely different. For this purpose, the Institute of Cutting and Joining Manufacturing Processes (tff), University of Kassel investigated the influence of tool roughness on the friction stir welding process. Therefore a defined surface finish was produced by turning and die sinking. As basis of comparison the constant parameters were rotation speed, feed rate, tilt angle and a heel plunge depth. Sound butt-welds were produced in aluminium alloy 6082 (AlMgSi1) with 1.5 mm sheet thickness with a turned reference tool with a surface of $Ra=0.575{\mu}m$ in position controlled mode. The surfaces are manufactured from a very fine to a very rough structure, classified by the VDI-classes with differences in the arithmetical mean roughness. It can be demonstrated with the help of temperature measures, that less heat is generated at the surfaces of the shoulder and the pin by the higher roughness due to lower active friction contact surface. This can also be seen in the resulting wormhole defects.