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Temperature Dependence of Creep Induced Anisotropy in Nanocrystalline Fe-Cu-Nb-Si-B Alloys
Giselher Herzer,Mie Marsilius,Christian Polak 한국물리학회 2013 THE JOURNAL OF THE KOREAN PHYSICAL SOCIETY Vol.62 No.10
Nanocrystallisation of Fe75Cu1Nb3Si8B13 under tensile stress results in a creep induced anisotropy which, at room temperature, is characterised by a magnetic easy axis along the stress axis. However,this magnetic easy ribbon axis becomes a magnetic hard ribbon axis when the measuring temperature T decreases below a compensation temperature T0 where the creep induced magnetic anisotropy vanishes. Accordingly, the magnetisation curve changes from a square loop for T > T0to a linear loop with low remanence forT < T0 . In the present case (8 at% Si), T0 is about –2 ◦C for the fully developed nanocrystalline state. Although slightly depending on the annealing conditions,T0 is primarily determined by the Si content and shifts towards higher temperatures by about 50◦C per at% Si with increasing Si concentration.
Outward FDI, Total Factor Productivity and Domestic Output: Evidence from Germany
Dierk Herzer 한국국제경제학회 2012 International Economic Journal Vol.26 No.1
This paper examines the impact of outward FDI on domestic output and total factor productivity by applying cointegration techniques to macroeconomic time series data for Germany. We find a positive relationship between outward FDI and domestic output as well as between outward FDI and total factor productivity. Furthermore, our results indicate that there is bidirectional causality between outward FDI and domestic output, and outward FDI and total factor productivity, suggesting that increased output and productivity are both a consequence and a cause of increased outward FDI. Overall, the results of this paper can be interpreted as evidence of productivity-enhancing, and thus growth-enhancing, effects of outward FDI, which is inconsistent with the simplistic idea that outward investment represents a diversion of domestic economic activity.
Refugee Immigration and Total Factor Productivity
Dierk Herzer 한국국제경제학회 2017 International Economic Journal Vol.31 No.3
This paper uses panel cointegration and causality techniques to examine the long-run relationship between refuge immigration and total factor productivity (TFP), a relationship that has not yet been examined in the literature. It is found that refugee immigration has, on average, a positive long-run effect on TFP, suggesting that refuge immigration increases the diversity of skills and ideas available to society as a whole, which in turn promotes specialization and innovation. It is also found that causality is unidirectional from refugee immigration to TFP, suggesting that refugees are primarily motivated by the push factor of persecution in the source country rather than by productivity (and hence welfare) gains as a potential pull factor in the destination country.
Korbinian Nagel,Dierk Herzer,PETER NUNNENKAMP 한국국제경제학회 2015 International Economic Journal Vol.29 No.4
This paper investigates the impact of foreign direct investment (FDI) on population health using panel data for up to 179 countries for the period between 1980 and 2011. Our main finding is that the relationship between FDI and health is nonlinear, depending on the level of income: FDI has a positive effect on health at low levels of income, but the effect decreases with increasing income, then changes sign and becomes increasingly negative at higher levels of income.
Morsdorf, L.,Pradeep, K. G.,Herzer, G.,Ková,cs, A.,Dunin-Borkowski, R. E.,Povstugar, I.,Konygin, G.,Choi, P.,Raabe, D. American Institute of Physics 2016 JOURNAL OF APPLIED PHYSICS - Vol.119 No.12
<P>Nucleation of soft magnetic Fe3Si nanocrystals in Cu-free Fe74.5Si15.5Nb3B7 alloy, upon rapid (10 s) and conventional (30 min) annealing, was investigated using x-ray diffraction, transmission electron microscopy, Mossbauer spectroscopy, and atom probe tomography. By employing rapid annealing, preferential nucleation of Fe3Si nanocrystals was achieved, whereas otherwise there is simultaneous nucleation of both Fe3Si and undesired Fe-B compound phases. Analysis revealed that the enhanced Nb diffusivity, achieved during rapid annealing, facilitates homogeneous nucleation of Fe3Si nanocrystals while shifting the secondary Fe-B crystallization to higher temperatures resulting in pure soft magnetic nanocrystallization with very low coercivities of similar to 10 A/m. (C) 2016 AIP Publishing LLC.</P>
( Sandzhar Abdullaev ),( T. M. Welzel ),( J. Petersen ),( K. Herzer ),( P. Ferenci ),( M. Gschwantler ),( M. Cornberg ),( P. Ingiliz ),( T. Berg ),( U. Spengler ),( O. Weiland ),( M. Van Der Valk ),( 대한간학회 2016 춘·추계 학술대회 (KASL) Vol.2016 No.1
Aims: The all-oral, pan-genotypic combination of daclatasvir+sofosbuvir± ribavirin (DCV+SOF±RBV) demonstrated high sustained virologic response rates at posttreatment Week 12 (SVR12) in phase 3 studies of patients with chronic HCV. We report efficacy and safety results from a large European compassionate use program that provided DCV+SOF±RBV therapy to patients with chronic HCV infection and severe liver disease. Methods: Eligible patients were adults with chronic HCV infection at a high risk of hepatic decompensation or death within 12 months if left untreated, or urgent need of viral clearance due to extrahepatic manifestations or comorbidities, and with no available treatment options. Patients received DCV(60mg)+SOF(400mg) once daily for 24 weeks; RBV addition or reduced treatment duration was the physician’s choice. The primary efficacy outcome was SVR12. Results: Efficacy data were available for 436/485 patients enrolled. Most patients were HCV treatment experienced (70%) with mean HCV RNA 5.5 log10 IU/mL. 388 (80%) patients had confirmed cirrhosis( Child-Pugh class B or C, 165 (43%); MELD scores>15, 37 (10%)) , 87 patients (18%) had received liver transplants and 55 (11%) were HIV/HCV coinfected. SVR12 was achieved by 394/436 (90%) patients (table). There were 13 relapses and 1 on-treatment virologic failure. SVR12 rates were similar with/without ribavirin and comparable across HCV GT, presence of cirrhosis, liver transplant status, HIV coinfection, and other baseline characteristics. There were 28 deaths over treatment or follow-up (none considered treatment-related), 91 experienced serious adverse events (11 considered treatment-related), and 38 discontinued treatment or died due to adverse events (10 treatment- related). Most deaths and serious adverse events were directly or indirectly associated with advanced liver disease. Adverse events (any grade) occurring in ≥5% of patients were fatigue, anaemia, headache, nausea, and diarrhoea. Conclusions: The all-oral regimen of DCV+SOF±RBV was highly effective and well tolerated in this large European real-world cohort of patients with advanced liver disease.