We study rational double Hurwitz cycles, i.e. loci of marked rational stable curves admitting a map to the projective line with assigned ramification profiles over two fixed branch points. Generalizing the phenomenon observed for double Hurwitz numbers, such cycles are piecewise polynomial in the entries of the special ramification; the chambers of polynomiality and wall crossings have an expli...

Tiny Li4Ti5O12 nanoparticles embedded in carbon nanofibers (Li4Ti5O12@C hierarchical nanofibers) were synthesized using a scalable synthesis technique involving electrospinning and annealing in an Ar atmosphere for the purpose of using them as anode materials for high-capacity and high-rate-capability Li-ion and Na-ion batteries. The Li4Ti5O12@C hierarchical nanofibers exhibited high stable dis...

We present a novel mid-IR source based on optical parametric chirped pulse amplification (OPCPA) generating 96 fs pulses (9.0 cycles) at 3.2 mm with an energy of 1.2 microJ, at a repetition rate of 100 kHz. The amplified spectrum supports a minimum Fourier transform limited pulse duration of 45 fs, or 4.2 cycles. Our use of OPCPA allows the direct amplification of few-cycle pulses at this mid-I...

Designers and developers try to build stable and multi-domain software components while the software infrastructure they use keeps evolving and thus being heterogeneous. This can be called “the business and technical life cycles mismatch”. The paper shows where and why middleware technologies fail to solve the business and technical life cycles mismatch. Then it demonstrates that lots of the ni...

Time-series analysis reveals two dominant, stable long-term periodicities approximately equal to 33 +/- 3 and 260 +/- 25 million years in the known series of geological and biological upheavals during the Phanerozoic Eon. Because the cycles of these episodes agree in period and phase with the cycles of impact cratering on Earth, these results suggest that periodic comet impacts strongly influen...

A property P defined on all graphs of order n is said to be k-stable if for any graph of order n that does not satisfy P , the fact that uv is not an edge of G and that G+uv satisfies P implies dG(u)+dG(v) < k. Every property is (2n−3)-stable and every k-stable property is (k+1)stable. We denote by s(P ) the smallest integer k such that P is k-stable and call it the stability of P . This number...

STUDY QUESTION Are there any changes in the treatments involving ART and IUI initiated in Europe during 2013 compared with previous years? SUMMARY ANSWER An increase in the overall number of ART cycles resulting from a higher number of countries reporting data was evident, the pregnancy rates (PRs) in 2013 remained stable compared with those reported in 2012, the number of transfers with mult...