Cloud services have recently started undergoing a major shift from monolithic applications, to graphs of hundreds of loosely-coupled microservices. Microservices fundamentally change a lot of assumptions current cloud systems are designed with, and present both opportunities and challenges when optimizing for quality of service (QoS) and utilization. In this paper we explore the implications microservices have across the cloud system stack. We first present Death-StarBench, a novel, open-source benchmark suite built with microservices that is representative of large end-to-end services, modular and extensible. DeathStarBench includes a
Oxide crystals have been widely used in nonlinear optics (NLO) in the ultraviolet-visible and near-infrared regions.M ost traditional oxide crystals are restricted to the mid-infrared region due to their narrowtransmission window. Hence,a ttempting to extend infrared cutoff wavelength of oxides has attracted muchattention. Herein, we report two new tellurates Li 2 TiTeO 6 (LTT) and Li 2 SnTeO 6 (LST) with broad transparent regions of 0.38-6.72 and 0.38-6.86 mm, respectively,asexcellent candidates for mid-infrared NLO applications. Both LTTa nd LST crystallizei nt he orthorhombic space group Pnn2. The LTTcrystal exhibits intense powder secondorder generation efficiency (26 KDP) under the fundamental wavelength of 1064 nm. First-principles calculations and dipole moments were used to illustrate the results of the powder second-harmonic generations based on the crystal structures. Our results provide an ovel oxide NLO crystal with as trong SHG and wide transparency range.T hey also pave aw ay for the design of new oxide mid-IR NLO crystals.
A procedure for an "upgrade" of a linear PID controller to a non-linear homogeneous one is developed and verified by real experiments with quadrotor. The controller design is based on a generalized homogeneity (dilation symmetry) of the system. Its parameters are obtained from the gains of linear controller. The issues of digital implementation of the proposed controller are discussed. Finally, the stability and robustness properties of the homogeneous PID controller are validated on the quadrotor QDrone platform of Quanser T M .
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