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Sample records for examples felis catus

  1. The effect of cat Felis catus predation on three breeding ...

    African Journals Online (AJOL)

    Breeding success of Pterodroma macroptera, Procellaria aequinoctialis and Pachyptila vittata salvini in three cat-free and three control areas were used to evaluate the effects of cat Felis catus predation on the avifauna of Marion Island. Breeding success of all three species was significantly higher in the combined cat-free ...

  2. The effect of cat Felis catus predation on three breeding ...

    African Journals Online (AJOL)

    1987-05-08

    May 8, 1987 ... Breeding success of Pterodroma macroptera, Procellaria aequinoctialis and Pachyptila vittata salvini in three cat-free and three control areas were used to evaluate the effects of cat Felis catus predation on the avifauna of Marion Island. Breeding success of all three species was significantly higher in the ...

  3. First results of feral cats (Felis catus) monitored with GPS collars in New Zealand

    CSIR Research Space (South Africa)

    Recio, MR

    2010-04-01

    Full Text Available The presence of feral cats (Felis catus) in the braided river valleys of New Zealand poses a threat to native species such as the critically endangered black stilt (Himantopus novaezelandiae). Trapping remains the most common method to control...

  4. Experimental transmission of Cystoisospora felis-like coccidium from bobcat (Lynx rufus) to the domestic cat (Felis catus).

    Science.gov (United States)

    Dubey, J P; Houk, A E; Verma, S K; Calero-Bernal, R; Humphreys, J G; Lindsay, D S

    2015-06-30

    Cystoisospora felis is an ubiquitous coccidian of cats. The domestic cat (Felis catus) is its definitive host and several mammalian and avian species are its optional intermediate/transport hosts. Nothing is known if it is transmissible to wild felids. In the present study C. felis-like oocysts were found in two naturally infected bobcats (Lynx rufus) from Pennsylvania. To study transmission of C. felis-like parasite from bobcats to domestic cats, sporulated oocysts of C. felis-like from one bobcat were orally inoculated into interferon gamma gene knockout (KO) mice, and 56 days later tissues of KO mice were fed to two coccidian-free cats; two littermate cats were uninoculated controls. The inoculated cats and controls were euthanized five and seven days later, and their small intestines were studied histologically. One inoculated cat excreted C. felis-like oocysts seven days post inoculation (p.i.) and was immediately euthanized. Mature schizonts, mature male and female gamonts, and unsporulated oocysts were found in the lamina propria of small intestine; these stages were morphologically similar to C. felis of domestic cats. No parasites were seen in histological sections of small intestines of the remaining three cats. The experiment was terminated at seven days p.i. (minimum prepatent period for C. felis) to minimize spread of this highly infectious parasite to other cats. Although oocysts of the parasite in bobcats were morphologically similar to C. felis of domestic cats, the endogenous stages differed in their location of development. The bobcat derived parasite was located in the lamina propria of ileum whereas all endogenous stages of C. felis of domestic cats are always located in enterocytes of intestinal epithelium. Characterization of DNA isolated from C. felis-like oocysts from the donor bobcat revealed that sequences of the ITS1 region was only 87% similar to the ITS1 region of C. felis from domestic cats. These results indicate that the parasite in

  5. When domestic cat (Felis silvestris catus) population structures interact with their viruses.

    Science.gov (United States)

    Pontier, Dominique; Fouchet, David; Bahi-Jaber, Narges; Poulet, Hervé; Guiserix, Micheline; Natoli, Eugenia; Sauvage, Frank

    2009-01-01

    Many theoretical studies have proposed different causal mechanisms by which the structure of a host population could have important implications for life history traits of pathogens. However, little information is available from real systems to test these hypotheses. The domestic cat, Felis silvestris catus, whose populations exhibit a great variability in social and spatial structure, represent an ideal case study to assess this question. In the present article, we show how cat population structure may have influenced the evolution of feline viruses and, in return, how these viruses may have modified the genetic structure of cat populations.

  6. A new species of Tritrichomonas (Sarcomastigophora: Trichomonida) from the domestic cat (Felis catus).

    Science.gov (United States)

    Walden, Heather Stockdale; Dykstra, Christine; Dillon, Allen; Rodning, Soren; Givens, Daniel; Bird, Richard; Newton, Joseph; Lindsay, David

    2013-06-01

    Feline trichomoniasis is an intestinal disease in cats resulting in chronic diarrhea, flatulence, tenesmus, and fecal incontinence. Bovine trichomoniasis is a sexually transmitted disease of cattle infecting the reproductive tract of cows causing pyometra and possible mid- to late-term abortions. The causative agent for both diseases has been reported to be the flagellated protozoan, Tritrichomonas foetus. However, several published reports support significant biological differences between T. foetus isolated from bovines and felines. In the present study, we describe Tritrichomonas blagburni n.sp. from the domestic cat (Felis catus) as the causative agent of feline intestinal trichomoniasis. We support our proposal based on results of experimental cross-infection studies between cats and cattle using both feline and bovine isolates of the parasite, differences in pathogenicity between the two parasites for the respective host species, and molecular gene sequencing differences between parasites obtained from domestic cats and parasites obtained from cattle.

  7. Changes in selected hematology and serum biochemistry in Turkish Angora cats (Felis catus during growth period

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    Ozkan Simsek

    2015-03-01

    Full Text Available The purpose of the present study was to determine the changes in selected hematology and serum biochemistry of Angora cats (Felis catus during growth period. A total of 32 Angora cats (16 adults and 16 kittens were used in this study. Blood samples were collected from the animals, and were analyzed for white blood cells, red blood cells, hemoglobin, packed cell volume, mean corpuscular volume (MCV, mean corpuscular hemoglobin, mean corpuscular hemoglobin concentration, granulocytes, monocytes and lymphocytes numbers. In the serum, alanine aminotransferase, aspartate aminotransferase (AST, alkaline phosphatase (ALP, gamma glutamyl transferase (GGT, lactate dehydrogenase (LDH, creatinine kinase (CK, total cholesterol, glucose, triglyceride, urea, creatinine, total protein, albumin, Ca, Mg, Pi levels were determined. Monocyte level was found higher, and ALP, LDH, CK activities and Pi levels were lower in adult cats as compared to the kittens. MCV was lower and GGT and AST activities, and glucose level were higher in kittens of 1.5-3 months old than in kittens of >3 months. Concentrations of total cholesterol and Mg were higher in kitten (1.5-3 months old than in adult cats. In conclusion, age related effects on hematological and biochemical blood parameters have been determined for the first time in Angora cats.

  8. Gastrointestinal Helminthic Parasites in Stray Cats (Felis catus from North of Iran

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    A Rezaei-Doust

    2007-08-01

    Full Text Available Background: Cats play a crucial role in the epidemiology of gastrointestinal helminthic parasites and also play a major role in transmitting of these parasites through faecal contamination of soil, food or water. The aim of this study was to determine the species of gastrointestinal helminthes parasites in stray cats from a rural area of Bandar-e-Anzali, Iran.Method: Gastrointestinal helminthes were collected from 50 necropsied stray cats (Felis catus after capturing them by trapping from different regions of the city and humanely euthanatized in Bandar-e-Anzali, a port in the Caspian Sea in northern Iran, from March to November 2003. Results: The prevalence of infection was 90%, with those of individual parasites being Diplopylidium nolleri 54%, Phy­saloptera praeputialis 32%, Ancylostoma tubaeforme 20%, Joyeuxiella pasqualei 10%, Toxocara cati 8%, Pterygoderma­tites affinis 6%, Ancylostoma caninum 4%, and Taenia taeniaeformis 2%. Concurrent infections with two or more parasites were recorded in 34% of the individuals. In relation to the sex, the differences were not significant. Conclusion: P. praeputialis, T. cati, D. nolleri and sometime J. pasqualei are the commonest Helminthes in cats. This is the first reported isolation of P. affinis and A. caninum infections from cats in Iran.

  9. Prevalensi Infeksi Cacing Ancylostoma Spp Pada Kucing Lokal (Felis catus Di Kota Denpasar

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    Putu Anna Oktaviana

    2014-08-01

    Full Text Available A long time ago local cat (Felis catus is a symbol of faith and now it turns to mice controller or even pet. The efficiency of maintains and food make more people interested to take care of cat. Based on the area of living, cat can be categorized into three such as: (1 Domestic pet cats , (2 Stray cats  and (3 Feral cats. Domestic pet cats can be categorized into three also based on authority area such as  Indoor, Limited range and Free range. Cat disease can cause by parasite, virus, bacteria and fungus. There are some species of parasite which often be found in cat digest track such as Ancylostoma spp,  Toxocara spp and Strongyloides spp. The purpose of this research is to know the prevalence of Ancylostomma spp. infection in local cat. This research use 80 samples which divide into 40 stray cat feces and 40 home cat feces using floatation method. From 40 samples of examinated stray cat feces, 19 samples (47.5% positively found the egg of Ancylostoma spp. Meanwhile from 40 samples of examinated home cat feces, 10 samples  (25.0 %  positively found the egg of Ancylostoma spp. After analyzed by Chi-square test, there is a clear relation between the prevalence of Ancylostoma spp. infection in home cat and stray cat. (P<0,05

  10. The cat fur mite, Lynxacarus radovskyi Tenorio, 1974 (Acarina: Astigmata: Listrophoridae) from cat, Felis catus in peninsular Malaysia.

    Science.gov (United States)

    Jeffery, J; Norhidayu, S; Mohd Zain, S N; Noor Hayati, M I; Nurazila, B

    2012-06-01

    The cat fur mite, Lynxacarus radovskyi Tenorio, 1974 (Acarina: Astigmata: Listrophoridae) is reported from cats, Felis catus from three sites in peninsular Malaysia. The first site is a Malay village, Kampong Menteri in Taiping, Perak, where the mites were found on local pet cats. The other two sites are urban cities of Kuala Lumpur, in the Federal Territory and Georgetown, in the island of Penang. Mites from the urban areas were collected from stray cats. Although several ectoparasites (fleas, mites, ticks and lice) have been previously reported, L. radovskyi is recorded herein for the first time on cats from peninsular Malaysia.

  11. Felis Catus Gammaherpesvirus 1 DNAemia in Whole Blood from Therapeutically Immunosuppressed or Retrovirus-Infected Cats

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    Alicia J. McLuckie

    2017-03-01

    Full Text Available Gammaherpesviruses are major co-pathogens of human immunodeficiency virus (HIV infection, making the interactions between feline immunodeficiency virus (FIV and Felis catus gammaherpesvirus 1 (FcaGHV1 pertinent to both human and veterinary medical research. FIV-infected cats are at increased risk of FcaGHV1 DNAemia and consistently harbor higher FcaGHV1 loads than FIV-uninfected cats. Whether immune deficiencies unrelated to FIV are associated with similar risks is unknown. Using whole blood FcaGHV1 qPCR, we found no difference in the frequency of DNAemia or DNA load in therapeutically immunosuppressed (P1, n = 18 or feline leukemia virus (FeLV-infected (P2, n = 57 patients compared with age- and sex-matched controls (C1, n = 58; C2, n = 57. In contrast, FIV/FeLV-co-infected cats (P3, n = 5 were at increased risk of FcaGHV1 DNAemia compared to retrovirus uninfected controls (C3, n = 39; p = 0.0068, and had a higher median FcaGHV1 DNA load, although the latter was not significant. FIV/FeLV-co-infected cats (P3 had a similar frequency of FcaGHV1 DNAemia reported compared to FIV-infected controls (C4. In conclusion, we found no evidence that cats with therapeutic immunosuppression or FeLV infection were at greater risk of FcaGHV1 DNAemia or had higher FcaGHV1 DNA load in whole blood. The risk of DNAemia in FIV/FeLV-co-infected cats was similar to that documented previously in cats infected with FIV alone.

  12. Extent of linkage disequilibrium in the domestic cat, Felis silvestris catus, and its breeds.

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    Hasan Alhaddad

    Full Text Available Domestic cats have a unique breeding history and can be used as models for human hereditary and infectious diseases. In the current era of genome-wide association studies, insights regarding linkage disequilibrium (LD are essential for efficient association studies. The objective of this study is to investigate the extent of LD in the domestic cat, Felis silvestris catus, particularly within its breeds. A custom illumina GoldenGate Assay consisting of 1536 single nucleotide polymorphisms (SNPs equally divided over ten 1 Mb chromosomal regions was developed, and genotyped across 18 globally recognized cat breeds and two distinct random bred populations. The pair-wise LD descriptive measure (r(2 was calculated between the SNPs in each region and within each population independently. LD decay was estimated by determining the non-linear least-squares of all pair-wise estimates as a function of distance using established models. The point of 50% decay of r(2 was used to compare the extent of LD between breeds. The longest extent of LD was observed in the Burmese breed, where the distance at which r(2 ≈ 0.25 was ∼380 kb, comparable to several horse and dog breeds. The shortest extent of LD was found in the Siberian breed, with an r(2 ≈ 0.25 at approximately 17 kb, comparable to random bred cats and human populations. A comprehensive haplotype analysis was also conducted. The haplotype structure of each region within each breed mirrored the LD estimates. The LD of cat breeds largely reflects the breeds' population history and breeding strategies. Understanding LD in diverse populations will contribute to an efficient use of the newly developed SNP array for the cat in the design of genome-wide association studies, as well as to the interpretation of results for the fine mapping of disease and phenotypic traits.

  13. Functional Analyses of Bitter Taste Receptors in Domestic Cats (Felis catus).

    Science.gov (United States)

    Lei, Weiwei; Ravoninjohary, Aurore; Li, Xia; Margolskee, Robert F; Reed, Danielle R; Beauchamp, Gary K; Jiang, Peihua

    2015-01-01

    Cats are obligate carnivores and under most circumstances eat only animal products. Owing to the pseudogenization of one of two subunits of the sweet receptor gene, they are indifferent to sweeteners, presumably having no need to detect plant-based sugars in their diet. Following this reasoning and a recent report of a positive correlation between the proportion of dietary plants and the number of Tas2r (bitter receptor) genes in vertebrate species, we tested the hypothesis that if bitter perception exists primarily to protect animals from poisonous plant compounds, the genome of the domestic cat (Felis catus) should have lost functional bitter receptors and they should also have reduced bitter receptor function. To test functionality of cat bitter receptors, we expressed cat Tas2R receptors in cell-based assays. We found that they have at least 7 functional receptors with distinct receptive ranges, showing many similarities, along with some differences, with human bitter receptors. To provide a comparative perspective, we compared the cat repertoire of intact receptors with those of a restricted number of members of the order Carnivora, with a range of dietary habits as reported in the literature. The numbers of functional bitter receptors in the terrestrial Carnivora we examined, including omnivorous and herbivorous species, were roughly comparable to that of cats thereby providing no strong support for the hypothesis that a strict meat diet influences bitter receptor number or function. Maintenance of bitter receptor function in terrestrial obligate carnivores may be due to the presence of bitter compounds in vertebrate and invertebrate prey, to the necessary role these receptors play in non-oral perception, or to other unknown factors. We also found that the two aquatic Carnivora species examined had fewer intact bitter receptors. Further comparative studies of factors driving numbers and functions of bitter taste receptors will aid in understanding the forces

  14. Functional Analyses of Bitter Taste Receptors in Domestic Cats (Felis catus.

    Directory of Open Access Journals (Sweden)

    Weiwei Lei

    Full Text Available Cats are obligate carnivores and under most circumstances eat only animal products. Owing to the pseudogenization of one of two subunits of the sweet receptor gene, they are indifferent to sweeteners, presumably having no need to detect plant-based sugars in their diet. Following this reasoning and a recent report of a positive correlation between the proportion of dietary plants and the number of Tas2r (bitter receptor genes in vertebrate species, we tested the hypothesis that if bitter perception exists primarily to protect animals from poisonous plant compounds, the genome of the domestic cat (Felis catus should have lost functional bitter receptors and they should also have reduced bitter receptor function. To test functionality of cat bitter receptors, we expressed cat Tas2R receptors in cell-based assays. We found that they have at least 7 functional receptors with distinct receptive ranges, showing many similarities, along with some differences, with human bitter receptors. To provide a comparative perspective, we compared the cat repertoire of intact receptors with those of a restricted number of members of the order Carnivora, with a range of dietary habits as reported in the literature. The numbers of functional bitter receptors in the terrestrial Carnivora we examined, including omnivorous and herbivorous species, were roughly comparable to that of cats thereby providing no strong support for the hypothesis that a strict meat diet influences bitter receptor number or function. Maintenance of bitter receptor function in terrestrial obligate carnivores may be due to the presence of bitter compounds in vertebrate and invertebrate prey, to the necessary role these receptors play in non-oral perception, or to other unknown factors. We also found that the two aquatic Carnivora species examined had fewer intact bitter receptors. Further comparative studies of factors driving numbers and functions of bitter taste receptors will aid in

  15. Genetic variability of Herpailurus yagouaroundi, Puma concolor and Panthera onca (Mammalia, Felidae studied using Felis catus microsatellites

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    Vanessa Roma Moreno

    2006-01-01

    Full Text Available We used four microsatellite loci (Fca08, Fca45, Fca77 and Fca96 from the domestic cat, Felis catus, to investigate genetic variability in specimens of Herpailurus yagouaroundi (jaguarundi, otter cat, eyra, Puma concolor (cougar, mountain lion, puma and Panthera onca (jaguar held in various Brazilian zoos. Samples of DNA from the cats were PCR amplified and then sequenced before being analyzed using the CERVUS program. Our results show a mean polymorphic information content (PIC of 0.83 for H. yagouaroundi, 0.66 for P. concolor and 0.69 for P. onca and a mean of 10.3 alleles for the Fca08 locus, 5.3 for Fca 45, 9 for Fca 77 and 14 for Fca 96. These results indicate a relatively high level of genetic diversity for the specimens studied.

  16. Survival of feral cats, Felis catus (Carnivora: Felidae), on Mauna Kea, Hawai'i, based on tooth cementum lines

    Science.gov (United States)

    Danner, Raymond M.; Farmer, Chris; Hess, Steven C.; Stephens, Robert M.; Banko, Paul C.

    2010-01-01

    Feral cats (Felis catus) have spread throughout anthropogenic and insular environments of the world. They now threaten many species of native wildlife with chronic depredation. Knowledge of feral cat population dynamics is necessary to understand their ecological effects and to develop effective control strategies. However, there are few studies worldwide regarding annual or lifetime survival rates in remote systems, and none on Pacific islands. We constructed the age distribution and estimated survival of feral cats in a remote area of Hawai'i Island using cementum lines present in lower canine teeth. Our data suggest annual cementum line formation. A log-linear model estimated annual survival ≥ 1 yr of age to be 0.647. Relatively high survival coupled with high reproductive output allows individual cats to affect native wildlife for many years and cat populations to rebound quickly after control efforts.

  17. Seroprevalence of Toxoplasma gondii and Neospora caninum in feral cats (Felis silvestris catus) in Majorca, Balearic Islands, Spain.

    Science.gov (United States)

    Millán, Javier; Cabezón, Oscar; Pabón, Marcela; Dubey, J P; Almería, Sonia

    2009-11-12

    Felids are important in the epidemiology of Toxoplasma gondii infection because they are the only hosts that can excrete environmentally resistant oocysts. Antibodies to T. gondii and Neospora caninum were determined in serum samples from 59 feral cats (Felis silvestris catus) captured in baited traps during authorized predator control campaigns in Majorca, Balearic Islands, Spain. Antibodies to T. gondii assayed by the modified agglutination test (MAT) were found in 50 (84.7%) of 59 cats with MAT titers of 1:25 in one cat, 1:200 in four cats, 1:500 in seven cats, 1:1000 in nine cats, and >or=1:2000 in 29 cats. Seroprevalence (MAT, 1:25 or more) was significantly higher in adults (94.6%) than in juveniles (island since the seropositive cats are likely to have already shed T. gondii oocysts in the environment.

  18. Echinococcus multilocularis detection in the intestines and feces of free-ranging domestic cats (Felis s. catus) and European wildcats (Felis s. silvestris) from northeastern France.

    Science.gov (United States)

    Umhang, Gérald; Forin-Wiart, Marie-Amélie; Hormaz, Vanessa; Caillot, Christophe; Boucher, Jean-Marc; Poulle, Marie-Lazarine; Franck, Boué

    2015-11-30

    Experimental studies have demonstrated that cats can be infected by Echinococcus multilocularis, although few data are available concerning their natural infection. This study was designed to compare experimental findings with information on the prevalence of natural E. multilocularis infections of cats in a rural high endemic area. Of 19 intestines of domestic cats (Felis s. catus) and five of European wildcats (Felis s. silvestris) analyzed by segmental sedimentation and counting technique (SSCT), infection by E. multilocularis was observed for one individual of each species, resulting in a prevalence estimated at 5%, (CI95%: 1-26) in domestic cats and at 20% (CI95%: 1-72) in wildcats. High worm burdens (680 and 7040) were noted, but comprised only immature worms. The same EmsB microsatellite profile obtained from the worms' DNA was observed in the two cats as in foxes from the same area and from other European countries. The presence of E. multilocularis DNA was diagnosed in 3.1% (10/321) of the domestic cat feces collected on the field in two villages. However, no E. multilocularis eggs were found after flotation with zinc chloride of the positive feces. The detection of DNA from E. multilocularis was thought to be due to the presence of cells from worms untied from the intestine and corresponding to prepatent infection or due to the digested metacestode. These results from E. multilocularis presence in wild and domestic cat populations agree with those previously obtained by experimental infections. These findings support that these cats play an insignificant role in E. multilocularis transmission, even in a "highly endemic" region. Nevertheless, since the presence of thick-shelled E. multilocularis eggs from cats has already been reported, the associated zoonotic risk cannot be totally ruled out, even if it is very low. Copyright © 2015 Elsevier B.V. All rights reserved.

  19. Isolation and characterisation of renal metabolites of gamma-glutamylfelinylglycine in the urine of the domestic cat (Felis catus).

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    Hendriks, Wouter H; Harding, David R K; Rutherfurd-Markwick, Kay J

    2004-10-01

    The renal metabolism of the tripeptide, gamma-glutamylfelinylglycine, which our group recently identified in the blood of domestic cats (Felis catus), was investigated. To test our hypothesis that this unique tripeptide is metabolised by the kidney in a similar manner to glutathione-S-conjugates in other animal species, [(35)S]cysteine was administered intraperitoneally to an entire male cat, and urine collected at 1, 4 and 8 h post-injection. Radiolabelled fractions were isolated from the urine following reversed-phase (RP) HPLC. Four [(35)S]radiolabelled fractions were identified and characterised by amino acid analysis, mass spectrometry and comparison of retention times with synthetic compounds (felinine, N-acetyl felinine, felinylglycine, gamma-glutamylfelinylglycine). In addition to the previously described presence of free felinine, we showed the presence of several felinine-containing metabolites, including N-acetyl felinine, felinylglycine and unaltered gamma-glutamylfelinylglycine in cat urine. The results show that renal metabolism of gamma-glutamylfelinylglycine in cats, generally occurs in a similar manner to glutathione S-conjugates in other animal species, although the detection of felinylglycine indicates that subtle differences may exist. Additionally, our research indicates that previously reported estimates of felinine excretion in male cats need to be increased by as much as 54% to account for other felinine containing metabolites in the urine.

  20. What's inside your cat's head? A review of cat (Felis silvestris catus) cognition research past, present and future.

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    Vitale Shreve, Kristyn R; Udell, Monique A R

    2015-11-01

    The domestic cat (Felis silvestris catus) has shared an intertwined existence with humans for thousands of years, living on our city streets and in our homes. Yet, little scientific research has focused on the cognition of the domestic cat, especially in comparison with human's other companion, the domestic dog (Canis lupus familiaris). This review surveys the current status of several areas of cat cognition research including perception, object permanence, memory, physical causality, quantity and time discrimination, cats' sensitivity to human cues, vocal recognition and communication, attachment bonds, personality, and cognitive health. Although interest in cat cognition is growing, we still have a long way to go until we have an inclusive body of research on the subject. Therefore, this review also identifies areas where future research must be conducted. In addition to the scientific value of future work in this area, future research on cat cognition could have an important influence on the management and welfare of pet and free-roaming cats, leading to improved human-cat interactions.

  1. Social interaction, food, scent or toys? A formal assessment of domestic pet and shelter cat (Felis silvestris catus) preferences.

    Science.gov (United States)

    Vitale Shreve, Kristyn R; Mehrkam, Lindsay R; Udell, Monique A R

    2017-08-01

    Domestic cats (Felis silvestris catus) engage in a variety of relationships with humans and can be conditioned to engage in numerous behaviors using Pavlovian and operant methods Increasingly cat cognition research is providing evidence of their complex socio-cognitive and problem solving abilities. Nonetheless, it is still common belief that cats are not especially sociable or trainable. This disconnect may be due, in part, to a lack of knowledge of what stimuli cats prefer, and thus may be most motivated to work for. The current study investigated domestic cat preferences at the individual and population level using a free operant preference assessment. Adult cats from two populations (pet and shelter) were presented with three stimuli within each of the following four categories: human social interaction, food, toy, and scent. Proportion of time interacting with each stimulus was recorded. The single most-preferred stimulus from each of the four categories were simultaneously presented in a final session to determine each cat's most-preferred stimulus overall. Although there was clear individual variability in cat preference, social interaction with humans was the most-preferred stimulus category for the majority of cats, followed by food. This was true for cats in both the pet and shelter population. Future research can examine the use of preferred stimuli as enrichment in applied settings and assess individual cats' motivation to work for their most-preferred stimulus as a measure of reinforcer efficacy. Copyright © 2017 Elsevier B.V. All rights reserved.

  2. Prevalensi Infeksi Protozoa Saluran Pencernaan Pada Kucing Lokal (Felis catus Di Denpasar

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    Putu Titin Evi Sucitrayani

    2014-08-01

    Full Text Available Cat is one of the pets which many people love to looking after.  A lot of people looking after cat but so many of them don’t pay much attention to cats wealth, this makes them become stray cat. The most common gastrointestinal protozoa in cat is Giardia felis, Cryptosporadium felis, Sarcocystis spp, Hammondia hamondi, Toxoplasma gondii, and Isospora spp. The purpose of this research is to know the prevalence of gastrointestinal protozoa infection in local home cat and stray cat in Denpasar. This research used 80 samples of cat feces, 40 home cat feces and 40 stray cat feces. Samples examined using float concentration method, with saturated sodium chloride. From 80 examined samples, 25 samples (31,3 % infected with gastrointestinal protozoa. For home cat, from 40 examined samples 9 samples  (22,5%  infected with gastrointestinal protozoa, meanwhile from stray cat, 16 samples (40 %  infected from gastrointestinal protozoa.

  3. Free-ranging domestic cats (Felis catus) on public lands: estimating density, activity, and diet in the Florida Keys

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    Cove, Michael V.; Gardner, Beth; Simons, Theodore R.; Kays, Roland; O'Connell, Allan F.

    2017-01-01

    Feral and free-ranging domestic cats (Felis catus) can have strong negative effects on small mammals and birds, particularly in island ecosystems. We deployed camera traps to study free-ranging cats in national wildlife refuges and state parks on Big Pine Key and Key Largo in the Florida Keys, USA, and used spatial capture–recapture models to estimate cat abundance, movement, and activities. We also used stable isotope analyses to examine the diet of cats captured on public lands. Top population models separated cats based on differences in movement and detection with three and two latent groups on Big Pine Key and Key Largo, respectively. We hypothesize that these latent groups represent feral, semi-feral, and indoor/outdoor house cats based on the estimated movement parameters of each group. Estimated cat densities and activity varied between the two islands, with relatively high densities (~4 cats/km2) exhibiting crepuscular diel patterns on Big Pine Key and lower densities (~1 cat/km2) exhibiting nocturnal diel patterns on Key Largo. These differences are most likely related to the higher proportion of house cats on Big Pine relative to Key Largo. Carbon and nitrogen isotope ratios from hair samples of free-ranging cats (n = 43) provided estimates of the proportion of wild and anthropogenic foods in cat diets. At the population level, cats on both islands consumed mostly anthropogenic foods (>80% of the diet), but eight individuals were effective predators of wildlife (>50% of the diet). We provide evidence that cat groups within a population move different distances, exhibit different activity patterns, and that individuals consume wildlife at different rates, which all have implications for managing this invasive predator.

  4. Structure of Masera's Septal Olfactory Organ in Cat (Felis silvestris f. catus - Light Microscopy in Selected Stages of Ontogeny

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    I. Kociánová

    2006-01-01

    Full Text Available The septal organ /SO/ (Masera's organ /MO/ is a chemoreceptor presently considered one of three types of olfactory organs (along with the principal olfactory region and vomeronasal organ. Notwithstanding the septal organ having been first described by Rodolfo Masera in 1943, little is known of the properties of sensory neurons or of its functional significance in chemoreception. Until now the septal organ has been described only in laboratory rodents and some marsupials. This work refers to its existence in the domestic cat (Felis silvestris f. catus. The septal organ can be identified at the end of embryonic period - 27 or 28 days of ontogenesis in cats (the 6th developmental stage of Štěrba - coincident with formation of the principal olfactory region in nasal cavity. At 45 days of ontogenesis (the 9th developmental stage of Štěrba, this septal olfactory organ is of circular or oval shape, 120 μm in diameter, in ventral part of septum nasi, lying caudally to the opening of ductus incisivus. The structure of the epithelium of septal olfactory organ is clearly distinct from the respiratory epithelium of the nasal cavity. It varies in thickness, cellular composition, as well as free surface appearance, and even lack the typical structure of sensory epithelium, in this developmental period. Nerve bundles and glandular acini are lacking in the lamina propria mucosae of the septal organ and in the adjacent tissues. Glands appear as the single non-luminized cords of epithelia extending from the surface. The adjacent respiratory epithelium contains numerous goblet cells.

  5. Vocal correlates of sender-identity and arousal in the isolation calls of domestic kitten (Felis silvestris catus

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    Scheumann Marina

    2012-12-01

    Full Text Available Abstract Introduction Human speech does not only communicate linguistic information but also paralinguistic features, e.g. information about the identity and the arousal state of the sender. Comparable morphological and physiological constraints on vocal production in mammals suggest the existence of commonalities encoding sender-identity and the arousal state of a sender across mammals. To explore this hypothesis and to investigate whether specific acoustic parameters encode for sender-identity while others encode for arousal, we studied infants of the domestic cat (Felis silvestris catus. Kittens are an excellent model for analysing vocal correlates of sender-identity and arousal. They strongly depend on the care of their mother. Thus, the acoustical conveyance of sender-identity and arousal may be important for their survival. Results We recorded calls of 18 kittens in an experimentally-induced separation paradigm, where kittens were spatially separated from their mother and siblings. In the Low arousal condition, infants were just separated without any manipulation. In the High arousal condition infants were handled by the experimenter. Multi-parametric sound analyses revealed that kitten isolation calls are individually distinct and differ between the Low and High arousal conditions. Our results suggested that source- and filter-related parameters are important for encoding sender-identity, whereas time-, source- and tonality-related parameters are important for encoding arousal. Conclusion Comparable findings in other mammalian lineages provide evidence for commonalities in non-verbal cues encoding sender-identity and arousal across mammals comparable to paralinguistic cues in humans. This favours the establishment of general concepts for voice recognition and emotions in humans and animals.

  6. Vocal correlates of sender-identity and arousal in the isolation calls of domestic kitten (Felis silvestris catus).

    Science.gov (United States)

    Scheumann, Marina; Roser, Anna-Elisa; Konerding, Wiebke; Bleich, Eva; Hedrich, Hans-Jürgen; Zimmermann, Elke

    2012-12-21

    Human speech does not only communicate linguistic information but also paralinguistic features, e.g. information about the identity and the arousal state of the sender. Comparable morphological and physiological constraints on vocal production in mammals suggest the existence of commonalities encoding sender-identity and the arousal state of a sender across mammals. To explore this hypothesis and to investigate whether specific acoustic parameters encode for sender-identity while others encode for arousal, we studied infants of the domestic cat (Felis silvestris catus). Kittens are an excellent model for analysing vocal correlates of sender-identity and arousal. They strongly depend on the care of their mother. Thus, the acoustical conveyance of sender-identity and arousal may be important for their survival. We recorded calls of 18 kittens in an experimentally-induced separation paradigm, where kittens were spatially separated from their mother and siblings. In the Low arousal condition, infants were just separated without any manipulation. In the High arousal condition infants were handled by the experimenter. Multi-parametric sound analyses revealed that kitten isolation calls are individually distinct and differ between the Low and High arousal conditions. Our results suggested that source- and filter-related parameters are important for encoding sender-identity, whereas time-, source- and tonality-related parameters are important for encoding arousal. Comparable findings in other mammalian lineages provide evidence for commonalities in non-verbal cues encoding sender-identity and arousal across mammals comparable to paralinguistic cues in humans. This favours the establishment of general concepts for voice recognition and emotions in humans and animals.

  7. Gastrointestinal Helminths and Ectoparasites in the Stray Cats (Felidae: Felis catus of Ahar Municipality, Northwestern Iran

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    Mohammad YAKHCHALI

    2017-06-01

    Full Text Available Background: The stray cats are considered as the sources of emerging humans and domestic livestock pathogens and the zoonoses of public health importance. The present study was aimed to elucidate intestinal helminth infections and infestation with ectoparasites of the stray cats of Ahar City, northwestern Iran.Methods: Totally, 51 stray cats were randomly trapped from different parts of the city between Mar and Nov 2013. The cats were assessed for ectoparasites by hair brushing, skin scraping, acetate tape preparation and othic swabs. They were euthanized and inspected for helminths infection.Results: Overall prevalence of helminths and flea were 44/51 (86.3% and 31/51 (60.78%, respectively. The infection rates were significantly different among different age groups (P<0.05. Of the 282 isolated helminths, three species of nematodes (Toxocara cati (86.3%, T. leonina (11.77%, Ancylostoma tubaeforme (5.9% and four species of cestodes (Taenia taeniaeformis (64.7%, Mesocestoides lineatus (49.02%, Dipylidium caninum (29.41%, T. hydatigena (19.6% were identified. The predominant infectious helminths in all the infected cats were T. cati (86.3% with egg per gram of feces 27.75±9. Of the 270 collected fleas, two species of Ctenocephalides felis (80% and C. canis (20% were notably frequent in the cats aged 2-3-year-old. The average number of fleas per each infected cat was recorded as 5.29, with no incidence of cross-infection.Conclusion: The results indicated the high rate of helminths infections and flea infestation in the urban stray cats of which Toxocara cati and Ctenocephalides felis may play important roles as zoonotic agents in the region.

  8. Molecular characterisation of Cryptosporidium and Giardia in cats (Felis catus) in Western Australia.

    Science.gov (United States)

    Yang, Rongchang; Ying, Joyce Lau Jie; Monis, Paul; Ryan, Una

    2015-08-01

    Little is known of the prevalence of Cryptosporidium and Giardia in domestic cats in Western Australia and their potential role as zoonotic reservoirs for human infection. In the present study, a total of 345 faecal samples from four different sources were screened for the presence of Cryptosporidium and Giardia by PCR and genotyped by sequence analysis. Oocyst numbers and cyst numbers for Cryptosporidium and Giardia respectively were also determined using quantitative PCR assays. Cryptosporidium and Giardia were detected in 9.9% (95% CI 6.7-13.0) and 10.1% (95% CI 7.0-13.3) of cats in Western Australia respectively. Sequence analysis at the 18S rRNA locus identified five Cryptosporidium species/genotypes; C. felis (n = 8), C. muris (n = 1), C. ryanae (n = 1), Cryptosporidium rat genotype III (n = 5) and a novel genotype most closely related to Cryptosporidium rat genotype III in one isolate. This is the first report of C. ryanae and Cryptosporidium rat genotype III in cats. For Giardia, assemblage F the most commonly identified species, while only 1 assemblage sequence was detected. Since most human cases of cryptosporidiosis are caused by C. parvum and C. hominis and human cases of giardiasis are caused by G. duodenalis assemblage A and B, the domestic cats in the present study are likely to be of low zoonotic risk to pet owners in Perth. Risk analyses identified that elderly cats (more than 6 years) were more prone to Cryptosporidium and Giardia infections than kittens (less than 6 months) (P = 0.009). Clinical symptoms were not associated with the prevalence of Cryptosporidium and Giardia infections in cats. Copyright © 2015 Elsevier Inc. All rights reserved.

  9. The 'Feline Five': An exploration of personality in pet cats (Felis catus.

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    Carla A Litchfield

    Full Text Available The idea of animals possessing personalities was once dismissed by the scientific community, but has since gained traction with evidence for potential application to improve captive animal management and welfare. Although domestic cats are popular companion animals, research has tended to overlook the value of personality assessment for management and care of pet cats. The aim of this study was to investigate personality in a large sample of pet cats with a view to understanding practical implications for pet cats in the home. Personality of 2,802 pet cats, from South Australia and New Zealand, was rated by their owners utilising a survey measuring 52 personality traits. Five reliable personality factors were found using principal axis factor analysis: Neuroticism, Extraversion, Dominance, Impulsiveness and Agreeableness. Implications for the 'Feline Five' are discussed in relation to their potential application to improving the management and welfare of pet cats. Highly Impulsive cats for example, may be reacting to something stressful in their environment, whereas cats with low Agreeableness scores, showing irritability may indicate underlying pain or illness. Thus, the need for a systematic and holistic approach to personality that includes both the individual pet cat and its environment is recommended, and opens the door to future interdisciplinary intervention.

  10. The 'Feline Five': An exploration of personality in pet cats (Felis catus).

    Science.gov (United States)

    Litchfield, Carla A; Quinton, Gillian; Tindle, Hayley; Chiera, Belinda; Kikillus, K Heidy; Roetman, Philip

    2017-01-01

    The idea of animals possessing personalities was once dismissed by the scientific community, but has since gained traction with evidence for potential application to improve captive animal management and welfare. Although domestic cats are popular companion animals, research has tended to overlook the value of personality assessment for management and care of pet cats. The aim of this study was to investigate personality in a large sample of pet cats with a view to understanding practical implications for pet cats in the home. Personality of 2,802 pet cats, from South Australia and New Zealand, was rated by their owners utilising a survey measuring 52 personality traits. Five reliable personality factors were found using principal axis factor analysis: Neuroticism, Extraversion, Dominance, Impulsiveness and Agreeableness. Implications for the 'Feline Five' are discussed in relation to their potential application to improving the management and welfare of pet cats. Highly Impulsive cats for example, may be reacting to something stressful in their environment, whereas cats with low Agreeableness scores, showing irritability may indicate underlying pain or illness. Thus, the need for a systematic and holistic approach to personality that includes both the individual pet cat and its environment is recommended, and opens the door to future interdisciplinary intervention.

