On metrology of electrochemical impedance spectroscopy in time-frequency domain

The paper briefly considers the metrology of electrochemical impedance spectroscopy (EIS) in time-frequency domain for analysis of nonstationary processes in liquids and organic tissues. In particular, the application of normalization operator to satisfy the stationarity condition in impedance calculation is discussed. It introduces new measurement scales as inverse functions of time func(t)E-1 and frequency-time func(f, t)E-1 or operates in dimensionless units. Such normalization shifts the focus of EIS from electrochemical test systems to external excitations affecting samples. This provides universality required for characterization of chemical, biological and biophysical interactions of different nature. Reproducible calibration of EIS devices for standardization of such measurements is described. The discussed approach is exemplified by differential EIS measurements in thermostabilized system with excitation of fluidic samples in thermal and optical way

Flora robotica -- An Architectural System Combining Living Natural Plants and Distributed Robots

Key to our project flora robotica is the idea of creating a bio-hybrid system of tightly coupled natural plants and distributed robots to grow architectural artifacts and spaces. Our motivation with this ground research project is to lay a principled foundation towards the design and implementation of living architectural systems that provide functionalities beyond those of orthodox building practice, such as self-repair, material accumulation and self-organization. Plants and robots work together to create a living organism that is inhabited by human beings. User-defined design objectives help to steer the directional growth of the plants, but also the system's interactions with its inhabitants determine locations where growth is prohibited or desired (e.g., partitions, windows, occupiable space). We report our plant species selection process and aspects of living architecture. A leitmotif of our project is the rich concept of braiding: braids are produced by robots from continuous material and serve as both scaffolds and initial architectural artifacts before plants take over and grow the desired architecture. We use light and hormones as attraction stimuli and far-red light as repelling stimulus to influence the plants. Applied sensors range from simple proximity sensing to detect the presence of plants to sophisticated sensing technology, such as electrophysiology and measurements of sap flow. We conclude by discussing our anticipated final demonstrator that integrates key features of flora robotica, such as the continuous growth process of architectural artifacts and self-repair of living architecture.Comment: 16 pages, 12 figure

Flora Robotica – Mixed Societies of Symbiotic Robot-Plant Bio-Hybrids

Besides the life-as-it-could-be driver of artificial life research there is also the concept of extending natural life by creating hybrids or mixed societies that are built from both natural and artificial components. In this paper, we motivate and present the research program of the project flora robotica. We present our concepts of control, hardware de-sign, modeling, and human interaction along with preliminary experiments. Our objective is to develop and to investigate closely linked symbiotic relationships between robots and natural plants and to explore the potentials of a plant-robot society able to produce archi-tectural artifacts and living spaces. These robot-plant bio-hybrids create synergies that allow for new functions of plants and robots. They also create novel design opportunities for an architecture that fuses the design and construction phase. The bio-hybrid is an example of mixed societies between ‘hard artificial and ‘wet natural life, which enables an interaction between natural and artificial ecologies. They form an embodied, self-organizing, and distributed cognitive system which is supposed to grow and develop over long periods of time resulting in the creation of meaningful architectural structures. A key idea is to assign equal roles to robots and plants in order to create a highly integrated, symbiotic system. Besides the gain of knowledge, this project has the objective to cre-ate a bio-hybrid system with a defined function and application – growing architectural artifacts

Stochastic 3D Navier-Stokes equations in a thin domain and its α-approximation

In the thin domain Oε = T 2 × (0, ε), where T 2 is a two-dimensional torus, we consider the 3D Navier-Stokes equations, perturbed by a white in time random force, and the Leray α-approximation for this system. We study ergodic properties of these models and their connection with the corresponding 2D models in the limit ε → 0. In particular, under natural conditions concerning the noise we show that in some rigorous sense the 2D stationary measure µ comprises asymptotical in time statistical properties of solutions for the 3D Navier-Stokes equations in Oε, when ε ≪ 1

Первый случай успешного размножения самца балобана в возрасте одного года, Республика Тыва, Россия

За последнее десятилетие в АСЭР отмечена смена старых самок балобана (Falco cherrug) на молодых более чем в 100 парах, причём почти в половине случаев размножение у этих самок прошло успешно, а в 21 паре произошла смена самцов. Но успешное размножение при смене в паре самца на годовалую птицу отмечено только в одном случае – в Республике Тыва в 2018 г. Об этом случае и пойдёт речь в данном сообщении

On the random kick-forced 3D Navier-Stokes equations in a thin domain

We consider the Navier-Stokes equations in the thin 3D domain T 2 × (0, ε), where T 2 is a two-dimensional torus. The equation is perturbed by a non-degenerate random kick-force. We establish that, firstly, when ε ≪ 1 the equation has a unique stationary measure and, secondly, after averaging in the thin direction this measure converges (as ε → 0) to a unique stationary measure for the Navier-Stokes equation on T 2. Thus, the 2D Navier-Stokes equations on surfaces describe asymptotic in time and limiting in ε statistical properties of 3D solutions in thin 3D domains