Studies of Neotropical caddisflies, XII: Rhyacophilidae, Glossosomatidae, Philopotamidae, and Psychomyiidae from the Amazon Basin (Trichoptera)

Based primarily on colleçtions of FITTKAU and MARLIER, adults of the Amazonian species in four families of Trichoptera are described and figured. Keys are provided to the Latin American families (except those exclusively Chilean), potentially Amazonian genera, and described species. Fifty-five species (of which 52 are described as new) are placed in the genera: Atopsyche (1 species), Antoptila (1 species), Protoptila (10 species), Wormaldia (1 species), Dolophilodes (1 species), Chimarra (8 species), Polyplectropus (4 species), Nyctiophylar (1 species), Cyrnellus (7 species), and Cernotína (21 species)

Studies of Neotropical caddisflies. XXII: Hydropsychidae of the Amazon Basin (Trichoptera)

The second part of the taxonomic inventory of the Trichoptera of the Amazon Basin treats the family Hydropsychidae. Keys are provided to nine genera known or expected to occur in the area. The species of each genus are are keyed, figured, and their distribution given. Forty-nine species (of which thirteen are new) are placed in the genera: Smicridea (16 species), Leptonema (7 species), Neoleptonema (1 species), Macronema (18 species), Centromacronema (no species), Pseudomacronema (1 species), Plectromacronema (1 species), Blepharopus (1 species), and Synoestropsis (4 species). Several synonymies are made in the genera Leptonema, Macronema, and Blepharopus

Measuring Monsters, Academic Subjectivities, and Counting Practices

In this paper, we explore the online academic research platforms we are entangled with as tenure-track faculty members in the neoliberal university. We are so embedded in these systems that the assumptions and constructions inherent in practices of counting are often lost, wrapped in the coils of counting practices—a becoming with algorithm. Though academic platforms are intricately enmeshed in our research and lives, they have been operating as “onto-epistemological blind spots” (Sweet et al., 2020, p. 2). And yet, the numbers they produce and rely on (H-scores, impact factors, citation counts, and journal rankings) matter and are “promiscuous and inventive in [their] agential wanderings” (Barad, 2015, p. 487), offering possibilities for intimacy and response-ability to what we are and might become. In other words, attending to the monstrous qualities of counting practices offers an entry point for re-thinking the relational, ethical, and affective aspects of academic subjectivity. So, we attend tothese qualities to become with the neoliberal counting and control mechanisms in innovative ways. Through this paper, we open ourselves to the wild possibilities of academic algorithms, working within and thinking with counting practices to intimately understand the ontologies of number at work in these platforms and how they work on our subjectivities. As we consider how our futures are being modelled and pre-empted, we think the algorithms in relation to feminist new materialist philosophers, Rosi Braidotti and Karen Barad. We ask: ‘what if?’ we were to think ontologies of number with these theories and see what possibilities emerge. We entangle Braidotti and  Barad with Deleuzoguattarian philosophies to imagine different relational becomings; to construct new ways of attending to our monstrous potentials and possibilities

An experimental investigation of the flow physics of high-lift systems

This progress report, a series of viewgraphs, outlines experiments on the flow physics of confluent boundary layers for high lift systems. The design objective is to design high lift systems with improved C(sub Lmax) for landing approach and improved take-off L/D and simultaneously reduce acquisition and maintenance costs. In effect, achieve improved performance with simpler designs. The research objectives include: establish the role of confluent boundary layer flow physics in high-lift production; contrast confluent boundary layer structure for optimum and non-optimum C(sub L) cases; formation of a high quality, detailed archival data base for CFD/modeling; and examination of the role of relaminarization and streamline curvature

An experimental investigation of the flow physics of high-lift systems

This progress report is a series of overviews outlining experiments on the flow physics of confluent boundary layers for high-lift systems. The research objectives include establishing the role of confluent boundary layer flow physics in high-lift production; contrasting confluent boundary layer structures for optimum and non-optimum C(sub L) cases; forming a high quality, detailed archival data base for CFD/modelling; and examining the role of relaminarization and streamline curvature. Goals of this research include completing LDV study of an optimum C(sub L) case; performing detailed LDV confluent boundary layer surveys for multiple non-optimum C(sub L) cases; obtaining skin friction distributions for both optimum and non-optimum C(sub L) cases for scaling purposes; data analysis and inner and outer variable scaling; setting-up and performing relaminarization experiments; and a final report establishing the role of leading edge confluent boundary layer flow physics on high-lift performance

Documentation and Control of Flow Separation on a Low Pressure Turbine Linear Cascade of Pak-B Blades Using Plasma Actuators

This work involved the documentation and control of flow separation that occurs over low pressure turbine (LPT) blades at low Reynolds numbers. A specially constructed linear cascade was utilized to study the flow field over a generic LPT cascade consisting of Pratt & Whitney "Pak-B" shaped blades. Flow visualization, surface pressure measurements, LDV measurements, and hot-wire anemometry were conducted to examine the flow fields with and without separation control. Experimental conditions were chosen to give a range of chord Reynolds numbers (based on axial chord and inlet velocity) from 10,000 to 100,000, and a range of freestream turbulence intensities from u'/U(infinity) = 0.08 to 2.85 percent. The blade pressure distributions were measured and used to identify the region of separation that depends on Reynolds number and the turbulence intensity. Separation control was performed using dielectric barrier discharge (DBD) plasma actuators. Both steady and unsteady actuation were implemented and found to work well. The comparison between the steady and unsteady actuators showed that the unsteady actuators worked better than the steady ones. For the steady actuators, it was found that the separated region is significantly reduced. For the unsteady actuators, where the signal was pulsed, the separation was eliminated. The total pressure losses (a low Reynolds number) was reduced by approximately a factor of two. It was also found that lowest plasma duty cycle (10 percent in this work) was as effective as the highest plasma duty cycle (50 percent in this work). The mechanisms of the steady and unsteady plasma actuators were studied. It was suggested by the experimental results that the mechanism for the steady actuators is turbulence tripping, while the mechanism for the unsteady actuators is to generate a train of spanwise structures that promote mixing

Шляхи підвищення ефективності фінансово-господарської діяльності підприємства

Мета даної статті полягає в необхідності виробити заходи з підвищення ефективності фінансово-господарської діяльності підприємства (на прикладі Кримського республіканського підприємства «Виробниче підприємство водопровідно-каналізаційної галузі» м. Сімферополя)

Effects of two-stage weaning duration on beef cattle growth and vocalization

https://scholarworks.moreheadstate.edu/student_scholarship_posters/1046/thumbnail.jp