  11. Estructura genética-poblacional de gatos domésticos (Felis catus, usando marcadores fenotípicos en Santa Marta, Colombia

    Directory of Open Access Journals (Sweden)

    Luis Alfonso Causil Vargas

    2017-01-01

    Full Text Available Las variaciones en la textura y color del pelo a menudo difieren entre razas de animales, son el resultado del polimorfismo de un grupo de genes, expresados en marcadores fenotípicos, los cuales; se han convertido en una herramienta útil para el estudio de la genética de poblaciones, puesto que presentan diferentes tipos de herencia y acciones génicas. El objetivo de nuestro trabajo fue analizar la diversidad y estructura genética de las poblaciones de gatos domésticos (Felis catus en Santa Marta, Colombia; mediante genes del pelaje. Metodológicamente se realizó un muestreo de gatos en seis barrios de las ciudades de Santa Marta, por descripciones morfológicas se determinaron los fenotipos del pelaje y con base a ello se evaluaron los índices de variabilidad genética: frecuencias alélicas, equilibrio de Hardy Weinberg, diversidad genética, estructura poblacional, flujo génico y distancias genéticas. Resultados: Se obtuvo una elevada frecuencia de los marcadores O y S; los marcadores evidenciaron ausencia de equilibrio de Hardy – Weinberg. Las poblaciones mostraron un nivel moderado de diferenciación (GST= 2 0,110. Comparada con poblaciones colombianas Riohacha y Santa Marta son cercanas genéticamente y comparten similitudes con las poblaciones de la costa Caribe. En conclusión, Santa Marta presenta pocas diferencias en la estructura genética de gatos domésticos, y altos niveles de selección en ciertos fenotipos.

  12. Isolation and Genetic Characterization of Toxoplasma gondii from Black Bears (Ursus americanus), Bobcats (Lynx rufus), and Feral Cats (Felis catus) from Pennsylvania.

    Science.gov (United States)

    Dubey, Jitender P; Verma, Shiv K; Calero-Bernal, Rafael; Cassinelli, Ana B; Kwok, Oliver C H; Van Why, Kyle; Su, Chunlei; Humphreys, Jan G

    2015-01-01

    Toxoplasma gondii infects virtually all warm-blooded hosts worldwide. Recently, attention has been focused on the genetic diversity of the parasite to explain its pathogenicity in different hosts. It has been hypothesized that interaction between feral and domestic cycles of T. gondii may increase unusual genotypes in domestic cats and facilitate transmission of potentially more pathogenic genotypes to humans, domestic animals, and wildlife. In the present study, we tested black bear (Ursus americanus), bobcat (Lynx rufus), and feral cat (Felis catus) from the state of Pennsylvania for T. gondii infection. Antibodies to T. gondii were found in 32 (84.2%) of 38 bears, both bobcats, and 2 of 3 feral cats tested by the modified agglutination test (cut off titer 1:25). Hearts from seropositive animals were bioassayed in mice, and viable T. gondii was isolated from 3 of 32 bears, 2 of 2 bobcats, and 2 of 3 feral cats. DNA isolated from culture-derived tachyzoites of these isolates was characterized using multilocus PCR-RFLP markers. Three genotypes were revealed, including ToxoDB PCR-RFLP genotype #1 or #3 (Type II, 1 isolate), #5 (Type 12, 3 isolates), and #216 (3 isolates), adding to the evidence of genetic diversity of T. gondii in wildlife in Pennsylvania. Pathogenicity of 3 T. gondii isolates (all #216, 1 from bear, and 2 from feral cat) was determined in outbred Swiss Webster mice; all three were virulent causing 100% mortality. Results indicated that highly mouse pathogenic strains of T. gondii are circulating in wildlife, and these strains may pose risk to infect human through consuming of game meat. Published 2014. This article is a U.S. Government work and is in the public domain in the USA.

  13. Transforming properties of Felis catus papillomavirus type 2 E6 and E7 putative oncogenes in vitro and their transcriptional activity in feline squamous cell carcinoma in vivo

    Energy Technology Data Exchange (ETDEWEB)

    Altamura, Gennaro, E-mail: gennaro.altamura@unina.it [Department of Veterinary Medicine and Animal Productions, General Pathology and Pathological Anatomy Unit, University of Naples Federico II, Via Delpino 1, 80137 Naples (Italy); Corteggio, Annunziata, E-mail: ancorteg@unina.it [Department of Veterinary Medicine and Animal Productions, General Pathology and Pathological Anatomy Unit, University of Naples Federico II, Via Delpino 1, 80137 Naples (Italy); Pacini, Laura, E-mail: PaciniL@students.iarc.fr [Infections and Cancer Biology Group, International Agency for Research on Cancer, 150 Cours Albert Thomas, 69372 Lyon (France); Conte, Andrea, E-mail: andreaconte88@hotmail.it [Department of Molecular Medicine and Medical Biotechnologies, University of Naples Federico II, Via Pansini 5, 80131 Naples (Italy); Pierantoni, Giovanna Maria, E-mail: gmpieran@unina.it [Department of Molecular Medicine and Medical Biotechnologies, University of Naples Federico II, Via Pansini 5, 80131 Naples (Italy); Tommasino, Massimo, E-mail: tommasinom@iarc.fr [Infections and Cancer Biology Group, International Agency for Research on Cancer, 150 Cours Albert Thomas, 69372 Lyon (France); Accardi, Rosita, E-mail: accardir@iarc.fr [Infections and Cancer Biology Group, International Agency for Research on Cancer, 150 Cours Albert Thomas, 69372 Lyon (France); Borzacchiello, Giuseppe, E-mail: borzacch@unina.it [Department of Veterinary Medicine and Animal Productions, General Pathology and Pathological Anatomy Unit, University of Naples Federico II, Via Delpino 1, 80137 Naples (Italy)

    2016-09-15

    Felis catus papillomavirus type 2 (FcaPV2) DNA is found in feline cutaneous squamous cell carcinomas (SCCs); however, its biological properties are still uncharacterized. In this study, we successfully expressed FcaPV2 E6 and E7 putative oncogenes in feline epithelial cells and demonstrated that FcaPV2 E6 binds to p53, impairing its protein level. In addition, E6 and E7 inhibited ultraviolet B (UVB)-triggered accumulation of p53, p21 and pro-apoptotic markers such as Cleaved Caspase3, Bax and Bak, suggesting a synergistic action of the virus with UV exposure in tumour pathogenesis. Furthermore, FcaPV2 E7 bound to feline pRb and impaired pRb levels, resulting in upregulation of the downstream pro-proliferative genes Cyclin A and Cdc2. Importantly, we demonstrated mRNA expression of FcaPV2 E2, E6 and E7 in feline SCC samples, strengthening the hypothesis of a causative role in the development of feline SCC. - Highlights: • FcaPV2 E6 binds to and deregulates feline p53 protein. • FcaPV2 E7 binds to and deregulates feline pRb protein. • FcaPV2 oncogenes inhibit UVB-induced apoptosis. • FcaPV2 E6E7 and E7 increase the lifespan of primary cells. • FcaPV2 E2, E6 and E7 are expressed at the mRNA level in feline SCC in vivo.

  14. Spotlight census of the red fox (Vulpes vulpes and the domestic cat (Felis catus in three sample areas of the Marches region (Central Italy / Censimento notturno di Volpe (Vulpes vulpes e di Gatto domestico (Felis catus in tre aree campione delle Marche

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    Massimo Pandolfi

    1991-07-01

    Full Text Available Abstract In order to evaluate the density of the red fox and of the domestic cat, 55 transects were made from 1986 to 1989 using spotlight census method in three sample areas. The mean density of foxes agreed substantially with its biological cycle and the hightes values (2.01 foxes/km² in spring and 4.3 foxes/km² in winter were recorded in the study area with the better natural characteristics. Foxes selected the shrub woodland (macchia all year round, the inhabited area in spring. The domestic cat was widely spread and abundant, and selected especially inhabited areas where the density varied from 4.27 cats/km² (in winter to 12.42 cat/km² (in spring. Riassunto Dal 1986 al 1989, con il metodo dei percorsi notturni con fari, sono stati effettuati complessivamente 55 conteggi in tre aree campione per valutare la densità della Volpe (Vulpes vulpes e del Gatto domestico (Felis catus nonché le loro preferenze ambientali limitatamente ad una zona campione. Per la Volpe le densità medie rilevate sono sostanzialmente in accordo con il ciclo biologico della specie e quelle più elevate (2,O1 volpi/km² in primavera e 4,3 volpi/km² in inverno sono state registrate nella zona campione con maggior presenza di boschi ed aree incolte. La Volpe seleziona le zone con vegetazione "di macchia" in ogni periodo dell'anno, e le aree abitate in primavera. Per il Gatto domestico le densità rilevate evidenziano la presenza di una diffusa ed abbondante popolazione. La specie mostra una spiccata preferenza per le aree abitate dove raggiunge densità di 4,27 individui/km² e 12,42 individui/km² in inverno e primavera rispettivamente.

  15. Ectoparasitos e helmintos intestinais em Felis catus domesticus, da cidade de Lages, SC, Brasil e aspectos sócioeconômicos e culturais das famílias dos proprietários dos animais Ectoparasites and intestinal helminths in Felis catus domesticus from Lages city, SC, Brazil and social-economical and cultural aspects of owners of family pets

    Directory of Open Access Journals (Sweden)

    Fernanda Magalhães Stalliviere

    2009-12-01

    Full Text Available Os objetivos da realização deste trabalho foram determinar a prevalência de ectoparasitos e parasitos gastrointestinais (GI em gatos domiciliados, nas regiões central e periférica, da cidade de Lages, SC e também caracterizar as famílias proprietárias de gatos quanto as suas condições sócioeconômicas e culturais. No período de dezembro de 2005 a dezembro de 2006, foram distribuídos 600 questionários a proprietários de animais cidade de Lages, SC e coletados ectoparasitos e amostras de fezes. A prevalência para ectoparasitos foi de 13,8% (28/203 e para parasitos GI, 37,8% (42/111. A prevalência de parasitos em gatos domiciliados da região periférica foi maior que os da região central. Os ectoparasitos observados foram Ctenocephalides felis felis, C. canis e Ctenocephalides híbrido (C. felis felis × C. canis. Os ovos de helmintos intestinais identificados nas fezes de gatos foram Ancylostoma spp., Toxocara sp., Trichuris sp., família Taeniidae e Oncicola sp. Na região periférica, o maior número de animais positivos pertencia a proprietários de baixa renda salarial e pouca escolaridade. As populações residentes nos bairros da região periférica encontram-se mais expostas aos agentes com potencial zoonótico.The purpose of this research was to determinate the prevalence of ectoparasites and gastrointestinal (GI parasites in domiciliated cats, from central and peripheral region, of Lages city, Santa Catarina State and also characterize the economic, social and cultural status of families' pet owners. From the period of December 2005 to December 2006, 600 questionnaires were distributed to pet owners of Lages city and ectoparasites and faeces were collected. The prevalence of ectoparasites was 13.8% (28/203 and for GI parasites was 37.8% (42/111. The prevalence of parasites in domiciliated cats from the peripheral region were bigger than in the central region. The ectoparasites observed were Ctenocephalides felis felis

  16. Sanitary conditions of a colony of urban feral cats (Felis catus Linnaeus, 1758 in a zoological garden of Rio de Janeiro, Brazil Condições sanitárias de uma colônia urbana de gatos (Felis catus Linnaeus, 1758 em um jardim zoológico do Rio de Janeiro, Brasil

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    Flavya Mendes-de-Almeida

    2004-10-01

    Full Text Available The colony of urban stray cats living in the Rio de Janeiro zoological garden was studied in order to develop a population and health control program. As many cats as possible were captured during two months (47 animals and were classified according to gender, age, weight and coat markings. They were submitted to a general health evaluation, examined for the presence of ectoparasites and sent to a surgical neutering program. All animals had a blood sample drawn for CBC, platelet count, heartworm and retroviruses detection. Capillary blood smears were made for hemoparasites detection. Coat marking and colors were tabby (59.7%, followed by solid black (17%; torbie (10.6%; bicolor (10.6% and harlequin (2.1%. The only ectoparasites found were fleas, which infested 28% of the animals. The hemoparasites found were Haemobartonella felis (38% and piroplasmas that could not be differentiated between Cytauxzoon spp. and Babesia spp. (47%. No cat was found infected by Dirofilaria immitis or FeLV (Feline Leukemia Virus, although FIV (Feline Immunodeficiency Virus antibodies could be detected (21%. There was no correlation between hemoparasites and FIV infections. The estimated total cat population (mark-recapture method was 59; 68% female and 32% male, suggesting that a neutering program is in fact needed.As condições sanitárias e composição populacional de uma colônia de gatos urbanos, errantes, habitantes do zoológico do Rio de Janeiro foram estudadas, objetivando-se um programa de controle populacional e sanitário. Capturou-se o maior número de indivíduos possível durante dois meses (47 animais. Os animais capturados foram examinados quanto ao gênero, idade, peso, pelagem, inspeção geral e presença de ectoparasitas e eram encaminhados a um programa de esterilização cirúrgica. Cada animal teve uma amostra de sangue colhida para realização de hemograma completo, plaquetometria, pesquisa de hemoparasitas e de retrovírus. As marca

  17. Estudo microscópico e macroscópico, com enfoque radiográfico e de alizarina, no desenvolvimento embrionário e fetal de gatos domésticos (Felis catus em diferentes idades gestacionais

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    Dilayla K Abreu

    2011-12-01

    Full Text Available O gato doméstico (Felis catus foi nomeado por Carolus Linnaeus em seu livro Systema Naturae, em 1798. A família Felidea apresenta muita semelhança morfológica com os felinos selvagens. O estudo da embriologia do gato doméstico é de grande valia, uma vez que, é considerado um importante modelo animal quando comparado aos gatos selvagem em extinção, especialmente relacionado às pesquisas sobre biologia reprodutiva. Este trabalho objetivou análisar e comparar as fases embrionárias de quatro embriões e um feto de felinos domésticos. Nos embriões com idade gestacional estimada em 17 dias (0,5cm CR podemos observar pela análise macroscópica a presença de dilatação rostral correspondente ao prosencéfalo, o local placóide do cristalino, a flexura cervical, os quatro arcos faríngeos com os sulcos que o dividem, a proeminência cardíaca, o indício do brotamento do membro pélvico, além da presença de somitos. Na região caudal do embrião, visualizamos a curvatura cranio-caudal, permitindo ao mesmo uma posição em formato de "C". Nos embriões com idade gestacional estimada em 22 dias (1,2cm CR, na análise macroscópica foi visualizado o prosencéfalo, vesícula óptica com pigmentação da retina, vesícula ótica, quarto ventrículo, fígado, membros torácicos e pélvicos com discreta distinção dos dígitos e vascularização superficial. Nos embriões com idade gestacional estimada em 25 dias (1,5cm CR notamos a presença do prosencéfalo e mesencéfalo, a curvatura cervical pronunciada, vesícula óptica com forte pigmentação da retina, vesícula ótica, membros pélvicos e torácicos bem desenvolvidos, com distinção dos dígitos e fígado bem pronunciado. Os fetos com idade gestacional estimada em 52 dias (10cm CR possuem estruturas internas e externas facilmente identificadas em animais adultos. Com relação às estruturas ósseas notamos que as mesmas não apresentam nenhuma epífise óssea formada, sendo vis

  18. Domestic Cat (Felis silvestris catus) Urine Odour as a Potential ...

    African Journals Online (AJOL)

    The aim of this study was to investigate the effects of cat urine odour extract on rodent pest species to reduce crop losses. Cat urine from the captured cats was drawn using cat catcher. Urinary catheter was inserted into the urethra up to the urinary bladder and a syringe attached to the urinary catheter was used to draw ...

  19. Preservation of tomcat (Felis catus) semen in variable temperatures.

    Science.gov (United States)

    Siemieniuch, Marta; Dubiel, Andrzej

    2007-05-01

    The aim of our study was to estimate the viability of cat epididymal sperm in short time storage at +4 degrees C and in long term storage at -196 degrees C and to assess the percentage of live sperm in fresh semen using eosin/nigrosin staining compared to the flow cytometry method. The testes with epididymides were obtained after routine castration procedure. The sperm for further research were collected after flushing the epididymides using extender consist of: Tris 2.4 g, citric acid 1.4 g, glucose 0.8 g, 0.06% (w/v) Na-benzylpenicillin, 0.1% (w/v) streptomycin sulphate and distilled water. Half of each sample was equilibrated with the dilution and loaded in 0.25 ml plastic straws. The straws were placed on a rack in liquid nitrogen vapour at -120 degrees C for 10 min, plunged in liquid nitrogen for 10 min, replaced to marked goblets and loaded into canes for long term storage in liquid nitrogen at -196 degrees C. Sixty percent of motile spermatozoa was accomplished after thawing. However, the percentage of the sperm with intact acrosomes was decreased and the share of cells with midpiece and tail defects was increased. The storage of sperm flushed from epididymides at +4 degrees C for a short time and the usage of sperm during 2-3 days after collection seems to be better than cryopreservation. In our study, normospermia was present in 72.7 +/- 8.8% of fresh semen. The most common defect was the presence of distal droplets, imperfect heads or abnormal acrosomal outline. The motility of fresh sperm flushed from epididymides achieved 77.9 +/- 6.8%. The viability of sperm amounting to 52.5 +/- 13.8% was achieved on third day of conservation in the liquid extender. The percentage of viable sperm in fresh epididymal spermatozoa was 84.9 +/- 7.8%. Compared to these results, the percentage of live cells using SYBR-14/propidium iodide staining was insignificantly lower (82.2 +/- 8%). The live, non-apoptotic cells were 79.0 +/- 7.8%. The share of live, early-apoptotic spermatozoa and late-apoptotic spermatozoa was, respectively, 2 +/- 1.4% and 1.5 +/- 0.9%. The viability of sperm estimated by eosin/nigrosin staining was confirmed by the flow cytometry method. There was no statistical differences between the staining. The usage of apoptosis detection kit revealed, that the percentage of early-apoptotic and late-apoptotic cells was insignificant. (c)2006 Elsevier B.V. All rights reserved.

  20. Rickettsia felis in Ctenocephalides felis from Guatemala and Costa Rica.

    Science.gov (United States)

    Troyo, Adriana; Álvarez, Danilo; Taylor, Lizeth; Abdalla, Gabriela; Calderón-Arguedas, Ólger; Zambrano, Maria L; Dasch, Gregory A; Lindblade, Kim; Hun, Laya; Eremeeva, Marina E; Estévez, Alejandra

    2012-06-01

    Rickettsia felis is an emerging human pathogen associated primarily with the cat flea Ctenocephalides felis. In this study, we investigated the presence of Rickettsia felis in C. felis from Guatemala and Costa Rica. Ctenocephalides felis were collected directly from dogs and cats, and analyzed by polymerase chain reaction for Rickettsia-specific fragments of 17-kDa protein, OmpA, and citrate synthase genes. Rickettsia DNA was detected in 64% (55 of 86) and 58% (47 of 81) of flea pools in Guatemala and Costa Rica, respectively. Sequencing of gltA fragments identified R. felis genotype URRWXCal(2) in samples from both countries, and genotype Rf2125 in Costa Rica. This is the first report of R. felis in Guatemala and of genotype Rf2125 in Costa Rica. The extensive presence of this pathogen in countries of Central America stresses the need for increased awareness and diagnosis.

  1. Is the free-ranging jaguar (Panthera onca) a reservoir for Cytauxzoon felis in Brazil?

    Science.gov (United States)

    Furtado, Mariana Malzoni; Taniwaki, Sueli Akemi; Metzger, Betina; Dos Santos Paduan, Karina; O'Dwyer, Helena Lucia; de Almeida Jácomo, Anah Tereza; Porfírio, Grasiela E O; Silveira, Leandro; Sollmann, Rahel; Tôrres, Natália Mundim; Ferreira Neto, José Soares

    2017-06-01

    This study investigated the occurrence of Cytauxzoon felis and Babesia spp. in free-ranging jaguars (Panthera onca), domestic dogs (Canis lupus familiaris) and domestic cats (Felis catus) from the Cerrado, Amazon and Pantanal biomes of Brazil. Blood samples were collected from 30 jaguars, 129 dogs and 22 cats for detection of the 18S rRNA genes of piroplasmids. All of the jaguars from the Pantanal (n=22) and Cerrado (n=4) and three of four jaguars from the Amazon were positive for C. felis, but no dogs or cats were positive for the agent. All of the jaguars and domestic cats were negative for Babesia spp., while dogs from the Cerrado (7.9%; 5/63) and Amazon (10.6%; 5/47) biomes tested positive for the hemoparasite. Cytauxzoon nucleotide sequences detected were closely related to C. felis; and Babesia nucleotide sequences showed 100% of identity with Babesia vogeli. Although the pathogenicity of Cytauxzoon spp. genotypes that circulate in Brazil is still unknown, free-ranging jaguars probably play an important role in the maintenance of C. felis in nature. In addition, even though there is no evidence of the circulation of Babesia spp. between jaguars and dogs, the presence of this hemoparasite should be monitored in jaguar populations. Copyright © 2017 Elsevier GmbH. All rights reserved.

  2. On Felis badia Gray

    NARCIS (Netherlands)

    Jentink, F.A.

    1901-01-01

    Among some very commonly known mammals, presented to the Leyden Museum by the well-known Dutch Borneoexplorer Dr. Nieuwenhuis, I found a fine Cat quite distinct from all other cats I ever saw; it has a size somewhat larger than Felis planiceps, a small head like that cat, a much longer tail and a

  3. Rickettsia felis in Ctenocephalides felis felis from Five Geographic Regions of Brazil

    Science.gov (United States)

    Horta, Mauricio C.; Ogrzewalska, Maria; Azevedo, Milka C.; Costa, Francisco B.; Ferreira, Fernando; Labruna, Marcelo B.

    2014-01-01

    This study evaluated rickettsial infection in 701 Ctenocephalides felis felis fleas that were collected from dogs and cats in 31 municipalities, encompassing all regions and major biomes of Brazil. A total of 268 (38.2%) fleas from 30 municipalities were polymerase chain reaction (PCR) positive for the rickettsial gltA gene. The PCR products from 44 fleas, consisting of at least 1 PCR-positive flea from each of 30 municipalities, generated DNA sequences identical to Rickettsia felis. Rickettsial prevalence was highly variable among 30 municipalities, with values ranging from 2.9% to 100%. Significantly higher infection rates by R. felis were associated with the Pampa biome (southern Brazil), and the temperate climate that prevails in southern Brazil. In contrast, lowest R. felis-infection rates were significantly associated with the Caatinga biome, and its semiarid climate. Further studies should evaluate the effect of temperature and moisture on the R. felis infection in Ctenocephalides fleas world widely. PMID:24778194

  4. Esporotricose do gato doméstico (Felis catus: transmissão humana Sporothricosis of the domestic cat (Felis catus: human transmission

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    Silvio Alencar Marques

    1993-08-01

    Full Text Available No presente trabalho relata-se caso de paciente, funcionário de hospital veterinário, infectado através de arranhadura de gato doméstico portador de esporotricose. Inquérito domiciliar junto aos proprietários do animal fonte de infecção, revelou dois outros casos presuntivos de esporotricose humana transmitida por gatos, e confirmou o diagnóstico, por cultivo do Sporotrix schenckii, em 3 gatos domésticos adicionais. A esporotricose felina caracteriza-se por lesões cutâneas ulceradas e tendência à disseminação sistêmica e evolução fatal. A transmissão intra e inter-espécie é facilitada pela exuberância de fungos nas lesões cutâneas de felinos infectados.A case of sporothricosis transmitted by cat to a veterinarian hospital employee is reported. Inquiry at domiciliar area of the cat's owner revelled two other presumable cases of human sporothricosis transmitted by cats, and confirmed the diagnosis (by culture of Sporothrix schenckii of disease in three other domestic cats. Feline sporothricosis is characterized by ulcerative, cutaneous lesions and systemic dissemination, which invariably cause animal's death. The transmission of sporothricosis to other animals and humans is enhanced by the great amount of fungus present in cat's lesions.

  5. The effect of chronic kidney disease on the urine proteome in the domestic cat (Felis catus).

    Science.gov (United States)

    Ferlizza, E; Campos, A; Neagu, A; Cuoghi, A; Bellei, E; Monari, E; Dondi, F; Almeida, A M; Isani, G

    2015-04-01

    Chronic kidney disease (CKD) is a major cause of mortality in cats, but sensitive and specific biomarkers for early prediction and monitoring of CKD are currently lacking. The present study aimed to apply proteomic techniques to map the urine proteome of the healthy cat and compare it with the proteome of cats with CKD. Urine samples were collected by cystocentesis from 23 healthy young cats and 17 cats with CKD. One-dimensional sodium-dodecyl-sulfate polyacrylamide gel electrophoresis (1D-SDS-PAGE) was conducted on 4-12% gels. Two-dimensional electrophoresis (2DE) was applied to pooled urine samples from healthy cats (n = 4) and cats with CKD (n = 4), respectively. Sixteen protein bands and 36 spots were cut, trypsin-digested and identified by mass spectrometry. 1D-SDS-PAGE yielded an overall view of the protein profile and the separation of 32 ± 6 protein bands in the urine of healthy cats, while CKD cats showed significantly fewer bands (P urine proteome, producing a reference map that included 20 proteins. Cauxin was the most abundant protein in urine of healthy cats. Several protease inhibitors and transport proteins that derive from plasma were also identified, including alpha-2-macroglobulin, albumin, transferrin, haemopexin and haptoglobin. There was differential expression of 27 spots between healthy and CKD samples (P cats suggesting that these proteins are candidate biomarkers. Copyright © 2015 Elsevier Ltd. All rights reserved.

  6. Domestic Cats (Felis silvestris catus Do Not Show Signs of Secure Attachment to Their Owners.

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    Alice Potter

    Full Text Available The Ainsworth Strange Situation Test (SST has been widely used to demonstrate that the bond between both children and dogs to their primary carer typically meets the requirements of a secure attachment (i.e. the carer being perceived as a focus of safety and security in otherwise threatening environments, and has been adapted for cats with a similar claim made. However methodological problems in this latter research make the claim that the cat-owner bond is typically a secure attachment, operationally definable by its behaviour in the SST, questionable. We therefore developed an adapted version of the SST with the necessary methodological controls which include a full counterbalance of the procedure. A cross-over design experiment with 20 cat-owner pairs (10 each undertaking one of the two versions of the SST first and continuous focal sampling was used to record the duration of a range of behavioural states expressed by the cats that might be useful for assessing secure attachment. Since data were not normally distributed, non-parametric analyses were used on those behaviours shown to be reliable across the two versions of the test (which excluded much cat behaviour. Although cats vocalised more when the owner rather the stranger left the cat with the other individual, there was no other evidence consistent with the interpretation of the bond between a cat and its owner meeting the requirements of a secure attachment. These results are consistent with the view that adult cats are typically quite autonomous, even in their social relationships, and not necessarily dependent on others to provide a sense of security and safety. It is concluded that alternative methods need to be developed to characterise the normal psychological features of the cat-owner bond.

  7. Detection of antibodies against Leishmania infantum in cats (Felis catus from the State of Pernambuco, Brazil

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    Rita de Cássia Nascimento Silva

    2014-01-01

    Full Text Available Introduction: Little information is available concerning infection by Leishmania infantum in cats. Therefore, the aim of this study was to perform a serological study in domestic cats. Methods: Serum samples (n=153 obtained from animals living in the Cities of Recife and Petrolina, State of Pernambuco, Brazil, were tested by ELISA/S7® (Biogene. Results: Anti-L. infantum antibodies were detected in 3.9% (6/153 of the cats. All seroreagent animals were from Petrolina. Conclusions: These results serve as an important alert, and future studies are needed to better understand the possible role of cats in the epidemiology of visceral leishmaniasis (VL in this area.

  8. Seroprevalence of Toxoplasma gondii in Cats (Felis catus, Linnaeus 1758 Living in San Carlos (Chile

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    Ignacio Eduardo Troncoso Toro

    2015-05-01

    Full Text Available There are few studies about seroprevalence of toxoplasmosis in Chile; therefore, this article aims to determine seroprevalence in cats in the district of San Carlos, by ELISA Immuno- Comb® serological technique, and, at the same time, to examine association with variables of sex, age, diet, and habitat. To the effect, 60 cats over 2 months old were randomly sampled. Sera were analyzed using the ELISA ImmunoComb® Biogal Toxo & Chlamydia test kit, which detects specific immunoglobulin G-type antibodies against Toxoplasma gondii with a sensitivity of 92.3% and a specificity of 100%. The study evidenced that 29 individuals were positive (48.3% seroprevalence; when broken down by gender this corresponded to 9 males and 20 females (39.1% and 54%, respectively. By age, seropositivity was higher in the “Adult” group (76.7%, followed by groups “Over 7 years” (50% and “Young” (25%. With respect to diet, higher seropositivity was obtained in animals fed on mixed diet, as opposed to commercial diet (60% vs. 47.2%. By variable habitat, 16 indoor and 13 outdoor cats were positive (45.7% and 52%, showing statistically significant difference only for the variable age (p < 0.05. Finally, through relating age with seropositivity, a negative correlation was evidenced (r = –0.3, indicating that older individuals had lower seroprevalence. The results show the presence of antibodies against Toxoplasma gondii in domestic cats.

  9. Estudo anatômico do trajeto do canal mandibular em felinos (Felis catus domesticus

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    S.C. Cotrim

    2015-12-01

    Full Text Available Objetivou-se descrever, por meio de tomografia computadorizada, o trajeto do canal mandibular (CM em 20 gatos sem raça definida, com ausência de alterações na cavidade oral, provenientes do Centro de Controle de Zoonoses do Distrito Federal. Foram realizados cortes tomográficos com 2mm de espessura, acompanhando todo o trajeto do CM, tendo como referência a região do forame mandibular, as raízes distais e mesiais dos dentes pré-molares e molares e o forame mentoniano, obtendo-se medidas desde o CM até as faces vestibular, lingual, ventral e alveolar (profundidade do corpo da mandíbula, bem como seu diâmetro. Pôde constatar que o CM manteve-se no aspecto lingual do corpo da mandíbula desde o forame mandibular até a raiz mesial do 1º pré-molar, onde se deslocou para a face vestibular, emergindo no forame mentoniano. Com relação à profundidade, seu trajeto sofreu declive a partir do forame mandibular até a região da raiz mesial do 1º molar, onde alcançou seu ponto mais profundo para prosseguir em suave ascensão até o forame mentoniano. Os dados apresentados contribuem para o estudo anatômico da mandíbula de gatos, bem como auxiliam no melhor planejamento e execução de procedimentos cirúrgicos na mandíbula dessa espécie.

  10. ISFM guidelines on population management and welfare of unowned domestic cats (Felis catus).

    Science.gov (United States)

    Sparkes, Andrew H; Bessant, Claire; Cope, Kevin; Ellis, Sarah L H; Finka, Lauren; Halls, Vicky; Hiestand, Karen; Horsford, Kim; Laurence, Christopher; MacFarlaine, Ian; Neville, Peter F; Stavisky, Jenny; Yeates, James

    2013-09-01

    GUIDELINES RATIONALE: Cats are among the most commonly kept domestic pets, and coexist with humans in a variety of different circumstances. Cats are sentient beings and, as such, humans have a responsibility for cat welfare where humans and cats coexist. Because cats reproduce efficiently, measures to control populations are frequently needed, but these should be based on ethical and humane approaches. These consensus guidelines from the International Society of Feline Medicine's Welfare Advisory Panel provide a framework for the approach to welfare and population control measures, primarily among unowned cats and those going through a homing programme.

  11. Surgical Management of Recurrent Rectal Prolapse in a Domestic Kitten (Felis catus – Case report

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    Shongsir Warson Monsang

    2014-07-01

    Full Text Available A case of recurrent rectal prolapse in a domestic 3 months old kitten was presented to the Referral Veterinary Polyclinic, Indian Veterinary Research Institute, Izatnagar, with the complaint of protruded tubular pink mass through the anus along with mild signs of mucosal necrosis since last 5 days. Reduction and retention of the prolapsed mass by conventional purse-string suture technique was attempted earlier on 2 occasions by the attending veterinarian with no good results. Hence, the case was referred for second opinion and treatment. Surgical reduction was done under ketamine-xylazine anesthesia and the animal recovered uneventfully in 7 days.

  12. Albinism in the domestic cat (Felis catus) is associated with a tyrosinase (TYR) mutation

    Science.gov (United States)

    Imes, DL; Geary, LA; Grahn, RA; Lyons, LA

    2006-01-01

    Summary Albino phenotypes are documented in a variety of species including the domestic cat. As albino phenotypes in other species are associated with tyrosinase (TYR) mutations, TYR was proposed as a candidate gene for albinism in cats. An Oriental and Colourpoint Shorthair cat pedigree segregating for albinism was analysed for association with TYR by linkage and sequence analyses. Microsatellite FCA931, which is closely linked to TYR and TYR sequence variants were tested for segregation with the albinism phenotype. Sequence analysis of genomic DNA from wild-type and albino cats identified a cytosine deletion in TYR at position 975 in exon 2, which causes a frame shift resulting in a premature stop codon nine residues downstream from the mutation. The deletion mutation in TYR and an allele of FCA931 segregated concordantly with the albino phenotype. Taken together, our results suggest that the TYR gene corresponds to the colour locus in cats and its alleles, from dominant to recessive, are as follows: C (full colour) > cb (burmese) ≥ cs (siamese) > c (albino). PMID:16573534

  13. Testosterone increases urinary free felinine, N-acetylfelinine and methylbutanolglutathione excretion in cats (Felis catus)

    NARCIS (Netherlands)

    Hendriks, W.H.; Rutherfurd-Markwick, K.J.; Weidgraaf, K.; Ugarte, C.; Rogers, Q.R.

    2008-01-01

    Two days after castration, urinary free felinine plus N-acetylfelinine decreased 24% in male cats, but, by day 5, the concentration had not decreased to that routinely found in males that have been castrated for several months. In a second experiment, three groups of castrated adult male cats

  14. Seasonal variation in the voluntary food intake of domesticated cats (Felis catus.

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    Samuel Serisier

    Full Text Available There are numerous reports about seasonal cycles on food intake in animals but information is limited in dogs and cats. A 4-year prospective, observational, cohort study was conducted to assess differences in food intake in 38 ad-libitum-fed adult colony cats, of various breeds, ages and genders. Individual food intake was recorded on a daily basis, and the mean daily intake for each calendar month was calculated. These data were compared with climatic data (temperature and daylight length for the region in the South of France where the study was performed. Data were analysed using both conventional statistical methods and by modelling using artificial neural networks (ANN. Irrespective of year, an effect of month was evident on food intake (P<0.001, with three periods of broadly differing intake. Food intake was least in the summer months (e.g. June, to August, and greatest during the months of late autumn and winter (e.g. October to February, with intermediate intake in the spring (e.g. March to May and early autumn (e.g. September. A seasonal effect on bodyweight was not recorded. Periods of peak and trough food intake coincided with peaks and troughs in both temperature and daylight length. In conclusion, average food intake in summer is approximately 15% less than food intake during the winter months, and is likely to be due to the effects of outside temperatures and differences in daylight length. This seasonal effect in food intake should be properly considered when estimating daily maintenance energy requirements in cats.

  15. Detection of antibodies against Leishmania infantum in cats (Felis catus) from the State of Pernambuco, Brazil.

    Science.gov (United States)

    Silva, Rita de Cássia Nascimento; Ramos, Rafael Antonio Nascimento; Pimentel, Danillo de Souza; Oliveira, Gênova Maria de Azevedo; Carvalho, Gílcia Aparecida de; Santana, Marília de Andrade; Faustino, Maria Aparecida da Glória; Alves, Leucio Câmara

    2014-01-01

    Little information is available concerning infection by Leishmania infantum in cats. Therefore, the aim of this study was to perform a serological study in domestic cats. Serum samples (n=153) obtained from animals living in the Cities of Recife and Petrolina, State of Pernambuco, Brazil, were tested by ELISA/S7® (Biogene). Anti-L. infantum antibodies were detected in 3.9% (6/153) of the cats. All seroreagent animals were from Petrolina. These results serve as an important alert, and future studies are needed to better understand the possible role of cats in the epidemiology of visceral leishmaniasis (VL) in this area.

  16. In vitro fertilizing potential of urethral and epididymal spermatozoa collected from domestic cats (Felis catus).

    Science.gov (United States)

    Prochowska, S; Niżański, W

    2017-03-28

    The aim of this study was to provide a comparative analysis of in vitro fertilizing potential of frozen-thawed urethral and epididymal feline spermatozoa. Both types of semen were collected from 7 cats and cryopreserved in liquid nitrogen. To perform in vitro fertilization, both urethral and epididymal samples from the same individual were thawed and spermatozoa were co-incubated with in vitro matured cat oocytes. Obtained embryos were cultured in vitro for 7 days in a commercial medium. Cleavage rate, morula rate and blastocyst rate were calculated. Experiment was run in 10 replicates. The examined parameters showed no significant differences between urethral and epididymal spermatozoa (p>0.05). Cleavage rate and embryo's development were highly variable between replicates, even for the different sperm samples collected from one individual. There was no significant correlation between fertilizing capacity of two types of spermatozoa collected from the same male. In this study we confirmed that cryopreserved urethral spermatozoa have equally good fertilizing potential as epididymal ones, and both can be successfully used for in vitro fertilization in cats with the use of commercial medium.

