38 research outputs found
Description of the First Species of Trieces (Hymenoptera: Ichneumonidae) with Tyloids in the Male Antennae and New Records of Neotropical Species
No full textA new species of Trieces Townes from Brazil, Trieces tyloidalis n. sp., is described and illustrated. This is the first known species of Trieces with tyloids in the male antennae. The genus is recorded from Belize, Ecuador and Venezuela for the first time. Trieces horisme Gauld & Sithole, Trieces platysoma Townes, Trieces riodinis Gauld & Sithole and Trieces tuvule Gauld & Sithole, are recorded for the first time from several South American countries. A key to twelve South American species of Trieces is provided.First author received support from the SYNTHESYS project, which is financed by the European Community Research Infrastructure Action
Effect of eprinomectin pour-on treatment around calving on reproduction parameters in adult dairy cows with limited outdoor exposure
No full textThe objective of this study was to investigate if treatment of cows with eprinomectin around calving had any beneficial effects on the calving to first artificial insemination interval, calving to conception interval, and number of services per conception in totally- and semi-confined dairy herds. In totally-confined herds lactating- and dry-cows were housed throughout the summer and had no access to pasture. In semi-confined herds lactating- and dry-cows had limited outdoor exposure to a small pasture or paddock but were still fed a ration that met all their nutritional requirements. The study was carried out between February 2002 and February 2003 in 35 herds (2381 cows) located in Quebec, Ontario and Minnesota (USA) participating in a larger clinical trial. The herds kept electronic reproduction records. Cows were randomly allocated to receive eprinomectin or a placebo, with treatment being administered on or close to the day of calving. Monthly bulk tank milk samples from each farm were tested with an indirect ELISA using a crude Ostertagia ostertagi antigen and these data were averaged over the study year. The optical density ratio (ODR) values were then dichotomized into high and low using a cut-point of 0.50. Treatment effects were analyzed using Cox proportional hazards survival models with herd frailty effects for calving to conception and calving to first service intervals. Aalen's linear hazards model was used to investigate time-varying effects in the Cox models. A random effects poisson regression model was used to model the number of services per conception. Other predictor variables tested in the models were lactation number, calving season, study site, peak milk production, ODR and the lactating- and dry-cow housing variables. Overall, there was no significant effect of treatment on the three indices of reproductive performance. The effect of season of calving depended on how much time had passed since calving. Presumably this effect reflected a seasonal effect at the time of breeding. Hazard of conception in younger cows was higher than in older cows. Early bred cows tended to have a higher number of inseminations per conception than those bred late. The results of the study suggested that eprinomectin treatment at calving was not beneficial to reproduction..RE: 19 ref.; RN: 123997-26-2; SC: 0V; 0I; 0D; 7B; 0H; 0A; CA; BE; PA; VE; ZA; AA; XURL: URL; E-MAILSource type: Electronic(1)[email protected]; http://www.sciencedirect.co./science/journal/01675877; http://upei-resolver.asin-risa.ca?sid=SP:CABI&id=pmid:&id=&issn=0167-5877&isbn=&volume=75&issue=3%2f4&spage=267&pages=267-279&date=2006&title=Preventive%20Veterinary%20Medicine&atitle=Effect%20of%20eprinomectin%20pour-on%20treatment%20around%20calving%20on%20reproduction%20parameters%20in%20adult%20dairy%20cows%20with%20limited%20outdoor%20exposure.&aulast=Sithole&pid=%3Cauthor%3ESithole%2c%20F%3bDohoo%2c%20I%3bLeslie%2c%20K%3bDesCoteaux%2c%20L%3bGodden%2c%20S%3bCampbell%2c%20J%3bKeefe%2c%20G%3bSanchez%2c%20J%3C%2Fauthor%3E%3CAN%3E20063150943%3C%2FAN%3E%3CDT%3EJournal%20article%3C%2FDT%3
Two New Species and New Records of Metopiinae (Hymenoptera, Ichneumonidae) from Ecuador
No full textThe Ecuadorian Metopiinae fauna currently includes 17 species, but recent intensive samplings carried out at Southern Ecuador have increased this number. In the present paper, two new species, Exochus tapiarum sp. nov. and Leurus tapichalacae sp. nov., are described and illustrated. Furthermore, four new records of Metopiinae from Ecuador are provided: Colpotrochia beluga Gauld & Sithole, Exochus famellus Gauld & Sithole, E. izbus Gauld & Sithole, and E. ravetus Gauld & Sithole.This research was supported by the Prometeo Project of Secretaría de Educación Superior, Ciencia, Tecnología e Innovación from Ecuador, and the projects DI-10-FARNR (2017–2019), 19-DI-FARNR-2019, and 08-DI-FARNR-2021 from Universidad Nacional de Loja, Ecuador. Furthermore, layer photographs and revisions of holotypes were done during a research visit made by the first author to the Natural History Museum of London (UK), supported by a Synthesys grant (GB-TAF-TA3-028)
Lookup Table Hough Transform for Real Time Range Image Segmentation and Featureless Co-Registration
No full textThe paper addresses range image segmentation, particularly of data recorded by range cameras, such as the Microsoft Kinect and the Mesa Swissranger SR4000. These devices record range images at video frame rates and allow for acqui-sition of 3-dimensional measurement sequences that can be used for 3D reconstruction of indoor environments from moving platforms. The role of segmentation is twofold. First the necessary image co-registration can be based on cor-responding segments, instead of corresponding point features (which is common practice currently). Secondly, the seg-ments can be used during subsequent object modelling. By realisising that planar regions in disparity images can be modelled as linear functions of the image coordinates, having integer values for both domain and range, the paper in-troduces a lookup table based implementation of local Hough transform, allowing to obtain good segmentation results at high speeds.Geoscience & Remote SensingCivil Engineering and Geoscience
POSITION, LOCATION, PLACE AND AREA: AN INDOOR PERSPECTIVE
No full textOver the last decade, harnessing the commercial potential of smart mobile devices in indoor environments has spurred interest in indoor mapping and navigation. Users experience indoor environments differently. For this reason navigational models have to be designed to adapt to a user’s personality, and to reflect as many cognitive maps as possible. This paper presents an extension of a previously proposed framework. In this extension the notion of placement is accounted for, thereby enabling one aspect of the ‘personalised indoor experience’. In the paper, firstly referential expressions are used as a tool to discuss the different ways of thinking of placement within indoor spaces. Next, placement is expressed in terms of the concept of Position, Location, Place and Area. Finally, the previously proposed framework is extended to include these concepts of placement. An example is provided of the use of the extended framework.
