36 research outputs found
Zooplankton of Western Lake Erie at Put-In-Bay: A Quantitative Study, April 1973 - March 1974
No full textAuthor Institution: Center for Lake Erie Area Research, The Ohio State UniversityREUTTER, VERONICA M. AND JEFFREY M. REUTTER. Zooplankton of western Lake Erie at Put-in-Bay: a quantative study, April 1973-March 1974. Ohio J. Sci. 75(5): 256, 1975
Effect of the Degree of the Gate‐Dielectric Surface Roughness on the Performance of Bottom‐Gate Organic Thin‐Film Transistors
No full textIn organic thin‐film transistors (TFTs) fabricated in the inverted (bottom‐gate) device structure, the surface roughness of the gate dielectric onto which the organic‐semiconductor layer is deposited is expected to have a significant effect on the TFT characteristics. To quantitatively evaluate this effect, a method to tune the surface roughness of a gate dielectric consisting of a thin layer of aluminum oxide and an alkylphosphonic acid self‐assembled monolayer over a wide range by controlling a single process parameter, namely the substrate temperature during the deposition of the aluminum gate electrodes, is developed. All other process parameters remain constant in the experiments, so that any differences observed in the TFT performance can be confidently ascribed to effects related to the difference in the gate‐dielectric surface roughness. It is found that an increase in surface roughness leads to a significant decrease in the effective charge‐carrier mobility and an increase in the subthreshold swing. It is shown that a larger gate‐dielectric surface roughness leads to a larger density of grain boundaries in the semiconductor layer, which in turn produces a larger density of localized trap states in the semiconductor
A European union and Canadian review of public health nursing preparation and practice.
No full textThis study explores the preparation and role of the public health nurse (PHN) across European Union (EU) countries (Finland, Sweden, and the United Kingdom) and Canadian provinces (Alberta, New Brunswick, and Prince Edward Island)
Yunis-Varon Syndrome is caused by mutations in FIG4, encoding a phosphoinositide phosphatase
No full textYunis-Varón syndrome (YVS) is an autosomal-recessive disorder with cleidocranial dysplasia, digital anomalies, and severe neurological involvement. Enlarged vacuoles are found in neurons, muscle, and cartilage. By whole-exome sequencing, we identified frameshift and missense mutations of FIG4 in affected individuals from three unrelated families. FIG4 encodes a phosphoinositide phosphatase required for regulation of PI(3,5)P(2) levels, and thus endosomal trafficking and autophagy. In a functional assay, both missense substitutions failed to correct the vacuolar phenotype of Fig4-null mouse fibroblasts. Homozygous Fig4-null mice exhibit features of YVS, including neurodegeneration and enlarged vacuoles in neurons. We demonstrate that Fig4-null mice also have small skeletons with reduced trabecular bone volume and cortical thickness and that cultured osteoblasts accumulate large vacuoles. Our findings demonstrate that homozygosity or compound heterozygosity for null mutations of FIG4 is responsible for YVS, the most severe known human phenotype caused by defective phosphoinositide metabolism. In contrast, in Charcot-Marie-Tooth disease type 4J (also caused by FIG4 mutations), one of the FIG4 alleles is hypomorphic and disease is limited to the peripheral nervous system. This genotype-phenotype correlation demonstrates that absence of FIG4 activity leads to central nervous system dysfunction and extensive skeletal anomalies. Our results describe a role for PI(3,5)P(2) signaling in skeletal development and maintenance.Philippe M. Campeau, Guy M. Lenk, James T. Lu, Yangjin Bae, Lindsay Burrage, Peter Turnpenny, Jorge Román Corona-Rivera, Lucia Morandi, Marina Mora, Heiko Reutter, Anneke T. Vulto-van Silfhout, Laurence Faivre, Eric Haan, Richard A. Gibbs, Miriam H. Meisler, and Brendan H. Le
Cytochrome b haplotype divergences in West European Apodemus
No full textInternational audienceSequencing of the cytochrome b mitochondrial gene (732 base pairs) in samples of Apodemus sylvaticus from Central Europe (eastern France, Switzerland, southern Germany and western Austria) revealed significant molecular variation not reflected in previous morphological and genetic studies of this species. A comparison with the sequences (150 bp) of 54 specimens available from GenBank (NCBI) showed that two problematic individuals originating from southern Germany have to be assigned to A. fulvipectus, a species not yet known in western Europe. A. sylvaticus specimens (n = 14) sampled north of the Alps exhibited a maximum intraspecific sequence divergence of about 5.1%, whereas the maximum divergence is much lower in A. flavicollis (1%, n = 5) and in A. alpicola (0.5%, n = 4), although the samples originate from a similar geographic range of about 350 km. We also found a high rate of erroneously assigned specimens in GenBank, which indicates that the discrimination of Apodemus species remains a problem and requires further investigations
Moving Sustainability Forward: A Game-based Approach For Building Confidence In Municipal Administration