  17. A Mutation in LTBP2 Causes Congenital Glaucoma in Domestic Cats (Felis catus.

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    Markus H Kuehn

    Full Text Available The glaucomas are a group of diseases characterized by optic nerve damage that together represent a leading cause of blindness in the human population and in domestic animals. Here we report a mutation in LTBP2 that causes primary congenital glaucoma (PCG in domestic cats. We identified a spontaneous form of PCG in cats and established a breeding colony segregating for PCG consistent with fully penetrant, autosomal recessive inheritance of the trait. Elevated intraocular pressure, globe enlargement and elongated ciliary processes were consistently observed in all affected cats by 8 weeks of age. Varying degrees of optic nerve damage resulted by 6 months of age. Although subtle lens zonular instability was a common feature in this cohort, pronounced ectopia lentis was identified in less than 10% of cats examined. Thus, glaucoma in this pedigree is attributed to histologically confirmed arrest in the early post-natal development of the aqueous humor outflow pathways in the anterior segment of the eyes of affected animals. Using a candidate gene approach, significant linkage was established on cat chromosome B3 (LOD 18.38, θ = 0.00 using tightly linked short tandem repeat (STR loci to the candidate gene, LTBP2. A 4 base-pair insertion was identified in exon 8 of LTBP2 in affected individuals that generates a frame shift that completely alters the downstream open reading frame and eliminates functional domains. Thus, we describe the first spontaneous and highly penetrant non-rodent model of PCG identifying a valuable animal model for primary glaucoma that closely resembles the human disease, providing valuable insights into mechanisms underlying the disease and a valuable animal model for testing therapies.

  18. Predictors of proximity to others in colony housed shelter cats (Felis silvestris catus

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    Malini Suchak

    2016-12-01

    Full Text Available Colony housing of cats allows shelters to maximize the number of cats housed in limited space. Most research on colony-housed cats examines stress in relation to group size or enclosure size. While this is important for evaluating welfare, it is equally important to understand how cats are interacting socially in these colonies. We observed 259 adult cats housed in groups of two to eight individuals. Scan samples were used to assess how frequently individual cats were in close proximity to other cats. These data were used to measure individual differences in sociability and patterns of proximity to certain partners. We used information about the past history of the cat, which was collected upon admission to the shelter to identify predictors of time spent in proximity. There was a high degree of inter-individual variability in sociability. Strays tended to spend less time in proximity to other cats, and this effect was most pronounced in females.However, none of the information collected upon admission predicted patterns of proximity to certain partners, or which cats spent time in association witheach other. Future studies should explore the implications of differences in sociability by associating observations of social behavior and stress behaviors

  19. The XY Body of the Cat (Felis catus): Structural Differentiations and Protein Immunolocalization.

    Science.gov (United States)

    Sciurano, Roberta B; De Luca, Geraldine; Rahn, I Mónica; Solari, Alberto J

    2017-01-01

    The heteromorphic X and Y chromosomes behave in a special way in mammalian spermatocytes; they form the XY body and synapse only partially. The aim of this article was to study the origin and the role of the special differentiations in the XY pair of the domestic cat during pachytene by analyzing its fine structural characteristics and the immunolocalization of the main meiotic proteins SYCP3, SYCP1, SYCE3, SMC3, γ-H2AX, BRCA1, H3K27me3, and MLH1. The cat XY body shows particularly striking structures: an extreme degree of axial fibrillation in late pachynema and a special location of SYCP3-containing fibrils, bridging different regions of the main X axis, as well as one bridge at the inner end of the pairing region that colocalizes with the single mandatory MLH1 focus. There are sequential changes, first bullous expansions, then subdivision into fibrils, all involving axial thickening. The chromatin of the XY body presents the usual features of meiotic sex chromosome inactivation. An analysis of the XY body of many eutherians and metatherians suggests that axial thickenings are primitive features. The sequential changes in the mass and location of SYCP3-containing fibers vary among the clades because of specific processes of axial assembly/disassembly occurring in different species. © 2017 S. Karger AG, Basel.

  20. Effect of natural photoperiod on sperm morphology in domestic cat (Felis silvestris catus)

    OpenAIRE

    Núñez Favre, Romina de los Ángeles; Bonaura, María Candela; García, María Florencia; Stornelli, María Cecilia; Sota, Rodolfo Luzbel de la; Stornelli, María Alejandra

    2015-01-01

    El objetivo de este trabajo es evaluar la influencia del fotoperiodo sobre la morfología espermática en el gato doméstico. Se utilizaron 43 gatos mestizos orquiectomizados durante las últimas dos semanas de cada estación para evidenciar el efecto del fotoperiodo sobre la morfología espermática. Los espermatozoides epididimales fueron recuperados mediante la técnica de cutting. Para la evaluación morfológica, se utilizó tinción 15® (Biopur) y se clasificaron las anormalidades según su localiza...

  1. Tuberculose em felinos domésticos (Felis catus no sul do Rio Grande do Sul

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    Daniel M. Alves

    Full Text Available RESUMO: Descrevem-se os aspectos clínico patológicos de quatro casos de tuberculose em felinos domésticos no Sul do Rio Grande do sul. Foi realizado um estudo retrospectivo dos casos diagnosticados como tuberculose em gatos necropsiados no Laboratório Regional de Diagnóstico da Universidade Federal de Pelotas (LRD/UFPel no período de janeiro de 2000 a dezembro de 2014. Em dois casos a amplificação da sequência genética IS6110 específica para Mycobacterium tuberculosis demonstrou que a doença era de origem humana. Os outros dois foram positivos para Mycobacterium spp. Os sinais clínicos caracterizaram-se por emagrecimento progressivo, anorexia e dispneia. As alterações macroscópicas evidenciadas eram de caquexia, aumento de volume dos linfonodos submandibulares com áreas focais de aspecto caseoso ao corte. Nos pulmões havia áreas multifocais a coalescentes amareladas de aspecto caseoso, discretamente elevadas e firmes na superfície pleural. Histologicamente havia broncopneumonia e linfadenite granulomatosas. A coloração de Ziehl-Neelsen evidenciou a presença de bacilos álcool-ácidos resistentes. Houve imunomarcação positiva para micobactéria pela técnica de imuno-histoquímica. Alerta-se para a importância da tuberculose felina como um problema de saúde pública pois gatos infectados podem servir de fonte para a disseminação das micobactérias no ambiente, além de serem sentinelas para a ocorrência da enfermidade em seres humanos.

  2. Isolation and genetic characterization of Toxoplasma gondii from black bears (Ursus americanus), bobcats (Felis rufus), and feral cats (Felis catus) from Pennsylvania

    Science.gov (United States)

    Toxoplasma gondii infects virtually all warm-blooded hosts worldwide. Recently, attention has been focused on the genetic diversity of the parasite to explain its pathogenicity in different hosts. It has been hypothesized that interaction between feral and domestic cycles of T. gondii may increase u...

  3. Aspectos histológicos e morfométricos dos testículos de gatos domésticos (Felis catus Histological and morphometric evaluation of the testes of cats (Felis catus

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    Carlos A.O. Silva

    2009-04-01

    Full Text Available Nesta pesquisa foram obtidos dados histológicos e morfométricos comparativos sobre os testículos de gatos, pós-orquiectomia, divididos em dois grupos: Grupo 1, gatos com até 1 ano de idade e Grupo 2, animais acima de 1 ano. Verificou-se que: (1 aos 4 meses de idade os túbulos seminíferos apresentaram-se pouco desenvolvidos e com ausência de luz, epitélio seminífero baixo, células de Sertoli indiferenciadas e tecido intersticial escasso; (2 aos 5 meses os túbulos seminíferos começaram a se diferenciar com aumento do diâmetro e luz tubulares e as demais estruturas permaneceram semelhantes à observação anterior; (3 aos 6-7 meses ocorreu o início da espermatogênese e espermiogênese; as células de Leydig apareceram maiores, poliédricas com citoplasma vacuolizado e núcleo claro, e tecido intersticial esparso com poucos vasos sangüíneos; (4 os animais com 1 ano de idade apresentaram morfologia testicular igual à do animal adulto, com túbulos seminíferos de maior diâmetro, epitélio germinativo alto e luz tubular pequena, as células de Leydig aparecendo poliédricas, com dimensões variadas, citoplasma vacuolizado, núcleo claro e nucléolo evidente, e espaço intertubular seminífero variado com vasos sanguíneos, predominantemente evidentes; (5 no Grupo 1 o diâmetro médio dos túbulos seminíferos foi de 160,58µm e no Grupo 2 foi de 185,94µm, sendo os valores médios significantes entre si; (6 a altura média do epitélio seminífero foi de 49,51µm para o Grupo 1 e de 63,29µm para o Grupo 2, estaticamente significantes; (7 os maiores valores mensurados foram obtidos para os gatos do Grupo 2, por serem gatos adultos e portanto com os órgãos reprodutores funcionais.This paper deals with a comparative histologic and morphometric study of the testes of domestic cats distributed into two groups: Group 1, cats until 1 year of age, and Group 2, cats over 1 year. It was found that: (1 at 4 months of age the seminiferous tubules were poorly developed, appeared as seminiferous cords without lumen, lined by a low epithelium, and showed undifferentiated Sertoli cells and scarce interstitial tissue; (2 at 5 months the seminiferous tubules began to differentiate with increase in tubular diameter and lumen, the other tubular structures remaining similar to those previous referred; (3 at 6 and 7 months of age spermatocytogenesis began to appear, Leydig cells were large, polyhedral in shape, with vacuolated cytoplasm and clear nuclei, resting on a sparse interstitial tissue with few blood vessels; (4 1-year-old cats showed testicular histological features of an adult animal, had seminiferous tubules of large diameter and high seminiferous epithelium with small lumen, and Leydig cells of different sizes, with polyhedral shape, vacuolated cytoplasm, clear nuclei and evident nucleoli resting in a sparse interstitial tissue with some blood vessels; (5 in Group 1 the average diameter of the seminiferous tubules was 160.58µm, and 185.94µm in Group 2; (6 the height of the seminiferous epithelium was 49.51µm for Group 1 and 63.29µm for Group 2; (7 the largest measures of the analyzed parameters were found in animals of Group 2, with functional reproductive organs.

  4. TOPOGRAFIA DAS INTUMESCÊNCIAS CERVICAL E LOMBAR EM GATOS SEM RAÇA DEFINIDA (Felis catus Linnaeus, 1758 TOPOGRAPHY OF THE CERVICAL AND LUMBAR INTUMESCENSES IN THE DOMESTIC WITHOUT RACE CAT (Felis catus Linnaeus, 1758

    Directory of Open Access Journals (Sweden)

    Rosana Marques Silva

    2008-12-01

    Full Text Available Foram obtidas informações sobre as intumescências cervical (IC e lombar (IL de gatos sem raça definida, analisando trinta animais, post-mortem, adultos. Removeram-se a pele e a musculatura dorsal da coluna vertebral para expor a medula espinhal e seus envoltórios por meio de secção dos arcos vertebrais, evidenciando-se a IC e a IL. Fez-se a mensuração da IC e IL e sua relação com as vértebras cervicais (C, torácicas (T e lombares (L para obter a esqueletopia. A IC apresentou-se com o tamanho variando de 3,30-8,00 cm, sendo que em nove animais (30,00 ± 8,36% este foi entre 5,00-5,50 cm. A IL apresentou-se com o tamanho variando de 2,90-5,70 cm, e em 21 animais (70,00 ± 8,36% este foi de 3,00-4,50 cm. A esqueletopia dessas estruturas foi variável: em dezesseis animais (53,33 ± 9,10% a IC iniciou-se na vértebra C3 e a IL, em 23 animais (76,67 ± 7,72% na L4. Os finais da IC e da IL ocorriam em doze animais (40,00 ± 8,94% na vértebra T1 e em 24 (80,00 ± 7,30% ao nível da vértebra L6, respectivamente.

    PALAVRAS-CHAVES: Gatos, medula espinhal, intumescência, topografia There were analyzed the cervical (CI and lumbar intumescences (IL of 30 post mortem domestic without race cats of both sexes. The dorsal skin and muscles from the vertebral column were removed to expose the spinal cord and its wrappers were visualized when the vertebral arcs were sectioned, exposing the CI and LI. The CI and LI where measured up and their relationship with cervical (C, thoracic (T and lumbar (L vertebrae were analyzed to get their skeletopy. The length of the CI presented a variation from 3.30-8.00 cm, with a higher frequency of 9 animals (30.00 ± 8.36% presenting 5.00-5.50 cm. The length of the LI presented a variation from 2.90-5.70 and the higher frequency observed was 21 animals (70.00 ± 8.36% presenting 3.00-4.50 cm. Their skeletopy were also variable: in 16 animals (53.33 ± 9.10% the CI began at the C3 and the LI began at the L4 in 23 animals (76.67 ± 7.72%. Their ends were also variable, since the CI and the LI ended in 12 animals (40.00 ± 8.94% the T1 and in 24 (80.00 ± 7.30% at the L6 vertebrae, respectively.

    KEY WORDS: Cats, intumescences, spinal cord, topography.

  5. LC-MS/MS quantification of felinine metabolites in tissues, fluids, and excretions from the domestic cat (Felis catus).

    Science.gov (United States)

    Futsuta, Ayami; Hojo, Wataru; Miyazaki, Tamako; Yamashita, Tetsuro; Miyazaki, Masao

    2018-01-01

    Domestic cat urine contains large concentrations of the unusual amino acid, felinine (2-amino-7-hydroxy-5,5-dimethyl-4-thiaheptanoic acid). A felinine derivative, 3-mercapt-3-methylbutanol is a potential scent signal for letting other animals know that the scent owners are cats. 3-Methylbutanol-glutathione (MBG) is an upstream precursor of the biosynthetic pathway of felinine that may be produced in hepatocytes by conjugation of glutathione with isopentenyl pyrophosphate, an intermediate for cholesterol biosynthesis. However, little evidence exists to support the biosynthesis of MBG in the liver. This study examined the distribution of metabolites of the felinine biosynthetic pathway in multiple tissues, body fluids, and excretions of cats. MBG, the felinine precursor, 3-methylbutanol-cysteinylglycine (MBCG), felinine, and felinine N-acetyl derivative were quantified by liquid chromatography-electron spray ionization-tandem mass spectrometry. All compounds were detected in cat serum. In males, MBG and MBCG contents were significantly higher than felinine and N-acetylfelinine contents. MBG was detected in multiple tissues, including the salivary gland, heart, liver, spleen, gut, kidney, bladder, adipose tissue, and muscle. Sex differences in MBG levels were observed in the liver and other tissues. Felinine and N-acetylfelinine were also detected in those tissues. Furthermore, we detected all compounds in cat bile and fecal samples, indicating that felinine is excreted into the feces via bile from the liver. We conclude that MBG is synthesized in several tissues in a sex-dependent manner. These findings improve our understanding of felinine metabolism and function in cats. Copyright © 2017 Elsevier B.V. All rights reserved.

  6. A Preliminary Study on the Helminth Fauna in Necropsied Stray Cats (Felis catus in Beni-Suef, Egypt

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    Khaled Mohamed El-Dakhly

    2017-10-01

    Full Text Available Stray cats play a crucial role in the epidemiology of endoparasites, particularly helminths, due to predating a wide range of both vertebrate and invertebrate hosts, often of veterinary and zoonotic importance. Therefore, a total of 62 stray cats were necropsied in Beni-Suef province, Egypt and examined for helminth parasites. The overall prevalence of infection was 87.0%. The recovered helminths consisted of 10 species of trematodes (Heterophyes heterophyes, Pygidiopsis summa, H. nocens, Echinochasmus liliputanus, Alaria sp., Procerovum varium, Ascocotyle sp., Haplorchis sp., Prohemistomum vivax, Euparadistomum herpestesi, five cestodes (Dipylidium caninum, Diplopylidium acanthoterta, D. nolleri, Joyeuxiella sp. and Taenia taeniaeformis, and two nematodes (Toxascaris leonina and larvae of Anisakis simplex. The most prevalent helminths were Dipylidium caninum (62.9%, Toxascaris leonina (33.8%, Diplopylidium nolleri (22.5% and Echinochasmus liliputanus (6.45%. Thirty (48.39% cats were co-infected by one species, 22 (35.48% by two and three (4.84% by more than two species. It has been found that cats aged more than 3 years were the most infected. Both male and female cats were parasitized. The infection was the most prevalent in both summer and autumn. In conclusion, veterinarians must highlight more attention towards both stray and domestic cats, as they are considered reservoir hosts for a wide host range of parasites, particularly helminths, and the zoonotic importance of such parasites should be taken on consideration.

  7. Seasonal and age effects on energy requirements in domestic short-hair cats (Felis catus) in a temperate environment.

    Science.gov (United States)

    Bermingham, E N; Weidgraaf, K; Hekman, M; Roy, N C; Tavendale, M H; Thomas, D G

    2013-06-01

    There is little information known about the energy requirements of cats in temperature climates. Energy requirement of domestic short-haired cats was determined using three groups of mixed gender - old kept outside (approximately 9.9 years of age; 4.8 kg; n = 9), young kept outside (approximately 3.1 years of age; 3.9 kg; n = 8) or young kept inside (approximately 3.1 years of age; 3.9 kg; n = 8). Cats were housed individually for 5 weeks during summer (18.5 ± 0.5 °C) and winter (8.5 ± 0.4 °C) and were fed a commercially available maintenance diet ad libitum. In both periods, energy expenditure was determined from the rates of (2) H and (18) O elimination for blood H2 O over a 12 day period, from a doubly labelled water bolus (2) H2 O (0.7 g/kg BW) and H2 (18) O (0.13 g/kg BW) administered intravenously. During the summer period, macronutrient digestibility was determined. Older cats had a reduction (p energy (approximately 8%) and protein (6%). There was a significant effect of age and season on energy intake and energy expenditure. While lean mass was affected by age and season, there was no effect of age or season on energy expenditure when expressed as a proportion of lean mass. Possible seasonal differences in nutrient digestibility may explain these results. © 2012 Blackwell Verlag GmbH.

  8. Coinfection by Toxoplasma gondii and Leishmania spp. in domestic cats (Felis catus in State of Mato Grosso do Sul

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    Audrey Rennó Campos Braga

    2014-12-01

    Full Text Available Introduction Leishmaniasis and toxoplasmosis are important to public health. Methods Antibodies for Toxoplasma gondii and Leishmania spp. were evaluated in cats from Campo Grande, State of Mato Grosso do Sul, Brazil, a region endemic for canine visceral leishmaniasis. Serum samples from 50 asymptomatic cats were titrated for T. gondii by the immunofluorescence antibody test and modified agglutination test and for Leishmania spp. by the immunofluorescence antibody test. Results These two agents coinfected two (4% of the 50 tested animals. Conclusions These findings demonstrate the concomitant presence of two important zoonoses in cats from Brazilian endemic regions for canine visceral leishmaniasis.

  9. Feline patent Toxoplasma-like coccidiosis among feral cats (Felis catus) in Doha city, Qatar and its immediate surroundings.

    Science.gov (United States)

    Abu-Madi, Marawan A; Behnke, Jerzy M

    2014-09-01

    Doha city has a high feral cat population and studies of hospital records in Doha have shown that human toxoplasmosis also occurs. Clearly, there is a need to understand the role of cats as vectors of human toxoplasmosis in the city and as a first step we assessed the extent of patent Toxoplasma-like coccidial infections among feral cats. Oocysts in cat faeces were detected between June 2008 and April 2010, from a range of locations radiating out of the city centre in concentric semi circular/elliptic rings and by north, west and south divisions within each of the rings. In total 4,652 cats were sampled and overall prevalence of oocysts was 9.1%. Prevalence was 10.1% in the first summer, and then dropped to 8.4% in the following winter and further to 6.8% in the next summer before rising to 10.6% in the final winter of the study; this interaction between annual period and season was significant. There were also significant changes in prevalence across each of the consecutive months of the study, but no clear pattern was evident. Prevalence did not vary significantly by city sector and there was no difference in prevalence between the host sexes. We conclude therefore, that despite minor and significant perturbations, the prevalence of patent Toxoplasma-like coccidial infections among cats in Doha is remarkably stable throughout the year, across years and spatially within the city's districts.

  10. Anatomia dental de cães (Canis familiaris) e gatos (Felis catus). Considerações cirúrgicas

    OpenAIRE

    Juliana Kowalesky

    2005-01-01

    Com a rápida evolução da odontologia veterinária na última década, faz-se crescente a busca pelo conhecimento da área e a busca por referências bibliográficas, porém nota-se que as informações existentes de uma área essencial, a anatomia, estão limitadas a descrições básicas. Sabe-se que o conhecimento da anatomia do sistema estomatognático é de fundamental importância para que clínicos e cirurgiões possam diagnosticar e instituir tratamento adequado e preciso. Apesar dos livros de odontologi...

  11. A Survey of Public Opinion on Cat (Felis catus) Predation and the Future Direction of Cat Management in New Zealand.

    Science.gov (United States)

    Walker, Jessica K; Bruce, Stephanie J; Dale, Arnja R

    2017-07-03

    Cat predation is a prominent issue in New Zealand that provokes strong and opposing views. We explored, via 1011 face-to-face questionnaires, public opinion on (a) support for a National Cat Management Strategy (78% support); (b) concern regarding predation of wildlife by owned and un-owned cats (managed stray, unmanaged stray, and feral cats); (c) the acceptability of management techniques for owned cats; and (d) the acceptability of population management techniques for un-owned cats. The highest concern was expressed regarding the predation of non-native and native wildlife by feral cats (60 and 86% repectively), followed by unmanaged stray cats (59 and 86% respectively), managed stray cats (54 and 82% respectively), and finally owned cats (38 and 69% repectively). Limits to the number of cats owned and cat restriction zones received high levels of support (>65%), and compulsory microchipping, Council registration, and de-sexing were supported by the majority (>58%). Public support of population control methods for unowned cats was explored, and the influence of participant demographic variables on responses is described. These findings provide insight into public opinion regarding the management of cats in New Zealand, which should be considered during the development of legislation in this area.

  12. Post-weaning diet affects faecal microbial composition but not selected adipose gene expression in the cat (Felis catus)

    National Research Council Canada - National Science Library

    Bermingham, Emma N; Kittelmann, Sandra; Young, Wayne; Kerr, Katherine R; Swanson, Kelly S; Roy, Nicole C; Thomas, David G

    2013-01-01

    The effects of pre- (i.e., gestation and during lactation) and post-weaning diet on the composition of faecal bacterial communities and adipose expression of key genes in the glucose and insulin pathways were investigated in the cat...

  13. Anticipation is differently expressed in rats (Rattus norvegicus) and domestic cats (Felis silvestris catus) in the same Pavlovian conditioning paradigm

    NARCIS (Netherlands)

    Bos, van den R.; Meijer, M.K.; Renselaar, van J.; Harst, van der J.E.; Spruijt, B.M.

    2003-01-01

    In rats (Rattus norvegicus) anticipation to an oncoming food reward in an appetitive Pavlovian conditioning procedure is expressed as an increase of behavioural transitions, i.e. hyperactivity. This behaviour might be related to the spontaneous appetitive behaviour of animals in relation to oncoming

  14. The effect of cumulus cells on domestic cat (Felis catus) oocytes during in vitro maturation and fertilization.

    Science.gov (United States)

    Sowińska, N; Frankowska, K; Filipczyk, A; Adamaszek, A; Nalik, K; Fic, K; Pietsch-Fulbiszewska, A

    2017-04-01

    The aim of this study was to evaluate the effect of co-culture of denuded oocytes with cumulus cells (CC) or cumulus-oocyte complexes (COCs) on in vitro maturation (IVM) and in vitro fertilization (IVF). Immature oocytes were collected from ovaries of domestic cats following a routine ovariectomy. Oocytes were matured in vitro for 24 hr within four groups: (i) denuded oocytes (DO), (ii) DO co-cultured with CC, (iii) DO co-cultured with COC and (iv) COC as a control group. In further experiments, COCs were matured in vitro for 24 hr, and then, oocytes were randomly divided into four groups as previously described and fertilized in vitro. Embryos were cultured for up to 7 days. At the end of each experiment, oocytes/embryos were stained with Hoechst 33342 solution and observed under an inverted fluorescence microscope. The results of oocyte maturation showed that their meiotic competence decreased significantly in all experimental groups, compared to the control group. The maturation rates were approximately 45%, 24%, 43% and 76% in experiment 1, and 21%, 14%, 33% and 50% in experiment 2 in groups (i), (ii), (iii) and (iv), respectively. Examination of in vitro fertilization revealed that embryos developed up to the morula stage in all experimental groups. DO and oocytes cultured with COC during fertilization showed a lower cleavage rate-36% and 25% as opposed to those co-cultured with loose CC and the control group-43% and 42%, respectively. Results of this study indicate that cumulus cells connected with an oocyte into a cumulus-oocyte complex are irreplaceable for the maturation of domestic cat oocyte, but that the addition of loose CC may be beneficial for IVF. © 2016 Blackwell Verlag GmbH.

  15. A Survey of Public Opinion on Cat (Felis catus) Predation and the Future Direction of Cat Management in New Zealand

    Science.gov (United States)

    Walker, Jessica K.; Bruce, Stephanie J.; Dale, Arnja R.

    2017-01-01

    Simple Summary The need to balance the benefits of cat ownership with the prevention of wildlife predation in New Zealand evokes strong and opposing views. This paper evaluates public concern for wildlife predation by four categories of cats; owned cats, managed-stray cats, unmanaged-stray cats, and feral cats. In addition, public support for a National Cat Management Strategy and a range of management techniques are investigated. Although the participants expressed concern regarding wildlife predation by all four categories of cats, the highest levels of concern were predation by feral cats, followed by unmanaged stray cats, then managed stray cats, and finally owned cats. The large majority of participants were found to support the implementation of a National Cat Management Strategy. Management techniques for owned cats that obtained public support included; cat exclusion zones, limits on ownership numbers, microchipping, Council registration, and de-sexing. Trap-Neuter-Return (TNR) was the favoured management technique for managed stray cats, while TNR and lethal management techniques were equally favoured for unmanaged stray cats. Lethal control methods were favoured for feral cats. The findings presented in this paper will be useful to consider during the development of legislation relating to cat management and predation in New Zealand. Abstract Cat predation is a prominent issue in New Zealand that provokes strong and opposing views. We explored, via 1011 face-to-face questionnaires, public opinion on (a) support for a National Cat Management Strategy (78% support); (b) concern regarding predation of wildlife by owned and un-owned cats (managed stray, unmanaged stray, and feral cats); (c) the acceptability of management techniques for owned cats; and (d) the acceptability of population management techniques for un-owned cats. The highest concern was expressed regarding the predation of non-native and native wildlife by feral cats (60 and 86% repectively), followed by unmanaged stray cats (59 and 86% respectively), managed stray cats (54 and 82% respectively), and finally owned cats (38 and 69% repectively). Limits to the number of cats owned and cat restriction zones received high levels of support (>65%), and compulsory microchipping, Council registration, and de-sexing were supported by the majority (>58%). Public support of population control methods for unowned cats was explored, and the influence of participant demographic variables on responses is described. These findings provide insight into public opinion regarding the management of cats in New Zealand, which should be considered during the development of legislation in this area. PMID:28671609

  16. A Survey of Public Opinion on Cat (Felis catus Predation and the Future Direction of Cat Management in New Zealand

    Directory of Open Access Journals (Sweden)

    Jessica K. Walker

    2017-07-01

    Full Text Available Cat predation is a prominent issue in New Zealand that provokes strong and opposing views. We explored, via 1011 face-to-face questionnaires, public opinion on (a support for a National Cat Management Strategy (78% support; (b concern regarding predation of wildlife by owned and un-owned cats (managed stray, unmanaged stray, and feral cats; (c the acceptability of management techniques for owned cats; and (d the acceptability of population management techniques for un-owned cats. The highest concern was expressed regarding the predation of non-native and native wildlife by feral cats (60 and 86% repectively, followed by unmanaged stray cats (59 and 86% respectively, managed stray cats (54 and 82% respectively, and finally owned cats (38 and 69% repectively. Limits to the number of cats owned and cat restriction zones received high levels of support (>65%, and compulsory microchipping, Council registration, and de-sexing were supported by the majority (>58%. Public support of population control methods for unowned cats was explored, and the influence of participant demographic variables on responses is described. These findings provide insight into public opinion regarding the management of cats in New Zealand, which should be considered during the development of legislation in this area.

  17. Ectoparasitos e helmintos intestinais em Canis familiaris e Felis catus domesticus, da cidade de Lages, SC, Brasil

    OpenAIRE

    Stalliviere, Fernanda Magalhães

    2007-01-01

    Com os objetivos de determinar e comparar a prevalência de ectoparasitos e helmintos intestinais em cães e gatos domiciliados, das regiões central e periférica, da cidade de Lages, SC; de correlacionar aspectos sócio-econômicos e culturais das famílias proprietárias dos animais com a prevalência de ectoparasitos e helmintos intestinais; e de verificar a proporção entre a população humana com a canina e com a felina; no período de dezembro de 2005 a dezembro de 2006, foram aplicados 600 questi...

  18. Seroprevalence and Risk Factors Associated with Seropositivity to Toxoplasma gondii among Stray and Domestic Cats (Felis silvestris catus

    Directory of Open Access Journals (Sweden)

    Christel Bohn T. Garcia

    2014-12-01

    Full Text Available Toxoplasma gondii is a protozoan parasite that causes toxoplasmosis. It is widespread in the environment and infects a variety of warm-blooded animals, causing miscarriages and birth problems. Previous studies in the Philippines have determined the seropositivity of T. gondii in humans. However, the seroprevalence of the parasite among household pets, par ticularly its feline def initive host, remains insufficient . This study aimed to: (1 determine the seroprevalence of T. gondii antibodies among domestic and stray cats in the Philippines; and, (2 to analyze the risk factors associated with seropositivity. Blood samples from 59 domestic and stray cats were collected and tested for T. gondii seropositivity using a commercially available indirect ELISA kit, while pet owners and handlers were given questionnaires about their cats. Thirteen or 22.03% of the cats were seropositive to T. gondii, and risk factor analysis revealed a significant difference between domestic and stray cats with regard to diet (p = 0.026, OR = 8.333, c = 0.299 and domestication (p = 0.039, OR = 5.000, c = 0.276. Cats fed with table food tested 31.43% seropositive compared to the 4.35% of those fed with cat food, whereas 33.33% of the stray cats were seropositive compared to 7.69% for domestic cats. Odds ratio test showed that the risk factors studied were associated with higher likelihood of T. gondii seropositivity. These results implicate diet and environment in the transmission dynamics of T. gondii among cats.

  19. Post-weaning diet affects faecal microbial composition but not selected adipose gene expression in the cat (Felis catus).

    Science.gov (United States)

    Bermingham, Emma N; Kittelmann, Sandra; Young, Wayne; Kerr, Katherine R; Swanson, Kelly S; Roy, Nicole C; Thomas, David G

    2013-01-01

    The effects of pre- (i.e., gestation and during lactation) and post-weaning diet on the composition of faecal bacterial communities and adipose expression of key genes in the glucose and insulin pathways were investigated in the cat. Queens were maintained on a moderate protein:fat:carbohydrate kibbled ("Diet A"; 35:20:28% DM; n  =  4) or high protein:fat:carbohydrate canned ("Diet B"; 45:37:2% DM; n = 3) diet throughout pregnancy and lactation. Offspring were weaned onto these diets in a nested design (n  =  5 per treatment). Faecal samples were collected at wk 8 and 17 of age. DNA was isolated from faeces and bacterial 16S rRNA gene amplicons were analysed by pyrosequencing. RNA was extracted from blood (wk 18) and adipose tissue and ovarian/testicular tissues (wk 24) and gene expression levels determined using RT-qPCR. Differences (Pcomposition of faecal bacteria were observed between pregnant queens fed Diet A or B. However, pre-weaning diet had little effect on faecal bacterial composition in weaned kittens. In contrast, post-weaning diet altered bacterial population profiles in the kittens. Increased (PDiet A compared to those fed Diet B post-weaning. Feeding Diet B pre-weaning increased (PDiet A pre-weaning. Post-weaning diet had no effect on expression levels of target genes. Correlations between the expression levels of genes involved in glucose and insulin pathways and faecal Bacteriodetes and Firmicutes phyla were identified. The reasons for why post-weaning diet affects microbial populations and not gene expression levels are of interest.

  20. Propionate absorbed from the colon acts as gluconeogenic substrate in a strict carnivore, the domestic cat (Felis catus)

    DEFF Research Database (Denmark)

    Verbrugghe, A; Hesta, M; Daminet, S

    2012-01-01

    In six normal-weight and six obese cats, the metabolic effect of propionate absorbed from the colon was assessed. Two colonic infusions were tested in a crossover design with intervals of 4 weeks. The test solution contained 4 mmol sodium propionate per kg ideal body weight in a 0.2% NaCl solutio...

  1. Microspatial genetic heterogeneity and gene flow in stray cats (Felis catus L.): a comparison of coat colour and microsatellite loci.

    Science.gov (United States)

    Say, Ludovic; Bonhomme, François; Desmarais, Eric; Pontier, Dominique

    2003-06-01

    We analysed levels of genetic differentiation between nine local urban colonies of stray cats using eight coat colour and nine microsatellite loci. Both types of markers revealed a strong differentiation between colonies (FST = 0.15 and 0.09 for coat colour and microsatellite loci, respectively). Three coat colour loci showed extreme levels of genetic differentiation comparatively to other loci and are strongly suspected to be under divergent selective pressures. Microsatellite loci showed significant heterozygote deficiency within colonies (FIS = 0.14), suggesting that coat colour loci are not appropriate to investigate genetic structure at a fine scale because coat colour allele frequencies are based on Hardy-Weinberg equilibrium. The reported pattern conformed to that predicted from the social structuring of cat colonies: aggressive exclusion of immigrants, inbreeding and very low dispersal rate.

  2. Common epidemiology of Rickettsia felis infection and malaria, Africa.

    Science.gov (United States)

    Mediannikov, Oleg; Socolovschi, Cristina; Edouard, Sophie; Fenollar, Florence; Mouffok, Nadjet; Bassene, Hubert; Diatta, Georges; Tall, Adama; Niangaly, Hamidou; Doumbo, Ogobara; Lekana-Douki, Jean Bernard; Znazen, Abir; Sarih, M'hammed; Ratmanov, Pavel; Richet, Herve; Ndiath, Mamadou O; Sokhna, Cheikh; Parola, Philippe; Raoult, Didier

    2013-11-01

    This study aimed to compare the epidemiology of Rickettsia felis infection and malaria in France, North Africa, and sub-Saharan Africa and to identify a common vector. Blood specimens from 3,122 febrile patients and from 500 nonfebrile persons were analyzed for R. felis and Plasmodium spp. We observed a significant linear trend (pAlgeria (1%), and highest in rural Senegal (15%). Co-infections with R. felis and Plasmodium spp. and occurrences of R. felis relapses or reinfections were identified. This study demonstrates a correlation between malaria and R. felis infection regarding geographic distribution, seasonality, asymptomatic infections, and a potential vector. R. felis infection should be suspected in these geographical areas where malaria is endemic. Doxycycline chemoprophylaxis against malaria in travelers to sub-Saharan Africa also protects against rickettsioses; thus, empirical treatment strategies for febrile illness for travelers and residents in sub-Saharan Africa may require reevaluation.

  3. Common epidemiology of Rickettsia felis infection and malaria, Africa

    OpenAIRE

    Mediannikov, Oleg; Socolovschi, Cristina; Edouard, Sophie; Fenollar, Florence; Mouffok, Nadjet; Bassene, Hubert; Diatta, Georges; Tall, Adama; Niangaly, Hamidou; Doumbo, Ogobara; Lekana-Douki, Jean Bernard; Znazen, Abir; Sarih, M'Hammed; Ratmanov, Pavel; Richet, Herve

    2013-01-01

    This study aimed to compare the epidemiology of Rickettsia felis infection and malaria in France, North Africa, and sub-Saharan Africa and to identify a common vector. Blood specimens from 3,122 febrile patients and from 500 nonfebrile persons were analyzed for R. felis and Plasmodium spp. We observed a significant linear trend (p

  4. In vitro efficacy of essential oils and extracts of Schinus molle L. against Ctenocephalides felis felis.

    Science.gov (United States)

    Batista, Lilian C De S O; Cid, Yara P; De Almeida, Ana Paula; Prudêncio, Edlene R; Riger, Cristiano J; De Souza, Marco A A; Coumendouros, Katherine; Chaves, Douglas S A

    2016-04-01

    Extracts and essential oils from plants are important natural sources of pesticides. These compounds are considered an alternative to control ectoparasites of veterinary importance. Schinus molle, an endemic species of Brazil, produces a high level of essential oil and several other compounds. The aim of this work was to determinate the chemical composition of extracts and essential oils of S. molle and further to evaluate the activity against eggs and adults of Ctenocephalides felis felis, a predominant flea that infests dogs and cats in Brazil. In an in vitro assay, the non-polar (n-hexane) extract showed 100% efficacy (800 µg cm(-2); LD50 = 524·80 µg cm(-2)) at 24 and 48 h. Its major compound was lupenone (50·25%). Essential oils from fruits and leaves were evaluated, and had 100% efficacy against adult fleas at 800 µg cm(-2) (LD50 = 353·95 µg cm(-2)) and at 50 µg cm(-2) (LD50 = 12·02 µg cm(-2)), respectively. On the other hand, the essential oil from fruits and leaves was not active against flea eggs. This is the first study that reports the insecticidal effects of essential oils and extracts obtained from Schinus molle against Ctenocephalides felis felis.

  5. Integrated morphological and molecular identification of cat fleas (Ctenocephalides felis) and dog fleas (Ctenocephalides canis) vectoring Rickettsia felis in central Europe.

    Science.gov (United States)

    Lawrence, Andrea L; Hii, Sze-Fui; Jirsová, Dagmar; Panáková, Lucia; Ionică, Angela M; Gilchrist, Katrina; Modrý, David; Mihalca, Andrei D; Webb, Cameron E; Traub, Rebecca J; Šlapeta, Jan

    2015-06-15

    Fleas of the genus Ctenocephalides are the most common ectoparasites infesting dogs and cats world-wide. The species Ctenocephalides felis and Ctenocephalides canis are competent vectors for zoonotic pathogens such as Rickettsia felis and Bartonella spp. Improved knowledge on the diversity and phylogenetics of fleas is important for understanding flea-borne pathogen transmission cycles. Fleas infesting privately owned dogs and cats from the Czech Republic (n=97) and Romania (n=66) were subjected to morphological and molecular identification and phylogenetic analysis. There were a total of 59 (60.82%) cat fleas (Ctenocephalides felis felis), 30 (30.93%) dog fleas (Ctenocephalides canis), 7 (7.22%) European chicken fleas (Ceratophyllus gallinae) and 1 (1.03%) northern rat flea (Nosopsyllus fasciatus) collected in the Czech Republic. Both C. canis and C. felis felis were identified in Romania. Mitochondrial DNA sequencing at the cox1 gene on a cohort of 40 fleas revealed the cosmopolitan C. felis felis clade represented by cox1 haplotype 1 is present in the Czech Republic. A new C. felis felis clade from both the Czech Republic and Romania is also reported. A high proportion of C. canis was observed from dogs and cats in the current study and phylogeny revealed that C. canis forms a sister clade to the oriental cat flea Ctenocephalides orientis (syn. C. felis orientis). Out of 33 fleas tested, representing C. felis felis, C. canis and Ce. gallinae, 7 (21.2%) were positive for R. felis using diagnostic real-time PCR targeting the gltA gene and a conventional PCR targeting the ompB gene. No samples tested positive for Bartonella spp. using a diagnostic real-time PCR assay targeting ssrA gene. This study confirms high genetic diversity of C. felis felis globally and serves as a foundation to understand the implication for zoonotic disease carriage and transmission by the flea genus Ctenocephalides. Copyright © 2015 Elsevier B.V. All rights reserved.

