208 research outputs found
Family Rhopaliidae Looss, 1899
Members of the family Rhopaliidae Looss, 1899 include digenetic trematodes that are parasites of marsupials in the Nearctic and Neotropical regions. These forms are characterized by having two anteriorly directed proboscides armed with spines and situated bilaterally relative to the oral sucker. The family was first established by Looss (1899) as the Rhopaliadae. Braun (1901b) incorrectly spelled the subfamily name as Rhopaliadinae. These trematodes were further studied and redescribed by Fuhrmann (1928) and Bresslau (1932), while Pratt (1902) appears to have been the first to consider the group to be related to the schinostomes. Viana (1924) emended the spelling of the family name to Rhopaliidae, which Skrjabin (1948c) considered a synonym of the Rhopaliadae. The spelling Rhopaliasidae was used by Yamaguti (1958). Travassos et al. (1969) established the subfamily Rhopaliasinae, and Yamaguti (1971) synonymized the Rhopaliasidae with the Rhopaliidae. The name Rhopalias was established by Stiles & Hassall (1898) to replace Rhopalophorus Diesing, 1850, which was pre-occupied by Ropalophorus Westwood, 1840 (Hymenoptera), with Distomum coronation Rudolphi, 1819 as the type-species. Rhopalophorus is synonymous with Rhopalias Stiles & Hassall, 1898. Lutz (1895) used the name Rhopalocephalus, without citing a taxon authority, in conjunction with the species names R. coronatus (Rudolphi, 1819) and R. horridus (Diesing, 1850). Stiles & Hassall (1898) did not mention Rhopalocephalus and, presumably, were unaware of it. It does not appear to have been used by other authors. Although Rhopalocephala is the older name, Rhopalias is well established in the literature and we intend to petition the ICZN to declare Rhopalocepbalus a nomen oblitum. The primary distinguishing morphological character of Rhopalias is the possession of a pair of proboscides, armed with chitinous spines, which can be invaginated into a muscular pouch. The pouches open to the exterior on each side of the oral sucker. They are about 0.3 mm long, with protrusor and retractor muscle fibres. The number and arrangement of spines on the proboscides are diagnostic at species level. Among the species, the proboscides range from fairly short \u3c0.26 mm) with 7-8 spines, in R. baculiler Braun, 1900, medium in length \u3c0.32 mm) with many spines, in R. horridus (Diesing, 1850), or medium with ten spines in a dorsal and a ventral group of five spines each, in R. macracantbus Chandler, 1932 or, finally, very long \u3c1.3mm) with ten spines each in R. coronatus (Rudolphi, 1819)
Effect of dietary coconut oil supplementation on some blood biochemical indices in yearling rams
The research set out to examine how adding coconut oil to the diet of yearling rams affected a number ofclinically significant biochemical variables in their blood. The experiment used nine male Blackhead Plevenyearling rams, with an average starting weight of 45.2 kg. A two-period experimental design was used. Thefirst group of yearling rams were given 1 kilogram of barley and 1 kg of grass hay (ration I) during the firstperiod. The second group got 0.800 kg of barley, 0.200 kg of sunflower meal, and 1 kg of grass hay (rationII). The third group also received 0.800 kg of barley, 0.200 kg of sunflower expeller, and 1 kg of grass hay(rating III). As part of the morning feeding routine throughout the trial, all groups received 0.02 kg ofcoconut oil via cannulas. Including coconut oil in ration II led to higher blood total and HDL cholesterol 2.5hours after consumption (p<0.001). Despite the increased rumen lipid content, serum triglyceride levels inanimals given Rations I and II were unaffected. Coconut oil significantly reduced blood ASAT activity inall three diets, both before and after feeding (p<0.05 and p<0.001, respectively). Animals given ration II hada reduction in serum alkaline phosphatase both before (p<0.001) and after feeding (p<0.05) after the additionof coconut oil. 
Twigraph: Discovering and Visualizing Influential Words between Twitter Profiles
The social media craze is on an ever increasing spree, and people are
connected with each other like never before, but these vast connections are
visually unexplored. We propose a methodology Twigraph to explore the
connections between persons using their Twitter profiles. First, we propose a
hybrid approach of recommending social media profiles, articles, and
advertisements to a user.The profiles are recommended based on the similarity
score between the user profile, and profile under evaluation. The similarity
between a set of profiles is investigated by finding the top influential words
thus causing a high similarity through an Influence Term Metric for each word.
Then, we group profiles of various domains such as politics, sports, and
entertainment based on the similarity score through a novel clustering
algorithm. The connectivity between profiles is envisaged using word graphs
that help in finding the words that connect a set of profiles and the profiles
that are connected to a word. Finally, we analyze the top influential words
over a set of profiles through clustering by finding the similarity of that
profiles enabling to break down a Twitter profile with a lot of followers to
fine level word connections using word graphs. The proposed method was
implemented on datasets comprising 1.1 M Tweets obtained from Twitter.
Experimental results show that the resultant influential words were highly
representative of the relationship between two profiles or a set of profile
Advanced Models and Algorithms for Self–Similar IP Network Traffic Simulation and Performance Analysis
The paper examines self-similar (or fractal) properties of real communication network traffic data over a wide range of time scales. These self-similar properties are very different from the properties of traditional models based on Poisson and Markov-modulated Poisson processes. Advanced fractal models of sequentional generators and fixed-length sequence generators, and efficient algorithms that are used to simulate self-similar behavior of IP network traffic data are developed and applied. Numerical examples are provided; and simulation results are obtained and analyzed.VoRSUNY OneontaBusinessN/
Characterisation of MEAs for Electrochemical Energy Conversion Using an Easy Test Technique
The paper describes an EasyTest cell developed for simple, safe and inexpensive to run testing and optimisation of the active materials (catalysts, catalytic supports, polymer membrane electrolytes) and electrode structures utilized in PEM Fuel cells and Electrolysers. The main advantages of the new EasyTest technique are demonstrated by a comparative study on the performance of two types of membrane electrode assemblies for electrochemical energy conversion. Nafion and PBI-based polymer electrolyte membranes covered with catalytic layers containing 20 % Pt dispersed on carbon black (E-TEK, De Nora) are tested as hydrogen electrodes working in a fuel cell and an
electrolyser mode at two characteristic temperatures, varying the total partial pressure in the cell. The PBI-based membrane electrode assembly (MEA) gives lower current densities compared to that containing Nafion, while its performance remains stable in a much
broader potential range. At overpotentials of about = 300–350 mV the Nafion MEA reaches a limiting current density, while in the case of PBI-based MEA such an effect is not registered in the whole potential range tested
In vitro bioactivity of biphasic calcium phosphate silicate glassceramic in CaO-SiO2-P2O5 system
The main purpose of the paper is the evaluation of the influence of chemical composition of the gel of the synthesized 15CaO·0.5P2O5·6SiO2 glass-ceramic on the structure, crystallization behaviour and in vitro bioactivity in static conditions for different periods of time - 3, 9 and 30 days in 1.5SBF. The obtained glass-ceramic was synthesized via polystep sol-gel technique. The structure of the prepared and the one thermally treated at 1200°C for 2 h powder was studied by XRD, 29Si MAS NMR, FTIR and SEM
- …