No full textabstract: Cities with a car-oriented mobility system are significant consumers of energy and require drastic transformations in their structure and function to minimize their harmful impacts on environment and people and to achieve sustainability goals. To promote such sustainable transformations, municipal administrators need to act as change-agents. Because municipal governments are often not agile organizations, they tend toward incrementalism even in the pursuit of transformational goals. Therefore, there is a need in municipal governments to build individual transformative capacity so that municipal administrators can design, test, and implement plans, projects, and policies that are capable of transforming cities toward sustainability. This research presents a game-based workshop, “Stadt-liche Ziele” (AudaCity), that uses a backcasting approach to make municipal administrators build a sustainability strategy. I conducted a pilot study to test the effects of the game on municipal administrators’ confidence in their own ability and power to implement sustainability actions, a key determinant of transformative capacity. Five municipal administrators from Lüneburg, Germany, working on mobility issues, participated in a three-hour-workshop playing the game. Interviews and questionnaires were used before and after the workshop and participants’ contributions during the event were recorded to explore collective changes in confidence. Results indicate that the game increased participant confidence by rewarding collective success, breaking down an ambitious goal into achievable tasks, and acknowledging how administrators’ current actions already contribute to the goal
A type theory for strictly unital infinity ∞-categories
No full textWe use type-theoretic techniques to present an algebraic theory of ∞-categories with strict units. Starting with a known type-theoretic presentation of fully weak ∞-categories, in which terms denote valid operations, we extend the theory with a non-trivial definitional equality. This forces some operations to coincide strictly in any model, yielding the strict unit behaviour. We make a detailed investigation of the meta-theoretic properties of this theory. We give a reduction relation that generates definitional equality, and prove that it is confluent and terminating, thus yielding the first decision procedure for equality in a strictly-unital setting. Moreover, we show that our definitional equality relation identifies all terms in a disc context, providing a point comparison with a previously proposed definition of strictly unital ∞-category. We also prove a conservativity result, showing that every operation of the strictly unital theory indeed arises from a valid operation in the fully weak theory. From this, we infer that strict unitality is a property of an ∞-category rather than additional structure
A Type Theory for Strictly Unital -Categories
No full textWe use type-theoretic techniques to present an algebraic theory of
-categories with strict units. Starting with a known type-theoretic
presentation of fully weak -categories, in which terms denote valid
operations, we extend the theory with a non-trivial definitional equality. This
forces some operations to coincide strictly in any model, yielding the strict
unit behaviour.
We make a detailed investigation of the meta-theoretic properties of this
theory. We give a reduction relation that generates definitional equality, and
prove that it is confluent and terminating, thus yielding the first decision
procedure for equality in a strictly-unital setting. Moreover, we show that our
definitional equality relation identifies all terms in a disc context,
providing a point comparison with a previously proposed definition of strictly
unital -category. We also prove a conservativity result, showing that
every operation of the strictly unital theory indeed arises from a valid
operation in the fully weak theory. From this, we infer that strict unitality
is a property of an -category rather than additional structure.Comment: 46 page
a review of Computads for weak ω-categories as an inductive type by Dean Christopher J.; Finster Eric; Markakis Ioannis; Reutter David; Vicary Jamie
No full textreview articl
Histological studies on the origin of planulae of the coral Pocillopora damicornis
No full textThe coral Pocillopora damicornis develops gonads and releases planulae on a lunar cycle throughout most of its range. Planulae of P. damicornis in some populations display the same allozyme pattern as their mother colonies, suggesting that planulae might be produced asexually. To investigate the origin of planulae in this coral, histological studies on maturation of oocytes and early development of planulae were performed on P. damicornis in Okinawa, Japan. Small branches 3 to 5 cm long were sampled for histological observation from 7 colonies every day from August 24 to 30 and September 26 to 30, 1997. Blastula- and gastrula-like stages were observed for the first time in P. darnicornis. Blastula-like embryos consisted of a poorly defined cellular cover over an indistinct yolky mass, and were approximately the same size as mature oocytes, ca 100 pm in diameter. Oocytes occurred in 2 size classes, small (50 pm). A continuous series of planula developmental stages from blastulae to planulae was documented. The appearance of early embryos and small plandae occurred about the time that large oocytes disappeared. These observations, together with a lack of any sign of production of planulae by budding, strongly suggest that planulae of P. damicornis in this population are derived from oocytes that undergo typical embryogenesis
