Search results for "ideal"

The future of cladoceran research

1997

The cladocerans are a group of Crustacea used as model organisms in many fields of biology. In system-atics, ecology, physiology and genetics, the cladocerans appear as frequently used examples in case studies. Their reproductive system, switching between parthenogenesis and sexual reproduction, makes them particularly suited for studies dealing with genetic and environmentally induced variability. It is on the whole a particularly handy group of animals that can be used for studying almost all kinds of evolutionary processes.

Modelling of a hydro-pneumatic system for heave compensation

2018

This paper presents a mathematical model of the dynamic behaviour of a passive heave compensation system. The main purpose is to develop a model that enables cost-efficient prototyping and testing of the control system in an active heave compensator. The physics are described by first principles, and result in 21 ordinary differential equations. Temperature calculations are included as an option during simulation in order to investigate its effect on the results. Similarly is a non-ideal gas law (Redlich-Kwong equation) implemented and compared to the ideal gas law. Verification against field data shows that the model is in good accordance with real-life drilling operations. It is further s…

Robust Fault Detection of Linear Uncertain Time-Delay Systems Using Unknown Input Observers

2013

This paper deals with the problem of fault detection for linear uncertain time-delay systems. The proposed method for Luenberger observers is developed for unknown input observers (UIOs), and a novel procedure for the design of residual based on UIOs is presented. The design procedure is carried out based on the ${H}_{\infty }$ model matching approach which minimizes the difference between generated residuals by the optimal observer and those by the designed observer in the presence of uncertainties. The optimal observer is designed for the ideal system and works so that the fault effect is maximized while the exogenous disturbances and noise effects are minimized. This observer can give di…

Magnetic Properties of Ni II Cr III Layered Double Hydroxide Materials

2008

This paper describes the isolation of four layered double hydroxide (LDH) compounds having the general formula[NiII3–xCrIIIx(OH)6](CO3)x/2·yH2O [x = 0.57 (1), 0.69 (2), 0.81 (3) and 0.93 (4)] by using homogeneous precipitation methods and varying the metal ratio in the synthetic solutions. All the reported compounds have carbonate anions in the interlamellar space. This fact forces the interlayer distances to remain unchanged in all the cases, thus providing an ideal system in which the changes observed in magnetic properties can be correlated with metal composition along the hydroxide layers.(© Wiley-VCH Verlag GmbH & Co. KGaA, 69451 Weinheim, Germany, 2008)

f2(1810) as a triangle singularity

2017

We perform calculations showing that a source producing ${K}^{*}{\overline{K}}^{*}$ in $J=2$ and $L=0$ gives rise to a triangle singularity at 1810 MeV with a width of about 200 MeV from the mechanism ${K}^{*}\ensuremath{\rightarrow}\ensuremath{\pi}K$ and then $K{\overline{K}}^{*}$ merging into the ${a}_{1}(1260)$ resonance. We suggest that this is the origin of the present ${f}_{2}(1810)$ resonance and propose to look at the $\ensuremath{\pi}{a}_{1}(1260)$ mode in several reactions to clarify the issue.

Homenaje a Vidal-Beneyto

2010

La perversión de los ideales / 1

2008

"Las cooperativas deberían ser uno de los instrumentos más eficaces para que se organicen 'los mandatos'"

2009

The Relativity of Reality

2020

According to conceptual relativism, reality crucially depends on the mind and the language of a person. The world does not present itself as already made or arranged. People have different ways of categorising and conceptualising the world. Because according to conceptual relativism, what exists also depends on conceptual frameworks, it can also be called ontological relativism. We must note that ontological relativism does not mean that the mind creates or generates reality and its objects as a craftsman creates a ceramic object. That would be idealism. Relativism does not deny that the world exists and affects our senses, experiences and knowledge. But despite this, we cannot know how the…

Fichte und die Metaphysik des deutschen Idealismus

1996

Im November 1917, im Rahmen der von der Universiüit Freiburg organisierten Kurse füi· die Kriegsteilnehmer, hielt Edmund Husserl drei . Vortrage über das Thema ,Fichtes Menschheits Ideal'. ,Seit 1914', sagt er, ,ist der Tod ... kein Ausnahmeereignis mehr. Der Tod hat sich sein heiliges Urrecht wieder erstritten. Er ist wieder der groBe Mahner in der Zeit an die Ewigkeit.' 1 ,;Und so sind uns denn auch neue Sehorgane für den deutscheri Idealismus erwachsen . ; . für Fichte, den Philosophen der Befreiungskriege. Von ihm, von seiner Neugestaltung der Ideale echten Menschentums aus den tiefen Quellen seiner Philosophie will ich hier sprechen.' Neue Sehorgane, denrt w&s unsere Beziehung zum deut…