\u3ci\u3eArcynopteryx Compacta\u3c/i\u3e (Plecoptera: Perlodidae), A Holarctic Stonefly Confirmed From Lake Superior, With a Review and First Checklist of the Stoneflies of Michigan

Arcynopteryx compacta, a northern Holarctic species, is confirmed from Lake Superior along the Keweenaw Peninsula of Michigan\u27s Upper Peninsula. A checklist of stoneflies of Michigan is provided, reporting 58 species plus a list of an additional 19 species that are likely to occur in the state

Range Extension of \u3ci\u3eStylogomphus Albistylus\u3c/i\u3e (Odonata: Gomphidae) for the Upper Peninsula of Michigan

Larvae, exuviae, and teneral adults of Stylogomphus albistylus (Hagen) were collected from Mountain Stream, within the boundaries of the Huron Mountain Club, in the Upper Peninsula of Michigan (Marquette County). This represents the first published report of this species from the Upper Peninsula of Michigan, and only the second recorded site for the state of Michigan

The Brauer-Manin Obstruction and Sha[2].

We discuss the Brauer-Manin obstruction on del Pezzo surfaces of degree 4. We outline a detailed algorithm for computing the obstruction and provide associated programs in magma. This is illustrated with the computation of an example with an irreducible cubic factor in the singular locus of the defining pencil of quadrics (in contrast to previous examples, which had at worst quadratic irreducible factors). We exploit the relationship with the Tate-Shafarevich group to give new types of examples of Sha[2], for families of curves of genus 2 of the form y^2 = f(x), where f(x) is a quintic containing an irreducible cubic factor

Increasing security of supply by the use of a local power controller during large system disturbances

This paper describes intelligent ways in which distributed generation and local loads can be controlled during large system disturbances, using Local Power Controllers. When distributed generation is available, and a system disturbance is detected early enough, the generation can be dispatched, and its output power can be matched as closely as possible to local microgrid demand levels. Priority-based load shedding can be implemented to aid this process. In this state, the local microgrid supports the wider network by relieving the wider network of the micro-grid load. Should grid performance degrade further, the local microgrid can separate itself from the network and maintain power to the most important local loads, re-synchronising to the grid only after more normal performance is regained. Such an intelligent system would be a suitable for hospitals, data centres, or any other industrial facility where there are critical loads. The paper demonstrates the actions of such Local Power Controllers using laboratory experiments at the 10kVA scale

Dissolution and diffusion characteristics of 316L stainless steel in molten zinc containing variable concentrations of aluminum

Molten metal corrosion of pot hardware materials in continuous galvanizing lines is an important factor in maintaining high productivity at steel sheet mills around the world. A complete understanding of the mechanisms which impact the corrosion properties of structural metals submerged in industrial molten zinc baths has not been achieved. Acquisition of deeper knowledge in this field is very difficult because of the numerous variables involved with the zinc environment. As an example, the aluminum content that is employed varies from near 0% aluminum in general (batch) galvanizing pots to around 0.14wt% Al for high-grade automotive sheet steels and again to aluminum levels exceeding 0.2wt% for various construction-grade steels. Moreover, it is widely experienced that the molten metal corrosivity of these small changes in aluminum concentration can have a pronounced impact on the life of submerged galvanizing hardware.;One aspect of understanding the molten zinc corrosion characteristics is determining the solubility of structural hardware metals as a function of changes in aluminum content in the liquid zinc. Hence, an array of tests was performed to measure the actual corrosion loss of 316L stainless steel samples after immersion in molten zinc with aluminum concentrations ranging from about 0% to 1wt% Al. In general, these tests indicated that the corrosion rate of 316L was quite high for pure zinc (0% Al) then decreased drastically at increasing aluminum levels between 0% and about 0.14wt% to a rather minimal corrosion rate beyond 0.14% aluminum, maintaining a low dissolution rate beyond 1% Al. The significance of 0.14wt% Al has been defined by not only the microanalysis of the reaction mechanisms on test samples but also by industry-accepted phase diagrams and previously published research.;Based on the results and procedures characterized by this investigation, it may be possible to further understand the reaction mechanisms and detailed corrosion features of other alloys utilized in industrial galvanizing operations, such as cobalt-based and iron-based superalloys. Furthermore, recognizing the significance of the phase transformations in the region of 0.14wt% aluminum on these advanced alloys may promote more focused research in this economically important aluminum regime

When Are Adult-Child Sexual Encounters Acceptable? Stereotyping and Need for Cognitive Closure

Child sexual abuse is an escalating problem involving both young males and young females. Stories of child sexual abuse and adult-child sexual relationships are on the news almost nightly. One of these most recent cases involved a young girl taken from her own bed, molested, bound, and buried alive - not by a stranger but by her next door neighbor. Perhaps attitudes about this sexual abuse case were based on individuals’ use of stereotypes. Before we can asses how individuals use stereotypes, we must get a basis for how researchers define child sexual abuse

Implications of fault current limitation for electrical distribution networks

This paper explores the potential future need for fault current limitation in the UK's power system, and some of the technical implications of this change. It is estimated that approximately 300-400 distribution substations will require fault current limitation, based on the statistical analysis of the projected fault level "headroom" (or violation). The analysis uses a UK electrical system scenario that satisfies the Government's target for an 80% cut in CO2 emissions by 2050. A case study involving the connection of distributed generation (DG) via a superconducting fault current limiter (SFCL) is used to illustrate the potential protection and control issues. In particular, DG fault ride-through, autoreclosure schemes, and transformer inrush current can be problematic for SFCLs that require a recovery period. The potential solutions to these issues are discussed, such as the use of islanding or automation to reduce the fault level