Ovarian growth and ovulation in the mature blue crab, Callinectes sapidus Rathbun

Introduction. Observations: structure of the ovary during the periods of growth and ovulation in the mature crab (stages 1-5). Discussion and conclusions

Laser wavelength selector and output coupler

Optical system eliminates displacement occurring when wavelengths are selected in multiple wavelength laser utilizing intracavity wavelength selection by first-order Littrow reflection of plane grating. Output coupling varies direction of output beam as different wavelengths are selected by grating rotation

Network of Australiasian Tertiary Associations: a space for discussion, collaboration and advocacy in tertiary education

This presentation explores the development of a network focused on enhancing network leadership in tertiary education associations. The Network of Australasian Tertiary Associations (NATA) is an Office for Learning and Teaching (OLT) project that aims at facilitating a sustainable collaborative network between established higher education associations. NATA provides a space for discussion, action and advocacy on key issues pertinent to the Australasian tertiary environment. Members of NATA comprise Australasian Society for Computers in Learning in Tertiary Education (ascilite), Australasian Council on Open, Distance and e-learning (ACODE), The Higher Education Research and Development Society of Australasia, (HERDSA), The Council of Australian Directors of Academic Development, (CADAD), Open and Distance Learning Association of Australia (ODLAA), Australian Academic and Research Network (AARNet) and Netspot. Networks are important hubs for the development of new ideas and are discussion and dissemination spaces for individuals and communities. The project is now focused on progressing achieving the NATA's key objectives through three strategic activities. These comprise: ● Disseminating the ALTC Good Practice Reports through the development of asynchronous 'E' Resources, completed in partnership with report authors ● Conducting research into the network and network leadership through interviews, focus groups and surveys ● Supporting partner associations to engage in small-scale projects aligned with the key objectives of both the NATA and their association to provide value to the sector and strengthen communication and engagement of NATA partners. Through the creation of collaborative connected spaces for discourse and action, the NATA aspires to develop a model that will influence policy, research and learning and teaching in the Australasian tertiary environment

Vier Seltenheiten in der Osnabrücker Stadtflora: Atriplex nitens, Salsola ruthenica, Parietaria officinalis, Eragrostis tef

Es werden vier Neufunde und andere interessante Vorkommen von Ruderalpflanzen im Stadtgebiet von Osnabrück beschrieben: Atriplex nitens in Chenopodietalia- und Sisymbrion-Gesellschaften einer Inertstoffdeponie; Salsola ruthenica in herbizidbeeinflußten Sisymbrion-, Convolvulo-Agropyrion- und Polygono-Poetalia-Gesellschaften auf Grus bzw. Kies und Sand im Bundesbahngelände; Parietaria officinalis im Aegopodion eines zeitweise verwilderten Gartens der gründerzeitlichen Weststadt; Eragrostis tef in einer "Wildkräuter"-Ansaat im Innenstadtbereich. Die Vorkommen werden soziologisch beschrieben, ökologisch interpretiert sowie mit den heutigen und den ehemaligen Flächennutzungen in Beziehung gesetzt

Kleinschmielenrasen im Stadtgebiet : Entstehung und Bewertung am Beispiel von Osnabrück ; mit 2 Tabellen

Es werden mehrere Thero-Airion-Gesellschaften (Nelkenschmielenrasen) auf städtischen und industriellen Wuchsorten beschrieben. Sie enthalten eine Reihe von Arten, die als "selten" bzw. "gefährdet" gelten ("Rote-Listen-Arten"). Die Wuchsorte sind seit etwa 10 Jahren entstanden, und zwar als nicht-intendierte Nebeneffekte normaler städtischer und industrieller Flächennutzungen und Umnutzungen. Die Entstehung wird an einigen exemplarischen Fällen im einzelnen dokumentiert. Die Gründe für die Entstehung sind z. B.: Bauarbeiten, Abschieben des Oberbodens und andere Planierungen, überhaupt Vernichtung der spontanen Vegetation (auch durch Herbizide), Mißlingen von (Re)kultivierungen oder auch (z. B. bei Zier- und Parkrasen) Störungen durch Pflege und Kaninchenweide. Nehmen die Störungen stark ab, werden die Thero-Airlon-Gesellschaften durch ruderale Wiesen und andere ruderale und halbruderale Geseäschaften ersetzt. Die Bewertung solcher Vorkommen aufgrund sogenannter Roter Listen wird in Frage gestellt bzw. differenziert und eine Leitlinie für sinnvollen Naturschutz in Stadt- und Industriegebieten formuliert.The paper describes several associations of the Thero-Airion on urban and industrial sites. They contain several spscies which are members of the so-caüed red lists of rare and endangered species. The stands developped during the last decade as unintended consequences ("side effects") of ordinary urban and industrialland uses and land use changes. The genesis of the stands is documented, and the causes of their formation and their temporary" stability are discussed. The empirical results are used to criticize the application of red lists to urban and industrial vegetation; finally, a basic principle for nature conservation in urban and industrial spaces is proposed

Matrix Recipes for Hard Thresholding Methods

In this paper, we present and analyze a new set of low-rank recovery algorithms for linear inverse problems within the class of hard thresholding methods. We provide strategies on how to set up these algorithms via basic ingredients for different configurations to achieve complexity vs. accuracy tradeoffs. Moreover, we study acceleration schemes via memory-based techniques and randomized, $\epsilon$-approximate matrix projections to decrease the computational costs in the recovery process. For most of the configurations, we present theoretical analysis that guarantees convergence under mild problem conditions. Simulation results demonstrate notable performance improvements as compared to state-of-the-art algorithms both in terms of reconstruction accuracy and computational complexity.Comment: 26 page

Tropospheric HO2 determination by FAGE

The detection efficiency is greatest at low pressures, where the subsequent removal of the HO product by the NO reagent (via HO + NO + M yields HONO + M) is relatively slow. Moreover, nozzle expansion of the air from ambient to low pressures produces a turbulent zone that assists in mixing the reagent with the sample. If the HO product is observed by laser-excited fluorescence, then the other advantages of low-pressure detection by FAGE (Fluorescence Assay with Gas Expansion) also apply. The FAGE instrumental response was calibrated to external HO2 by observing NO decay in the photolysis of HO-CH2O mixtures and by choosing conditions in which HO2 + NO is the only significant NO destruction path. HO2 was determined in urban air

Jet-hadron correlations in STAR

Advancements in full jet reconstruction have made it possible to use jets as triggers in azimuthal angular correlations to study the modification of hard-scattered partons in the medium created in ultrarelativistic heavy-ion collisions. This increases the range of parton energies accessible in these analyses and improves the signal-to-background ratio compared to dihadron correlations. Results of a systematic study of jet-hadron correlations in central Au-Au collisions at sqrt(s_NN) = 200 GeV are indicative of a broadening and softening of jets which interact with the medium. Furthermore, jet-hadron correlations suggest that the suppression of the associated hadron yield at high-pT is balanced in large part by low-pT enhancement.Comment: 4 pages, 2 figures, proceedings for Quark Matter 201