  6. Fatal toxoplasmosis in sand cats (Felis margarita).

    Science.gov (United States)

    Pas, An; Dubey, J P

    2008-09-01

    The sand cat (Felis margarita) is a small-sized felid occurring in the United Arab Emirates (UAE). The sand cat captive-breeding program at the Breeding Centre for Endangered Arabian Wildlife in Sharjah, UAE, has until recently been severely compromised by very high newborn mortality rates. Two different pairs of sand cats gave birth, respectively, to one and two litters (with a total of eight kittens) between 1999 and 2006. Seven out of eight kittens died between the third and 21st wk of life. Toxoplasmosis was confirmed as the cause of death in these two litters. Adult cats had high antibody titers to Toxoplasma gondii before pregnancy, suggesting that maternal immunity did not protect the kittens against infection with T. gondii and that maternal immunity might not have prevented transplacental transmission of the parasite. This observation contrasts with what is seen in domestic cats. To date, this is the first report on confirmed fatal toxoplasmosis and prevalence of T. gondii in sand cats.

  7. Optical properties of infrared FELs from the FELI Facility II

    Energy Technology Data Exchange (ETDEWEB)

    Saeki, K.; Okuma, S.; Oshita, E. [Free Electron Laser Institute, Osaka (Japan)] [and others

    1995-12-31

    The FELI Facility II has succeeded in infrared FEL oscillation at 1.91 {mu} m using a 68-MeV, 40-A electron beam from the FELI S-band linac in February 27, 1995. The FELI Facility II is composed of a 3-m vertical type undulator ({lambda}u=3.8cm, N=78, Km a x=1.4, gap length {ge}20mm) and a 6.72-m optical cavity. It can cover the wavelength range of 1-5{mu}m. The FELs can be delivered from the optical cavity to the diagnostics room through a 40-m evacuated optical pipeline. Wavelength and cavity length dependences of optical properties such as peak power, average power, spectrum width, FEL macropulse, FEL transverse profile are reported.

  8. Observations on the lynx Felis caracal in the Bedford district

    African Journals Online (AJOL)

    Observations on the lynx Felis caracal in the. Bedford district. J.A. Pringle and V.L. Pringle. Specimens were collected in the Bedford district and adjoining areas. A method of hunting lynxes with a pack of hounds is described. Data collected from 108 specimens over a period of. 3! years are analysed. Various aspects of the ...

  9. Genomic diversification in strains of Rickettsia felis Isolated from different arthropods.

    Science.gov (United States)

    Gillespie, Joseph J; Driscoll, Timothy P; Verhoeve, Victoria I; Utsuki, Tadanobu; Husseneder, Claudia; Chouljenko, Vladimir N; Azad, Abdu F; Macaluso, Kevin R

    2014-12-04

    Rickettsia felis (Alphaproteobacteria: Rickettsiales) is the causative agent of an emerging flea-borne rickettsiosis with worldwide occurrence. Originally described from the cat flea, Ctenocephalides felis, recent reports have identified R. felis from other flea species, as well as other insects and ticks. This diverse host range for R. felis may indicate an underlying genetic variability associated with host-specific strains. Accordingly, to determine a potential genetic basis for host specialization, we sequenced the genome of R. felis str. LSU-Lb, which is an obligate mutualist of the parthenogenic booklouse Liposcelis bostrychophila (Insecta: Psocoptera). We also sequenced the genome of R. felis str. LSU, the second genome sequence for cat flea-associated strains (cf. R. felis str. URRWXCal2), which are presumably facultative parasites of fleas. Phylogenomics analysis revealed R. felis str. LSU-Lb diverged from the flea-associated strains. Unexpectedly, R. felis str. LSU was found to be divergent from R. felis str. URRWXCal2, despite sharing similar hosts. Although all three R. felis genomes contain the pRF plasmid, R. felis str. LSU-Lb carries an additional unique plasmid, pLbaR (plasmid of L. bostrychophila associated Rickettsia), nearly half of which encodes a unique 23-gene integrative conjugative element. Remarkably, pLbaR also encodes a repeats-in-toxin-like type I secretion system and associated toxin, heretofore unknown from other Rickettsiales genomes, which likely originated from lateral gene transfer with another obligate intracellular parasite of arthropods, Cardinium (Bacteroidetes). Collectively, our study reveals unexpected genomic diversity across three R. felis strains and identifies several diversifying factors that differentiate facultative parasites of fleas from obligate mutualists of booklice. © The Author(s) 2014. Published by Oxford University Press on behalf of the Society for Molecular Biology and Evolution.

  10. Isoflavone metabolism in domestic fcats (Felis catus): comparison of plasma metabolites detected after ingestion of two different dietary forms of genistein daidzein

    NARCIS (Netherlands)

    Whitehouse-Tedd, K.; Cave, N.J.; Ugarte, C.E.; Waldron, L.A.; Prasain, J.K.; Arabshahi, A.; Barnes, S.; Hendriks, W.H.; Thomas, D.G.

    2013-01-01

    Some felid diets contain isoflavones but the metabolic capacity of cats towards isoflavones is relatively unknown, despite the understanding that isoflavones have divergent biological potential according to their metabolite end-products. The objective of this study was to determine the plasma

  11. Development and evaluation of the Fe-BARQ: A new survey instrument for measuring behavior in domestic cats (Felis s. catus).

    Science.gov (United States)

    Duffy, Deborah L; de Moura, Roseana T Diniz; Serpell, James A

    2017-08-01

    A questionnaire instrument for obtaining quantitative behavioral evaluations of pet cats from cat owners was developed and validated. Exploratory Factor Analysis of 2608 questionnaire responses to 149 behavioral questions/items extracted a total of 23 distinct factors that measured most of the more common dimensions of cat behavior. Seventeen of the 23 factors demonstrated adequate-high internal reliability (Cronbach's alpha=0.712-0.923). Questionnaire validation was accomplished by determining: (a) whether owners' subjective ratings of the severity of their cat's behavior problems were associated with cats' actual scores on expected questionnaire factors, (b) whether expected associations between specific demographic and/or lifestyle characteristics and behavior were confirmed by cats' factor or item scores on the questionnaire, and (c) whether breed rankings based on owner-reported factor scores matched those previously derived from the opinions of experts (veterinarians). The results of these various tests confirmed the overall construct validity of the questionnaire. Copyright © 2017 The Authors. Published by Elsevier B.V. All rights reserved.

  12. Distribución de marcadores fenotípicos en poblaciones de gato doméstico (Felis catus, Felidae en el Departamento del Meta, Colombia

    Directory of Open Access Journals (Sweden)

    Rocío del Pilar Solano Padilla

    2006-01-01

    en el Meta, aunque no presentan un proceso de estructuración marcado, no llegan a constituirse en un único pool genético establecido dentro de Colombia, ya que presentan relación con otras poblaciones colombianas de presunto origen español, tanto con influencia atlántica como con influencia pacífica.

  13. When cats' ways of life interact with their viruses: a study in 15 natural populations of owned and unowned cats (Felis silvestris catus).

    Science.gov (United States)

    Hellard, E; Fouchet, D; Santin-Janin, H; Tarin, B; Badol, V; Coupier, C; Leblanc, G; Poulet, H; Pontier, D

    2011-09-01

    In natural populations, virus circulation is influenced by host behavior and physiological characteristics. Cat populations exhibit a great variability in social and spatial structure, the existence of different ways of life within a same population may also result in different epidemiological patterns. To test this hypothesis, we used a logistic regression to analyze the risk factors of Feline immunodeficiency virus (FIV), feline herpes virus (FHV), feline calicivirus (FCV), and feline parvovirus (FPV) infection in owned (fed and sheltered) and unowned (neither fed nor sheltered, unsocialized) cats living in a rural environment in the North Eastern part of France. A serological survey was carried out in 492 non-vaccinated and non-sterilized individuals from 15 populations living in the same area. The prevalence of feline leukemia virus (FeLV) was also studied, but too few were infected to analyze the risk factors of this virus. For each virus, the epidemiological pattern was different in owned and unowned cats. Unowned cats were more frequently infected by directly transmitted viruses like FIV, FHV and FCV (21.22%, 67.66%, 86.52% in unowned cats vs 9.55%, 53.88%, 77.18% in owned cats, respectively), a difference that may be explained by a more solitary and more aggressive behavior in unowned adults, and/or possibly by a higher sensitivity related to a more stressful life. On the contrary, owned cats were more frequently infected with FPV (36.41% in owned cats vs 15.61% in unowned cats), possibly as a result of their concentration around human settlements. The present study showed that owned and unowned cats living in a same area have behavioral and physiological characteristics sufficiently different to influence virus circulation. Pooling different types of cats in a single sample without taking it into account could give a wrong picture of the epidemiology of their viruses. The conclusion of this work can be extended to any epidemiological studies led in wildlife species with flexible behavior as any variations in social or spatial structure, between or within populations, could result in different virus circulation. Copyright © 2011 Elsevier B.V. All rights reserved.

  14. The molecular detection of relaxin and its receptor RXFP1 in reproductive tissue of Felis catus and Lynx pardinus during pregnancy.

    Science.gov (United States)

    Braun, Beate C; Vargas, Astrid; Jewgenow, Katarina

    2012-03-01

    Relaxin acts as a pregnancy-specific signal in feline species, but specific information about protein structure and binding is essential for the improvement of pregnancy diagnosis in endangered feline species, like the Iberian lynx. To generate a felid-specific relaxin antibody, the DNA and protein sequences of lynx and cat were determined and peptides were chosen for antibody generation. In addition, relaxin and relaxin receptor (RXFP1) mRNA expressions were measured in uteri and ovaries of pregnant domestic cats and lynx placentae. Using real-time PCR and immunohistochemistry, it was established that feline placenta is the main source of relaxin during pregnancy. In other tested tissues, relaxin mRNA expression was weak. The RXFP1 mRNA expression was found mainly in cat uterine tissue and feline placentae. It was assumed that these tissues were main targets for relaxin. In the ovary, relaxin immunostaining was associated with blood vessels, signifying its role in vascularization.

  15. Endothelial and inducible nitric oxide synthase (NOS) immunoreactivity and NOS-associated NADPH-diaphorase histochemistry in the domestic cat (Felis catus) testis.

    Science.gov (United States)

    Liman, N; Alan, E; Beyaz, F; Gürbulak, K

    2013-12-01

    In this study, the cellular localization of nicotinamide adenine dinucleotide phosphate-diaphorase (NADPH-d) and the endothelial (eNOS) and inducible (iNOS) forms of nitric oxide (NO) synthase in the cat testis were studied using enzyme histochemical and immunohistochemical techniques. Stage-dependent nuclear and cytoplasmic eNOS/iNOS immunoreactivity and cytoplasmic NADPH-d reactivity were found in all germ cells, including spermatogonia, primary spermatocytes (preleptotene, zygotene, and pachytene spermatocytes), and round (Sa, Sb1) and elongating spermatids (Sb2, Sc) of the seminiferous epithelium. The pachytene spermatocytes exhibited strong positive reactions at all spermatogenic stage. Interestingly, in elongated spermatids (Sd1) at stages VI to VII, eNOS and iNOS immunostainings was observed only in the cytoplasm but not in the nuclei. eNOS and iNOS immunolabeling was observed in the acrosomal vesicle of some round spermatids (Sb1) at stages I, VII, and VIII, and in the acrosomal cap of elongating spermatids (Sb2) at stage II. Furthermore, eNOS, iNOS, and NADPH-d reactions in elongated spermatids (Sd2) just before spermiation at stage VIII were restricted only to the middle and principal pieces of the tail. Positive reactions were also observed in the Sertoli and Leydig cells as well as in other tissues including vascular endothelial and smooth muscle cells and peritubular myoid cells. These results suggest that NO may play an important role in chromatin condensation, spermatid shaping, and the final release of sperm from the spermatogenic epithelium. Furthermore, NO may also be involved in spermiogenesis, steroidogenesis, and apoptotic cell death. Copyright © 2013 Elsevier Inc. All rights reserved.

  16. Antibody detection and molecular characterization of toxoplasma gondii from bobcats (Lynx rufus), domestic cats (Felis catus), and wildlife from Minnesota, USA

    Science.gov (United States)

    Little is known of the epidemiology of toxoplasmosis in Minnesota. In this study, we evaluated Toxoplasma gondii infection in 50 wild bobcats (Lynx rufus) and 75 other animals on/near 10 cattle farms. Antibodies to T. gondii were assayed in serum samples or tissue fluids by the modified agglutinatio...

  17. AVALIAÇÃO DE SEGURANÇA E ANALGESIA DE PROTOCOLOS ANESTÉSICOS PARA ELETROEJACULAÇÃO EM GATOS DOMÉSTICOS (Felis catus

    Directory of Open Access Journals (Sweden)

    TICIANA FRANCO PEREIRA DA SILVA

    2011-09-01

    Full Text Available The objective of this study was to evaluate the security and analgesia of anesthetics protocols usually used for electroejaculation (EEJ in domestic cats. Fourteen toms were anesthetized with 4 protocols and submitted to a 3 series of electric stimuli (2-6 mA. The heart rate, respiratory rate, temperature, pain sensibility and eyes blink were analyzed prior and after induction, and during and after electroejaculation. The anesthesia protocol thatused isoflurane was the best for analgesic parameters, security and speed of recuperation for electroejaculation in domestic cats

  18. Avaliação da pressão arterial em gatas (Felis catus submetidas a pneumoperitônio com dióxido de carbono

    Directory of Open Access Journals (Sweden)

    JEO Alves

    2016-12-01

    Full Text Available Pneumoperitônio é a técnica de insuflação com gás da cavidade peritoneal necessária para que haja uma boa visualização das estruturas anatômicas na cirurgia videolaparoscópica. Todavia, diversas alterações fisiológicas são relatadas em decorrência do pneumoperitônio, quais sejam por deslocamento e compressão de estruturas como o diafragma, alterando a fisiologia respiratória, e a veia cava caudal, comprometendo o pré-carga e o débito cardíaco, ou por efeitos sistêmicos decorrentes da absorção de CO2, por exemplo. O presente estudo teve como objetivo avaliar as alterações hemodinâmicas do pneumoperitônio com CO2 em gatas anestesiadas. Foram utilizadas 10 gatas sadias, adultas, premedicadas com cloridrato de cetamina e midazolam e anestesiadas com isoflurano e submetidas a OSH por cirurgia laparoscópica com insuflação abdominal por CO2. As pressões diastólica, sistólica e média foram avaliadas de maneira invasiva por cateterização da artéria femoral e mensurada por um monitor multiparamétrico antes e depois do estabelecimento do pneumoperitônio. Os resultados foram formatados e submetidos à análise de variância e posteriormente analisados pelo teste t de Student e teste Tukey. As alterações em PAS, PAD e PAM observadas no decorrer dos procedimentos, entretanto, não configuraram diferenças estatísticas conforme as análises realizadas. Conclui-se, então, que a realização do pneumoperitônio com CO2 não provoque alterações relevantes na pressão arterial em gatas anestesiadas ou que estas alterações sejam fisiologicamente corrigidas por mecanismos compensatórios.

  19. Distribución de marcadores fenotípicos en poblaciones de gato doméstico (Felis catus, Felidae en el Departamento del Meta, Colombia

    Directory of Open Access Journals (Sweden)

    Campos Mosos Héctor Aníbal

    2006-06-01

    Full Text Available Se realizaron muestreos en ocho municipios del departamento del Meta, en los que se identificaron diez loci que codifican para características del pelaje y una malformación esquelética en la cola del gato doméstico. El objetivo de este muestreo fue analizar la estructura genética existente entre estas poblaciones y su posible relación con poblaciones de gatos previamente muestreadas en otras zonas de Colombia. Se encontró que todas las poblaciones están en estado de equilibrio Hardy-Weinberg para los loci O y S. A partir de estadísticos de diversidad génica, flujo génico y análisis multivariantes, se encontró que las poblaciones estudiadas
    en el Meta, aunque no presentan un proceso de estructuración marcado, no llegan a constituirse en un único pool genético establecido dentro de Colombia, ya que presentan relación con otras poblaciones colombianas de presunto origen español, tanto con influencia atlántica como con influencia pacífica.

  20. Vascularização arterial dos cornos uterinos em gatas gestantes sem raça definida (Felis catus Linnaeus, 1758

    Directory of Open Access Journals (Sweden)

    Rosana Marques Silva

    2004-02-01

    Full Text Available Utilizaram-se 24 gatas gestantes, sem raça definida, doadas para o estudo da vascularização arterial dos cornos uterinos. Em 20 animais, com o intervalo gestacional entre 7 e 9 semanas, a aorta abdominal foi injetada com Látex-Neoprene 650 corado, associado ao Sulfato de Bário 1004. Os animais foram então radiografados, fixados em solução aquosa de formol 10% e dissecados para estudo da distribuição dos vasos arteriais destinados às regiões paraplacentárias e de cintas placentárias. Em 4 animais realizou-se o exame por Ecografia Power Doppler, onde se observou que nas regiões das cintas placentárias o índice de resistência dos vasos apresenta-se menor do que o encontrado ao longo da artéria uterina. Em todas as observações, a artéria uterina é o principal vaso a irrigar os cornos uterinos, emitindo de 2 a 17 ramos, com maior freqüência de 5 a 12 ramos, os quais se distribuem nas regiões paraplacentárias e/ou das cintas placentárias, formando arcadas anastomósticas. Não houve diferenças estatísticas significativas do número de ramos para cada região individualmente, porém a análise das radiografias contrastadas demonstrou haver uma concentração maior de contraste nas regiões das cintas placentárias. A artéria ovárica participa da vascularização arterial da extremidade cranial dos cornos uterinos, onde se anastomosa com ramos da artéria uterina.

  1. Participação dos nervos intercostais na inervação do diafragma de gatos (Felis catus, Linnaeus, 1758

    Directory of Open Access Journals (Sweden)

    Marcelo Domingues de Faria

    2011-08-01

    Full Text Available The knowledge of organism's anatomy is essential to conduct any experiment or study with itself. Based on that, we decided to analyze and study in details the innervation of the diaphragm muscle from intercostal nerves in cats. It goes beyond other authors' analysis that describes only the innervation from phrenic nerves. Despite we have got a range of results, we observed a major frequency of eighth to tenth intercostal nerves going to diaphragm muscle.

  2. Linking genetic diversity and temporal fluctuations in population abundance of the introduced feral cat (Felis silvestris catus) on the Kerguelen archipelago.

    Science.gov (United States)

    Devillard, S; Santin-Janin, H; Say, L; Pontier, D

    2011-12-01

    Linking temporal variations of genetic diversity, including allelic richness and heterozygosity, and spatio-temporal fluctuations in population abundance has emerged as an important tool for understanding demographic and evolutionary processes in natural populations. This so-called genetic monitoring was conducted across 12 consecutive years (1996-2007) at three sites for the feral cat, introduced onto the Kerguelen archipelago fifty years ago. Temporal changes in allelic richness and heterozygosity at 18 microsatellite DNA loci were compared with temporal changes in the adult population abundance index, obtained by typical demographic monitoring. No association was found at the island spatial scale, but we observed an association between genetic diversity and adult population indices from year to year within each study site. More particularly, the magnitude of successive increases or decreases in the adult population abundance index appeared to be the major factor linking the trajectories of genetic diversity and adult population abundance indices. Natal dispersal and/or local recruitment, both facilitated by high juvenile survival when the adult population size is small, is proposed as the major demographic processes contributing to such an observed pattern. Finally, we suggested avoiding the use of the harmonic mean as an estimator of long-term population size to study the relationships between demographic fluctuations and heterozygosity in populations characterized by strong multiannual density fluctuations. © 2011 Blackwell Publishing Ltd.

  3. Personality structure in the domestic cat (Felis silvestris catus), Scottish wildcat (Felis silvestris grampia), clouded leopard (Neofelis nebulosa), snow leopard (Panthera uncia), and African lion (Panthera leo): a comparative study.

    Science.gov (United States)

    Gartner, Marieke Cassia; Powell, David M; Weiss, Alexander

    2014-11-01

    Although the study of nonhuman personality has increased in the last decade, there are still few studies on felid species, and the majority focus on domestic cats. We assessed the structure of personality and its reliability in five felids-domestic cats, clouded leopards, snow leopards, African lions, and previous data on Scottish wildcats-and compared the results. In addition to the benefits of understanding more about this taxon, comparative studies of personality structure have the potential to provide information on evolutionary relationships among closely related species. Each of the species studied was found to have three factors of personality. Scottish wildcats' factors were labeled Dominance, Agreeableness, and Self Control; domestic cats' factors were Dominance, Impulsiveness, and Neuroticism; clouded leopards' factors were Dominance/Impulsiveness, Agreeableness/Openness, and Neuroticism; snow leopards' factors were Dominance, Impulsiveness/Openness, and Neuroticism; and African lions' factors were Dominance, Impulsiveness, and Neuroticism. The Neuroticism and Impulsiveness factors were similar, as were two of the Dominance factors. A taxon-level personality structure also showed three similar factors. Age and sex effects are also discussed. (PsycINFO Database Record (c) 2014 APA, all rights reserved).

  4. Molecular evidence of Rickettsia felis infection in dogs from northern territory, Australia

    Directory of Open Access Journals (Sweden)

    Rees Robert L

    2011-10-01

    Full Text Available Abstract The prevalence of spotted fever group rickettsial infection in dogs from a remote indigenous community in the Northern Territory (NT was determined using molecular tools. Blood samples collected from 130 dogs in the community of Maningrida were subjected to a spotted fever group (SFG-specific PCR targeting the ompB gene followed by a Rickettsia felis-specific PCR targeting the gltA gene of R. felis. Rickettsia felis ompB and gltA genes were amplified from the blood of 3 dogs. This study is the first report of R. felis infection in indigenous community dogs in NT.

  5. Outbreaks of Rickettsia felis in Kenya and Senegal, 2010

    Centers for Disease Control (CDC) Podcasts

    2010-06-09

    This podcast describes the outbreak of Rickettsia felis in Kenya between August 2006 and June 2008, and in rural Senegal from November 2008 through July 2009. CDC infectious disease pathologist Dr. Chris Paddock discusses what researchers learned about this flea-borne disease and how to prevent infection.  Created: 6/9/2010 by National Center for Emerging and Zoonotic Infectious Diseases (NCEZID).   Date Released: 6/24/2010.

  6. Efficacy of fluralaner flavored chews (Bravecto) administered to dogs against the adult cat flea, Ctenocephalides felis felis and egg production.

    Science.gov (United States)

    Dryden, Michael W; Smith, Vicki; Bennett, Tashina; Math, Lisa; Kallman, James; Heaney, Kathleen; Sun, Fangshi

    2015-07-11

    Fluralaner is a potent insecticide and acaricide with rapid and persistent efficacy. This study measured the efficacy of fluralaner flavored chews (Bravecto®, Merck Animal Health) administered to dogs against adult Ctenocephalides felis felis and egg production. Twelve purpose-bred dogs were randomly allocated to two groups of six dogs each. Dogs in treatment group 1 were administered a single fluralaner flavored chew to achieve a minimum dose of at least 25 mg/kg while treatment group 2 served as untreated controls. On Days -2, 28, 56, 84, 91, 98, 105, 112, and 120 post-treatment, each dog was infested with approximately 200 unfed cat fleas, C. felis felis (KS1 strain). Forty-eight hours after treatment and 48 h after each infestation, eggs were collected over a 3-h period, counted and viability determined. Dogs were combed to remove any remaining fleas. Treatment of dogs with oral fluralaner provided a 100% reduction in flea counts 48 h after treatment and within 48 h of every post-treatment infestation through Day122. Egg production from fluralaner treated dogs was reduced by 99.9% (two eggs from one dog) within 48 h after treatment and not a single egg (100% efficacy) was thereafter collected from treated dogs. Adult flea counts and egg production from the fluralaner-treated dogs were significantly lower than for non-treated controls at all post-treatment evaluations (P fluralaner flavored chews provided 100% efficacy against repeated flea infestations on dogs for 4 months. Fluralaner reduced egg production of activity reproducing female fleas by 99.9% and then killed every single female flea before any eggs could be produced following each subsequent re-infestation for the entire 122-day evaluation period.

  7. Life cycle of Cystoisospora felis (Coccidia: Apicomplexa) in cats and mice

    Science.gov (United States)

    Cystoisospora felis is a ubiquitous apicomplexan protozoon of cats. The endogenous development of C. felis was studied in cats after feeding them infected mice. For this, 5 newborn cats were killed at 24, 48, 72, 96, and 120 h after having been fed mesenteric lymph nodes and spleens of mice that wer...

  8. Rickettsia typhi and R. felis in rat fleas (Xenopsylla cheopis), Oahu, Hawaii.

    Science.gov (United States)

    Eremeeva, Marina E; Warashina, Wesley R; Sturgeon, Michele M; Buchholz, Arlene E; Olmsted, Gregory K; Park, Sarah Y; Effler, Paul V; Karpathy, Sandor E

    2008-10-01

    Rickettsia typhi (prevalence 1.9%) and R. felis (prevalence 24.8%) DNA were detected in rat fleas (Xenopsylla cheopis) collected from mice on Oahu Island, Hawaii. The low prevalence of R. typhi on Oahu suggests that R. felis may be a more common cause of rickettsiosis than R. typhi in Hawaii.

  9. Rickettsia typhi and R. felis in Rat Fleas (Xenopsylla cheopis), Oahu, Hawaii

    OpenAIRE

    Eremeeva, Marina E.; Warashina, Wesley R.; Sturgeon, Michele M.; Buchholz, Arlene E.; Olmsted, Gregory K.; Park, Sarah Y.; Effler, Paul V.; Karpathy, Sandor E.

    2008-01-01

    Rickettsia typhi (prevalence 1.9%) and R. felis (prevalence 24.8%) DNA were detected in rat fleas (Xenopsylla cheopis) collected from mice on Oahu Island, Hawaii. The low prevalence of R. typhi on Oahu suggests that R. felis may be a more common cause of rickettsiosis than R. typhi in Hawaii.

  10. Cat fleas (Ctenocephalides felis) from cats and dogs in New Zealand: Molecular characterisation, presence of Rickettsia felis and Bartonella clarridgeiae and comparison with Australia.

    Science.gov (United States)

    Chandra, Shona; Forsyth, Maureen; Lawrence, Andrea L; Emery, David; Šlapeta, Jan

    2017-01-30

    The cat flea (Ctenocephalides felis) is the most common flea species parasitising both domestic cats and dogs globally. Fleas are known vectors of zoonotic pathogens such as vector borne Rickettsia and Bartonella. This study compared cat fleas from domestic cats and dogs in New Zealand's North and South Islands to Australian cat fleas, using the mitochondrial DNA (mtDNA) marker, cytochrome c oxidase subunit I and II (cox1, cox2). We assessed the prevalence of Rickettsia and Bartonella using genus specific multiplexed real-time PCR assays. Morphological identification confirmed that the cat flea (C. felis) is the most common flea in New Zealand. The examined fleas (n=43) at cox1 locus revealed six closely related C. felis haplotypes (inter-haplotype distance 1.1%) across New Zealand. The New Zealand C. felis haplotypes were identical or near identical with haplotypes from southern Australia demonstrating common dispersal of haplotype lineage across both the geographical (Tasman Sea) and climate scale. New Zealand cat fleas carried Rickettsia felis (5.3%) and Bartonella clarridgeiae (18.4%). To understand the capability of C. felis to vector zoonotic pathogens, we determined flea cox1 and cox2 haplotype diversity with the tandem multiplexed real-time PCR and sequencing for Bartonella and Rickettsia. This enabled us to demonstrate highly similar cat fleas on cat and dog populations across Australia and New Zealand. Copyright © 2016 Elsevier B.V. All rights reserved.

  11. Medical and molecular biological application in the FELI

    Energy Technology Data Exchange (ETDEWEB)

    Nishimura, E.; Ogino, S.; Suzuki, T. [Free Electron Laser Research Institute, Inc., Osaka (Japan)] [and others

    1995-12-31

    Some of the user`s rooms of the FELI have been equipped for medical and molecular biological research. Main subjects are immunological reaction and cell fusion induced by IR FEL. We are beginning to do the preliminary irradiation experiments. The cultured T lymphocytes (Molt-4, human) are irradiated to FEL at wavelength 6.3{mu}m with the power density approximate 500mW/mm{sup 2} for 10 minutes, in the culture media (RPMI-1640) including 10% fetal bovine serum. Swelling and consequent collapse of the cells can be observed, probably due to abrasion of the cell membranes.

  12. Ctenocephalides felis felis vs. Ctenocephalides canis (Siphonaptera: Pulicidae: some issues in correctly identify these species Ctenocephalides felis felis vs. Ctenocephalides canis: (Siphonaptera: Pulicidae: algumas questões para identificar corretamente estas espécies

    Directory of Open Access Journals (Sweden)

    Pedro Marcos Linardi

    2012-12-01

    Full Text Available Ctenocephalides felis felis is one of the most important ectoparasites of dogs and cats throughout the world, because of its geographical distribution, dual parasitological action as an infesting agent and a vector of diseases, the economic losses and the acquired resistance against common insecticides. In Brazil, it surpasses Ctenocephalides canis in distribution, number of host species infested, prevalence and epidemiological importance. However, in some studies the species have been misidentified on the basis of their morphological characters included in taxonomic keys. The morphological variations of chaetotaxy, especially those on the dorsal margin of the hind tibia and lateral metanotal area (LMA, found in certain specimens, have sometimes been erroneously treated as hybrids, in spite of the nonexistence of the two species of Ctenocephalides in the same municipality or region. This review focuses on the characteristics used for interspecific diagnosis and intraspecific variations found between the species. Data on distribution, hosts, prevalence and parasitological action are also presented as an auxiliary means for recognizing the species.Ctenocephalides felis felis é um dos mais importantes ectoparasitos de cães e gatos no mundo inteiro, em virtude de sua distribuição geográfica, dupla ação parasitológica como agente infestante e vetor de doenças, perdas econômicas e resistência adquirida contra inseticidas comuns. No Brasil, ela sobrepuja Ctenocephalides canis em distribuição, número de espécies de hospedeiros infestadas, prevalência e importância epidemiológica. Todavia, em alguns estudos, as espécies têm sido incorretamente identificadas pelos caracteres morfológicos incluídos em chaves taxonômicas. As variações morfológicas de quetotaxia, especialmente aquelas da margem dorsal da tibia posterior e área metanotal lateral (LMA encontradas em certos exemplares, algumas vezes têm sido erroneamente consideradas

  13. Spotlight census of the red fox (Vulpes vulpes) and the domestic cat (Felis catus) in three sample areas of the Marches region (Central Italy) / Censimento notturno di Volpe (Vulpes vulpes) e di Gatto domestico (Felis catus) in tre aree campione delle Marche

    OpenAIRE

    Massimo Pandolfi; Riccardo Santolini; Marco Bonacoscia

    1991-01-01

    Abstract In order to evaluate the density of the red fox and of the domestic cat, 55 transects were made from 1986 to 1989 using spotlight census method in three sample areas. The mean density of foxes agreed substantially with its biological cycle and the hightes values (2.01 foxes/km² in spring and 4.3 foxes/km² in winter) were recorded in the study area with the better natural characteristics. Foxes selected the shrub woodland (macchia) all y...

  14. Occurrence of Leishmania (Leishmania chagasi in a domestic cat (Felis catus in Andradina, São Paulo, Brazil: case report Ocorrência de Leishmania (Leishmania chagasi em gato doméstico (Felis catus em Andradina, São Paulo, Brasil: relato de caso

    Directory of Open Access Journals (Sweden)

    Willian Marinho Dourado Coelho

    2010-12-01

    Full Text Available This work describes natural infection by Leishmania in a domestic cat where amastigote forms of the parasite were observed in the popliteal lymph node imprint. Positive and negative serological reactions were observed by enzyme-linked immunosorbent assay (ELISA and indirect immunofluorescence assay (IFA, respectively. Polymerase chain reaction (PCR revealed that the nucleotide sequence of the sample was identical to Leishmania (L. chagasi. This is the first report of the disease in felines of the city of Andradina, SP, an area considered endemic for canine and human visceral leishmaniasis.Neste trabalho, é relatada a infecção natural por Leishmania em um gato doméstico no qual, formas amastigotas do parasito foram observadas em imprint de linfonodo poplíteo. Reações sorológicas positivas e negativas foram observadas pelo teste de imunoadsorção enzimática (ELISA e reação de imunofluorescência indireta (RIFI, respectivamente. A reação em cadeia da polimerase (PCR revelou que a sequência de nucleotídeos foi idêntica à Leishmania (L. chagasi. Este é o primeiro relato da doença em felino da cidade de Andradina, Estado de São Paulo, Brasil, área considerada endêmica para leishmaniose visceral canina e humana.

  15. COMPARISON BETWEEN TWO METHODS OF STAINING FOR ASSESSMENT OF MORPHOLOGY AND ACROSOME IN DOMESTIC CAT (Felis catus SPERMATOZOA COMPARAÇÃO ENTRE DOIS MÉTODOS DE COLORAÇÃO PARA ANÁLISE MORFOLÓGICA E ACROSSOMAL DE ESPERMATOZÓIDES DE GATO DOMÉSTICO (Felis catus.

    Directory of Open Access Journals (Sweden)

    Frederico Ozanam Papa

    2008-10-01

    Full Text Available

    The objective of this study was to evaluate the efficiency of the modified Karras staining technique (KA to analyze domestic cat sperm morphology by comparing it with the Fast Green FCF/ Rose Bengal staining (FR, previously used for this species. Four adult cats were used, from which sperm samples were collected four times in alternate days for each tom using an artificial vagina (n=16 ejaculates. Both staining techniques were performed for each ejaculate. For the FR staining technique, the semen in natura was diluted in 2.9% sodium citrate and, afterwards, in the staining solution. After 70 seconds, smears were made onto slide and dried at 37ºC. For the KA staining technique, previously made and formol saline fixed slides were sequentially immersed in Rose Bengal solution, Tannin solution, and Victoria Blue B solution, and dried at room temperature. For sperm evaluation, 200 sperm cells were assessed for each staining technique in all ejaculate samples using a bright field microscope at 1000X magnification. Statistical analysis used the non-parametric Wilcoxon test, establishing significance at p<0.05. For the KA staining technique, higher percentage of distal cytoplasmic droplets and lower percentage of sperm head defects were obtained when compared to the FR staining technique. This way, both staining techniques were not totally efficient for the assessment of morphological defects found in the domestic cat in natura spermatozoa.

    KEY WORDS: Acrosome, domestic cat, spermatozoa, sperm morphology, staining.

     

    O objetivo do estudo foi avaliar a eficiência do método de coloração Karras modificado (KA para a análise da morfologia espermática no gato doméstico através da comparação com a coloração Fast Green FCF/Rosa Bengala (FR, previamente utilizada para esta espécie. Utilizaram-se quatro gatos adultos, colhendo-se quatro vezes amostras de sêmen em dias alternados para cada animal através de vagina artificial (n=16 ejaculados. Para cada ejaculado, realizaram-se duas colorações. Para a coloração FR, o sêmen in natura foi diluído em citrato de sódio 2,9% e, posteriormente, em solução de coloração. Após setenta segundos, procedeu-se a esfregaços em lâminas, as quais foram secas a 37ºC. Para a coloração KA, os esfregaços previamente confeccionados e fixados em formol salino foram imersos seqüencialmente nas soluções de Rosa Bengala, Tanino e Azul Vitória e secas em temperatura ambiente. Avaliaram-se duzentas células para cada tipo de coloração em todos os ejaculados, usando-se microscópio de luz em aumento de 1.000X. Efetuou-se análise estatística mediante o teste não-paramétrico de Wilcoxon, estabelecendo diferença significativa quando p<0,05. Para a coloração de KA, obtiveram-se maior porcentagem de gota citoplasmática distal e menor porcentagem de defeitos de cabeça quando comparada à coloração FR. Assim, nenhuma das colorações mostrou-se totalmente eficiente na identificação dos defeitos de morfologia encontrados na avaliação do sêmen in natura de gatos domésticos.

    PALAVRAS-CHAVES: Acrossomo, coloração, espermatozóide, gato doméstico, morfologia espermática.

     

  16. Effect of cavity length detuning on the output characteristics for the middle infrared FEL oscillator of FELiChEM

    Science.gov (United States)

    Zhao, Zhou-Yu; Li, He-Ting; Jia, Qi-Ka

    2017-10-01

    FELiChEM is an infrared free electron laser (FEL) facility currently under construction, which consists of two oscillators generating middle-infrared and far-infrared laser covering the spectral range of 2.5–200 μm. In this paper, we numerically study the output characteristics of the middle-infrared oscillator with accurate cavity length detuning. Emphasis is put on the temporal structure of the micropulse and the corresponding spectral bandwidth. Taking the radiation wavelengths of 50 μm and 5 μm as examples, we show that the output pulse duration can be tuned in the range of 1–6 ps with corresponding bandwidth of 13%–0.2% by adjusting the cavity length detuning. In addition, a special discussion on the comb structure is presented, and it is indicated that the comb structure may arise in the output optical pulse when the normalized slippage length is much smaller than unity. This work has reference value for the operation of FELiChEM and other FEL oscillators. Supported by National Natural Science Foundation of China (21327901, 11205156)

  17. Comparative whole genome sequence analysis of the carcinogenic bacterial model pathogen Helicobacter felis.

    Science.gov (United States)

    Arnold, Isabelle C; Zigova, Zuzana; Holden, Matthew; Lawley, Trevor D; Rad, Roland; Dougan, Gordon; Falkow, Stanley; Bentley, Stephen D; Müller, Anne

    2011-01-01

    The gram-negative bacterium Helicobacter felis naturally colonizes the gastric mucosa of dogs and cats. Due to its ability to persistently infect laboratory mice, H. felis has been used extensively to experimentally model gastric disorders induced in humans by H. pylori. We determined the 1.67 Mb genome sequence of H. felis using combined Solexa and 454 pyrosequencing, annotated the genome, and compared it with multiple previously published Helicobacter genomes. About 1,063 (63.6%) of the 1,671 genes identified in the H. felis genome have orthologues in H. pylori, its closest relative among the fully sequenced Helicobacter species. Many H. pylori virulence factors are shared by H. felis: these include the gamma-glutamyl transpeptidase GGT, the immunomodulator NapA, and the secreted enzymes collagenase and HtrA. Helicobacter felis lacks a Cag pathogenicity island and the vacuolating cytotoxin VacA but possesses a complete comB system conferring natural competence. Remarkable features of the H. felis genome include its paucity of transcriptional regulators and an extraordinary abundance of chemotaxis sensors and restriction/modification systems. Helicobacter felis possesses an episomally replicating 6.7-kb plasmid and harbors three chromosomal regions with deviating GC content. These putative horizontally acquired regions show homology and synteny with the recently isolated H. pylori plasmid pHPPC4 and homology to Campylobacter bacteriophage genes (transposases, structural, and lytic genes), respectively. In summary, the H. felis genome harbors a variety of putative mobile elements that are unique among Helicobacter species and may contribute to this pathogen's carcinogenic properties.

