739 research outputs found
Financial Crises: Lessons from History for Today
Cataloged from PDF version of article.Making use of the propensity score matching method, we match earlier crises (pre-2007) with currently ongoing crises (post-2007). The old and new crises are matched in three dimensions: the global setting in which they occurred, the structure of the economy and the domestic vulnerabilities in the pre-crisis period. Our findings suggest that the euro periphery crises share sufficient commonalities with earlier crises in their pre-crisis domestic vulnerabilities. The study points to two important conclusions. First, the euro periphery crises are composed of unique country experiences; hence, it will not be easily resolved with a 'one-size-fits-all' set of economic policies. Secondly, while each banking crisis has its inherent uniqueness, each crisis also shares sufficient commonalities with one or more of the Asian-5 1996/97 crises, the Nordic banking crisis of the early 1990s or the Japanese banking crisis of the 1990s. Thus, the extensive knowledge accumulated through these former banking crises can help in designing recovery policies
Is environmental efficiency trade inducing or trade hindering?
Cataloged from PDF version of article.Global efforts to identify strategies for sustainable economic growth and development underline the need for understanding important links between environmental policies and international trade. In this paper, by constructing an environmental efficiency index for 111 countries from 1980 to 2009, we are able to empirically test for one such link. An improvement in the environmental efficiency index in terms of carbon dioxide emissions reflects a decrease in the cost of efforts to mitigate the environmental costs associated with growth. Countries that improve their environmental efficiency are found to experience strong international trade effects, both through increased exports and increased imports. While the positive link between efficiency improvements and exports is supportive of the Porter hypothesis, the positive link between efficiency improvements and imports is supportive of strong positive income effects on account of environmental efforts. These results, which are robust to alternative estimation strategies, lend strong support to global efforts to improve countries' environmental efficiencies. © 2014 Elsevier B.V
FMR Study of Co/Ti Bilayer Thin Films
. We focused on the interaction between two ferromagnetic cobalt layers
through a non-magnetic titanium layer. The magnetic properties of the structure
were characterized by ferromagnetic resonance technique (FMR). The data were
collected as a function of non-magnetic titanium layer thickness. Co/Ti
multilayer (Ti (50 {\AA})/Co(45 {\AA})/Ti(2-40 {\AA})/Co(40 {\AA})/Ti(100
{\AA}))films were grown onto naturally oxidized p-type single crystal Si (100)
substrate at UHV condition with magnetron sputtering system at room
temperature. The thickness of Ti spacer layer ranges from 2 to 40 {\AA} with 2
{\AA} steps. We did not observe usual optic and acoustic modes; instead we had
two broad overlapped peaks for the films ranged from 6 {\AA} to 40 {\AA}. One
interesting result was the high anisotropic resonance field values for these
films. Exchange coupling between ferromagnetic layers causes shift on resonance
field values but these shifts in our samples were much larger than expected.
This large anisotropic behavior is not clear at the moment. Our theoretical
model was not able to determine a value for the exchange coupling parameter.
One reason can be the close thickness values for Co sublayers. The other reason
can be the Ti non-magnetic layer. If titanium did not grow layer by layer on
cobalt, the cobalt ferromagnetic layers may behave as a single layer. As a
result one cannot observe exchange interaction between ferromagnetic layers
through non-magnetic spacer.Comment: 6 pages, 5 figure
Topological surface transport in epitaxial SnTe thin films grown on Bi₂Te₃
The topological crystalline insulator SnTe has been grown epitaxially on a Bi₂Te₃ buffer layer by molecular beam epitaxy. In a 30-nm-thick SnTe film, p- and n-type carriers are found to coexist, and Shubnikov–de Haas oscillation data suggest that the n-type carriers are Dirac fermions residing on the SnTe (111) surface. This transport observation of the topological surface state in a p-type topological crystalline insulator became possible due to a downward band bending on the free SnTe surface, which appears to be of intrinsic origin
Room-temperature ferromagnetism in Sr_(1-x)Y_xCoO_(3-delta) (0.2 < x < 0.25)
We have measured magnetic susceptibility and resistivity of
SrYCoO ( 0.1, 0.15, 0.2, 0.215, 0.225, 0.25, 0.3,
and 0.4), and have found that SrYCoO is a room
temperature ferromagnet with a Curie temperature of 335 K in a narrow
compositional range of 0.2 0.25. This is the highest transition
temperature among perovskite Co oxides. The saturation magnetization for
0.225 is 0.25 /Co at 10 K, which implies that the observed
ferromagnetism is a bulk effect. We attribute this ferromagnetism to a peculiar
Sr/Y ordering.Comment: 5 pages, 4 figure
Electrode Fixation with Bone Cement or Stimloc (R) in Deep Brain Stimulation Surgery: A Comparative Study
AIM: To examine the postoperative outcomes of electrode fixation using bone cement and Stimloc?? in patients with Parkinson???s MATERIAL and METHODS: Between 2016 and 2018, permanent electrode fixation was performed in 30 patients with PD, of which 15 received bone cement and the remaining 15 received Stimloc??. Data regarding preoperative Unified Parkinson???s Disease Rating Scale (UPDRS) III scores, levodopa equivalent daily dose (LEDD) values, surgery duration, and the fixation technique used were recorded. Brain computed tomography was performed for early postoperative evaluation of pneumocephalus and possible hematoma as well as for the determination of migration 1 year postoperatively. UPDRS III scores and LEDD values were re-evaluated 1 year postoperatively; surgery duration, clinical effectiveness, and complication rates were compared between the two fixation techniques. RESULTS: A statistically significant difference in application time was observed between the two techniques (bone cement: 21 min, Stimloc??: 6 min). After 1 year from surgery, 0.92- and 0.88-mm migrations were observed in the bone cement and Stimloc?? groups, respectively. A significant correlation between migration and the pneumocephalus volume was observed in both groups. No differences were observed between the groups regarding infection, migration, pneumocephalus volume, wound erosion, and CONCLUSION: Stimloc?? is preferred over bone cement for electrode fixation in DBS surgeries as it is associated with shorter application duration; this increases patient comfort and tolerance during awake surgery. Clinical efficacy and complication rates associated with both techniques are similar
Financial crises: Lessons from history for today
Making use of the propensity score matching method, we match earlier crises (pre-2007) with currently ongoing crises (post-2007). The old and new crises are matched in three dimensions: the global setting in which they occurred, the structure of the economy and the domestic vulnerabilities in the pre-crisis period. Our findings suggest that the euro periphery crises share sufficient commonalities with earlier crises in their pre-crisis domestic vulnerabilities. The study points to two important conclusions. First, the euro periphery crises are composed of unique country experiences; hence, it will not be easily resolved with a 'one-size-fits-all' set of economic policies. Secondly, while each banking crisis has its inherent uniqueness, each crisis also shares sufficient commonalities with one or more of the Asian-5 1996/97 crises, the Nordic banking crisis of the early 1990s or the Japanese banking crisis of the 1990s. Thus, the extensive knowledge accumulated through these former banking crises can help in designing recovery policies. © CEPR, CES, MSH, 2014
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