Linear Programming-Based Power Management for a Multi-Feeder Ultra-Fast DC Charging Station

The growing number of electric vehicles (EVs) affects the national electricity system in terms of power demand and load variation. Turning our attention to Italy, the number of vehicles on the road is 39 million; this represents a major challenge, as they will need to be recharged constantly when the transition to electric technology is complete. If we consider that the average power is 55 GW and the installed system can produce 120 GW of peak power, we can calculate that with only 5% of vehicles in recharging mode, the power demand increases to 126 GW, which is approximately 140% of installed power. The integration of renewable energy sources will help the grid, but this solution is less useful for handling large load variations that negatively affect the grid. In addition, some vehicles committed to public utility must have a reduced stop time and can be considered to have higher priority. The introduction of priorities implies that the power absorption limit cannot be easily introduced by limiting the number of charging vehicles, but rather by computing the power flow that respects constraints and integrates renewable and local storage power contributions. The problem formulated in this manner does not have a unique solution; in this study, the linear programming method is used to optimise renewable resources, local storage, and EVs to mitigate their effects on the grid. Simulations are performed to verify the proposed method

The Myxomycetes of Athens Conty, Ohio

Author Institution: Department of Environmental and Plant BiologyThe goal of this study was to document all reported collections of myxomycetes (slime molds) from Athens County, OH (USA). The compilation of several published and unpublished studies of myxomycete records from Athens County resulted in a total of 52 species. The species were distributed among 6 orders, 9 families, and 25 genera and represent 24% of the myxomycetes known from Ohio and approximately 15% of those recorded for North America. No new collections for the state of Ohio were reported

Determination of inorganic phosphorus in serum: Evaluation of three methods applied to the Technicon RA-1000 analyzer

We have evaluated three analytical methods for determining inorganic phosphorus in serum applied to the Technicon RA-I000 analyzer: a fully enzymatic colorimetric method based on the specific system purine nucleoside phosphorylase/xanthine oxidase coupled to an indicator colorimetric reaction similar to the Trinder reaction; a chemical method involving the direct UV measurement of the phosphomolybdate complex; and a chemical method with reduction of the phosphomolybdate complex to molybdenum blue. Experiments were performed to assess within-run and between-day precision, linearity, interference and correlation. The best performance characteristics were shown by the enzymatic colorimetric method and the phosphomolybdate UV method

Some Preliminary Statistical, Qualitative, and Anecdotal Findings of an Empirical Study of Collegiality among Law Professors

In advance of a sophisticated analysis of the survey data, one must be very careful in drawing any overall conclusions about the state of collegiality and workplace well-being in legal academia. Certainly, no correlative assertions can be made. Nevertheless, this preliminary review has revealed some noteworthy information. Certainly, law faculties are far from perfectly collegial associations, and many if not most law professors have a gripe of one sort or another. Despite these facts, however, the overwhelming majority of faculty members appear to be happy with their choice of career. The qualitative data also leaves one with the impression that, overall, baseline collegiality is the norm at most law schools. However, more exceptions to this norm occur than most of us would find acceptable. In many instances, the source of uncollegial conduct is primarily the result of a few difficult personalities on any given faculty. Beyond that, some faculties appear to encounter friction along either status (non-tenure track versus tenure track) or political (conservative versus liberal; majority versus minority; male versus female) lines. Upon reflection, neither of these fault lines should come as a surprise, given the egos of the individuals smart and successful enough to obtain a position in legal academia, the close relationship between law and politics, and the passionate political views held by many law faculty

Measuring the Value of Collegiality Among Law Professors

This article is the last in a trilogy addressing the issue of collegiality among law In the first piece, titled On Collegiality, author Seigel defined professors\u27 collegiality and suggested that most law schools have at least one, if not two or three, affirmatively uncollegial members of their faculty. Seigel posited that these individuals tend to interfere with the ideal functioning of their institutions by negatively affecting the well-being of their peers. Some readers of On Collegiality questioned the legitimacy of Seigel\u27s cost-benefit analysis. Specifically, they commented that some of the factors Seigel used in his analysis could be empirically measured. In response, the present authors teamed up to conduct an empirical study of collegiality

Some Preliminary Statistical, Qualitative, and Anecdotal Findings of an Empirical Study of Collegiality among Law Professors

In advance of a sophisticated analysis of the survey data, one must be very careful in drawing any overall conclusions about the state of collegiality and workplace well-being in legal academia. Certainly, no correlative assertions can be made. Nevertheless, this preliminary review has revealed some noteworthy information. Certainly, law faculties are far from perfectly collegial associations, and many if not most law professors have a gripe of one sort or another. Despite these facts, however, the overwhelming majority of faculty members appear to be happy with their choice of career. The qualitative data also leaves one with the impression that, overall, baseline collegiality is the norm at most law schools. However, more exceptions to this norm occur than most of us would find acceptable. In many instances, the source of uncollegial conduct is primarily the result of a few difficult personalities on any given faculty. Beyond that, some faculties appear to encounter friction along either status (non-tenure track versus tenure track) or political (conservative versus liberal; majority versus minority; male versus female) lines. Upon reflection, neither of these fault lines should come as a surprise, given the egos of the individuals smart and successful enough to obtain a position in legal academia, the close relationship between law and politics, and the passionate political views held by many law faculty

Reply to Comment on: Hawking radiation from ultrashort laser pulse filaments

A comment by R. Schutzhold et al. raises possible concerns and questions regarding recent measurements of analogue Hawking radiation. We briefly reply to the opinions expressed in the comment and sustain that the origin of the radiation may be understood in terms of Hawking emission

Fault-Tolerant Torque Control Based on Common and Differential Mode Modeling for Multi-Three-Phase Induction Machines

Among the multiphase solutions, multi-three-phase drives are experiencing significant industrial development since they can be configured as multiple three-phase units operating in parallel. The literature reports several control approaches to perform the torque regulation of multi-three-phase machines. Most of such solutions use the vector space decomposition (VSD) approach since it allows the control of a multi-three-phase machine using the conventional control schemes of three-phase drives, reducing the complexity of the control algorithm. However, this advantage is practically lost in the case of open-three-phase faults. Indeed, the post-fault operation of the VSD-based drive schemes requires the implementation of additional control modules, often specifically designed for the machine under consideration. Therefore, this paper aims at proposing a novel control approach that allows using any control scheme developed for three-phase motors to perform the torque regulation of a multi-three-phase machine both in healthy and faulty operation. In this way, the previously mentioned drawbacks of the VSD-based control schemes in dealing with the machine's faulty operation are avoided. Moreover, the simplicity of the control algorithm is always preserved regardless of the machine operating condition. The proposed solution has been experimentally validated through a 12-phase induction motor, rated 10 kW at 6000 r/min, which uses a quadruple-three-phase configuration of the stator winding