  18. Detection of Rickettsia felis in Wild Mammals from Three Municipalities in Yucatan, Mexico.

    Science.gov (United States)

    Panti-May, Jesús Alonso; Torres-Castro, Marco; Hernández-Betancourt, Silvia; Dzul-Rosado, Karla; Zavala-Castro, Jorge; López-Avila, Karina; Tello-Martín, Raúl

    2015-09-01

    The aim of this study was to provide information of the occurrence of Rickettsia felis in wild mammals from three municipalities in Yucatan, Mexico. The reactivity of rodent serum to Rickettsia antigens was detected in 80.9% (17 of 21) samples using immunofluorescence assay. Polymerase chain reaction identified rickettsial DNA in spleens of 43.5% (10 of 23) rodents and 57.1% (4 of 7) opossums. The identification of the rickettsial DNA was confirmed as R. felis by restriction fragment length polymorphism and DNA sequencing. This study comprises the first report of R. felis detection in wild mammals in Yucatan.

  19. In vitro fertilization and sperm cryopreservation in the black-footed cat (Felis nigripes) and sand cat (Felis margarita).

    Science.gov (United States)

    Herrick, J R; Campbell, M; Levens, G; Moore, T; Benson, K; D'Agostino, J; West, G; Okeson, D M; Coke, R; Portacio, S C; Leiske, K; Kreider, C; Polumbo, P J; Swanson, W F

    2010-03-01

    Studies of in vitro fertilization (IVF) and sperm cryopreservation have been conducted in several small cat species, but virtually no data exist for black-footed cats (Felis nigripes) (BFCs) or sand cats (Felis margarita) (SCs). The objectives of this study were 1) to compare in vitro motility and acrosome status of fresh and cryopreserved (frozen in pellets on dry ice or in straws in liquid nitrogen vapor) BFC and SC spermatozoa cultured in feline-optimized culture medium (FOCM) or Ham F-10, 2) to assess ovarian responsiveness in BFCs and SCs following exogenous gonadotropin treatment and laparoscopic oocyte recovery, and 3) to evaluate the fertility of fresh and frozen-thawed spermatozoa from both species using homologous and heterologous (domestic cat oocytes) IVF in the two culture media. Motility and acrosomal integrity of fresh and frozen-thawed spermatozoa from BFCs and SCs were similar (P > 0.05) in both media during 6 h of culture. Although effects were more pronounced in SCs, cryopreservation in straws was superior (P 80% of recovered oocytes were of optimal (grade 1) quality. The BFC and SC spermatozoa fertilized 60.0%-79.4% of homologous and 37.7%-42.7% of heterologous oocytes in both culture media, with increased (P < 0.05) cleavage of homologous (SC) and heterologous (BFC and SC) oocytes in FOCM. These results provide the first information to date on the gamete biology of two imperiled cat species and further our capacity to apply reproductive technologies for their conservation.

  20. INFECTION BY Rickettsia felis IN OPOSSUMS (Didelphis sp.) FROM YUCATAN, MEXICO.

    Science.gov (United States)

    Peniche-Lara, Gaspar; Ruiz-Piña, Hugo A; Reyes-Novelo, Enrique; Dzul-Rosado, Karla; Zavala-Castro, Jorge

    2016-01-01

    Rickettsia felis is an emergent pathogen and the causative agent of a typhus-like rickettsiosis in the Americas. Its transmission cycle involves fleas as biological vectors (mainly Ctenocephalides felis) and multiple domestic and synanthropic mammal hosts. Nonetheless, the role of mammals in the cycle of R. felis is not well understood and many efforts are ongoing in different countries of America to clarify it. The present study describes for the first time in Mexico the infection of two species of opossum (Didelphis virginiana and D. marsupialis) by R. felis. A diagnosis was carried out from blood samples by molecular methods through the gltA and 17 kDa genes and sequence determination. Eighty-seven opossum samples were analyzed and 28 were found to be infected (32.1%) from five out of the six studied localities of Yucatan. These findings enable recognition of the potential epidemiological implications for public health of the presence of infected synanthropic Didelphis in households.

  1. Embryonic thymic development in fetuses of domestic cats (Felis domesticus

    Directory of Open Access Journals (Sweden)

    Fernanda Rodrigues Agreste

    2012-09-01

    Full Text Available During fetal life, and during the neonatal period, the thymus is a very important immune organ, and is the largest lymphatic organ, which exhibits high lymphopoietic activity as a precursor of lymphopoiesis. Morphological studies on the development of the thymus are rare and only include general information. Given the above, this study aimed to characterize the morphological development of the thymus of embryos and fetuses of domestic cats (Felis domesticus, from natural pregnancy, using macroscopic dissection techniques and light microscopy. The thymus of the cats was pale pink and was resting in the region of the cranial mediastinum, medially to the lungs and dorsally to the base of the heart. Histologically, two distinct regions were observed (cortical and medullar. The medullary region had reticular epithelial cells with large nuclei and dendritic extensions. The fetuses had exponential growth and were more pronounced starting on the 35th day of gestation.

  2. Molecular Detection of Rickettsia felis in Different Flea Species from Caldas, Colombia

    Science.gov (United States)

    Ramírez-Hernández, Alejandro; Montoya, Viviana; Martínez, Alejandra; Pérez, Jorge E.; Mercado, Marcela; de la Ossa, Alberto; Vélez, Carolina; Estrada, Gloria; Correa, Maria I.; Duque, Laura; Ariza, Juan S.; Henao, Cesar; Valbuena, Gustavo; Hidalgo, Marylin

    2013-01-01

    Rickettsioses caused by Rickettsia felis are an emergent global threat. Historically, the northern region of the province of Caldas in Colombia has reported murine typhus cases, and recently, serological studies confirmed high seroprevalence for both R. felis and R. typhi. In the present study, fleas from seven municipalities were collected from dogs, cats, and mice. DNA was extracted and amplified by polymerase chain reaction (PCR) to identify gltA, ompB, and 17kD genes. Positive samples were sequenced to identify the species of Rickettsia. Of 1,341 fleas, Ctenocephalides felis was the most prevalent (76.7%). Positive PCR results in the three genes were evidenced in C. felis (minimum infection rates; 5.3%), C. canis (9.2%), and Pulex irritans (10.0%). Basic Local Alignment Search Tool (BLAST) analyses of sequences showed high identity values (> 98%) with R. felis, and all were highly related by phylogenetic analyses. This work shows the first detection of R. felis in fleas collected from animals in Colombia. PMID:23878183

  3. Plasmids and rickettsial evolution: insight from Rickettsia felis.

    Directory of Open Access Journals (Sweden)

    Joseph J Gillespie

    2007-03-01

    Full Text Available The genome sequence of Rickettsia felis revealed a number of rickettsial genetic anomalies that likely contribute not only to a large genome size relative to other rickettsiae, but also to phenotypic oddities that have confounded the categorization of R. felis as either typhus group (TG or spotted fever group (SFG rickettsiae. Most intriguing was the first report from rickettsiae of a conjugative plasmid (pRF that contains 68 putative open reading frames, several of which are predicted to encode proteins with high similarity to conjugative machinery in other plasmid-containing bacteria.Using phylogeny estimation, we determined the mode of inheritance of pRF genes relative to conserved rickettsial chromosomal genes. Phylogenies of chromosomal genes were in agreement with other published rickettsial trees. However, phylogenies including pRF genes yielded different topologies and suggest a close relationship between pRF and ancestral group (AG rickettsiae, including the recently completed genome of R. bellii str. RML369-C. This relatedness is further supported by the distribution of pRF genes across other rickettsiae, as 10 pRF genes (or inactive derivatives also occur in AG (but not SFG rickettsiae, with five of these genes characteristic of typical plasmids. Detailed characterization of pRF genes resulted in two novel findings: the identification of oriV and replication termination regions, and the likelihood that a second proposed plasmid, pRFdelta, is an artifact of the original genome assembly.Altogether, we propose a new rickettsial classification scheme with the addition of a fourth lineage, transitional group (TRG rickettsiae, that is unique from TG and SFG rickettsiae and harbors genes from possible exchanges with AG rickettsiae via conjugation. We offer insight into the evolution of a plastic plasmid system in rickettsiae, including the role plasmids may have played in the acquirement of virulence traits in pathogenic strains, and the

  4. The genome sequence of Rickettsia felis identifies the first putative conjugative plasmid in an obligate intracellular parasite.

    OpenAIRE

    Hiroyuki Ogata; Patricia Renesto; Stéphane Audic; Catherine Robert; Guillaume Blanc; Pierre-Edouard Fournier; Hugues Parinello; Jean-Michel Claverie; Didier Raoult

    2005-01-01

    We sequenced the genome of Rickettsia felis, a flea-associated obligate intracellular alpha-proteobacterium causing spotted fever in humans. Besides a circular chromosome of 1,485,148 bp, R. felis exhibits the first putative conjugative plasmid identified among obligate intracellular bacteria. This plasmid is found in a short (39,263 bp) and a long (62,829 bp) form. R. felis contrasts with previously sequenced Rickettsia in terms of many other features, including a number of transposases, sev...

  5. Evaluation of Cytauxzoon felis infection status in captive-born wild felids housed in an area endemic for the pathogen.

    Science.gov (United States)

    Lewis, Kristin M; Cohn, Leah A; Downey, Megan E; Whitney, Marlyn S; Birkenheuer, Adam J

    2012-10-15

    To determine whether apparently healthy captive-born wild felids that were not native to North America and were housed in an area endemic for Cytauxzoon felis harbored the pathogen. Prospective observational case series. 11 captive-born wild felids that were (1 bobcat [Lynx rufus] and 1 cougar [Puma concolor]) or were not (1 lion [Panthera leo] and 8 tigers [Panthera tigris]) native to North America and 6 domestic cats (5 pets and 1 feral). Blood was collected, and a PCR assay for C felis was performed. The C felis 18S rRNA gene sequence was characterized in samples that tested positive. Blood smears were evaluated microscopically for intraerythrocytic organisms consistent with C felis. Blood smears from an additional 6 feral domestic cats found dead on the study premises were also evaluated. 4 tigers and 6 domestic cats without clinical signs of disease tested positive for C felis infection via PCR assay; intraerythrocytic organisms consistent with C felis were identified in smears from 1 C felis-infected tiger (which also had azotemia) and in smears from 11 of 12 domestic cats. Possible erythrocytic inclusions were identified in 1 tiger that tested negative for C felis. Sequences of C felis 18S rRNA amplicons from all infected tigers shared > 99.8% identity with reported C felis sequences from North American domestic cats and were identical to amplicons from domestic cats on the premises. Captive tigers without clinical signs of disease tested positive for C felis. The PCR assay for C felis appeared to be more reliable than cytologic detection of piroplasms in tigers.

  6. Anti-inflammatory and Anti-tumorigenic Effects of Açai Berry in Helicobacter felis-infected mice.

    Science.gov (United States)

    Lee, Ju Yup; Kim, Nayoung; Choi, Yoon Jeong; Nam, Ryoung Hee; Lee, Seonmin; Ham, Min Hee; Suh, Ji Hyung; Choi, Yoon Jin; Lee, Hye Seung; Lee, Dong Ho

    2016-03-01

    The aim of this study was to evaluate the anti-inflammatory and anti-tumorigenic effect of açai berry after chronic Helicobacter felis colonization in the stomachs of C57BL/6 mice. A total of 57 four-week-old female C57BL/6 mice (18 control mice and 39 experimental mice) were used. The mice were administered orogastrically with vehicle only or vehicle containing H. felis, 5 times every other day. After inoculation of H. felis, mice were fed either a standard or an açai-containing diet and then sacrificed at 4, 24, and 52 weeks. The infection status and degree of inflammation were determined by culture and histopathology. The level of gastric mucosal myeloperoxidase (MPO), TNF-α, and interleukin-1β (IL-1β) were measured by ELISA. At 24 weeks after inoculation, mucosal atrophy and mucous metaplasia appeared in all infected mice. At 52 weeks after inoculation, dysplastic change was noted in 10%, 25%, and 50% of mice in the H. felis-control, H. felis-açai 5%, and H. felis-açai 10% groups, respectively. The neutrophil, monocyte, atrophy, and metaplasia grades of infected mice showed no significant difference among the H. felis-infected groups. H. felis-infected mice fed with açai berry showed no significant difference compared with H. felis-infected control mice in gastric mucosal MPO, TNF-α, and IL-1β levels. H. felis that colonized the stomachs of C57BL/6 mice provoked inflammation, and induced mucosal atrophy, metaplasia, and dysplasia. However, açai berry did not effectively prohibit the gastric carcinogenesis which was induced by chronic H. felis infection.

  7. Effect of Rickettsia felis Strain Variation on Infection, Transmission, and Fitness in the Cat Flea (Siphonaptera: Pulicidae).

    Science.gov (United States)

    Healy, Sean P; Brown, Lisa D; Hagstrom, Melena R; Foil, Lane D; Macaluso, Kevin R

    2017-07-01

    Rickettsia felis is a human pathogen transmitted by the cat flea, Ctenocephalides felis (Bouché) (str. LSU), as well as an obligate symbiont of the parthenogenic booklouse Liposcelis bostrychophila (Badonnel) (str. LSU-Lb). The influence of genetic variability in these two strains of R. felis on host specialization and fitness and possible resulting differences on infection and transmission kinetics in C. felis is unknown. Utilizing an artificial host system, cat fleas were exposed to a R. felis str. LSU-Lb-infected bloodmeal and monitored for infection at 7-d intervals for 28 d. Quantitative real-time PCR was used to determine rickettsial load and infection density in newly exposed cat fleas, and transmission frequency between cat fleas. The effect of persistent R. felis infection on cat flea F1 progeny was also assessed. At 7 d postexposure 76.7% of the cat fleas successfully acquired R. felis str. LSU-Lb. In R. felis str. LSU-Lb-exposed cat fleas, the mean infection load (6.15 × 106), infection density (0.76), and infection prevalence (91/114) were significantly greater than R. felis str. LSU infection load (3.09 × 106), infection density (0.68), and infection prevalence (76/113). A persistent R. felis str. LSU-Lb infection was detected for 28 d in adult cat fleas but neither female:male ratio distortion nor vertical transmission was observed in F1 progeny. While infection kinetics differed, with higher intensity associated with R. felis str. LSU-Lb, no distinct phenotype was observed in the F1 progeny. © The Authors 2017. Published by Oxford University Press on behalf of Entomological Society of America.

  8. Molecular evidence for the presence of Rickettsia Felis in the feces of wild-living African apes.

    Directory of Open Access Journals (Sweden)

    Alpha Kabinet Keita

    Full Text Available Rickettsia felis is a common emerging pathogen detected in mosquitoes in sub-Saharan Africa. We hypothesized that, as with malaria, great apes may be exposed to the infectious bite of infected mosquitoes and release R. felis DNA in their feces.We conducted a study of 17 forest sites in Central Africa, testing 1,028 fecal samples from 313 chimpanzees, 430 gorillas and 285 bonobos. The presence of rickettsial DNA was investigated by specific quantitative real-time PCR. Positive results were confirmed by a second PCR using primers and a probe targeting a specific gene for R. felis. All positive samples were sequenced.Overall, 113 samples (11% were positive for the Rickettsia-specific gltA gene, including 25 (22% that were positive for R. felis. The citrate synthase (gltA sequence and outer membrane protein A (ompA sequence analysis indicated 99% identity at the nucleotide level to R. felis. The 88 other samples (78% were negative using R. felis-specific qPCR and were compatible with R. felis-like organisms.For the first time, we detected R. felis in wild-living ape feces. This non invasive detection of human pathogens in endangered species opens up new possibilities in the molecular epidemiology and evolutionary analysis of infectious diseases, beside HIV and malaria.

  9. Man's other best friend: domestic cats (F. silvestris catus) and their discrimination of human emotion cues.

    Science.gov (United States)

    Galvan, Moriah; Vonk, Jennifer

    2016-01-01

    The ability of domestic dogs (C. lupus famaliaris) to follow and attend to human emotion expressions is well documented. It is unknown whether domestic cats (F. silvestris catus) possess similar abilities. Because cats belong to the same order (Carnivora), but did not evolve to live in complex social groups, research with them enables us to tease apart the influence of social structure versus domestication processes on the capacity to recognize human communicative cues, such as emotions. Two experiments were conducted to determine the extent to which domestic cats discriminate between human emotion cues. The first experiment presented cats with facial and postural cues of happiness and anger from both an unfamiliar experimenter and their familiar owner in the absence of vocal cues. The second experiment presented cats with vocal cues of human emotion through a positively or negatively charged conversation between an experimenter and owner. Domestic cats were only modestly sensitive to emotion, particularly when displayed by their owner, suggesting that a history of human interaction alone may not be sufficient to shape such abilities in domestic cats.

  10. Seroprevalence and risk factors for Rickettsia felis exposure in dogs from Southeast Queensland and the Northern Territory, Australia.

    Science.gov (United States)

    Hii, Sze-Fui; Abdad, Mohammad Y; Kopp, Steven R; Stenos, John; Rees, Robert L; Traub, Rebecca J

    2013-06-03

    The recent detection of Rickettsia felis DNA in dogs in Australia suggests that dogs are potential mammalian reservoir hosts for this emerging rickettsia. To date, there is no published report addressing the seroprevalence of R. felis in dogs in Australia. Antigens for R. felis were produced by inoculating confluent XTC-2 monolayer cell cultures with three pools of cat flea (Ctenocephalides felis) homogenates. Infection was confirmed by real-time (qPCR), conventional or nested PCRs targeting the ompB, gltA, 17 kDa and ompA genes. Two hundred and ninety-two dogs from Southeast Queensland and the Northern Territory were tested for the presence of R. felis antibodies using a microimmunofluorescence (IF) test and the seroprevalence and associated risk factors for exposure were determined using both uni- and multi-variate analyses. Rickettsia felis was successfully isolated in cell culture from all three cat-flea pools. One hundred and forty-eight dogs (50.7%) showed seropositivity with titres ≥64 and 54 (18.5%) with titres ≥128. At antibody titres ≥64, dogs with active ectoparasite control were less likely to be seropositive to R. felis (OR: 2.60; 95% CI: 1.20 - 5.56). This first reported isolation of R. felis in cell culture in Australia allowed for the production of antigen for serological testing of dogs. Results of this serological testing reflects the ubiquitous exposure of dogs to R. felis and advocate for owner vigilance with regards to ectoparasite control on domestic pets.

  11. Evaluation of Felis domesticus allergen I as a possible autoallergen in cats with eosinophilic granuloma complex

    NARCIS (Netherlands)

    Wisselink, Marinus A.; van Ree, Ronald; Willemse, Ton

    2002-01-01

    OBJECTIVE: To investigate the role of Felis domesticus allergen I (Feld I) in the pathogenesis of eosinophilic granuloma complex (EGC) in cats. ANIMALS: 7 healthy cats and 6 cats with EGC. PROCEDURE: Epidermis was removed from 4 areas. Rubber stoppers filled with Feld I, saline (0.9% NaCl) solution,

  12. Rickettsia felis and Bartonella spp. in fleas from cats in Albania.

    Science.gov (United States)

    Silaghi, Cornelia; Knaus, Martin; Rapti, Dhimiter; Shukullari, Enstela; Pfister, Kurt; Rehbein, Steffen

    2012-01-01

    Fleas can serve as vectors for bacterial pathogens like Bartonella and Rickettsia species, which have been isolated worldwide. However, the knowledge of the epidemiology of vector-borne diseases in general and thus on flea-borne diseases in Albania is limited. Therefore, from 78 free-roaming cats in Tirana, Albania, fleas (371 Ctenocephalides felis and 5 Ctenocephalides canis) were collected to examine them for the presence of Rickettsia and Bartonella species. Ten of the 371 C. felis (2.7%) were positive for Rickettsia felis, and 24 (6.5%) for Bartonella spp. (B. henselae and B. clarridgeiae). In total, fleas from 15 cats (19.2%) were positive for either one or the other of the pathogens. The results of this study provided evidence for the presence of R. felis (causing flea-borne spotted fever) and Bartonella spp. (causing cat scratch disease) in Albania. Thus, these infectious diseases should be considered as differential diagnoses when febrile symptoms are presented, especially after contact with cats or their fleas.

  13. INFECTION BY Rickettsia felis IN OPOSSUMS (Didelphis sp. FROM YUCATAN, MEXICO

    Directory of Open Access Journals (Sweden)

    Gaspar PENICHE-LARA

    2016-01-01

    Full Text Available Rickettsia felis is an emergent pathogen and the causative agent of a typhus-like rickettsiosis in the Americas. Its transmission cycle involves fleas as biological vectors (mainly Ctenocephalides felis and multiple domestic and synanthropic mammal hosts. Nonetheless, the role of mammals in the cycle of R. felis is not well understood and many efforts are ongoing in different countries of America to clarify it. The present study describes for the first time in Mexico the infection of two species of opossum (Didelphis virginiana and D. marsupialis by R. felis. A diagnosis was carried out from blood samples by molecular methods through the gltAand 17 kDa genes and sequence determination. Eighty-seven opossum samples were analyzed and 28 were found to be infected (32.1% from five out of the six studied localities of Yucatan. These findings enable recognition of the potential epidemiological implications for public health of the presence of infected synanthropic Didelphis in households.

  14. Frequency of Piroplasms Babesia microti and Cytauxzoon felis in Stray Cats from Northern Italy

    Directory of Open Access Journals (Sweden)

    Eva Spada

    2014-01-01

    Full Text Available Emerging diseases caused by piroplasms pose a health risk for man and other animals, and domestic cats have been proposed as potential reservoirs for some piroplasm infections. The aim of this study was to identify the frequency of the piroplasms Babesia microti and Cytauxzoon felis in stray cats from northern Italy and to identify possible risk factors associated with these infections. Blood samples from 260 stray cats enrolled in a trap-neuter-release (TNR program in northern Italy were examined with conventional PCR for the presence of Babesia microti and Cytauxzoon felis DNA. No sample (0.0% tested positive for C. felis, whilst B. microti DNA was detected in two samples (0.8%. Both infected cats were in good clinical condition and recovered well from the neutering surgery. One of these two cats had a triple coinfection with Babesia microti, Candidatus Mycoplasma haemominutum, and Anaplasma phagocytophilum. Evidence presented in this study indicates that the blood borne protozoans Babesia microti and Cytauxzoon felis are not widely distributed in stray cat populations in Milan, northern Italy, and that the significance of cats as a reservoir host for B. microti in this area is limited.

  15. Molecular detection of Rickettsia felis and Candidatus Rickettsia asemboensis in fleas from human habitats, Asembo, Kenya.

    Science.gov (United States)

    Jiang, Ju; Maina, Alice N; Knobel, Darryn L; Cleaveland, Sarah; Laudisoit, Anne; Wamburu, Kabura; Ogola, Eric; Parola, Philippe; Breiman, Robert F; Njenga, M Kariuki; Richards, Allen L

    2013-08-01

    The flea-borne rickettsioses murine typhus (Rickettsia typhi) and flea-borne spotted fever (FBSF) (Rickettsia felis) are febrile diseases distributed among humans worldwide. Murine typhus has been known to be endemic to Kenya since the 1950s, but FBSF was only recently documented in northeastern (2010) and western (2012) Kenya. To characterize the potential exposure of humans in Kenya to flea-borne rickettsioses, a total of 330 fleas (134 pools) including 5 species (Xenopsylla cheopis, Ctenocephalides felis, Ctenocephalides canis, Pulex irritans, and Echidnophaga gallinacea) were collected from domestic and peridomestic animals and from human dwellings within Asembo, western Kenya. DNA was extracted from the 134 pooled flea samples and 89 (66.4%) pools tested positively for rickettsial DNA by 2 genus-specific quantitative real-time PCR (qPCR) assays based upon the citrate synthase (gltA) and 17-kD antigen genes and the Rfelis qPCR assay. Sequences from the 17-kD antigen gene, the outer membrane protein (omp)B, and 2 R. felis plasmid genes (pRF and pRFd) of 12 selected rickettsia-positive samples revealed a unique Rickettsia sp. (n=11) and R. felis (n=1). Depiction of the new rickettsia by multilocus sequence typing (MLST) targeting the 16S rRNA (rrs), 17-kD antigen gene, gltA, ompA, ompB, and surface cell antigen 4 (sca4), shows that it is most closely related to R. felis but genetically dissimilar enough to be considered a separate species provisionally named Candidatus Rickettsia asemboensis. Subsequently, 81 of the 134 (60.4%) flea pools tested positively for Candidatus Rickettsia asemboensis by a newly developed agent-specific qPCR assay, Rasemb. R. felis was identified in 9 of the 134 (6.7%) flea pools, and R. typhi the causative agent of murine typhus was not detected in any of 78 rickettsia-positive pools assessed using a species-specific qPCR assay, Rtyph. Two pools were found to contain both R. felis and Candidatus Rickettsia asemboensis DNA and 1 pool

  16. Conservation inequality and the charismatic cat: Felis felicis

    Directory of Open Access Journals (Sweden)

    E.A. Macdonald

    2015-01-01

    . While the felids are widely regarded as a popular taxonomic group, the great extent to which they appealed to our respondents emphasises their potential as ambassadors for conservation. Indeed, the big cats were so highly rated that we might think of them as one, Felis felicis: a globally powerful flagship for conservation.

  17. Prevalence of feline herpesvirus-1, feline calicivirus, Chlamydophila felis and Mycoplasma felis DNA and associated risk factors in cats in Spain with upper respiratory tract disease, conjunctivitis and/or gingivostomatitis.

    Science.gov (United States)

    Fernandez, Mireia; Manzanilla, Edgar G; Lloret, Albert; León, Marta; Thibault, Jean-Christophe

    2017-04-01

    Objectives Our objective was to perform the first multicentric study in Spain to evaluate the prevalence of feline herpesvirus-1 (FHV-1), feline calicivirus (FCV), Chlamydophila felis and Mycoplasma felis in cats with upper respiratory tract disease (URTD), conjunctivitis and/or gingivostomatitis (GS) compared with control cats; and to evaluate risk factors for these clinical conditions. Methods Conjunctival and oropharyngeal swabs were collected and a questionnaire regarding signalment, lifestyle, vaccination history and clinical signs was obtained for each cat. Swabs were tested for each pathogen by real-time PCR. Results The study population consisted of 358 cats, including 98 control cats. Among the 260 diseased cats, 127 cats presented with URTD, 149 cats had conjunctivitis, 154 cats were suffering GS; many cats presented more than one clinical condition. The prevalence observed of FHV-1, FCV, C felis and M felis was, respectively, 28.3%, 48.0%, 20.5% and 46.5% in cats with URTD; 24.2%, 43.6%, 19.5% and 38.3% in cats with conjunctivitis; and 15.6%, 58.4%, 9.1% and 37.7% in cats with GS. Prevalences in the control group were 6.1%, 15.3%, 2.0% and 20.4%, respectively. Coinfections were common among all groups of cats. Risk factors were identified for all groups. FHV-1, FCV and C felis were associated with URTD and conjunctivitis. FCV was strongly associated with GS. M felis was present in a high percentage of the population in all groups, but its role in these clinical conditions remains uncertain. Vaccination was protective for URTD and GS but not for conjunctivitis. Conclusions and relevance This epidemiological study describes, for the first time, prevalence for FHV-1, FCV, C felis and M felis in Spain. In general, the prevalences found are similar to those reported in other countries. Factors associated with disease expression were also identified, which are relevant for practitioners.

  18. Blood meal identification in off-host cat fleas (Ctenocephalides felis) from a plague-endemic region of Uganda.

    Science.gov (United States)

    Graham, Christine B; Borchert, Jeff N; Black, William C; Atiku, Linda A; Mpanga, Joseph T; Boegler, Karen A; Moore, Sean M; Gage, Kenneth L; Eisen, Rebecca J

    2013-02-01

    The cat flea, Ctenocephalides felis, is an inefficient vector of the plague bacterium (Yersinia pestis) and is the predominant off-host flea species in human habitations in the West Nile region, an established plague focus in northwest Uganda. To determine if C. felis might serve as a Y. pestis bridging vector in the West Nile region, we collected on- and off-host fleas from human habitations and used a real-time polymerase chain reaction-based assay to estimate the proportion of off-host C. felis that had fed on humans and the proportion that had fed on potentially infectious rodents or shrews. Our findings indicate that cat fleas in human habitations in the West Nile region feed primarily on domesticated species. We conclude that C. felis is unlikely to serve as a Y. pestis bridging vector in this region.

  19. Obesity accelerates Helicobacter felis-induced gastric carcinogenesis by enhancing immature myeloid cell trafficking and TH17 response

    OpenAIRE

    Ericksen, Russell E.; Rose, Shannon; Westphalen, Christoph Benedikt; Shibata, Wataru; Muthupalani, Sureshkumar; Tailor, Yagnesh; Friedman, Richard A.; Han, Weiping; Fox, James G.; Ferrante, Anthony W.; Wang, Timothy C.

    2013-01-01

    Objective: To investigate the role of obesity-associated inflammation and immune modulation in gastric carcinogenesis during Helicobacter-induced chronic gastric inflammation. Design: C57BL/6 male mice were infected with H felis and placed on a high-fat diet (45% calories from fat). Study animals were analysed for gastric and adipose pathology, inflammatory markers in serum, stomach and adipose tissue, and immune responses in blood, spleen, stomach and adipose tissue. Results: H felis...

  20. Desenvolvimento dos fungos Metarhizium anisopliae (Metschnikoff, 1879 Sorokin, 1883 E Beauveria bassiana (Balsamo Vuillemin, 1912 sobre Ctenocephalides felis felis (Bouché, 1835 Development of the fungi Metarhizium anisopliae (Metschnikoff, 1879 Sorokin, 1883 and Beauveria bassiana (Balsamo Vuillemin, 1912 on the Ctenophephalides felis felis (Bouché, 1835

    Directory of Open Access Journals (Sweden)

    Denise R. De Melo

    2007-09-01

    Full Text Available A pulga Ctenocephalides felis felis é um parasita causador dermatites alérgicas e também pode transmitir diversos agentes etiológicos aos animais domésticos e aos homens. O objetivo deste trabalho foi verificar o desenvolvimento do fungo sobre a cutícula da pulga, através da microscopia eletrônica de varredura. Os isolados fúngicos testados foram o Metarhizium anisopliae 959 e Beauveria bassiana 986, ambos na concentração 10(8 conídios/ml. Após a exposição dos isolados fúngicos no período de duas, 15, 26 e 96 horas , o material foi processado para a microscopia eletrônica de varredura. Com a obtenção das micrografias, pode-se observar que com 2 horas após exposição aos fungos, os conídios estavam aderidos por toda a cutícula, situando-se preferencialmente nas membranas intersegmentais do abdome. Com 15 horas observou-se a formação do tubo de germinação e a cabeça do apressório e após 26 horas foi possível observar as ramificações e o engrossamento das hifas sobre a cutícula das pulgas. Os resultados indicam que os fungos testados foram capazes de se desenvolver sobre a cutícula de C. f. felis.The flea Ctenocephalides felis felis is a parasite that causes allergic dermatitis and also may transmit etiologic agents to domestic animals and humans. This study investigated by scanning electron microscopy the development of entomopathogenic fungi on flea cuticle. Fleas were exposed to conidia (10(8 ml-1 of Metarhizium anisopliae (isolate 959 or Beauveria bassiana (isolate 986. Following standard protocols for electron microscopy, the specimens were prepared 2, 15, 26 and 96 h after infection. The micrography revealed that 2 h after fungus exposure, conidia attachments encompassed the entire flea cuticle, especially on abdominal intersegmental membranes. The emergence of germ tubes and appressoria formation occurred at 15 h, thickening and branching of hyphae on the flea cuticle was noted at 26 h. Therefore, both of

  1. Freqüência de fungos dermatófitos em (Felis catus) infectados e não infectados pelo vírus da imunodeficiência felina

    OpenAIRE

    Ribeiro, Eduardo Alcântara

    2005-01-01

    A dermatofitose é uma infecção fúngica superficial que acomete os animais e a espécie humana. Os gatos domésticos são um importante reservatório e fonte de infecção dos esporos dermatofíticos. Considerando a suscetibilidade dos portadores do vírus da imunodeficiência felina (FIV) às infecções fúngicas, o contato com esses animais pode aumentar a exposição de seres humanos a fungos patogênicos e representar um desafio para o controle da dermatofitose zoofílica. O presente estudo teve como obje...

  2. Correlação entre a pressão arterial média e o fluxo sangüíneo na artéria oftalmica externa em gatos (felis catus linnaeus, 1758

    Directory of Open Access Journals (Sweden)

    Gentil Ferreira Gomçalves

    2008-02-01

    Full Text Available There were used 20 mixed breed cats, both male and female, with body mass between 2 and 4 kilograms, that received anesthesia with tiletamine and zolazepam (6,0 mg/kg. The femoral artery was assepticale cannulated and a manometer connected to an air column was connected to the catheter. The MAP was surveyed before and every 15 minutes until the end of the ultrasound examination. The flow of the external ophthalmic artery was measured through the ultrasond equipment, with an echo-doppler and a sectorial transducer of 6.0 MHz, directly applied to the cornea. Each eye had the artery flow surveyed by the equipment's own device, 3 samples being taken. The vascular resistance index was calculated based on the mean values of systolic and diastolic flow of each vasses. An average value for the MAP of 144.9 ± 26.68 mmHg and a flow of 14.28 ± 41.3 cm/sec for the external ophthalmic artery in the right eye in systole, 23.95 ± 11.46 cm/sec in diastole and 42.75 ± 12.64 cm/sec in the left eye in systole, 25.45 ± 9.61 cm/sec in diastole, were verified, there being no significant difference between the eyes. The calculated index of vascular resistance was of 0.4175 ± 0.0774 for the external ophthalmic artery in the right eye and 0,4015 ± 0.0719 for the left eye, without any significant difference between the eyes. The results point to an intrinsic mechanism of flow control, controlled by local factors in the external ophthalmic artery. The values of the resistance index denote a low flow artery. Concluding, this study revealed the reference values, above cited, for the MAP and the blood flow in the external ophthalmic artery in mixed breed cats, anesthetized with tiletamine and zolazepam, and the information that there is no correlation between these values.

  3. Toxoplasma gondii, Dirofilaria immitis, feline immunodeficiency virus (FIV), and feline leukemia virus (FeLV) infections in stray and pet cats (Felis catus) in northwest China: co-infections and risk factors.

    Science.gov (United States)

    Cong, Wei; Meng, Qing-Feng; Blaga, Radu; Villena, Isabelle; Zhu, Xing-Quan; Qian, Ai-Dong

    2016-01-01

    This study was conducted to estimate the prevalence of Toxoplasma gondii, Dirofilaria immitis, feline immunodeficiency virus (FIV), and feline leukemia virus (FeLV) infections among stray and pet cats in Lanzhou, northwest China, and to identify the influence of age, gender, and regions on seropositivity. T. gondii antibodies were examined in cat sera by the modified agglutination test (MAT). The circulating antigens of D. immitis and FeLV and specific antibodies to FIV were examined using kits commercially available. The overall prevalence of T. gondii, FIV, FeLV, and D. immitis was 19.34, 9.12, 11.33, and 3.04 %, respectively. For the genetic characterization of T. gondii genotypes in cats, genomic DNA was extracted from the seropositive cats and the T. gondii B1 gene was amplified using a semi-nested PCR. DNA samples giving positive B1 amplification were then genotyped using multilocus PCR-RFLP. Two T. gondii genotypes (ToxoDB#9 and ToxoDB#1) were identified. Results of the multivariate logistic regression analysis showed that older cats are more likely to be seropositive than juveniles for T. gondii, FIV, FeLV, and D. immitis. This is the first report of T. gondii genotypes in cats in northwest China. Moreover, the present study is the first study of retrovirus and D. immitis seroprevalence in cats in China. The results revealed that T. gondii, FIV, and FeLV infections are common in stray and pet cats in northwest China.

  4. Surface ultrastructure of the adult stage of Acanthotrema felis (Trematoda: Heterophyidae)

    Science.gov (United States)

    Sohn, Woon-Mok; Seo, Min

    2003-01-01

    The surface ultrastructure of Acanthotrema felis (Trematoda: Heterophyidae) adults, recovered from a kitten experimentally infected with the metacercariae, was observed using a scanning electron microscope. The worm was leaf-like, ventrally concave and covered with scale-like multi-pointed tegumental spines. The spines on the anterior surface were short but broad, and had 10-12 pointed tips. The cytoplasmic processes protruded around the spines, like pockets for the spines. The ventrogenital opening was crescent, or kidney-shaped, and had protuberances with minute spines on its surrounding tegument. The spines on the posterior surface were long, but narrow, with 6-8 pointed tips. The cytoplasmic processes on this tegument were ridge-like, and elevated along the row of the spines. The surface ultrastructure of A. felis is generally similar to that of other heterophyid flukes, but some features are characteristic, and may be of taxonomic and bio-ecological significance. PMID:12815322

  5. A RARE CASE OF HEPATOCELLULAR CARCINOMA IN THE ARABIAN SAND CAT (FELIS MARGARITA HARRISONI).

    Science.gov (United States)

    Chege, Stephen M; Vissiennon, Théophile; Cavero, Tatiana; Kinne, Joerg; Toosy, Arshad

    2015-12-01

    Primary liver cancer is uncommon and is generally classified as hepatocellular carcinoma (HCC), bile duct carcinoma, neuroendocrine (or carcinoid) tumor, and mesenchymal tumor (sarcoma). Here we describe the gross and histopathology characteristics of a rare HCC in a captive Arabian sand cat (Felis margarita harrisoni) held at Al Ain Zoo, United Arab Emirates. The description of this case in the Arabian sand cat adds to the current knowledge of hepatocellular carcinoma in captive nondomestic felids.

