Phylogenetic systematics of Archembiidae (Embiidina, Insecta)

A cladistic analysis of the American genera of Embiidae is presented, using fifty-seven representative taxa and ninety-four morphological characters. The results support the elevation (and significant re-delimitation) of the sub-family Archembiinae to family level; as delimited here, Archembiidae, revised status, includes the genera Ecuadembia n.gen., Calamoclostes Enderlein, Archembia Ross, Embolyntha Davis, Xiphosembia Ross, Ochrembia Ross, Dolonembia Ross, Conicercembia Ross, Neorhagadochir Ross, Pachylembia Ross, Rhagadochir Enderlein, Litosembia Ross, Navasiella Davis, Ambonembia Ross, Malacosembia Ross, Biguembia Szumik, Gibocercus Szumik and Pararhagadochir Davis. The results also indicate that some genera recently proposed are unjustified and therefore they are synonymized: Argocercembia Ross (a junior synonym of Embolyntha), Brachypterembia Ross (Neorhagadochir), Scelembia Ross (Rhagadochir), Ischnosembia Ross (Ambonembia) and Aphanembia Ross (Biguembia); all new synonymy. The new genus Ecuadembia is described (type species Archembia arida Ross). Ischnosembia surinamensis (Ross) is returned to the genus Pararhagadochir. The following species synonymies are established: Archembia lacombea Ross 1971=Archembia kotzbaueri (Navas 1925), Archembia peruviana Ross 2001=Archembia batesi (MacLachlan 1877), andConicercembia septentrionalis (Mariño&Márquez1988)=Conicercembia tepicensis Ross1984; all new synonymy.The family Archembiidae, and all its constituent genera, are diagnosed and described. The genus Microembia Ross (originally described as an Embiidae) is transferred to Anisembiidae. Pachylembiinae, Scelembiinae, and Microembiinae proposed by Ross are unsupported by the present cladistic analysis.Fil: Szumik, Claudia Adriana. Consejo Nacional de Investigaciones Científicas y Técnicas. Centro Científico Tecnológico - Tucumán. Unidad Ejecutora Lillo; Argentina. Universidad Nacional de Tucumán. Facultad de Ciencias Naturales e Instituto Miguel Lillo. Instituto Superior de Entomología; Argentin

The Role of Evidence in Establishing Trust in Repositories

This article arises from work by the Digital Curation Centre (DCC) Working Group examining mechanisms to roll out audit and certification services for digital repositories in the United Kingdom. Our attempt to develop a program for applying audit and certification processes and tools took as its starting point the RLG-NARA Audit Checklist for Certifying Digital Repositories. Our intention was to appraise critically the checklist and conceive a means of applying its mechanics within a diverse range of repository environments. We were struck by the realization that while a great deal of effort has been invested in determining the characteristics of a 'trusted digital repository', far less effort has concentrated on the ways in which the presence of the attributes can be demonstrated and their qualities measured. With this in mind we sought to explore the role of evidence within the certification process, and to identify examples of the types of evidence (e.g., documentary, observational, and testimonial) that might be desirable during the course of a repository audit.

Online instantaneous and targeted feedback for remote learners

Providing rapid but detailed teaching feedback is a significant problem in distance education, especially for large population courses of short duration, when hand-marking is costly and assignments sent through the postal services cannot be turned round sufficiently quickly. Online assignments with automatic teaching feedback are a possible solution, providing the feedback can be well targeted to individual students. This chapter discusses the online assessment of a ‘maths for science’ course, in which meaningful feedback was given in response to student answers on both summative and purely formative exercises. Students were allowed three attempts at each question, with an increasing amount of teaching feedback being given after each attempt, so encouraging students to engage with the feedback, to learn from it, and to correct their answers if necessary. The mark awarded on the summative assessment reflected the amount of help that had been given. The designers’ concerns included producing a fair test of the course’s learning outcomes within the constraints imposed by the online format and with only minimal use of multiple choice, writing questions that might help to uncover common student misunderstandings coupled with feedback that would address these problems, and tying answer-matching to specific feedback comments. Evidence from statistical analysis of submitted work, and from student responses to questionnaires, has provided insights into the impact of this kind of feedback on the student learning experience. While the majority of students were happy with the online nature of the assessment, a significant proportion appeared to value it more for the immediate indication of their overall performance than for the detailed teaching feedback, and some were put off by the technology or their perception of it. Students were considerably more likely to submit the summative assessment if they had previously engaged online with the practice formative exercises

Analysis of the Caddisflies (Trichoptera) of the Manistee River Watershed, Michigan

We document 134 caddisfly species and their seasonal and habitat affinities based on 93 samples collected from 26 sites throughout the Manistee River watershed in the lower peninsula of Michigan from May through September, 2010. Eleven of these species: Banksiola dossuaria (Say), Cheumatopsyche aphanta Ross, Cheumatopsyche pasella Ross, Hydroptila xera Ross, Ironoquia lyrata (Ross), Lepidostoma vernale (Banks), Neotrichia vibrans Ross, Nyctiophylax affinis (Banks), Oxyethira aeola Ross, Oxyethira rivicola Blickle and Morse, and Polycentropus timesis (Denning) are reported from Michigan for the first time. More than 85% of species reached peak adult abundance during June or July, although a few species reached peak abundance or emerged exclusively during the other months. Overall species richness reached its peak during early July, with a smaller peak of unique species in September. Caddisfly faunas in lakes, small streams, medium rivers, and large rivers were all distinct from each other, suggesting that the overall watershed is following patterns predicted by the River Continuum Concept. It is likely that the Michigan caddisfly fauna contains considerably more species than what is currently known