Notable characteristics of the framework are: (1) Sub-spaces, resources and agents can simultaneously possess different types of placement, e.g., a person in a room can have an xyz position and a location defined by the room number. While these entities can simultaneously have different forms of placement, only one is dominant. (2) Sub-spaces, resources and agents are capable of possessing modifiers that alter their access and usage. (3) Sub-spaces inherit the modifiers of the resources or agents contained in them. (4) Unlike conventional navigational models which treat resources and obstacles as different types of entities, in the proposed framework there are only resources and whether a resource is an obstacle is determined by a modifier that determines whether a user can access the resource. The power of the framework is that it blends the geometry and topology of space, the influence of human activity within sub-spaces together with the different notions of placement in a way that is simple and yet very flexible
Moving window segmentation framework for point clouds
No full textAs lidar point clouds become larger streamed processing becomes more attractive. This paper presents a framework for the streamed segmentation of point clouds with the intention of segmenting unstructured point clouds in real-time. The framework is composed of two main components. The first component segments points within a window shifting over the point cloud. The second component stitches the segments within the windows together. In this fashion a point cloud can be streamed through these two components in sequence, thus producing a segmentation. The algorithm has been tested on airborne lidar point cloud and some results of the performance of the framework are presented.Geoscience & Remote SensingCivil Engineering and Geoscience
Generative AI in Accounting Publishing: A Bibliometric and Thematic Analysis of Author Guidelines with Governance and Ethical Considerations
No full textThis study addresses a gap in accounting scholarship by examining how journals listed in the Australian Business Deans Council (ABDC) Journal Quality List approach the use of generative artificial intelligence (AI) tools in scholarly publishing. We employed a two-phase methodology: a structured bibliometric review to map journal characteristics and a thematic content analysis to interpret AI-related author guidelines. Ninety-one A*, A, and B-ranked journals classified under Accounting (FoR 3501) were examined. The findings revealed inconsistent expectations across the discipline due to fragmented journal policies on AI use. This fragmented policy landscape creates ethical ambiguities and challenges for authors, editors, and institutions seeking to ensure responsible and transparent research practices.
To address these gaps, the study proposes a governance-oriented framework for responsible AI use in accounting publishing. The framework includes: (1) standardised disclosure protocols for AI-assisted content, (2) criteria distinguishing acceptable from unacceptable AI applications, (3) procedures for identifying and managing potential misuse, and (4) integration of AI ethics into editorial and peer review practices. By aligning journal policies with principles of transparency, accountability, fairness, and integrity, the framework supports the development of coherent, discipline-specific standards. This research contributes to the advancement of ethical scholarship and informs broader discussions on AI governance in academic and professional contexts
Effect of eprinomectin treatment at calving on milk production in dairy herds with limited outdoor exposure
No full textThe objective of this study was to determine the effect of anthelmintic treatment at calving in herds that were totally or semiconfined during the summer. In totally confined herds, lactating and dry cows were housed throughout the summer and had no access to pasture. In semiconfined herds, lactating and dry cows had limited outdoor exposure to a small pasture or paddock but were still fed a ration that met all their nutritional requirements. The study was carried out between February 2002 and February 2003 in 65 herds enrolled with DHI and distributed in 4 regions in Canada and 1 state in the United States. Cows were randomly allocated to receive eprinomectin or a placebo, with treatment being administered on or close to day of calving. In May and June 2002, 8 faecal samples were collected from each farm and faecal egg counts (FEC) were determined. Monthly bulk tank milk samples from each farm were tested with an indirect ELISA using a crude Ostertagia ostertagi antigen. Monthly test-day milk production data were recorded for 200 d after calving. In general, FEC were very low (mean=1 egg per gram, range=0 to 27). Mean herd bulk milk ELISA optical density ratio (ODR) values for the whole year ranged between 0.22 and 0.80. The ODR values were dichotomized into high and low using a threshold of 0.5. Treatment effects were analysed using a linear mixed model with herd and cow as random effects. The analysis was restricted to 4789 cows (23 956 test-day records) treated between 21 d before and 7 d after calving. Overall, there was no significant effect of treatment. However, there was a tendency for an interaction between treatment and ODR, as illustrated by a larger numerical difference in treated vs. untreated cows in high-ODR herds than in low-ODR herds. However, the confidence intervals for the treatment effects (kg/d of milk per cow) in high-ODR herds (-0.33 to 1.10) and in low-ODR herds (-0.53 to 0.14) were wide and included zero. Therefore, this study failed to show a beneficial effect of eprinomectin treatment in these totally or semiconfined herds