  6. Isolation of Rickettsia felis in the Mosquito Cell Line C6/36

    OpenAIRE

    Horta, Maurício C.; LABRUNA, Marcelo B; Durigon, Edison L.; Schumaker, Teresinha T. S.

    2006-01-01

    We report the isolation and establishment of Rickettsia felis in the C6/36 cell line. Rickettsial growth was intense, always with 90 to 100% of cells being infected after few weeks. The rickettsial isolate was confirmed by testing infected cells by PCR and sequencing fragments of three major Rickettsia genes (gltA, ompB, and the 17-kDa protein gene).

  7. Molecular detection of Rickettsia felis and Candidatus Rickettsia Asemboensis in fleas from human habitats, Asembo, Kenya

    OpenAIRE

    Jiang, J.; Maina, A.N; Knobel, D.L.; Cleaveland, S.; Laudisoit, A.; Wamburu, K.; Ogola, E.; Parola, P.; Breiman, R.F.; Njenga, M.K.; Richards, A.L.

    2013-01-01

    The flea-borne rickettsioses murine typhus (Rickettsia typhi) and flea-borne spotted fever (FBSF) (Rickettsia felis) are febrile diseases distributed among humans worldwide. Murine typhus has been known to be endemic to Kenya since the 1950s, but FBSF was only recently documented in northeastern (2010) and western (2012) Kenya. To characterize the potential exposure of humans in Kenya to flea-borne rickettsioses, a total of 330 fleas (134 pools) including 5 species (Xenopsylla cheopis, Ctenoc...

  8. Observations on the lynx Felis caracal in the Bedford district

    African Journals Online (AJOL)

    servals, brown and spotted hyaenas, hunting dogs and lynxes (rooikat). Much of our present knowledge of this species comes from observations on specimens in captivity_ For example,. Kralik (1967), Krishne Gowda (1967) and Cade(1968) have described the behaviour of litters of kittens; Smithers. (I 97 I) recorded the ...

  9. First Report of Toxoplasma gondii, Dirofilaria immitis, and Chlamydia felis Infection in Stray and Companion Cats in Northeastern and Eastern China.

    Science.gov (United States)

    Kang, Yuan-Huan; Cong, Wei; Qin, Si-Yuan; Shan, Xiao-Feng; Gao, Yun-Hang; Wang, Chun-Feng; Qian, Ai-Dong

    2016-10-01

    Feline vector-borne diseases have increasingly become a focus of interest in recent years. Toxoplasma gondii, Dirofilaria immitis, and Chlamydia felis are common pathogens of cats that can affect humans among different countries all over the world. However, information about prevalence of T. gondii and C. felis is available in China, but information about coinfection of T. gondii, D. immitis, and C. felis in cats is limited. Thus, this study was conducted to estimate the prevalence of these pathogens' infection among stray and companion cats in northeastern and eastern China and identify the influence of age, gender, types, and regions on seropositivity. The circulating antigens of D. immitis and specific antibodies to T. gondii and C. felis were examined using kits commercially available. The overall prevalence of T. gondii, D. immitis, and C. felis was 15.43%, 1.93%, and 9.90%, respectively. Coinfection was common, and infection with both T. gondii and C. felis was the most common coinfection (22.32%). Stray cats have significantly higher seroprevalences than companion cats (p immitis, and C. felis infection in cats in northeastern and eastern China. The findings of this study reveal that T. gondii, D. immitis, and C. felis are prevalent in stray and companion cats in northeastern China, which provided baseline data for the effective prevention and control of these parasites' prevalence in these regions and other parts of China.

  10. Aerospace Example

    Data.gov (United States)

    National Aeronautics and Space Administration — This is a textbook, created example for illustration purposes. The System takes inputs of Pt, Ps, and Alt, and calculates the Mach number using the Rayleigh Pitot...

  11. Eficácia do fipronil em cães infestados com diferentes cargas parasitárias de Ctenocephalides felis felis (Siphonaptera: Pulicidae

    Directory of Open Access Journals (Sweden)

    Cristiane Nunes Coelho

    2015-03-01

    Full Text Available O objetivo do trabalho foi avaliar através de teste in vivo, a eficácia e o período residual de proteção do fipronil 10% "top spot" em cães infestados com diferentes cargas parasitárias de Ctenocephalides felis felis. Foram utilizados 24 cães da raça Beagle, compondo seis animais por grupo. Os cães foram divididos em quatro grupos. Os cães dos grupos controles I e II não receberam tratamento, enquanto que os cães dos grupos tratados I e II receberam tratamento com formulação de fipronil 10% "top spot". Os cães dos grupos controle I e tratado I foram infestados com 100 pulgas adultas não alimentadas, e os cães dos grupos controle II e tratado II foram infestados com 300 pulgas adultas não alimentadas. As infestações foram realizadas nos dias, -2, +5, +12, +19, +26, +33 e +40 e nos dias +2, +7, +14, +21, +28, +35 e +42 foi realizada retirada mecânica e contagem de pulgas para avaliação. As eficácias pulguicidas, para o grupo tratado I, nos dias +2, +7, +14, +21, +28, +35 e +42, foram respectivamente 99,36%; 99,73%; 99,48%; 99,74%; 99,75%; 95,06% e 67,62%. As eficácias pulguicidas, para o grupo tratado II, avaliadas nos mesmos dias, foram respectivamente 100%; 100%; 100%; 100%; 99,91%; 95,60% e 68,55%. O fipronil mostrou-se eficaz na eliminação das pulgas em cães até o dia +35. A análise estatística comparativa entre as médias de pulgas vivas, entre os grupos controle I e tratado I, demonstrou que ocorreu diferença significativa (p≤0,05 para os desafios em todos os dias experimentais, após o tratamento. Os grupos controle II e tratado II também apresentaram diferença significativa (p≤0,05 para os desafios em todos os dias experimentais, após o tratamento. A análise estatística entre os grupos tratados I e II demonstrou que não ocorreu diferença significativa (p≥0,05 para os desafios em todos os dias experimentais. O desafio foi encerrado no dia +42 já que a eficácia do fipronil nos grupos tratados I

  12. Obesity accelerates Helicobacter felis-induced gastric carcinogenesis by enhancing immature myeloid cell trafficking and TH17 response.

    Science.gov (United States)

    Ericksen, Russell E; Rose, Shannon; Westphalen, Christoph Benedikt; Shibata, Wataru; Muthupalani, Sureshkumar; Tailor, Yagnesh; Friedman, Richard A; Han, Weiping; Fox, James G; Ferrante, Anthony W; Wang, Timothy C

    2014-03-01

    To investigate the role of obesity-associated inflammation and immune modulation in gastric carcinogenesis during Helicobacter-induced chronic gastric inflammation. C57BL/6 male mice were infected with H felis and placed on a high-fat diet (45% calories from fat). Study animals were analysed for gastric and adipose pathology, inflammatory markers in serum, stomach and adipose tissue, and immune responses in blood, spleen, stomach and adipose tissue. H felis-induced gastric carcinogenesis was accelerated in diet-induced obese mice compared with lean controls. Obesity increased bone marrow-derived immature myeloid cells in blood and gastric tissue of H felis-infected mice. Obesity also led to elevations in CD4 T cells, IL-17A, granulocyte macrophage colony-stimulating factor, phosphorylated STAT3 and prosurvival gene expression in gastric tissue of H felis-infected mice. Conversely, in adipose tissue of obese mice, H felis infection increased macrophage accumulation and expression of IL-6, C-C motif ligand 7 (CCL7) and leptin. Finally, the combination of obesity and gastric inflammation synergistically increased serum proinflammatory cytokines, including IL-6. Here, we have established a model to study the molecular mechanism by which obesity predisposes individuals to gastric cancer. In H felis-infected mice, obesity increased proinflammatory immune responses and accelerated gastric carcinogenesis. Interestingly, gastric inflammation augmented obesity-induced adipose inflammation and production of adipose-derived factors in obese, but not lean, mice. Our findings suggest that obesity accelerates Helicobacter-associated gastric cancer through cytokine-mediated cross-talk between inflamed gastric and adipose tissues, augmenting immune responses at both tissue sites, and thereby contributing to a protumorigenic gastric microenvironment.

  13. Eficácia comparativa de duas formulações de uso tópico contendo fipronil 10% no controle de Ctenocephalides felis felis em gatos Comparative efficacy of two topical formulations containing 10% fipronil on the control of Ctenocephalides felis felis on cats

    Directory of Open Access Journals (Sweden)

    Michelle Godan de Freitas Tancredi

    2009-12-01

    Full Text Available No presente trabalho, foram avaliadas, comparativamente, duas formulações comerciais tópicas, contendo 10% de fipronil, para o controle da pulga Ctenocephalides felis felis em gatos. O experimento foi realizado no Laboratório de Quimioterapia Experimental em Parasitologia Veterinária do Departamento de Parasitologia Animal, Instituto de Veterinária, da Universidade Federal Rural do Rio de Janeiro. Foram empregados 18 gatos, sem raça definida, divididos em três grupos de seis. Um grupo permaneceu sem tratamento (controle, e os demais foram medicados com uma formulação referência do mercado veterinário ou com uma nova formulação em teste. Os animais tratados receberam 0,5 mL do produto ao longo da região dorso-cervical e foram infestados nos dias - 2, +5, +12, +19, +26 e +33. A primeira avaliação foi realizada quatro dias após a primeira infestação e, as demais, 48 horas após cada infestação, por meio do comb test. Ambas as formulações testadas foram eficazes até o dia +35 após o tratamento, não havendo diferenças entre seus níveis de eficácia ao longo do período experimental. A nova formulação, contendo fipronil a 10%, apresentou a eficácia desejada no controle de C. f. felis em gatos.The goal of the present study was to evaluate the comparative efficacy of two topical formulations containing 10% fipronil on the control of Ctenocephalides felis felis on cats. The trial was performed at the Laboratory of Experimental Chemotherapy in Veterinary Parasitology from the Department of Animal Parasitology of the Institute of Veterinary of the Universidade Federal Rural do Rio de Janeiro. Eighteen mixed-breed cats were divided in three groups of six animals each. One group remained without treatment (control. The other groups received as treatment the two topical formulations, a commercial reference and the novel one, both containing 10% fipronil. Treated animals received 0.5 mL of product along their cervical region

  14. La cryptosporidiose zoonosique humaine due à Cryptosporidium felis dans le monde

    Directory of Open Access Journals (Sweden)

    Raccurt C.P.

    2007-03-01

    Full Text Available La cryptosporidiose est l’une des principales causes de diarrhée aiguë de l’enfant dans les pays en voie de développement, et de diarrhée chronique chez les sujets immunodéprimés infectés par le virus de l’immunidéficience humaine (VIHj. L’identification de l’espèce est impossible par les méthodes conventionnelles et fait appel aux techniques de biologie moléculaire. La cryptosporidiose humaine est due le plus souvent à Cryptosporidium hominis et à Cryptosporidium parvum. Des espèces et des génotypes spécifiques d’animaux, dont Cryptosporidium felis, parasitent également l’Homme. Une revue systématique des cas humains dus à C. felis publiés dans le monde pjermet d’en décompter 58 dans toutes les régions biogéographiques, excepté l’Australie et l’Océanie. Adultes et enfants sont la cible de ce parasite. Chez ces 58 sujets parasités par C. felis, 83% sont VIH-positifs. Cette zoonose se rencontre également chez des sujets apparemment immunocompétents. Les pays en voie de développement semblent plus concernés probablement à cause d’une transmission environnementale plus présente que dans les pays développés. Cette cryptosporidiose zoonosique demande à être plus largement évaluée dans les pays tropicaux.

  15. NCBI nr-aa BLAST: CBRC-CFAM-12-0016 [SEVENS

    Lifescience Database Archive (English)

    Full Text Available CBRC-CFAM-12-0016 ref|NP_001009331.1| cannabinoid receptor 1 [Felis catus] sp|O02777|CNR1_FELCA Cannabi...noid receptor 1 (CB1) (CB-R) gb|AAB53440.1| CB1 cannabinoid receptor [Felis catus] NP_001009331.1 0.0 97% ...

  16. NCBI nr-aa BLAST: CBRC-ACAR-01-0720 [SEVENS

    Lifescience Database Archive (English)

    Full Text Available CBRC-ACAR-01-0720 ref|NP_001009364.1| butyrylcholinesterase [Felis catus] sp|O62760|CHLE_FELCA Choli...nesterase precursor (Acylcholine acylhydrolase) (Choline esterase II) (Butyrylcholine esterase) (Pseudocholi...nesterase) gb|AAC06261.1| butyrylcholinesterase precursor [Felis catus] NP_001009364.1 1e-108 43% ...

  17. NCBI nr-aa BLAST: CBRC-ACAR-01-0695 [SEVENS

    Lifescience Database Archive (English)

    Full Text Available CBRC-ACAR-01-0695 ref|NP_001009364.1| butyrylcholinesterase [Felis catus] sp|O62760|CHLE_FELCA Choli...nesterase precursor (Acylcholine acylhydrolase) (Choline esterase II) (Butyrylcholine esterase) (Pseudocholi...nesterase) gb|AAC06261.1| butyrylcholinesterase precursor [Felis catus] NP_001009364.1 1e-107 43% ...

  18. NCBI nr-aa BLAST: CBRC-XTRO-01-3294 [SEVENS

    Lifescience Database Archive (English)

    Full Text Available CBRC-XTRO-01-3294 ref|NP_001009364.1| butyrylcholinesterase [Felis catus] sp|O62760|CHLE_FELCA Choli...nesterase precursor (Acylcholine acylhydrolase) (Choline esterase II) (Butyrylcholine esterase) (Pseudocholi...nesterase) gb|AAC06261.1| butyrylcholinesterase precursor [Felis catus] NP_001009364.1 1e-134 49% ...

  19. The fitoaty: an unidentified carnivoran species from the Masoala ...

    African Journals Online (AJOL)

    Felis were introduced to Madagascar by the 17th century. (Flacourt 1658, Kerr 1792). Both domesticated and wild or feral cats exist on the island today, but whether these represent a single species (Felis catus) or two (F. catus and F. silvestris) remains unknown. The relationship of Madagascar's wild living cats to the African ...

  20. Atividade residual in vitro do pelo de cobertura de cães tratados com dinotefuran sobre larvas e adultos de Ctenocephalides felis felis (Bouché, 1835 (Siphonaptera: pulicidae Residual activity in vitro of treated dog's hair coat with dinotefuran on larvae and adults of Ctenocephalides felis felis (Bouché, 1835 (Siphonaptera: Pulicidae

    Directory of Open Access Journals (Sweden)

    Thaís R. Correia

    2008-12-01

    Full Text Available O objetivo deste trabalho foi avaliar a atividade in vitro do resíduo em pelo de cobertura de cães tratados com dinotefuran sobre larvas e adultos de Ctenocephalides felis felis. Foram utilizadas três cadelas da Raça Beagle: a nº 1 foi tratada com uma formulação spray de dinotefuran a 0,834%, a nº 2 com uma formulação "strip-on" de dinotefuran a 30% e a nº 3 foi mantida sem tratamento. Pequenas áreas foram tricotomizadas nos dias 2, 9, 16, 23, 30, 37 e 44 após o tratamento. Para avaliação adulticida e larvicida, foram utilizados pulgas de uma colônia mantida em laboratório. Seis repetições com cada uma contendo 10 exemplares de C. f. felis, acondicionados em tubos de ensaio, da etapa correspondente foram utilizados por dia de desafio. Em cada repetição foi adicionado 0,02 gramas de pelo de cada área tricotomizada e dieta na etapa de larvas. O material da etapa adulto foi avaliado num período de 24 horas, o da etapa larvas foi avaliado após 20 dias de cada desafio. O resíduo no pêlo de cães tratados com ambas as formulações de dinotefuran foi eficaz no controle de larvas por um período de 44 dias, e no controle de adultos as formulações spray e a "strip-on" foram eficazes por um período de 16 e 23 dias, respectivamente.The aim of this study was to evaluate the residual activity of treated dog's hair coat with dinotefuran on larvae and adults of Ctenocephalides felis felis. Three female Beagle dogs were used. One female dog was treated with 0.834% dinotefuran spray, the second was treated with 30% dinotefuran strip-on and the third was not treated. Some areas of dog's hair were clipped on days 2, 9, 16, 23, 30, 37 and 44 after treatment. For the evaluation of adulticidal and larvicidal activities, flea adults and larvae from the laboratory colony were used. Six repetitions were used with 10 samples of each flea stage per day, placed in assay tubes. In each repetition we added 0.02 g of treated or untreated dog

  1. Implantação de colônia de Ctenocephalides felis felis (Bouché, 1835 e determinação do período de desenvolvimento dos estágios imaturos sob condições controladas / Implantation of a Ctenocephalides felis felis (Bouché, 1835 colony and determination of the development period of the immature stages under controlled conditions

    Directory of Open Access Journals (Sweden)

    Karina Carrão Castagnolli

    2008-09-01

    Full Text Available O presente estudo teve como objetivo a implantação de uma colônia de pulgas (Ctenocephalides felis felis, para determinação do período de desenvolvimento dos estágios imaturos desse inseto, quando mantido emcondições controladas. Para isto, gatos foram infestados artifi cialmente com estágios adultos de C. felis felis e mantidos em gaiolas metálicas suspensas. Diariamente, durante trinta dias, os ovos de pulgas provenientes dos gatos eram recolhidos e mantidos em estufa do tipo B.O.D., com Tode 28±1oC e umidade relativa de 75%. O tempo de eclosão larval foi em média de dois a quatro dias, as pré-pupas surgiram no período de seis a nove dias, a pupação iniciou-se com nove a onze dias e a emergência dos adultos variou de quatorze a vinte dias. Nessas condições climáticas associadas à dieta adotada, foi possível uma recuperação de adultos de aproximadamente 90%, resultados favoráveis à manutenção de umacolônia.

  2. A hybrid type undulator for far-infrared FELs at FELI

    Energy Technology Data Exchange (ETDEWEB)

    Zako, A.; Miyauchi, Y.; Koga, A. [Free Electron Laser Research Institute, Inc., Osaka (Japan)] [and others

    1995-12-31

    Two FEL facilities of the FELI are now operating in the wavelength range of 1-20 {mu}m. A 3.2-m hybrid type undulator ({lambda}{sub u}=80mm, N=40) has been designed for far-infrared FELs and will be installed in December. It can cover the wavelength of 20-60 {mu}m by changing K-value from 1 to 2.7 for a 28.0-MeV electron beam. It is composed of ferrite magnetic poles and Sm-Co permanent magnets. Commonly wound coils induce alternating magnetic field in ferrite poles. Combination of the induced field and the permanent magnet field can controls the magnetic field between the undulator gap.

  3. Ink from longfin inshore squid, Doryteuthis pealeii, as a chemical and visual defense against two predatory fishes, summer flounder, Paralichthys dentatus, and sea catfish, Ariopsis felis.

    Science.gov (United States)

    Derby, Charles D; Tottempudi, Mihika; Love-Chezem, Tiffany; Wolfe, Lanna S

    2013-12-01

    Chemical and visual defenses are used by many organisms to avoid being approached or eaten by predators. An example is inking molluscs-including gastropods such as sea hares and cephalopods such as squid, cuttlefish, and octopus-which release a colored ink upon approach or attack. Previous work showed that ink can protect molluscs through a combination of chemical, visual, and other effects. In this study, we examined the effects of ink from longfin inshore squid, Doryteuthis pealeii, on the behavior of two species of predatory fishes, summer flounder, Paralichthys dentatus, and sea catfish, Ariopsis felis. Using a cloud assay, we found that ink from longfin inshore squid affected the approach phase of predation by summer flounder, primarily through its visual effects. Using a food assay, we found that the ink affected the consummatory and ingestive phase of predation of both sea catfish and summer flounder, through the ink's chemical properties. Fractionation of ink showed that most of its deterrent chemical activity is associated with melanin granules, suggesting that either compounds adhering to these granules or melanin itself are the most biologically active. This work provides the basis for a comparative approach to identify deterrent molecules from inking cephalopods and to examine neural mechanisms whereby these chemicals affect behavior of fish, using the sea catfish as a chemosensory model.

  4. Perfil hematológico, bioquímico sérico e sorológico de Felis domesticus com lagochilascariose experimental Hematological, serum biochemical and serological profile of Felis domesticus with experimental lagochilascariosis

    Directory of Open Access Journals (Sweden)

    Mariana Félix de Souza Prudente

    2008-10-01

    Full Text Available No presente trabalho, avaliou-se o hemograma, diversas proteínas e enzimas séricas ou plasmáticas e a produção de anticorpos específicos em Felis domesticus, experimentalmente infectados por Lagochilascaris minor. Verificou-se nos animais infectados aumento de leucócitos totais, principalmente eosinófilos; queda do número de plaquetas; aumento de aspartato-aminotransferase e alanina-aminotransferase; e principalmente a presença de anticorpos IgG específicos para antígenos do parasita. A reação com extrato bruto de parasitas adultos mostrou-se mais específica, permitindo a discriminação de soros de animais: não infectados, com infecção por outros parasitas, e com lagochilascariose. Esta é a primeira descrição da padronização de uma reação sorológica para diagnóstico da lagochilascariose em Felis domesticus.The present study evaluated the hemogram, different proteins, plasma enzymes, serum enzymes and specific antibody production of Felis domesticus experimentally infected by Lagochilascaris minor. The infected animals were seen to present increased total leukocytes (particularly eosinophils, decreased platelet counts, increased aspartate-aminotransferase and alanine-aminotransferase and, especially, the presence of specific IgG antibodies against antigens of the parasite. The reaction with crude extract of adult parasites was shown to be more specific, thereby enabling serum discrimination between the animals: non-infected, infected with other parasites and infected with lagochilascariosis. This is the first description of the standardization of a serological reaction for diagnosing lagochilascariosis in Felis domesticus.

  5. Aspectos morfométricos do timo em gatos domésticos (Felis domesticus Morphometric aspects of the thymus in domestic cats (Felis domesticus

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    Camila E. Barroso

    2012-12-01

    Full Text Available O timo é um órgão linfático primário que desenvolve sua atividade em organismos jovens. Apesar de sua função ser responsável por mecanismos fundamentais na aquisição das defesas e conseqüentes respostas orgânicas, ela ainda não está totalmente esclarecida, nem tampouco as bases morfológicas que respondem por tais funções, como o processo de desenvolvimento e involução do órgão. Objetivou-se analisar e caracterizar os aspectos morfológicos do timo, tais como seu tamanho e volume, e aspectos histológicos do timo em gatos, correlacionando o sexo e o desenvolvimento etário. Doze timos provenientes de fetos de gatos domésticos (Felis domesticus sem raça definida (SRD, machos e fêmeas, separados em três grupos etários. O timo apresentou-se com uma coloração rosa-pálida e com duas porções, a torácica e a cervical, sendo que cada uma delas possuía um lobo direito e um lobo esquerdo em sua maioria. A porção torácica localizava-se em região de mediastino cranial, entre os pulmões e à base do coração. E a porção cervical estendia-se além das costelas em sentido cranial, estando localizada ventralmente à traqueia. A estrutura celular do timo demonstrou-se organizada com a presença de agregados concêntricos, os chamados corpúsculos tímicos, formados por células epiteliais, sustentada por uma cápsula de tecido conjuntivo de onde partiam septos que ao penetrar no órgão dividia-o em lóbulos. Ocorreram variações significativas quanto à lobação e as dimensões do timo entre indivíduos da mesma faixa etária, e entre sexos diferentes. Os valores relativos ao comprimento, espessura e largura, de maneira geral, apresentaram aumento, em conformidade ao desenvolvimento dos animais, mas com diferenças entre os sexos.The thymus is a primary lymphatic organ that develops its activity in young organisms. But despite its function is fundamental mechanisms responsible for the acquisition and subsequent body

  6. Flea (Ctenocephalides felis) control efficacy of topical indoxacarb on dogs subsequently bathed with a chlorhexidine-ketoconazole shampoo.

    Science.gov (United States)

    Armstrong, R D; Liebenberg, J E; Heaney, K; Guerino, F

    2015-08-01

    An evaluation of the effect of chlorhexidine/ketoconazole shampoo baths on the flea control efficacy of indoxacarb applied topically to dogs. We randomly allocated 18 healthy mixed-breed dogs to 3 groups: shampoo only; indoxacarb treated and medicated shampoo; and indoxacarb treated but not shampooed. Indoxacarb was administered on day 0 and dogs were shampooed on days 9 and 23. Dogs were infested with 100 adult Ctenocephalides felis initially 2 days before treatment and then weekly from days 7 to 28. Fleas were removed and counted 48 h post-infestation. Medicated shampoo use did not significantly reduce indoxacarb efficacy against C. felis. © 2015 MSD Animal Health. Australian Veterinary Journal published by Wiley Publishing Asia Pty Ltd on behalf of Australian Veterinary Association.

  7. Flea (Ctenocephalides felis) control efficacy of topical indoxacarb on dogs subsequently bathed with a chlorhexidine–ketoconazole shampoo

    Science.gov (United States)

    Liebenberg, JE; Heaney, K; Guerino, F

    2015-01-01

    Objective An evaluation of the effect of chlorhexidine/ketoconazole shampoo baths on the flea control efficacy of indoxacarb applied topically to dogs. Methods and Results We randomly allocated 18 healthy mixed‐breed dogs to 3 groups: shampoo only; indoxacarb treated and medicated shampoo; and indoxacarb treated but not shampooed. Indoxacarb was administered on day 0 and dogs were shampooed on days 9 and 23. Dogs were infested with 100 adult Ctenocephalides felis initially 2 days before treatment and then weekly from days 7 to 28. Fleas were removed and counted 48 h post‐infestation. Conclusion Medicated shampoo use did not significantly reduce indoxacarb efficacy against C. felis. PMID:26220323

  8. The genome sequence of Rickettsia felis identifies the first putative conjugative plasmid in an obligate intracellular parasite.

    Directory of Open Access Journals (Sweden)

    2005-08-01

    Full Text Available We sequenced the genome of Rickettsia felis, a flea-associated obligate intracellular alpha-proteobacterium causing spotted fever in humans. Besides a circular chromosome of 1,485,148 bp, R. felis exhibits the first putative conjugative plasmid identified among obligate intracellular bacteria. This plasmid is found in a short (39,263 bp and a long (62,829 bp form. R. felis contrasts with previously sequenced Rickettsia in terms of many other features, including a number of transposases, several chromosomal toxin-antitoxin genes, many more spoT genes, and a very large number of ankyrin- and tetratricopeptide-motif-containing genes. Host-invasion-related genes for patatin and RickA were found. Several phenotypes predicted from genome analysis were experimentally tested: conjugative pili and mating were observed, as well as beta-lactamase activity, actin-polymerization-driven mobility, and hemolytic properties. Our study demonstrates that complete genome sequencing is the fastest approach to reveal phenotypic characters of recently cultured obligate intracellular bacteria.

  9. The genome sequence of Rickettsia felis identifies the first putative conjugative plasmid in an obligate intracellular parasite.

    Science.gov (United States)

    Ogata, Hiroyuki; Renesto, Patricia; Audic, Stéphane; Robert, Catherine; Blanc, Guillaume; Fournier, Pierre-Edouard; Parinello, Hugues; Claverie, Jean-Michel; Raoult, Didier

    2005-08-01

    We sequenced the genome of Rickettsia felis, a flea-associated obligate intracellular alpha-proteobacterium causing spotted fever in humans. Besides a circular chromosome of 1,485,148 bp, R. felis exhibits the first putative conjugative plasmid identified among obligate intracellular bacteria. This plasmid is found in a short (39,263 bp) and a long (62,829 bp) form. R. felis contrasts with previously sequenced Rickettsia in terms of many other features, including a number of transposases, several chromosomal toxin-antitoxin genes, many more spoT genes, and a very large number of ankyrin- and tetratricopeptide-motif-containing genes. Host-invasion-related genes for patatin and RickA were found. Several phenotypes predicted from genome analysis were experimentally tested: conjugative pili and mating were observed, as well as beta-lactamase activity, actin-polymerization-driven mobility, and hemolytic properties. Our study demonstrates that complete genome sequencing is the fastest approach to reveal phenotypic characters of recently cultured obligate intracellular bacteria.

  10. Performance of an undulator for visible and UV FELs at FELI

    Energy Technology Data Exchange (ETDEWEB)

    Miyauchi, Y.; Zako, A.; Koga, A. [Free Electron Laser Research Institute, Inc., Osaka (Japan)] [and others

    1995-12-31

    Two infrared free electron lasers (FELs) of the FELI project are now operating in the wavelength range of 1-20{mu}m. A 2.68-m undulator has been constructed for visible and UV FELs covering the wavelength of 1-0.2{mu}m for 100-165 MeV electron beams. It generates alternating, horizontal magnetic field, and wiggles electron beam on a vertical plane. The undulator length and period are 2.68m and 40mm, respectively. The gap of undulator magnets can be changed remotely by using servomotors with an accuracy of 1 {mu}m from the control room. The maximum K-value and related magnetic field strength are 1.9 and 0.5T, respectively, when its gap is set to the minimum value of 16mm. In order to minimize magnetic field reduction due to radiation damage, Sm-Co permanent magnet was adopted. Its structure and the results of magnetic field measurement will be reported.

  11. Mesothelioma in Two Nondomestic Felids: North American Cougar (Felis concolor and Cheetah (Acinonyx jubatus

    Directory of Open Access Journals (Sweden)

    Amanda Whiton

    2013-01-01

    Full Text Available A 15-year-old male North American cougar (Felis concolor presented with a 2-day history of anorexia, restlessness, and dyspnea. White blood cell count ( cells/μL and absolute segmented neutrophil count ( cells/μL were increased, and BUN (143 mg/dL, creatinine (6.3 mg/dL, and phosphorus (8.5 mg/dL concentrations indicated chronic renal disease. Thoracic radiographs showed severe pleural and pericardial effusion. During attempts to remove the fluid, cardiac tamponade developed and the cat died. At necropsy, nodular masses decorated the pericardium at the level of the base of the heart. The final microscopic diagnosis was mesothelioma of the pericardium, tunica adventitia of the main pulmonary artery, left auricle epicardium, and left ventricular epicardium. A 15-year-old female cheetah (Acinonyx jubatus was evaluated for acute respiratory distress. The white blood cell count ( cells/μL and absolute segmented neutrophil count ( cells/μL were increased. Radiographically pleural effusion and a cranial thoracic mass were seen. The cheetah was euthanized, and a gross diagnosis of disseminated pleural mesothelioma with thoracic effusion was made. Histologically, pleural mesothelioma was confirmed with local invasion of the lung and pulmonary arterial emboli and infarction. In both cases, a diagnosis of mesothelioma was made based on cellular morphology, microscopic architecture, and neoplastic cell coexpression of cytokeratin and vimentin.

  12. Avaliação das associações anestésicas: atropina/cetamina-s/xilazina e acepromazina/cetamina-s/midazolam em felinos domésticos (Felis domestica

    Directory of Open Access Journals (Sweden)

    Marco César Batista de Morais

    2005-04-01

    Full Text Available Com o objetivo de avaliar as associações anestésicas atropina/cetamina-s/xilazina e acepromazina/cetamina-s/midazolam em felinos domésticos (Felis catus, foram utilizados 16 felinos, machos, hígidos cedidos por proprietários atendidos no Hospital Veterinário da Escola Superior de Agricultura de Mossoró. Os animais foram distribuídos aleatoriamente em dois grupos de oito animais, onde foi utilizado um tratamento anestésico distinto para cada grupo. O grupo I, foi pré-tratado com sulfato de atropina (0,044mg/kg por via subcutânea, e decorridos 15 minutos, recebeu xilazina (1,0 mg/kg associada a cetamina-s (10mg/kg por via intramuscular. No grupo II, foi utilizada acepromazina (0,2 mg/kg por via intramuscular e após 15 minutos, administrou-se a associação de midazolam (0,5mg/kg e cetamina-s (10 mg/kg por via intramuscular. Foram avaliadas as variáveis fisiológicas: freqüência cardíaca, freqüência respiratória, saturação de oxigênio e tempo de preenchimento capilar. A aferição das variáveis foi realizada a cada 10 minutos, durante 90 minutos. Também foi avaliado o período de latência, período de analgesia e de recuperação. A média do período de latência após a administração de atropina/cetamina-s/xilazina foi de 3,68min, enquanto na acepromazina/cetamina-s/midazolam foi de 3,95 min. No grupo I, a média do tempo de analgesia foi de 45,94min, e no grupo II foi obtida analgesia em apenas um animal. A média do tempo de recuperação no grupo I foi de 134, 08min e no grupo II, 78,28min. Concluiu-se que a associação atropina/cetamina-s/xilazina, produz uma anestesia de boa qualidade para pequenos procedimentos cirúrgicos, enquanto que a associação acepromazina/cetamina-s/midazolam deve ser utilizada para pequenos procedimentos ambulatoriais. Ambas associações apresentam propriedades farmacológicas comparáveis com as obtidas com a cetamina racêmica.

  13. Sampling sites for detection of feline herpesvirus-1, feline calicivirus and Chlamydia felis in cats with feline upper respiratory tract disease.

    Science.gov (United States)

    Schulz, Catharina; Hartmann, Katrin; Mueller, Ralf S; Helps, Chris; Schulz, Bianka S

    2015-12-01

    Feline herpesvirus-1 (FHV-1), feline calicivirus (FCV) and Chlamydia felis are involved in feline upper respiratory tract disease (FURTD). Clinical signs caused by these agents can overlap, and the involvement of certain pathogens is often unpredictable. The objectives of this study were to compare detection rates of FHV-1, FCV and C felis at different sampling sites, and to investigate the correlation between positive test results and clinical signs in cats with FURTD. Swabs were taken from the nose, pharynx, tongue and conjunctiva of 104 cats with signs of FURTD. Real-time PCR was performed on all samples for the detection of FHV-1, FCV and C felis. Infectious agents were identified in 93 (89.4%) cats. Of these, 55.8% were positive for FHV-1, 50.0% for FCV and 35.6% for C felis. FCV was found more frequently in the oropharynx (92.3% of FCV-positive cats) and on the tongue (90.4%) than the conjunctiva (38.5%) (P cats, 96.2% of FCV-positive cats and 81.1% of C felis-positive cats would have been detected. The oropharynx can be recommended as the preferred single sampling site for the detection of FCV, FHV-1 and C felis if only one sample can be taken; however, taking samples at different sites significantly increases the detection rate for all pathogens studied. Interestingly, sampling from a site with FURTD-associated lesions did not increase the likelihood of detecting the infectious agents. © ISFM and AAFP 2015.

  14. Fluralaner, a novel isoxazoline, prevents flea (Ctenocephalides felis) reproduction in vitro and in a simulated home environment

    OpenAIRE

    Williams, Heike; Young, David R.; Qureshi, Tariq; Zoller, Hartmut; Anja R. HECKEROTH

    2014-01-01

    Background Fluralaner, a novel isoxazoline, has both acaricidal and insecticidal activity through potent blockage of GABA- and L-glutamate-gated chloride channels. This study investigated the in vitro and in vivo effects of fluralaner exposure on flea (Ctenocephalides felis) reproduction. Methods Blood spiked with sub-insecticidal fluralaner concentrations (between 0.09 and 50.0 ng/mL) was fed to fleas for 10 days using a membrane system. Cessation of reproduction in exposed fleas was assesse...

  15. Caracal depereti nov. Sp. Y felis aff. Silvestris (felidae, mammalia del plioceno inferior de layna (Soria, España

    Directory of Open Access Journals (Sweden)

    Salesa, M. J.

    2003-08-01

    Full Text Available Two species of small-medium size felids, Felis aff. silvestris and Caracal depereti nov. sp., have been identified from the Pliocene karstic locality of Layna (Soria, Spain. Caracal depereti nov. sp. shows close affinities with Caracal issiodorensis, species that has been traditionally classified in the genus Lynx. This new interpretation implies that there are no evidences of lynxes in the Pliocene of Westem Europe, and probably this consideration can be applicable to other Eurasiatic localities where Lynx issiodorensis has been determined.Dos especies de félidos de talla pequeña a media, Felis aff. silvestris y Caracal depereti nov. sp., han sido identificadas en el yacimiento cárstico plioceno de Layna, Soria. Caracal depereti nov. sp. muestra estrechas afinidades con Caracal issiodorensis, especie que tradicionalmente ha sido clasificada en el género Lynx. Esta interpretación implica que no hay evidencias de linces en el Plioceno de Europa occidental, y probablemente esta consideración pueda aplicarse a otros yacimientos pliocenos de Eurasia, en los que se ha determinado Lynx issiodorensis.

  16. Assessment of the onset of action of afoxolaner against existing adult flea (Ctenocephalides felis) infestations on dogs.

    Science.gov (United States)

    Kunkle, Bruce N; Drag, Marlene D; Chester, Theodore S; Larsen, Diane L

    2014-04-02

    The speed of kill of afoxolaner against experimental infestations by Ctenocephalides felis was evaluated after oral administration of afoxolaner in a soft chew (NEXGARD(®)) at a dose to achieve 2.5mg/kg bodyweight. Forty beagles were allocated to two treatment groups. Dogs in Treatment Group 1 were untreated controls. Dogs in Treatment Group 2 were treated on Day-0 with afoxolaner, according to their pre-treatment bodyweight. All dogs were infested with approximately 100 C. felis on Day-1. Live fleas were counted upon removal at 5 time points after treatment (i.e., 2, 4, 8, 12 and 24h after treatment). For each time point, counts were performed on 4 dogs from each of the treated and the untreated groups. Early curative flea killing efficacy was evaluated with respect to the untreated control group. The afoxolaner treated group had significantly fewer fleas than the untreated control group at 8, 12, and 24h (p99.5% efficacy at 8, 12, and 24h after treatment demonstrating an early onset of action. Copyright © 2014 The Authors. Published by Elsevier B.V. All rights reserved.

