Aristóteles y Carl Schmitt sobre el derecho natural

De acordo com as interpretações mais conhecidas (por exemplo, Hofmann, Strauss, Löwith ou Kuhn), o pensamento jurídico e político de Carl Schmitt mantém distância de Aristóteles. Este artigo tem a intenção de mostrar que a concepção de direito de Schmitt, apesar de ser desenvolvida em um contexto diferente, contém semelhanças significativas com o entendimento de direito em Aristóteles. Para mostrar essa proximidade, considera-se especialmente a noção de totalidade presente no conceito aristotélico de polis, que implica que a unidade política é o principal modo de se realizar o direito.

Wie sollten wir geheim sie halten

Soitinnus: lauluääni (sopraano), piano.

[Doctrinen Walzes op. 79]

Soitinnus: orkesteri.

Wiegenlied

Soitinnus: lauluääni (sopraano), piano.

Schlechtes Wetter

Soitinnus: lauluääni (sopraano), piano.

[Kuolema ja kirkastus]

Soitinnus: orkesteri.

Accuracy Analysis of Frequency Converter Estimates in Diagnostic Applications

Transportation of fluids is one of the most common and energy intensive processes in the industrial and HVAC sectors. Pumping systems are frequently subject to engineering malpractice when dimensioned, which can lead to poor operational efficiency. Moreover, pump monitoring requires dedicated measuring equipment, which imply costly investments. Inefficient pump operation and improper maintenance can increase energy costs substantially and even lead to pump failure. A centrifugal pump is commonly driven by an induction motor. Driving the induction motor with a frequency converter can diminish energy consumption in pump drives and provide better control of a process. In addition, induction machine signals can also be estimated by modern frequency converters, dispensing with the use of sensors. If the estimates are accurate enough, a pump can be modelled and integrated into the frequency converter control scheme. This can open the possibility of joint motor and pump monitoring and diagnostics, thereby allowing the detection of reliability-reducing operating states that can lead to additional maintenance costs. The goal of this work is to study the accuracy of rotational speed, torque and shaft power estimates calculated by a frequency converter. Laboratory tests were performed in order to observe estimate behaviour in both steady-state and transient operation. An induction machine driven by a vector-controlled frequency converter, coupled with another induction machine acting as load was used in the tests. The estimated quantities were obtained through the frequency converter’s Trend Recorder software. A high-precision, HBM T12 torque-speed transducer was used to measure the actual values of the aforementioned variables. The effect of the flux optimization energy saving feature on the estimate quality was also studied. A processing function was developed in MATLAB for comparison of the obtained data. The obtained results confirm the suitability of this particular converter to provide accurate enough estimates for pumping applications.

[Niin paljon kuuluu rakkauteen]

Soitinnus: lauluäänet, soitinyhtye.

[Heijaa, heijaa hei]

Soitinnus: lauluäänet, soitinyhtye.

[Kapriisi e-molli]

Soitinnus: piano.

[Aaria La donna e mobile oopperasta Rigoletto]

Soitinnus: lauluääni (tenori), orkesteri.

[Unkarilainen tanssi nro 5]

Soitinnus: orkesteri.

[Siboney]

Soitinnus: trumpetti, orkesteri.