Milos Cvetkovic

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Here we show that maternal smoking downregulated, in a dose-dependent manner, cytotrophoblast expression of l-selectin and its TRA-1-81-reactive carbohydrate ligands. Cell islands -- cell columns that fail to make uterine attachments, often more numerous in the placentas of smokers -- exhibited an even greater downregulation of the l-selectin adhesion(More)
Placenta tissue may be a major source of lipid peroxidation products in pregnancy. It was proven that placental peroxidation activity increases with gestation. Selenium (Se), as an essential constituent of glutathione peroxidase (GSH-Px), takes part in the reduction of hydrogen peroxides and lipid peroxides. Malondialdehyde (MDA) is a major breakdown(More)
The intermittent and uncertain nature of renewables represents a major challenge for large scale adoption of sustainable energy resources. Of particular concern is the need to maintain both quality of grid frequency and low costs of regulation reserves in the face of increasing fluctuations in renewables. To this end, we propose an integrated dynamic market(More)
Phasor Measurement Units (PMU) and Flexible AC Transmission Systems (FACTS) have great potential for stabilizing response of the power grid to the large disturbances. A combination of both technologies can result in very powerful near-real time sensing and control capable of monitoring and counteracting the effects of very fast disturbances. In this paper(More)
This paper concerns a novel approach to the modeling and control design for transient stabilization of electric power systems using Flexible Alternating Current Transmission System (FACTS) devices. A nonlinear dynamic model of general interconnected electric power systems in the ordinary differential equation (ODE) form is proposed in terms of time-varying(More)
In this paper we propose a Dynamic Modeling and Decision Systems (DyMonDS) framework for modeling, simulating and designing cyber in the changing electric energy systems. The approach is fundamentally physics-based, which helps identify the relevant multi-layered structure of their complex dynamics. The common thread throughout the paper is the idea that(More)
Transient stability of power systems is becoming increasingly important as the grid evolves toward adopting smart, distributed and renewable technologies. The steady state methods, such as (N-1) reliability-related methods and Remedial Action Schemes (RAS), do not guarantee stable system behavior during transients. Additionally, these methods are(More)
We present a formal technique for verifying the stability of transient responses of power systems. The procedure uses reachability analysis to compute the complete set of possible transient responses starting from a set of initial states, subject to a dynamics specified by differential-algebraic equations. The method is constructive and fully automatic, two(More)
This paper introduces combined data integrity and availability attacks to expand the attack scenarios against power system state estimation. The goal of the adversary, who uses the combined attack, is to perturb the state estimates while remaining hidden from the observer. We propose security metrics that quantify vulnerability of power grids to combined(More)
Transient stabilization of power systems in response to large disturbances is a challenging problem of high complexity. The complexity arises from the large number of system states and the nonlinearities in system dynamics which evolve at various time scales. The first contribution of this paper is a two-level approach to multi-time scale modeling of power(More)