  17. Onset of activity of fluralaner (BRAVECTO™) against Ctenocephalides felis on dogs.

    Science.gov (United States)

    Taenzler, Janina; Wengenmayer, Christina; Williams, Heike; Fourie, Josephus; Zschiesche, Eva; Roepke, Rainer K A; Heckeroth, Anja R

    2014-12-04

    Fluralaner (Bravecto™) is a novel systemic insecticide and acaricide that provides long persistent antiparasitic activity following a single administration at the minimum dose of 25 mg/kg body weight. Three negative controlled, randomized studies were conducted in dogs to evaluate the start to kill (1 study) and the speed of flea kill (2 studies) of fluralaner. All dogs were infested prior to treatment with unfed adult C. felis fleas. Dogs in the treated groups were administered once orally with fluralaner at a minimum dose of 25 mg/kg body weight, while dogs in the control groups were not treated. Separate control and treatment groups were paired at each time point of flea assessment. Flea counts were performed by combing dogs at either 0.5, 1, 2, or 4 hours after fluralaner treatment to measure the start to kill. To evaluate the speed of flea kill over 12 weeks, flea counts were performed by combing dogs at either 4, 8, 12, or 24 hours after fluralaner treatment and then at 4, 8, 12, or 24 hours after each flea re-infestations performed at 4, 8, and 12 weeks following treatment. In the start to kill study, the fluralaner activity against fleas started already at 1 hour post-treatment (8% numerical efficacy). At 2 and 4 hours post-treatment, the flea reduction was significant with 36.7% and 88% efficacy, respectively. In the speed of kill studies, the efficacy against fleas after fluralaner treatment was 80.5% at 4 hours and remained ≥ 99.4% at 8, 12 and 24 hours. After flea re-infestations in weeks 4, 8 and 12, the efficacy at 4 hours was 96.8, 91.4, and 33.5%, respectively. Efficacy at 8, 12 and 24 hours after flea re-infestations was 98.0-100% for the 12 weeks of the study. Except for 4 hours after the 12-week flea re-infestation, flea reduction was significant for all time points after flea re-infestation. Single oral fluralaner administration rapidly eliminates existing flea infestations and provides excellent protection against fleas

  18. Aspectos morfométricos do timo em gatos domésticos (Felis domesticus

    Directory of Open Access Journals (Sweden)

    Camila E. Barroso

    2012-12-01

    Full Text Available O timo é um órgão linfático primário que desenvolve sua atividade em organismos jovens. Apesar de sua função ser responsável por mecanismos fundamentais na aquisição das defesas e conseqüentes respostas orgânicas, ela ainda não está totalmente esclarecida, nem tampouco as bases morfológicas que respondem por tais funções, como o processo de desenvolvimento e involução do órgão. Objetivou-se analisar e caracterizar os aspectos morfológicos do timo, tais como seu tamanho e volume, e aspectos histológicos do timo em gatos, correlacionando o sexo e o desenvolvimento etário. Doze timos provenientes de fetos de gatos domésticos (Felis domesticus sem raça definida (SRD, machos e fêmeas, separados em três grupos etários. O timo apresentou-se com uma coloração rosa-pálida e com duas porções, a torácica e a cervical, sendo que cada uma delas possuía um lobo direito e um lobo esquerdo em sua maioria. A porção torácica localizava-se em região de mediastino cranial, entre os pulmões e à base do coração. E a porção cervical estendia-se além das costelas em sentido cranial, estando localizada ventralmente à traqueia. A estrutura celular do timo demonstrou-se organizada com a presença de agregados concêntricos, os chamados corpúsculos tímicos, formados por células epiteliais, sustentada por uma cápsula de tecido conjuntivo de onde partiam septos que ao penetrar no órgão dividia-o em lóbulos. Ocorreram variações significativas quanto à lobação e as dimensões do timo entre indivíduos da mesma faixa etária, e entre sexos diferentes. Os valores relativos ao comprimento, espessura e largura, de maneira geral, apresentaram aumento, em conformidade ao desenvolvimento dos animais, mas com diferenças entre os sexos.

  19. Magni Reproducibility Example

    DEFF Research Database (Denmark)

    2016-01-01

    An example of how to use the magni.reproducibility package for storing metadata along with results from a computational experiment. The example is based on simulating the Mandelbrot set.......An example of how to use the magni.reproducibility package for storing metadata along with results from a computational experiment. The example is based on simulating the Mandelbrot set....

  20. Tõsõ mu maailman : [luuletused] / Häniläne, pseud.

    Index Scriptorium Estoniae

    Häniläne,, pseud.

    2008-01-01

    Sisu: Bombus lucorum (maakimalane) ; Podiceps auritus (sarvikpütt) ; Malus domestica (aed-õunapuu) ; Felis catus domesticus (kodukass) ; Inachis io (päevapaabusilm) ; Lacerta vivipara (arusisalik) ; Canis familiaris (kodukoer) ; Clangula hyemalis (aul)

  1. How does a carnivore guild utilise a substantial but unpredictable anthropogenic food source? Scavenging on hunter-shot ungulate carcasses by wild dogs/dingoes, red foxes and feral cats in south-eastern Australia revealed by camera traps

    National Research Council Canada - National Science Library

    Forsyth, David M; Woodford, Luke; Moloney, Paul D; Hampton, Jordan O; Woolnough, Andrew P; Tucker, Mark

    2014-01-01

    .... We investigated how wild dogs/dingoes and their hybrids (Canis lupus familiaris/dingo), red foxes (Vulpes vulpes) and feral cats (Felis catus) utilised sambar deer carcasses during the peak hunting seasons...

  2. How Does a Carnivore Guild Utilise a Substantial but Unpredictable Anthropogenic Food Source? Scavenging on Hunter-Shot Ungulate Carcasses by Wild Dogs/Dingoes, Red Foxes and Feral Cats in South-Eastern Australia Revealed by Camera Traps: e97937

    National Research Council Canada - National Science Library

    David M Forsyth; Luke Woodford; Paul D Moloney; Jordan O Hampton; Andrew P Woolnough; Mark Tucker

    2014-01-01

    .... We investigated how wild dogs/dingoes and their hybrids (Canis lupus familiaris/dingo), red foxes (Vulpes vulpes) and feral cats (Felis catus) utilised sambar deer carcasses during the peak hunting seasons...

  3. Environmental Aspects of Domestic Cat Care and Management: Implications for Cat Welfare

    National Research Council Canada - National Science Library

    Judith L. Stella; Candace C. Croney

    2016-01-01

      Domestic cats (Felis silvestris catus) are the most commonly kept companion animals in the US with large populations of owned (86 million), free-roaming (70 million), research (13,000), and shelter (2-3 million) cats...

  4. Correlação entre sinais clínicos da conjuntivite felina e a detecção molecular de felid herpesvirus-1, feline calicivirus, chlamydophila felis e mycoplasma felis em gatos de abrigos no Rio de Janeiro

    Directory of Open Access Journals (Sweden)

    Natasha Baumworcel

    2017-05-01

    Full Text Available O objetivo deste estudo foi realizar diagnóstico molecular de agentes microbiológicos (FHV-1, FCV, Mycoplasma felis e Chlamydophila felis em gatos filhotes e associar a presença dos patógenos à gravidade dos sinais clínicos de conjuntivite. Foram coletadas um total de 108 amostras de suabe conjuntival de filhotes felinos assintomáticos (G1; n = 40 e sintomáticos (G2; n = 68. Animais do G2 foram categorizados de 1 (leve até 4 (grave, de acordo com o quadro clínico de conjuntivite. As 108 amostras foram submetidas à PCR e RT-PCR. O FHV-1 foi detectado em 57,4% das amostras, o FCV em 37%, o M. felis em 10,2% e o C. felis em 24,1%. Coinfecções, por sua vez, foram detectadas em 36,1%. No G1, 70% das amostras foram positivas para um ou mais patógenos. No G2, 85,3% apresentavam infecções (P = 0,03. No G1, monoinfecções por FHV-1 foram diagnosticadas em 52,5% das amostras, por FCV em 5%, por C. felis em 2,5%, e em 30% das amostras analisadas nenhum dos patógenos estudados foi encontrado. Coinfecções, por sua vez, estavam presentes em 72,5% das amostras. No G2, monoinfecções por FHV-1 foram encontradas em 45,6% das amostras, por FCV em 14,7 %, por M. felis em 3% e por C. felis também em 3%. Nenhum dos patógenos estudados foi encontrado em 14,7% das amostras analisadas. Coinfecções, responsáveis por 52% dos casos, foram categorizados como Grau 1 (29,4%, Grau 2 (20,6%, Grau 3 (30,9% e Grau 4 (19,1%. A presença de FHV-1 e FCV está igualmente distribuída entre as quatro categorias. Os sinais clínicos mais graves (graus 3 e 4 estão relacionados a coinfecções por C. felis e M. felis. Os agentes microbiológicos FHV-1, FCV, C. felis e M. felis foram encontrados em animais com conjuntivite. Coinfecções estão relacionadas aos casos mais graves. Por fim, concluiu-se que o diagnóstico molecular, além de detectar portadores assintomáticos, é um método rápido e acurado para o diagnóstico do patógeno causador da

  5. Further studies on Toxascaris leonina (Linstow, 1902) (Ascaridida: Ascarididae) from Felis lynx (Linnaeus) and Panthera leo (Linnaeus) (Carnivora: Felidae).

    Science.gov (United States)

    Xue, Li-Mei; Chai, Jing-Bo; Guo, Yan-Ning; Zhang, Lu-Ping; Li, Liang

    2014-03-01

    Toxascaris leonina (Linstow, 1902) is a most common intestinal parasite of various animals in Felidae and Canidae. In the present paper, light and scanning electron microscopy (SEM) were used to study the morphological aspects of adult worms of this nematode in detail, based on the material collected from Panthera leo (Linnaeus) and Felis lynx (Linnaeus) (Carnivora: Felidae) in China. The results showed that there were some morphometric differences between the present material and the previous studies, including the body size, the width and length of cervical alae, the number of denticles on each lip and the tail length of the female. Previously unreported morphological features were also revealed. These supplementary morphological and morphometric data contributed to a more accurate identification of this worldwide distributed ascarid nematode.

  6. Prevalence of Zoonotic and Other Intestinal Protozoan Parasites in Stray Cats (Felis domesticus of Kerman, South-East of Iran

    Directory of Open Access Journals (Sweden)

    Sakineh BEIGI

    2017-01-01

    Full Text Available Intestinal protozoan parasites constitute a major source of diseases for stray cats and have been recognized as important public health problems in several parts of the world. Considering the potential risk of stray cats for public health, present cross-sectional study was carried out to determine the type and frequency of protozoan parasites by faecal examination. A total of 100 stray cats were examined in Kerman city, Iran, Overall 67 cats (67% were infected with at least one protozoan parasite. The following parasites, with their respective prevalence, were found; Isospora felis 38%, Isospora rivolta 25%, Toxoplasma gondii 16%, Sarcocystis spp. 8%, Cryptosporidium spp. 7%, and Giardia sp. 5%. Based on our data, the sex of stray cats was not significantly associated with the prevalence of gastrointestinal protozoan parasites. The high infection rate of zoonotic intestinal protozoan parasites in stray cats is considered to be critical from the viewpoint of public health importance.We

  7. Fluralaner, a novel isoxazoline, prevents flea (Ctenocephalides felis) reproduction in vitro and in a simulated home environment.

    Science.gov (United States)

    Williams, Heike; Young, David R; Qureshi, Tariq; Zoller, Hartmut; Heckeroth, Anja R

    2014-06-19

    Fluralaner, a novel isoxazoline, has both acaricidal and insecticidal activity through potent blockage of GABA- and L-glutamate-gated chloride channels. This study investigated the in vitro and in vivo effects of fluralaner exposure on flea (Ctenocephalides felis) reproduction. Blood spiked with sub-insecticidal fluralaner concentrations (between 0.09 and 50.0 ng/mL) was fed to fleas for 10 days using a membrane system. Cessation of reproduction in exposed fleas was assessed using flea survival, egg hatchability, and control of oviposition, pupae, and flea emergence. Fluralaner efficacy for in vivo Ctenocephalides (C.) felis control on dogs was assessed using a simulated flea-infested home environment. During a pre-treatment period, dogs were infested twice on days -28 and -21 with 100 adult unfed fleas to establish a thriving population by day 0 of the study. On day 0, one group of dogs was treated with fluralaner (Bravecto™; n=10), while another group served as negative control (n=10). Following treatment, dogs were infested three times with 50 fleas on days 22, 50 and 78 to simulate new infestations. Live flea counts were conducted weekly on all dogs for 12 weeks starting 1 day before treatment. Fluralaner potently inhibited flea reproduction capacity in vitro. Oviposition ceased completely at concentrations as low as 25.0 ng/mL. While no ovicidal effect was observed, fluralaner exerted a larvicidal effect at exceptionally low concentrations (6.25 ng/mL). In the simulated flea-infested home environment, flea-control efficacy on fluralaner-treated dogs was >99% at every time point measured for 12 weeks. No adverse events were observed in fluralaner-treated dogs. Fluralaner completely controls egg laying, larval development and flea reproduction even at sub-insecticidal concentrations. Oral treatment of dogs with fluralaner is highly effective for eliminating fleas in a simulated flea-infested home environment.

  8. Preventive efficacy of NexGard Spectra? against Dipylidium caninum infection in dogs using a natural flea (Ctenocephalides felis) infestation model

    OpenAIRE

    Beugnet Frédéric; Meyer Leon; Fourie Josephus; Larsen Diane

    2017-01-01

    The efficacy of a monthly oral endectocide product, NexGard Spectra® (Merial), a combination of afoxolaner and milbemycin oxime, was evaluated in a flea (Ctenocephalides felis) challenge model for the prevention of Dipylidium caninum tapeworm infection in dogs. The efficacy of treatment with NexGard Spectra® was assessed in 10 dogs following weekly flea infestation with metacestode naturally infected fleas and compared with that in 10 untreated control dogs. The 100 fleas deposited weekly on ...

  9. Efficacy of emodepside/toltrazuril suspension (Procox® oral suspension for dogs) against mixed experimental Isospora felis/Isospora rivolta infection in cats.

    Science.gov (United States)

    Petry, Gabriele; Kruedewagen, Eva; Kampkoetter, Andreas; Krieger, Klemens

    2011-08-01

    The coccidia Isospora felis and Isospora rivolta are intestinal parasites occurring worldwide in domestic cats. In young cats, they can be detected with higher prevalence.The effects of toltrazuril in the new combination product Procox(®) oral suspension for dogs containing 0.1 % emodepside and 2 % toltrazuril (0.9 mg emodepside + 18 mg toltrazuril per ml) were studied in eighteen kittens experimentally infected each with a total of 1 x 10(5) oocysts of a mixture of Isospora felis and Isospora rivolta. In the infectious material, the quantitative relation of I. felis and I. rivolta was about 1:5. Following a three-days period after infection, two groups of 6 kittens were treated during the prepatent period with either a single dose of 0.45 mg emodepside + 9 mg toltrazuril/kg body weight or 0.9 mg emodepside + 18 mg toltrazuril/kg body weight. A group of six kittens without any treatment served as a control. On day 5 post infection, the untreated kittens started the excretion of oocysts. Treatment with both toltrazuril doses significantly reduced oocyst excretion. Following the single higher dose, the reduction of oocysts of both Isospora spp. was more pronounced (96.7 % to 100 %) in comparison to the lower dose (57.2 % to 100 %). The Procox(®) application was well tolerated and no adverse events were seen with any of the applied dosages.When administered to kittens and as a single treatment during the prepatent period, Procox(®) is suitable to control the number of oocysts excreted in the faeces in case of an Isospora felis and Isospora rivolta infection.

  10. Presence of Ctenocephalides canis (Curtis) and Ctenocephalides felis (Bouché) infesting dogs in the city of Aguascalientes, México.

    Science.gov (United States)

    Hernández-Valdivia, Emmanuel; Cruz-Vázquez, Carlos; Ortiz-Martínez, Raúl; Valdivia-Flores, Arturo; Quintero-Martínez, Ma Teresa

    2011-12-01

    Prevalence and seasonal distribution of Ctenocephalides canis (Curtis) and Ctenocephalides felis (Bouché) infestations in urban dogs of the city of Aguascalientes, Mexico, were studied. Between January and December 2007, 863 dogs in the Municipal Canine and Feline Control Center were examined. Overall prevalence of infestation was 12% (95% CI 10-14). Seasonal distribution revealed that prevalences in spring and summer were highest, while autumn and winter had lower prevalences. Two infestation peaks were observed, i.e., in April (17.7%) and July (18.9%). A positive correlation was detected between prevalence and temperature during the winter season (P < 0.05). Prevalence in relation to gender showed that males were more frequently infested, 14% (95% CI 11-17), than females, 9.4% (95% CI 7-13); hair length did not affect differences in prevalence. Six hundred twenty-nine fleas were examined; 62% were C. canis and 38% C. felis . Dogs infested with only C. canis were 48% (95% CI 38-58), while 18% were infested only with C. felis (95% CI 11-27); the remainder, 34% (95% CI 24-44), had mixed infestations.

  11. Rickettsia typhi IN RODENTS AND R. felis IN FLEAS IN YUCATÁN AS A POSSIBLE CAUSAL AGENT OF UNDEFINED FEBRILE CASES

    Directory of Open Access Journals (Sweden)

    Gaspar PENICHE-LARA

    2015-04-01

    Full Text Available Rickettsia typhi is the causal agent of murine typhus; a worldwide zoonotic and vector-borne infectious disease, commonly associated with the presence of domestic and wild rodents. Human cases of murine typhus in the state of Yucatán are frequent. However, there is no evidence of the presence of Rickettsia typhi in mammals or vectors in Yucatán. The presence of Rickettsia in rodents and their ectoparasites was evaluated in a small municipality of Yucatán using the conventional polymerase chain reaction technique and sequencing. The study only identified the presence of Rickettsia typhi in blood samples obtained from Rattus rattus and it reported, for the first time, the presence of R. felis in the flea Polygenis odiosus collected from Ototylomys phyllotis rodent. Additionally, Rickettsia felis was detected in the ectoparasite Ctenocephalides felis fleas parasitizing the wild rodent Peromyscus yucatanicus. This study’s results contributed to a better knowledge of Rickettsia epidemiology in Yucatán.

  12. The efficacy of a topically applied combination of cyphenothrin and pyriproxyfen against the southern African yellow dog tick, Haemaphysalis elliptica, and the cat flea, Ctenocephalides felis, on dogs

    Directory of Open Access Journals (Sweden)

    J. J. Fourie

    2010-05-01

    Full Text Available The objective of this study was to determine the therapeutic and residual efficacy of a topically applied combination of cyphenothrin (40 % and pyriproxyfen (2 % against the tick Haemaphysalis elliptica and the flea Ctenocephalides felis on dogs. Twelve dogs were infested with 50 ticks 2 days before they were treated and with approximately 100 fleas 6 days before treatment and again 2 days before treatment and with 50 ticks and approximately 100 fleas at weekly intervals thereafter. They were ranked according to their flea counts and sex 5 days before treatment and randomly allocated to an untreated control group of 6 dogs and a treated group of 6 dogs. Ticks and fleas were collected from the dogs 48 h after treatment and 48 h after each infestation and live and dead ticks and live fleas were counted. The counts of ticks and fleas were transformed to geometric means, and efficacy was calculated by comparing these means. The product had a therapeutic efficacy of 83.1 % against H. elliptica and 97.5 % against C. felis 2 days after treatment. The residual period of protection during which efficacy was ≥ 90 % was 5 weeks for both H. elliptica and C. felis.

  13. The sustained speed of kill of ticks (Rhipicephalus sanguineus) and fleas (Ctenocephalides felis felis) on dogs by a spot-on combination of fipronil and permethrin (Effitix®) compared with oral afoxolaner (NexGard®).

    Science.gov (United States)

    Cvejić, Dejan; Schneider, Claudia; Neethling, Willem; Hellmann, Klaus; Liebenberg, Julian; Navarro, Christelle

    2017-08-30

    The rapid speed of kill of a spot-on, combination of fipronil-permethrin (Effitix ® , Virbac) was shown against infestations of Rhipicephalus sanguineus and Ctenocephalides felis on dogs. Efficacy was determined against new infestations at weekly intervals for one month after treatment. Dogs were allocated randomly to either an untreated control or to a single administration, given on Day 0, of either topical fipronil-permethrin (6.7-13.4mg/kg and 60-120mg/kg, respectively) or oral afoxolaner (2.72-6.8mg/kg), based on pre-treatment, host-suitability flea counts. Dogs were infested with 50, unfed, adult R. sanguineus on Days 7, 14, 21 and 28, and with 100C. felis on Days 8, 15, 22 and 29. Tick counts were performed 0.5, 2, 6, 12 and 24h, and flea counts were performed 0.5 and 24h after each infestation. No treatment-related adverse reactions occurred. Dogs in the untreated group maintained viable infestations throughout the study. Following infestation, live tick and flea counts for dogs treated with fipronil-permethrin compared with untreated dogs were rapidly and significantly reduced with efficacy apparent at 0.5h after infestation. Flea efficacies (arithmetic mean counts) at 0.5h after infestation on Day 7 (Day 28) were significantly greater for fipronil-permethrin, 70% (34%) compared with 8% (18%) for afoxolaner (P≤0.05). Tick efficacies at 2h on Day 7 (Day 28) were 74% (63%) for fipronil-permethrin compared with 10% (0%) for afoxolaner (P≤0.05). Efficacies for tick repellency as indicated by counts of ticks off the dogs at 2h on Day 7 (Day 28) were greater for fipronil-permethrin, 32% (22%) compared with afoxolaner, 0% (0%) (P≤0.05). Anti-attachment efficacies at 12h were greater for fipronil-permethrin compared with afoxolaner. Tick efficacies at 24h, based on arithmetic (geometric) means, were significantly greater on Day 28 for fipronil-permethrin compared with afoxolaner (P≤0.05), 74% (87%) and 45% (60%), respectively, and were similar (P >0

  14. Comparative speed of efficacy against Ctenocephalides felis of two oral treatments for dogs containing either afoxolaner or fluralaner.

    Science.gov (United States)

    Beugnet, Frederic; Liebenberg, Julian; Halos, Lenaïg

    2015-01-30

    A study was designed to compare the efficacy of NexGard(®) and Bravecto™, 2 recently introduced oral ectoparasiticides containing isoxazolines, against fleas (Ctenocephalides felis) on dogs. Twenty-four healthy dogs, weighing 9.2 kg to 28.6 kg, were included in this parallel group design, randomized, and controlled efficacy study. On Day -1, the 24 dogs were allocated to 3 study groups: untreated control; Nexgard(®) treated and Bravecto™ treated. The treatments were administered on Days 0, 28 and 56 for Nexgard(®) (labelled for monthly administration), and once on Day 0 for Bravecto™ (labelled for a 12 week use). Flea infestations were performed weekly with 100 adult unfed C. felis on each dog from Days 42 to 84. Fleas were counted and re-applied at 6 and 12 h post-infestation and removed and counted 24 h post-infestation. The arithmetic mean flea count for the untreated group ranged from 62.9 to 77.6 at 24 h post-infestation, indicating vigorous flea challenges on all assessment days. Both the Nexgard(®) and Bravecto™ treated groups had statistically significantly (p<0.05) less fleas compared to the untreated group on all assessment time points and days. Significantly fewer fleas were recorded for NexGard(®) treated dogs compared to Bravecto™ treated dogs at 6 h post-infestation on Day 56, 63, 70, 77 and 84 and at 12 h post-infestation on Days 70 and 84. No statistically significant (p<0.05) differences were recorded between the treated groups at 24 h post-infestation. Efficacies recorded 6 h post-infestation for Nexgard(®) ranged from 62.8% (Day 49) to 97.3% (Day 56), and efficacies ranged from 94.1% (Day 49) to 100% (Days 42, 56, 70 and 84) at 12 h post-infestation. Efficacies recorded for Bravecto™ ranged from 45.1% (Day 84) to 97.8% (Day 42) at 6 h post-infestation, and from 64.7% (Day 84) to 100% (Days 42 and 56) at 12 h post-infestation. Efficacies observed at 24 h were 100% for both products during the study except 99.6% on Day 84 for

  15. Influence de la température sur le développement de la puce africaine du chat Ctenocephalides felis strongylus (Jordan, 1925 (Siphonaptera : Pulicidae

    Directory of Open Access Journals (Sweden)

    Yao K.P.

    2010-06-01

    Full Text Available Ctenocephalides felis (Bouché, 1835 communément appelée “puce du chat” présente deux sous-espèces reconnues : Ctenocephalides felis strongylus (Jordan, 1925 inféodée au continent africain et Ctenocephalides felis felis (Bouché, 1835 présente dans les zones à climat tempéré (Afrique du Nord, Europe et Amérique (Ménier et Beaucournu, 1999. En Afrique subsaharienne, la principale puce retrouvée chez les animaux de compagnie et chez certains animaux d’élevage (ovins, caprins et bovins appartient à la sous-espèce C. f. strongylus. Quelques paramètres bio-écologiques de C. f. strongylus ont été étudiés dans différentes conditions d’élevage. Les résultats ont été comparés à ceux de C. f. felis actuellement disponibles. À 75% ± 5 d’humidité relative, le cycle de développement de C. f. strongylus dure 20-21 jours à 27 °C et de 16 à 17 jours à 29 °C. Ainsi, la sousespèce africaine de la puce du chat (C. f. strongylus se développe moins vite que C. f. felis à températures identiques. Cette différence pourrait s’expliquer par l’influence du climat de leurs aires de distribution respectives sur leur cycle de développement. À 75% ± 5 d’humidité relative, les adultes de C. f. strongylus ne peuvent survivre plus de 14 jours dans l’environnement à des températures comprises entre 27 et 29 °C, lorsqu’elles n’ont jamais pris de repas sanguin. Dans ces mêmes conditions, la durée de survie n’excède pas 16 jours à 19 °C. Mais lorsque C. f. strongylus a pris un premier repas de sang, elle a une durée de vie beaucoup plus courte lorsqu’elle est hors de son hôte. En effet, aucun individu n’est retrouvé vivant trois jours passé hors de la fourrure de son hôte à 29 °C, cinq jours à 27 °C et huit jours à 19 °C. Il en est de même pour C. f. felis. Ces données sur la bio-écologie de C. f. strongylus permettent de comprendre l’influence de la température sur son cycle de d

  16. Regression analysis by example

    CERN Document Server

    Chatterjee, Samprit

    2012-01-01

    Praise for the Fourth Edition: ""This book is . . . an excellent source of examples for regression analysis. It has been and still is readily readable and understandable."" -Journal of the American Statistical Association Regression analysis is a conceptually simple method for investigating relationships among variables. Carrying out a successful application of regression analysis, however, requires a balance of theoretical results, empirical rules, and subjective judgment. Regression Analysis by Example, Fifth Edition has been expanded

  17. Control of immature stages of the flea Ctenocephalides felis(Bouché in carpets exposed to cats treated with imidacloprid

    Directory of Open Access Journals (Sweden)

    L.J. Fourie

    2000-07-01

    Full Text Available Fleas cause allergic dermatitis in cats and dogs and therefore warrant control. It has been demonstrated previously that there is marked inhibition of the development of the immature stages of the cat flea Ctenocephalides felis on fleece blankets exposed to cats treated with imidacloprid. This study reports on the efficacy of imidacloprid in suppressing adult flea emergence in carpet exposed to treated cats. Circular discs of carpet pre-seeded with flea eggs and larvae were exposed to 6 untreated control and 6 topically treated (imidacloprid 10 % m/v cats 1 to 2 days after treatment and subsequently fortnightly for 6 weeks. Exposure times on alternate days were either 1 or 6 hours. Adult flea yield from carpets was determined 35 days after exposure. Differences between flea yield on control carpets and those exposed for 1 hour were significant only for days +1 and +14. For the 6-hour exposure, differences were significant at all times except on Day +43. The ability of imidacloprid to suppress the yield of adult fleas on carpets (6-hour exposure steadily declined from 82 % (Day +2 to 12 %(Day +43. For the 1-hour exposure it varied inconsistently between 0 and 83 % over the 6-week study period.

  18. Early-Onset Progressive Retinal Atrophy Associated with an IQCB1 Variant in African Black-Footed Cats (Felis nigripes).

    Science.gov (United States)

    Oh, Annie; Pearce, Jacqueline W; Gandolfi, Barbara; Creighton, Erica K; Suedmeyer, William K; Selig, Michael; Bosiack, Ann P; Castaner, Leilani J; Whiting, Rebecca E H; Belknap, Ellen B; Lyons, Leslie A

    2017-03-21

    African black-footed cats (Felis nigripes) are endangered wild felids. One male and full-sibling female African black-footed cat developed vision deficits and mydriasis as early as 3 months of age. The diagnosis of early-onset progressive retinal atrophy (PRA) was supported by reduced direct and consensual pupillary light reflexes, phenotypic presence of retinal degeneration, and a non-recordable electroretinogram with negligible amplitudes in both eyes. Whole genome sequencing, conducted on two unaffected parents and one affected offspring was compared to a variant database from 51 domestic cats and a Pallas cat, revealed 50 candidate variants that segregated concordantly with the PRA phenotype. Testing in additional affected cats confirmed that cats homozygous for a 2 base pair (bp) deletion within IQ calmodulin-binding motif-containing protein-1 (IQCB1), the gene that encodes for nephrocystin-5 (NPHP5), had vision loss. The variant segregated concordantly in other related individuals within the pedigree supporting the identification of a recessively inherited early-onset feline PRA. Analysis of the black-footed cat studbook suggests additional captive cats are at risk. Genetic testing for IQCB1 and avoidance of matings between carriers should be added to the species survival plan for captive management.

  19. Code query by example

    Science.gov (United States)

    Vaucouleur, Sebastien

    2011-02-01

    We introduce code query by example for customisation of evolvable software products in general and of enterprise resource planning systems (ERPs) in particular. The concept is based on an initial empirical study on practices around ERP systems. We motivate our design choices based on those empirical results, and we show how the proposed solution helps with respect to the infamous upgrade problem: the conflict between the need for customisation and the need for upgrade of ERP systems. We further show how code query by example can be used as a form of lightweight static analysis, to detect automatically potential defects in large software products. Code query by example as a form of lightweight static analysis is particularly interesting in the context of ERP systems: it is often the case that programmers working in this field are not computer science specialists but more of domain experts. Hence, they require a simple language to express custom rules.

  20. Multidimensional effects of biologically synthesized silver nanoparticles in Helicobacter pylori, Helicobacter felis, and human lung (L132) and lung carcinoma A549 cells

    Science.gov (United States)

    Gurunathan, Sangiliyandi; Jeong, Jae-Kyo; Han, Jae Woong; Zhang, Xi-Feng; Park, Jung Hyun; Kim, Jin-Hoi

    2015-02-01

    Silver nanoparticles (AgNPs) are prominent group of nanomaterials and are recognized for their diverse applications in various health sectors. This study aimed to synthesize the AgNPs using the leaf extract of Artemisia princeps as a bio-reductant. Furthermore, we evaluated the multidimensional effect of the biologically synthesized AgNPs in Helicobacter pylori, Helicobacter felis, and human lung (L132) and lung carcinoma (A549) cells. UV-visible (UV-vis) spectroscopy confirmed the synthesis of AgNPs. X-ray diffraction (XRD) indicated that the AgNPs are specifically indexed to a crystal structure. The results from Fourier transform infrared spectroscopy (FTIR) indicate that biomolecules are involved in the synthesis and stabilization of AgNPs. Dynamic light scattering (DLS) studies showed the average size distribution of the particle between 10 and 40 nm, and transmission electron microscopy (TEM) confirmed that the AgNPs were significantly well separated and spherical with an average size of 20 nm. AgNPs caused dose-dependent decrease in cell viability and biofilm formation and increase in reactive oxygen species (ROS) generation and DNA fragmentation in H. pylori and H. felis. Furthermore, AgNPs induced mitochondrial-mediated apoptosis in A549 cells; conversely, AgNPs had no significant effects on L132 cells. The results from this study suggest that AgNPs could cause cell-specific apoptosis in mammalian cells. Our findings demonstrate that this environmentally friendly method for the synthesis of AgNPs and that the prepared AgNPs have multidimensional effects such as anti-bacterial and anti-biofilm activity against H. pylori and H. felis and also cytotoxic effects against human cancer cells. This report describes comprehensively the effects of AgNPs on bacteria and mammalian cells. We believe that biologically synthesized AgNPs will open a new avenue towards various biotechnological and biomedical applications in the near future.

  1. Metales pesados en tejido muscular del bagre Ariopsis felis en el sur del golfo de México (2001-2004)

    OpenAIRE

    Vázquez, Felipe; Tomás R Florville-Alejandre; Herrera, Miguel; Díaz de León,Luz María

    2008-01-01

    Se analizó el contenido de metales pesados en tejido muscular del bagre, Ariopsis felis en el sur del golfo de México durante el período 2001-2004. La investigación fue efectuada buscando establecer un marco de referencia ambiental para este organismo. La concentración metálica siguió el orden: Hg < Co < Pb < Ni < V < Cr. Fue observado un decremento en contenido de cobalto y vanadio, incremento en contenido de níquel, mercurio y cromo, y ausencia de estos comportamientos para contenido de plo...

  2. Desenvolvimento embrionário tímico em fetos de gatos domésticos (Felis domesticus

    Directory of Open Access Journals (Sweden)

    Camila Ercolini Barroso

    2012-04-01

    Full Text Available http://dx.doi.org/10.5007/2175-7925.2012v25n3p239   Durante a vida fetal e no período neonatal o timo é um órgão de grande importância imunológica e, anatomicamente é o maior órgão linfático, com alta atividade linfopoiética, constando como precursor da linfopoiese. Estudos morfológicos sobre o desenvolvimento do timo são pouco esclarecedores e quando ocorrem englobam o assunto de forma genérica. Diante do exposto este estudo teve como objetivo caracterizar o desenvolvimento morfológico do timo de embriões e fetos de gatos domésticos (Felis domesticus, provenientes de gestação natural, utilizando as técnicas macroscópicas de dissecação e microscópica de luz. O timo dos gatos apresentou coloração rosa pálido e estava repousando na região do mediastino cranial, medialmente aos pulmões e dorsalmente à base do coração. Histologicamente apresentou duas regiões distintas, denominadas de cortical e de medular. Na região medular, foram evidenciadas células reticulares epiteliais com um núcleo grande e prolongamentos dendríticos. Os fetos apresentaram um desenvolvimento exponencial e mais acentuado a partir do 35º dia de gestação.

  3. Maple by example

    CERN Document Server

    Abell, Martha L

    2005-01-01

    Maple by Example, Third Edition, is a reference/text with CD for beginning and experienced students, professional engineers, and other Maple users. This new edition has been updated to be compatible with the most recent release of the Maple software. Coverage includes built-in Maple commands used in courses and practices that involve calculus, linear algebra, business mathematics, ordinary and partial differential equations, numerical methods, graphics and more. The CD-ROM provides updated Maple input and all text from the book.* Updated coverage of Maple features and functions * Backwards compatible for all versions* New applications from a variety of fields, including biology, physics and engineering* Expanded topics with many additional examples

  4. Neutrosophic Examples in Physics

    Directory of Open Access Journals (Sweden)

    Fu Yuhua

    2013-03-01

    Full Text Available Neutrosophy can be widely applied in physics and the like. For example, one of the reasons for 2011 Nobel Prize for physics is "for the discovery of the accelerating expansion of the universe through observations of distant supernovae", but according to neutrosophy, there exist seven or nine states of accelerating expansion and contraction and the neutrosophic state in the universe. Another two examples are "a revision to Gödel's incompleteness theorem by neutrosophy" and "six neutral (neutrosophic fundamental interactions". In addition, the "partial and temporary unified theory so far" is discussed (including "partial and temporary unified electromagnetic theory so far", "partial and temporary unified gravitational theory so far", "partial and temporary unified theory of four fundamental interactions so far", and "partial and temporary unified theory of natural science so far".

  5. Example based style classification

    DEFF Research Database (Denmark)

    Welnicka, Katarzyna; Bærentzen, Jakob Andreas; Aanæs, Henrik

    2011-01-01

    We address the problem of analysis of families of shapes which can be classified according to two categories: the main one corresponding usually to the coarse shape which we call the function and the more subtle one which we call the style. The style and the function both contribute to the overal...... this similarity should be reflected across different functions. We show the usability of our methods first on the example of a number of chess sets which our method helps sort. Next, we investigate the problem of finding a replacement for a missing tooth given a database of teeth....

  6. Procedure and Program Examples

    Science.gov (United States)

    Britz, Dieter

    Here some modules, procedures and whole programs are described, that may be useful to the reader, as they have been, to the author. They are all in Fortran 90/95 and start with a generally useful module, that will be used in most procedures and programs in the examples, and another module useful for programs using a Rosenbrock variant. The source texts (except for the two modules) are not reproduced here, but can be downloaded from the web site www.springerlink.com/openurl.asp?genre=issue &issn=1616-6361&volume=666 (the two lines form one contiguous URL!).

  7. Metales pesados en tejido muscular del bagre Ariopsis felis en el sur del golfo de México (2001-2004 Heavy metals in muscular tissue of the catfish, Ariopsis felis, in the southern Gulfof México (2001-2004

    Directory of Open Access Journals (Sweden)

    Felipe Vázquez

    2008-01-01

    Full Text Available Se analizó el contenido de metales pesados en tejido muscular del bagre, Ariopsis felis en el sur del golfo de México durante el período 2001-2004. La investigación fue efectuada buscando establecer un marco de referencia ambiental para este organismo. La concentración metálica siguió el orden: Hg We analyzed the heavy metal content in the muscular tissue of the catfish, Ariopsis felis, in the southern Gulf of México between 2001 and 2004. The research was done in order to establish an environmental frame of reference for this organism. The metal concentration was as follows: Hg < Co < Pb < Ni < V < Cr. Cobalt and vanadium contents were found to decrease and those of nickel, mercury, and chromium to ulerease; however, neither of these trends was observed for the lead content. One-way analyses of variance con-firm significant temporal variation only for cobalt, mercury, lead, and vanadium. Significant linear correlation coefficients (p ≤ 0.05 were found for Co-V, Cr-Ni, Cr-Pb, Co-Hg, Ni-V, and V-Pb. The first three associa-tions showed positive correlations, whereas the remaining ones had negative correlations. A factor analysis grouped the studied metals depending on their origins. The metal levels found in the muscular tissue of A. felis from the southern Gulf of México were lower than those set by national and international regulations.

