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Introduction. Variations in the urogenital vascular anomalies in the abdomen are common. However, they warrant attention due to their importance in operative, diagnostic, and endovascular procedures. Aim. The aim of this article is to show an example of a patient with rare kidney and vessels anomalies. We want to prove that those anomalies contributed to development of urolithiasis in this case. Description...
By means of a constructive example we show that clustering of Locational Marginal Prices (LMPs) might give unsatisfactory results of zonal division of energy market. Specifically, we find that the division obtained from clustering of LMPs in some cases may not place the congested lines on the zones' borders. This results in a need for costly readjustments after the Market Coupling mechanism has found...
Zonal configuration of energy market is often a consequence of political borders. However there are a few methods developed to help with zonal delimitation in respect to some measures. This paper presents the approach aiming at reduction of the loop flow effect — an element of unscheduled flows which introduces a loss of market efficiency. In order to undertake zonal partitioning, a detailed decomposition...
One of the methodologies that carry out the division of the electrical grid into zones is based on the aggregation of nodes characterized by similar Power Transfer Distribution Factors (PTDFs). Here, we point out that satisfactory clustering algorithm should take into account two aspects. First, nodes of similar impact on cross-border lines should be grouped together. Second, cross-border power flows...
Adopting a zonal structure of electricity market requires specification of zones' borders. In this paper we use social welfare as the measure to assess quality of various zonal divisions. The social welfare is calculated by Market Coupling algorithm. The analyzed divisions are found by the usage of extended Locational Marginal Prices (LMP) methodology presented in paper [1], which takes into account...
Instytucja wspólności majątku spadkowego, obecnie uregulowana w art. 1035 i 1036 k.c. korzeniami sięga prawa rzymskiego, w którym traktowana była jako jedna z postaci współwłasności w częściach ułamkowych. Tradycja tak unormowanej wspólności, określana również jako romańska, znalazła wyraz w prawie francuskim, a także w innych ustawodawstwach romańskich (np. austriackim). Charakteryzuje się posiadaniem...
Adopting a zonal structure of electricity market requires specification of zones' borders. One of the approaches to identify zones is based on clustering of Locational Marginal Prices (LMP). The purpose of the paper is twofold: (i) we extend the LMP methodology by taking into account variable weather conditions and (ii) we point out some weaknesses of the method and suggest their potential solutions...
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