Heart ventricular histology and microvasculature together with aortic histology and elastic lamellar structure: A comparison of a novel dual-purpose to a broiler chicken line

The use of dual-purpose chickens is a strategy to avoid killing one-day-old male chicks of egg laying lines. Lohmann Dual (LD) is a novel dual-purpose chicken line created by the crossbreeding of layer and broiler lines. However, many of the cardiovascular diseases of broilers are likely to be associated with intensive genetic selection for growth and feed conversion efficiency. This study aimed to compare the macroscopic and microscopic structure of the heart and the aorta of the LD chicken line with that of the broiler chicken line, Ross 308 (Ross) under typical husbandry conditions for meat production. Eighty, one-day-old male chicks of each line were housed for 5 weeks (Ross) and 9 weeks (LD). Six birds of each line were sampled weekly. Heart mass, thickness of ventricular walls, cardiomyocyte size and blood capillary density as well as aortic diameter and thickness, number of elastic lamellae and elastic fiber percentage in the aortic wall were determined. The growth patterns of the heart were the same in the two lines. Although LD chickens had a lower absolute heart mass than that of Ross chickens, the relative heart mass in both lines was similar. The cardiomyocytes of LD chickens were larger than those of Ross’s of the same body weight (BW), nevertheless both lines had similar thicknesses of their ventricular walls. The blood capillary density was greater in the LD heart than in that of the Ross heart. The aorta of LD chickens had proportionally; a greater aortic lumen radius, larger numbers of elastic lamellae and more elastic fibers than in Ross chickens. Our results suggest that the heart and aorta of the LD chickens have not been disadvantaged by their intensive genetic selection; furthermore, LD chickens have a better myocardial capillary supply and better aortic mechanical properties than those of Ross chickens

Comparative Ross Risk Aversion in the Presence of Mean Dependent Risks

This paper studies comparative risk aversion between risk averse agents in the presence of a background risk. Although the literature covers this question extensively, our contribution differs from most of the literature in two respects. First, background risk does not need to be additive or multiplicative. Second, the two risks are not necessary mean independent, and may be conditional expectation increasing or decreasing. We show that our order of cross Ross risk aversion is equivalent to the order of partial risk premium, while our index of decreasing cross Ross risk aversion is equivalent to decreasing partial risk premium. These results generalize the comparative risk aversion model developed by Ross (1981) for mean independent risks. Finally, we show that decreasing cross Ross risk aversion gives rise to the utility function family belonging to the class of n-switch utility functions.Comparative cross Ross risk aversion, Dependent background risk, Partial risk premium, Decreasing cross Ross risk aversion, n-switch utility function

Re-collecting Jim. Discovering a name and a slave narrative's continuing truth

In a follow-up installment in 1839 to the anonymously authored Recollections of Slavery by a Runaway Slave, the narrator testifies that a Charleston slave speculator known as "Major Ross" had sold his brother. The narrator notes that Ross lives in "a nice little white house, on the right hand side of King street as you go in from the country towards the market." The right-hand side? Was that level of precision necessary? Because people challenged the veracity of slave narratives at the time they were published, details mattered very much. But the level of specificity in this instance caught my eye. The facts were borne out: property records in the Charleston County Register Mesne Conveyance Deeds office show that in 1831, a James L. Ross, known also as "Major Ross," purchased a house situated on the west side of King Street, just a few blocks north of the market. If you were entering the city of Charleston from the country, Ross' house would indeed have been on the right-hand side (fig 1). And so it comes down to that. In order to prove his own humanity, the truth about the human capacity for cruelty, and the very reputation of abolitionist crusaders of the American Anti-Slavery Society, this survivor made his story unassailable by giving the correct location for the speculator's house on King Street in Charleston

A note on the Malliavin differentiability of the Heston volatility

We show that the Heston volatility or equivalently the Cox-Ingersoll-Ross process is Malliavin differentiable and give an explicit expression for the derivative. This result assures the applicability of Malliavin calculus in the framework of the Heston stochastic volatility model and the Cox-Ingersoll-Ross model for interest rates.Malliavin calculus, stochastic volatility models, Heston model, Cox-Ingersoll-Ross process

Strathconon, Scatwell and the Mackenzies in the Written Record c. 1463-c.1700

Although some writers have considered the earlier history of Ross, these studies tend to focus on dynastic and political events and not much is know about the internal workings of Ross-shire far less Strathconon in the historical record prior to the end of the fifteenth century.2 Strathconon, strategically situated in central Ross, was the key to the control of the earldom of Ross in that possession of these lands secured control of the few good access routes from coast to coast. The earldom of Ross and the possession thereof in turn was pivotal to the fortunes of the Macdonald Lords of the Isles in the fifteenth century who were fatally undermined by their loss of the area to the Stewart monarchy in 1475. This essay will consider the Strathconon and Scatwell area from the time of its earliest appearance in the historical record at the end of the fifteenth century (at much the same time as the Mackenzie clan themselves) and go on to concentrate on the area in the sixteenth and early seventeenth centuries. An attempt will be made to pull together a variety of written sources in order to try to build up a picture of the area in this period inasmuch as the evidence will allow. These lands, Strathconon and Scatwell, which form the focus of this investigation, were a small part of a much wider (and expanding) estate that was controlled in this period, c.1463 to 1700 by the Mackenzies of Kintail / Seaforth