  8. Detection of Hepatozoon felis in Ticks Collected from Free-Ranging Amur Tigers ( Panthera tigris altaica), Russian Far East, 2002-12.

    Science.gov (United States)

    Thomas, Lindsay H; Seryodkin, Ivan V; Goodrich, John M; Miquelle, Dale G; Birtles, Richard J; Lewis, John C M

    2016-07-01

    We collected 69 ticks from nine, free-ranging Amur tigers ( Panthera tigris altaica) between 2002 and 2011 and investigated them for tick-borne pathogens. DNA was extracted using alkaline digestion and PCR was performed to detect apicomplexan organisms. Partial 18S rDNA amplification products were obtained from 14 ticks from four tigers, of which 13 yielded unambiguous nucleotide sequence data. Comparative sequence analysis revealed all 13 partial 18S rDNA sequences were most similar to those belonging to strains of Hepatozoon felis (>564/572 base-pair identity, >99% sequence similarity). Although this tick-borne protozoon pathogen has been detected in wild felids from many parts of the world, this is the first record from the Russian Far East.

  9. Isolation and genetic characterization of Toxoplasma gondii from raccoons (Procyon lotor), cats (Felis domesticus), striped skunk (Mephitis mephitis), black bear (Ursus americanus), and cougar (Puma concolor) from Canada.

    Science.gov (United States)

    Dubey, J P; Quirk, T; Pittt, J A; Sundar, N; Velmurugan, G V; Kwok, O C H; Leclair, D; Hill, R; Su, C

    2008-02-01

    Viable Toxoplasma gondii was isolated by bioassay in mice from tissues of 2 feral cats (Felis domesticus), 2 raccoons (Procyon lotor), a skunk (Mephitis mephitis) trapped in remote locations in Manitoba, Canada, and a black bear (Ursus americanus) from Kuujjuaq, northern Quebec, Canada. Genotyping of these T. gondii isolates using polymorphisms at 10 nuclear markers including SAGI, SAG2, SAG3, BTUB, GRA6, c22-8, c29-2, L358, PK1, and an apicoplast marker Apico revealed 4 genotypes. None of the isolates was clonal archetypal Types I, II, and III found in the United States. These results are in contrast with the Type II genotype that is widespread in domestic animals and humans throughout the United States and Europe. This is the first genotyping of T. gondii isolates from this part of North America.

  10. Detecção de Chlamydophila felis e Herpesvirus felino tipo 1 em felídeo não doméstico no Brasil

    Directory of Open Access Journals (Sweden)

    Meire Christina Seki

    2016-07-01

    Full Text Available Poucos trabalhos descrevem a ocorrência dos agentes do complexo respiratório felino, Herpesvírus Felino tipo 1 (FHV-1 e Chlamydophila felis, e a coinfecção com o vírus da imunodeficiência felina (FIV e leucemia viral felina (FeLV em felinos não domésticos no Brasil. Entre 2009 e 2010, 72 amostras de swab de conjuntiva e de soro foram coletados de oito espécies de felinos não domésticos (Leopardus pardalis, Leopardus tigrinus, Panthera leo, Panthera tigris, Puma concolor, Puma yagouaroundi, Oncifelis colocolo, and Panthera onca mantidos em cativeiro em zoológicos brasileiros. O DNA foi extraído das amostras de swab de conjuntiva para detecção de Chlamydophila sp e FHV-1 pela PCR. Anticorpos para FIV e antígeno para FeLV foram determinados pelo kit comercial de ELISA. Anticorpos para FIV foram detectados em cinco felídeos (6,9%. Nenhuma amostra foi positiva para a presença de antígeno de FeLV. Um (1,3% dos 72 felinos não domésticos apresentou fragmentos de DNA de Chlamydophila sp e FHV-1 pela PCR. Este felino era uma jaguatirica que não apresentou anticorpos para FIV e nem antígeno para FelV. Estes resultados demonstram a ocorrência de coinfecção de C. felis e FHV-1 em uma jaguatirica (Leopardus pardalis no Brasil.

  11. Response of CYP1A Gene expression in fish liver of catfish (Ariopsis felis) from Gulf of Mexico and their relationship with the genetic variability.

    Science.gov (United States)

    Zapata-Perez, Omar; Sanchez-Teyer, Lorenzo F; Perez-Nunez, Maria T; Arroyo-Herrera, Ana L; Moreno, Adriana Quiroz; Albores-Medina, Arnulfo

    2010-01-01

    We determined the hepatic Cytochrome P4501A (CYP1A) mRNA and Ethoxyresorufin-O-deethylase (EROD) activities in the fish, Ariopsis felis, from highly polluted to relatively pristine regions in the southwest Gulf of Mexico and their relationship with the genetic polymorphisms of the same fish. We hypothesized that a high genetic variation reflects interindividual variability in levels of CYP1A mRNA underlying the pathway culminating in EROD induction caused by the environmental contaminants. Catfish from Laguna de Mecoacan exhibited marked induction of CYP1A mRNA and high levels of hepatic EROD activities, whereas fish from Laguna de Celestun showed no induction of CYP1A mRNA and moderately low levels of EROD activities. In contrast, the similarity index considering all samples varied from 0.4 to 0.87, showing a wide range of variation. A dendrogram showed a clear grouping of fish collected from the Laguna de Terminos, Rio Coatzacoalcos and Laguna de Celestun, with discrete subgroups according to region. In contrast, fish from Laguna de Mecoacan were grouped together completely separate from the rest of the fish. Despite the low number of fish from Mecoacan (a high bootstrap support was observed in this group), the results indicated a significant genetic variability in comparison with the other ecosystems included. The differential level of expression of CYP1A and the EROD activity observed among the ecosystems analyzed could be due to the high range of genetic variation, with special emphasis on fish collected in Mecoacan where it is possible to find a subspecies of Ariopsis felis.

  12. The power of example

    Science.gov (United States)

    Liliana Gheorghian, Mariana

    2014-05-01

    beginning of the XXI century" with the participation of several schools in the country in 2009 and 2011. The papers presented were diverse and gave examples of various teaching experiences and scientific information. Topics by the teachers: The impact of tourism on the environment, Tornadoes, Natural science and environmental education in school, Air Pollution and health, Ecological education of children from primary school, The effects of electromagnetic radiation, Formation of an ecological mentality using chemistry, Why should we protect water, Environmental education, Education for the future, SOS Nature, Science in the twenty-first century, etc. Topics by students: Nature- the palace of thermal phenomena, Life depends on heat, Water Mysteries, Global Heating, The Mysterious universe, etc. In March 2013 our school hosted an interesting exchange of ideas on environmental issues between our students and those from Bulgaria, Poland and Turkey, during a symposium of the Comenius multilateral project "Conserving Nature". In order to present the results of protecting nature in their communities, two projects "Citizen" qualified in the Program Civitas in the autumn of 2013. "The Battle" continues both in nature and in classrooms, in order to preserve the environment.

  13. Paragonimus y Paragonimiasis en el norte peruano. Proceso del desarrollo de Paragonimus peruvianus Miyazaki¡ Ibañez y Miranda¡ 1969 en Felis cati L. gato doméstico infectado experimentalmente.

    Directory of Open Access Journals (Sweden)

    Nicanor Ibáñez H.

    2014-06-01

    Full Text Available Se ha estudiado el proceso del desarrollo de Parogonimus peruvianus Miyazaki, Ibóñez y Miranda, 1969 en el gato doméstico, Felis cati L. infectado experimentalmente mediante la administración oral de metacercarias del parasito extraídas de ejemplares de Pseudothelphusa chilensis Milne Edwards, 1843 procedentes de áreas endémicas.

  14. Rent Seeking: A Textbook Example

    Science.gov (United States)

    Pecorino, Paul

    2007-01-01

    The author argues that the college textbook market provides a clear example of monopoly seeking as described by Tullock (1967, 1980). This behavior is also known as rent seeking. Because this market is important to students, this example of rent seeking will be of particular interest to them. (Contains 24 notes.)

  15. Ancylostoma genettae, A. protelesis, A. somaliense: three new species from wild Carnivora in the Somali Republic.

    Science.gov (United States)

    Macchioni, G

    1995-12-01

    Ancylostoma braziliense was found in Somalia in Acinonyx jubatus, Canis familiaris, C. mesomelas, Crocuta crocuta, Felis catus, F. libyca, Genetta genetta, Otocyon megalotis, Proteles cristatus; A. caninum in A. jubatus, C. familiaris, C. mesomelas, C. crocuta; A. duodenale in C. crocuta; A. iperodontatum in Lynx caracal; A. paraduodenale in Felis serval; A. tubaeforme in A. jubatus, F. catus, F. libyca; Arthrocephalus gambiense in Ichneumia albicauda; Uncinaria parvibursata in Mellivora capensis. In addition, three new species of Ancylostoma were collected: A. genettae in Genetta genetta, A. protelesis in Proteles cristatus, A. somaliense in Canis mesomelas. These new species are described and illustrated.

  16. Knock-down and speed of kill of a combination of fipronil and permethrin for the prevention of Ctenocephalides felis flea infestation in dogs.

    Science.gov (United States)

    Halos, Lénaïg; Fourie, Josephus J; Fankhauser, Becky; Beugnet, Frederic

    2016-02-02

    A topical combination of fipronil + permethrin (Frontline Tri-Act/Frontect, Merial) has recently been developed to control fleas, ticks, mosquitoes, sandflies and stable flies on dogs. Two studies were conducted to assess its speed of kill and knock-down effect on Ctenocephalides felis fleas. The combination was compared to either fipronil alone or to a combination of permethrin, dinotefuran, and pyriproxyfen, In each study, 18 dogs were randomly allocated to one of three groups: (Group 1: untreated dog; Group 2: treated once on D0 with the combination of fipronil and permethrin; Group 3: treated once on D0 either with fipronil alone (study 1) or with a combination of permethrin, dinetofuran and pyriproxyfen (study 2)). Each dog was infested with 100 unfed adult C. felis fleas on Days 2 (study 2), 7, 14, 21 and 28. Fleas were collected from dogs at 1 h and 12 h post- infestations (PI) (study 1) or at 2 h and 6 h PI (study 2) to assess efficacy and from collection pans underneath cages 1 h (study 1) or 5 min (study 2) PI to assess knock-down effect. All treated dogs had significantly (p ≤ 0.01) lower flea counts than untreated dogs at every time point in both studies. For a whole month, a significant knock-down effect against infesting fleas is obtained in five minutes PI with the combination of permethrin and fipronil. Complete efficacy (>95%) was achieved in 1 h (study 1) or 2 h (study 2) PI for 14 days and by 6 h PI for all challenges conducted throughout the month. Efficacy remains >85% at 2 h PI for the whole month. A significantly higher efficacy of the fipronil + permethrin combination compared to other treatments was demonstrated at the earliest time points for the month (1 h knock-down effect and insecticidal efficacy compared to fipronil alone; 5 min knock-down effect compared to the combination of permethrin + dinetofuran + pyriproxyfen). The rapid flea knock-down effect and speed of kill demonstrated by the spot on combination of

  17. ASPECTOS COMPARATIVOS ENTRE AS TÉCNICAS DE ALIMENTAÇÃO ENTERAL: INTUBAÇÃO NASOESOFAGIANA E ESOFAGOSTOMIA EM FELINOS DOMÉSTICOS (Felis domestica

    Directory of Open Access Journals (Sweden)

    Renata Sousa Ramos

    2006-01-01

    Full Text Available Eight domestic felines (Felis domestica, males, adults, healthy, without a defined breed, with variable weights and ages, were randomly divided into two groups of four animals and submitted to the enteral feeding techniques: nasoesophageal intubation and esophagostomy, aiming to compare clinically and surgically both techniques. The average time required for the nasoesophageal intubation (1min 15sec was significantly smaller than for the esophagostomy (5min 25sec according to Fisher¿s test. In the nasoesophageal intubation technique, an easiness in the positioning of the feeding tube was observed when compared to the esophagostomy technique, being accomplished only with local topical anesthetics. All the animals submitted to the nasoesophageal intubation technique presented sneezes and uneasiness during the feeding supply, compared to those submitted to the esophagostomy technique. Conclusions were that the nasoesophageal intubation technique allows smaller surgical and, consequently, anesthetic time; it is less traumatic; the animals submitted to the esophagostomy technique have accepted the tube better; the techniques are easily accomplished and allow the nutritional maintenance of the animals.

  18. Randomized masked controlled clinical trial to compare 7-day and 14-day course length of doxycycline in the treatment of Mycoplasma felis infection in shelter cats.

    Science.gov (United States)

    Kompare, B; Litster, A L; Leutenegger, C M; Weng, H-Y

    2013-03-01

    The aim of this study was to compare the clinical and microbial efficacy of a 7-day or a 14-day course of doxycycline for the treatment of Mycoplasma felis-infected cats with clinical signs of upper respiratory tract disease (URTD) assessed using clinical scoring criteria. Cats were randomly allocated to either the Doxy-7 group (N=20; 7-day course of oral doxycyline liquid followed by 7-days placebo); or the Doxy-14 group (N=20; 14-day course of oral doxycycline). There were no significant differences in Mycoplasma load between groups at Day 1 or Day 7 (P>0.05), but at Day 14 mean Mycoplasma load was lower in the Doxy-14 group (P=0.01). Mycoplasma load reduced over Days 1-7 in each group (PMycoplasma load at Day 14 compared to Day 1 (Poral doxycycline produced superior microbial but not clinical results compared to a 7-day course of treatment. Copyright © 2012 Elsevier Ltd. All rights reserved.

  19. Preventive efficacy of NexGard Spectra® against Dipylidium caninum infection in dogs using a natural flea (Ctenocephalides felis) infestation model

    Science.gov (United States)

    Beugnet, Frédéric; Meyer, Leon; Fourie, Josephus; Larsen, Diane

    2017-01-01

    The efficacy of a monthly oral endectocide product, NexGard Spectra® (Merial), a combination of afoxolaner and milbemycin oxime, was evaluated in a flea (Ctenocephalides felis) challenge model for the prevention of Dipylidium caninum tapeworm infection in dogs. The efficacy of treatment with NexGard Spectra® was assessed in 10 dogs following weekly flea infestation with metacestode naturally infected fleas and compared with that in 10 untreated control dogs. The 100 fleas deposited weekly on each dog were not removed until Day 35, allowing enough time for their ingestion. The microscopical analysis of 30 fleas from the flea batches before each weekly challenge demonstrated that 10–33% of the fleas were infected by D. caninum cysticercoid larvae. The arithmetic mean flea count recorded was 47.7 for the 10 untreated dogs and 0 for the 10 treated dogs at Day 35. Based on the daily collection of expelled D. caninum proglottids by dogs during the 70 days of the study, 70% (7/10) of the control dogs and 0% (0/10) of the treated dogs were infected with D. caninum (p NexGard Spectra® treatment provided indirect prevention of D. caninum infestation. No treatment-related adverse events were observed in dogs during this study. PMID:28497745

  20. Preventive efficacy of NexGard Spectra® against Dipylidium caninum infection in dogs using a natural flea (Ctenocephalides felis infestation model

    Directory of Open Access Journals (Sweden)

    Beugnet Frédéric

    2017-01-01

    Full Text Available The efficacy of a monthly oral endectocide product, NexGard Spectra® (Merial, a combination of afoxolaner and milbemycin oxime, was evaluated in a flea (Ctenocephalides felis challenge model for the prevention of Dipylidium caninum tapeworm infection in dogs. The efficacy of treatment with NexGard Spectra® was assessed in 10 dogs following weekly flea infestation with metacestode naturally infected fleas and compared with that in 10 untreated control dogs. The 100 fleas deposited weekly on each dog were not removed until Day 35, allowing enough time for their ingestion. The microscopical analysis of 30 fleas from the flea batches before each weekly challenge demonstrated that 10–33% of the fleas were infected by D. caninum cysticercoid larvae. The arithmetic mean flea count recorded was 47.7 for the 10 untreated dogs and 0 for the 10 treated dogs at Day 35. Based on the daily collection of expelled D. caninum proglottids by dogs during the 70 days of the study, 70% (7/10 of the control dogs and 0% (0/10 of the treated dogs were infected with D. caninum (p < 0.0031. Through its efficacy against fleas, NexGard Spectra® treatment provided indirect prevention of D. caninum infestation. No treatment-related adverse events were observed in dogs during this study.

  1. Preventive efficacy of NexGard Spectra(®) against Dipylidium caninum infection in dogs using a natural flea (Ctenocephalides felis) infestation model.

    Science.gov (United States)

    Beugnet, Frédéric; Meyer, Leon; Fourie, Josephus; Larsen, Diane

    2017-01-01

    The efficacy of a monthly oral endectocide product, NexGard Spectra(®) (Merial), a combination of afoxolaner and milbemycin oxime, was evaluated in a flea (Ctenocephalides felis) challenge model for the prevention of Dipylidium caninum tapeworm infection in dogs. The efficacy of treatment with NexGard Spectra(®) was assessed in 10 dogs following weekly flea infestation with metacestode naturally infected fleas and compared with that in 10 untreated control dogs. The 100 fleas deposited weekly on each dog were not removed until Day 35, allowing enough time for their ingestion. The microscopical analysis of 30 fleas from the flea batches before each weekly challenge demonstrated that 10-33% of the fleas were infected by D. caninum cysticercoid larvae. The arithmetic mean flea count recorded was 47.7 for the 10 untreated dogs and 0 for the 10 treated dogs at Day 35. Based on the daily collection of expelled D. caninum proglottids by dogs during the 70 days of the study, 70% (7/10) of the control dogs and 0% (0/10) of the treated dogs were infected with D. caninum (p NexGard Spectra(®) treatment provided indirect prevention of D. caninum infestation. No treatment-related adverse events were observed in dogs during this study. © F. Beugnet et al., published by EDP Sciences, 2017.

  2. Ecotoxicological effects of POPs on ariidae Ariopsis felis (Linnaeus, 1766) from three coastal ecosystems in the Southern Gulf of Mexico and Yucatan Peninsula.

    Science.gov (United States)

    Zapata-Pérez, Omar; Ceja-Moreno, Victor; Olmos, Mónica Roca; Pérez, María Teresa; Río-García, Marcela Del; Yarto, Mario; Mendoza-Cantú, Ania; Ize-Lema, Ana-Irina; Gavilán-García, Arturo; Felipe, Sánchez-Teyer L; Gold-Bouchot, Gerardo

    2007-08-01

    Persistent Organic Pollutants (POPs) are still used for agricultural and disease vector control, as well as for industrial purposes. In the last decades, various studies have shown that fish are sensitive to the toxicological effects of certain POPs, including a large class of endocrine- disrupting chemicals (EDCs). In the present study, the relationship between of POPs and their effects using vitellogenin gene expression as biomarker of effect in hardhead catfish Ariopsis felis (Linnaeus, 1766) from three ecosystems in the Southern Gulf of Mexico and Yucatan Peninsula are discussed. Contaminant results showed that median concentrations of PCBs, HCHs, DDTs and Chlordanes were higher in Laguna de Terminos with respect to Celestun and Dzilam. In the same way, the vitellogenin gene expression was clearly over-expressed in fish collected from Terminos Lagoon. Principal Component Analysis showed that vitellogenin gene expression is related to the concentrations of total DDTs and PCBs, and negatively related to total Drins. Overall, this study represents the first tests exploring changes in molecular diagnostic indicators following exposure of several organic compounds in our country. Vitellogenin gene expressions associated with some endocrine disruptors detected in Terminos Lagoon were measured and we can now report clear changes in fish exposed.

  3. Food habits and temporal activity patterns of the Golden Jackal Canis aureus and the Jungle Cat Felis chaos in Pench Tiger Reserve, Madhya Pradesh

    Directory of Open Access Journals (Sweden)

    A. Majumder

    2011-11-01

    Full Text Available The food habits and temporal activity patterns of the Golden Jackal Canis aureus and the Jungle Cat Felis chaus were studied between January 2008 and June 2009 in Pench Tiger Reserve (PTR, Madhya Pradesh. A total of 50 jackal scats and 85 jungle cat scats were collected where-ever encountered in the study area. Information on activity pattern was obtained using camera traps. Fifty-two pair self-triggered analog cameras were deployed in each 2 x 2 km² across the study area (> 250 km² close to animal trails which were set to work on a continuous 24 hour period. Rodents contributed maximum in the diet of these two species (65% golden jackal scats and 56% jungle cat scats. Eight thousand five hundred and sixty camera-trap nights revealed 189 jungle cat captures and 49 golden jackal captures. The activity of golden jackal had a more homogeneous distribution in time. Present study showed that although some degree of overlap is observed between the two sympatric species, an overall difference in dietary composition and activity patterns enabled them to coexist in PTR.

  4. Examples and counter-examples of log-symplectic manifolds

    NARCIS (Netherlands)

    Cavalcanti, Gil R.

    We study topological properties of log-symplectic structures and produce examples of compact manifolds with such structures. Notably, we show that several symplectic manifolds do not admit bona fide log-symplectic structures and several bona fide log-symplectic manifolds do not admit symplectic

  5. Fundamental Travel Demand Model Example

    Science.gov (United States)

    Hanssen, Joel

    2010-01-01

    Instances of transportation models are abundant and detailed "how to" instruction is available in the form of transportation software help documentation. The purpose of this paper is to look at the fundamental inputs required to build a transportation model by developing an example passenger travel demand model. The example model reduces the scale to a manageable size for the purpose of illustrating the data collection and analysis required before the first step of the model begins. This aspect of the model development would not reasonably be discussed in software help documentation (it is assumed the model developer comes prepared). Recommendations are derived from the example passenger travel demand model to suggest future work regarding the data collection and analysis required for a freight travel demand model.

  6. Interactive example-based hatching

    NARCIS (Netherlands)

    Gerl, Moritz; Isenberg, Tobias

    2013-01-01

    We present an approach for interactively generating pen-and-ink hatching renderings based on hand-drawn examples. We aim to overcome the regular and synthetic appearance of the results of existing methods by incorporating human virtuosity and illustration skills in the computer generation of such

  7. Active Learning with Irrelevant Examples

    Science.gov (United States)

    Wagstaff, Kiri; Mazzoni, Dominic

    2009-01-01

    An improved active learning method has been devised for training data classifiers. One example of a data classifier is the algorithm used by the United States Postal Service since the 1960s to recognize scans of handwritten digits for processing zip codes. Active learning algorithms enable rapid training with minimal investment of time on the part of human experts to provide training examples consisting of correctly classified (labeled) input data. They function by identifying which examples would be most profitable for a human expert to label. The goal is to maximize classifier accuracy while minimizing the number of examples the expert must label. Although there are several well-established methods for active learning, they may not operate well when irrelevant examples are present in the data set. That is, they may select an item for labeling that the expert simply cannot assign to any of the valid classes. In the context of classifying handwritten digits, the irrelevant items may include stray marks, smudges, and mis-scans. Querying the expert about these items results in wasted time or erroneous labels, if the expert is forced to assign the item to one of the valid classes. In contrast, the new algorithm provides a specific mechanism for avoiding querying the irrelevant items. This algorithm has two components: an active learner (which could be a conventional active learning algorithm) and a relevance classifier. The combination of these components yields a method, denoted Relevance Bias, that enables the active learner to avoid querying irrelevant data so as to increase its learning rate and efficiency when irrelevant items are present. The algorithm collects irrelevant data in a set of rejected examples, then trains the relevance classifier to distinguish between labeled (relevant) training examples and the rejected ones. The active learner combines its ranking of the items with the probability that they are relevant to yield a final decision about which item

  8. Wireless communication electronics by example

    CERN Document Server

    Sobot, Robert

    2014-01-01

    This book is intended for senior undergraduate and graduate students as well as practicing engineers who are involved in design and analysis of radio frequency (RF) circuits.  Fully-solved, tutorial-like examples are used to put into practice all major topics required to understand the principles underlying the main sub-circuits required to design an RF transceiver and the whole communication system. Starting with review of principles in electromagnetic (EM) transmission and signal propagation, through detailed practical analysis of RF amplifier, mixer, modulator, demodulator, and oscillator circuit topologies, all the way to the system communication theory behind the RF transceiver operation, this book systematically covers all relevant aspects in a way that is suitable for a single semester university level course. Readers will benefit from the author’s sharp focus on radio receiver design, demonstrated through hundreds of fully-solved, realistic examples, as opposed to texts that cover many aspects of e...

  9. From Utterance to Example Sentence

    DEFF Research Database (Denmark)

    Kristoffersen, Jette Hedegaard

    This poster will address some of the problems on excerption of example sentences for the online dictionary of Danish Sign Language (DTS) from a raw corpus of dialogues and monologues. In the Danish Sign Language Dictionary every meaning is illustrated by one or more sentences showing the sign...... in context. The goal of our project has been that every sentence should be taken from real language samples, but due to restriction on time and money we only managed to let approximately 50% of the sentences originate from real language samples. The remaining half of the sentences was constructed by deaf...... is to help the dictionary user to gain additional knowledge of a meaning of a sign, as well as to provide sentence constructions that can be adopted by the L2 learner. The process from the moment when a sentence has been excerpted from the corpus to the point when an example sentence is finally accepted...

  10. Carbon. Examples of Property Realization

    OpenAIRE

    I.A. Kossko; A.A. Onoprienko; T.G. Kossko

    2013-01-01

    Examples of realization of carbon properties in formation of section near-surface boundaries defining the mechanism of oxidizing (normal) wear are presented. Synthesis of strengt hening diamond- lonsdaleite -carbene «frame» and graphite with function of solid lubricant on a friction surface in high-desperse carbon environment is reviewed. Prospects of carbon ap placation in implementation of the concept of electronics on one element, and also use of thin-film structures of amorphous carbon – ...

  11. Absence of zoonotic Bartonella species in questing ticks: First detection of Bartonella clarridgeiae and Rickettsia felis in cat fleas in the Netherlands

    Directory of Open Access Journals (Sweden)

    Reimerink Johan R

    2011-04-01

    Full Text Available Abstract Background Awareness for flea- and tick-borne infections has grown in recent years and the range of microorganisms associated with these ectoparasites is rising. Bartonella henselae, the causative agent of Cat Scratch Disease, and other Bartonella species have been reported in fleas and ticks. The role of Ixodes ricinus ticks in the natural cycle of Bartonella spp. and the transmission of these bacteria to humans is unclear. Rickettsia spp. have also been reported from as well ticks as also from fleas. However, to date no flea-borne Rickettsia spp. were reported from the Netherlands. Here, the presence of Bartonellaceae and Rickettsiae in ectoparasites was investigated using molecular detection and identification on part of the gltA- and 16S rRNA-genes. Results The zoonotic Bartonella clarridgeiae and Rickettsia felis were detected for the first time in Dutch cat fleas. B. henselae was found in cat fleas and B. schoenbuchensis in ticks and keds feeding on deer. Two Bartonella species, previously identified in rodents, were found in wild mice and their fleas. However, none of these microorganisms were found in 1719 questing Ixodes ricinus ticks. Notably, the gltA gene amplified from DNA lysates of approximately 10% of the questing nymph and adult ticks was similar to that of an uncultured Bartonella-related species found in other hard tick species. The gltA gene of this Bartonella-related species was also detected in questing larvae for which a 16S rRNA gene PCR also tested positive for "Candidatus Midichloria mitochondrii". The gltA-gene of the Bartonella-related species found in I. ricinus may therefore be from this endosymbiont. Conclusions We conclude that the risk of acquiring Cat Scratch Disease or a related bartonellosis from questing ticks in the Netherlands is negligible. On the other hand fleas and deer keds are probable vectors for associated Bartonella species between animals and might also transmit Bartonella spp. to humans.

  12. Carbon. Examples of Property Realization

    Directory of Open Access Journals (Sweden)

    I.A. Kossko

    2013-11-01

    Full Text Available Examples of realization of carbon properties in formation of section near-surface boundaries defining the mechanism of oxidizing (normal wear are presented. Synthesis of strengt hening diamond- lonsdaleite -carbene «frame» and graphite with function of solid lubricant on a friction surface in high-desperse carbon environment is reviewed. Prospects of carbon ap placation in implementation of the concept of electronics on one element, and also use of thin-film structures of amorphous carbon – metal for data recording are discussed.

  13. From Utterance to Example Sentence

    DEFF Research Database (Denmark)

    Kristoffersen, Jette Hedegaard

    2010-01-01

    This poster will address some of the problems on excerption of example sentences for the online dictionary of Danish Sign Language (DTS) from a raw corpus of dialogues and monologues. In the Danish Sign Language Dictionary every meaning is illustrated by one or more sentences showing the sign...... and contains 9 parts that are assessed in the process. We allow for adjusting the real utterance if this necessarily to follow the guidelines, eg. anaphoric reference may in the real sample only occur as an eye gaze in a direction of a locus, but when we copy only a part of an utterance, this kind of reference...

  14. Author Details

    African Journals Online (AJOL)

    Oral microflora of stray domestic cats (Felis catus) found in the premises of two human hospitals in Sokoto, Nigeria Abstract PDF · Vol 7, No 1 (2008) - Articles Cutaneous leishmaniosis: Some aspects of epidemiology and a case report. Abstract PDF · Vol 7, No 1 (2008) - Articles A comparative rabies laboratory diagnosis: ...

  15. Phenology, nest-site selection and breeding success of a North ...

    African Journals Online (AJOL)

    Predation by feral cats (Felis silvestris catus), presumed to be the main cause of chick mortality, may be adversely impacting breeding success and could lead to the virtual extirpation of the yellow-legged gull and other breeding birds from the island. Key words: Laridae, seabirds, yellow-legged gull, reproductive ecology, ...

  16. A Biometric Study of Some Reproductive Components of the Male ...

    African Journals Online (AJOL)

    A biometrical study was conducted on some aspects of the reproductive system of 16 local breed Tom cats (Felis catus domestica) collected within Sokoto metropolis at different ages. The age of the cats was estimated from teeth eruption and wearing and grouped into groups A to E as A (3- 6 months), B(6 months - 1 year), ...

  17. Will a hiding box provide stress reduction for shelter cats?

    NARCIS (Netherlands)

    Vinke, Claudia|info:eu-repo/dai/nl/235196053; Godijn, L.M.; van der Leij, Ruth|info:eu-repo/dai/nl/412860430

    2014-01-01

    Domestic cats (Felis sylvestris catus) can experience serious stress in shelters. Stressful experiences can have a major impact on the cats’ welfare and may cause higher incidences of infectious diseases in the shelters due to raised cortisol levels causing immuno deficiency.Though several studies

  18. Dicty_cDB: Contig-U05044-1 [Dicty_cDB

    Lifescience Database Archive (English)

    Full Text Available ( DD016254 ) COMPOSITIONS AND METHODS FOR THE THERAPY AND DIAG... 34 7.5 2 ( AX347055 ) Sequence 2126...( DD015739 ) COMPOSITIONS AND METHODS FOR THE THERAPY AND DIAG... 34 7.6 2 ( AC108196 ) Felis catus clone

  19. Wildlife roadkill patterns on a major highway in northern Tanzania ...

    African Journals Online (AJOL)

    Wildlife species killed on the road, roadkill frequency and road characteristics were determined. A total of 101 roadkill were recorded (0.13 roadkill km−1) comprising 37 species from all terrestrial vertebrate groups, of which two species, house cat (Felis catus) and domestic dog (Canis lupus), were domesticated species.

  20. Bobcats (Lynx rufus) are natural definitive host of Besnoitia darlingi

    Science.gov (United States)

    Bovine besnoitiosis, caused by Besnoitia besnoiti, is an economically important disease of cattle in many countries but its transmission remains a mystery. Wild felids are suspected to be its definitive hosts. The domestic cat (Felis catus) is known experimental definitive host for Besnoitia species...

  1. Purifying selection on leptin genes in teleosts may be due to ...

    Indian Academy of Sciences (India)

    93, 551–556. Table 1. Organisms and accession numbers of the Leptin cDNA sequences used in this paper. Species. Gene. Accession. Amphibian. Xenopus tropicalis. Leptin. NM_001095714.1. Mammal. Felis catus. Leptin. NM_001009850.1. Rattus norvegicus. Leptin. NM_013076.3. Homo sapiens. Leptin. NM_000230.2.

  2. Selenium status in adult cats and dogs fed high levels of dietary inorganic and organic selenium

    NARCIS (Netherlands)

    Todd, S.E.; Ugarte, S.E.; Thomas, D.G.; Bosch, Guido; Hendriks, W.H.|info:eu-repo/dai/nl/298620936

    2012-01-01

    Cats (Felis catus) maintain greater blood Se concentrations compared with dogs (Canis familiaris) and, unlike dogs, show no signs of chronic Se toxicity (selenosis) when fed dietary organic Se (selenomethionine) concentrations of 10 μg/g DM. This study investigated the response of cats and dogs to

  3. Increased vitamin D-driven signalling and expression of the vitamin D receptor, MSX2, and RANKL in tooth resorption in cats

    NARCIS (Netherlands)

    Booij-Vrieling, H.E.; Ferbus, D.; Tryfonidou, M.A.; Riemers, F.M.; Penning, L.C.; Berdal, A.; Everts, V.; Hazewinkel, H.A.W.

    2010-01-01

    Tooth resorption occurs in 20-75% of cats (Felis catus). The aetiology is not known, but vitamin D is suggested to be involved. Vitamin D acts through a nuclear receptor (VDR) and increases the expression of receptor activator of nuclear factor-κB ligand (rankl) and muscle segment homeobox 2 (msx2)

  4. Dicty_cDB: Contig-U11313-1 [Dicty_cDB

    Lifescience Database Archive (English)

    Full Text Available 2e-05 AF229810_1( AF229810 |pid:none) Felis catus slow myosin heavy chai... 54 2e-05 CR382125_227( CR382125...AY232598_1( AY232598 |pid:none) Homarus americanus slow muscle myo... 52 1e-04 AB209996_1( AB209996 |pid:none)

  5. 16 CFR 301.1 - Terms defined.

    Science.gov (United States)

    2010-01-01

    ... Fur Products Name Guide and Name Guide mean the register of names of hair fleece and fur bearing... skin of any animal of the species Felis catus. (7) The term dog fur means the pelt or skin of any animal of the species Canis familiaris. (8) The term dog or cat fur product means any item of merchandise...

  6. Statics learning from engineering examples

    CERN Document Server

    Emri, Igor

    2016-01-01

    This textbook introduces and explains the basic concepts on which statics is based utilizing real engineering examples. The authors emphasize the learning process by showing a real problem, analyzing it, simplifying it, and developing a way to solve it. This feature teaches students intuitive thinking in solving real engineering problems using the fundamentals of Newton’s laws. This book also: · Stresses representation of physical reality in ways that allow students to solve problems and obtain meaningful results · Emphasizes identification of important features of the structure that should be included in a model and which features may be omitted · Facilitates students' understanding and mastery of the "flow of thinking" practiced by professional engineers.

  7. The effect of water and shampooing on the efficacy of fluralaner spot-on solution against Ixodes ricinus and Ctenocephalides felis infestations in dogs.

    Science.gov (United States)

    Taenzler, Janina; Gale, Boyd; Zschiesche, Eva; Roepke, Rainer K A; Heckeroth, Anja R

    2016-05-31

    Fluralaner spot-on solution provides immediate and persistent efficacy against tick and flea infestations in dogs and cats for 12-weeks following topical administration. The active ingredient fluralaner is distributed systemically following transdermal absorption. Therefore, this study tested the hypothesis whether water-immersion or shampooing of dogs following administration of fluralaner spot-on solution has an impact on subsequent tick and flea efficacy. Thirty-two Beagle dogs were allocated to four study groups of 8 dogs each. On day 0, dogs in the 2 treatment groups received topical administration of fluralaner (Bravecto™ spot-on solution) according to label instructions. Dogs in the 2 corresponding control groups remained untreated. On days 3, 21, 49, and 77 dogs in one treatment group and control group were water-immersed for 2-5 min, while dogs in the other treatment group and control group were shampooed 6-8 min with a commercial foaming micro-emulsion, unscented product. On days 4, 28, 56, and 84 all dogs were co-infested with 50 ± 2 female and 10 ± 2 male Ixodes ricinus and 100 ± 4 Ctenocephalides felis, with tick and flea removal and counts 48 ± 2 h post-infestation. Efficacy against ticks and fleas was calculated for each assessment time point. No treatment-related adverse event was observed in any of the 16 dogs treated with fluralaner spot-on solution during the study. Efficacy against ticks at each assessment time point was between 99.7 and 100 % in the water-immersed group and between 99.2 and 100 % in the shampooed group. Efficacy against fleas was 100 % at each assessment time point as well in the water-immersed as the shampooed group. Tick and flea reduction in both treatment groups was significant at all assessment time points (p fluralaner spot-on solution had an impact on the excellent tick and flea efficacy over the 12-week recommended re-treatment interval.

  8. Efficacy of a new spot-on formulation of selamectin plus sarolaner for cats against adult Ctenocephalides felis, flea egg production and adult flea emergence.

    Science.gov (United States)

    Vatta, Adriano F; Everett, William R; Holzmer, Susan J; Cherni, Judith A; King, Vickie L; Rugg, Douglas; Geurden, Thomas

    2017-04-01

    A new spot-on formulation of selamectin plus sarolaner was evaluated against fleas for adulticidal efficacy, and for the effect on egg production and hatching when applied to flea-infested cats. Ten male and ten female adult domestic shorthair cats were randomly assigned to one of two treatment groups based on pre-treatment flea counts. Cats received topical treatment on Day 0 in a single spot to the dorsal scapular area with either a placebo formulation or with the combination formulation at the minimal dose of 6.0mg selamectin plus 1.0mg sarolaner per kg bodyweight. On Days -1, 5, 12, 19, 26 and 33, cats were infested with approximately 100 (±5) unfed Ctenocephalides felis fleas. At 24h after treatment or 48h after subsequent flea infestation, cats were housed for a 20-h period in a cage to allow collection of flea eggs. At the end of this period, flea eggs were collected from the cages and cats were combed to remove and count live fleas. Emerged viable larvae and emerged adult fleas were counted 3days and 35days, respectively, after egg collection. The new spot-on formulation of selamectin plus sarolaner provided 100% efficacy against adult fleas up to Day 36 following a single application. Fleas on placebo-treated cats produced large numbers of eggs throughout the study, with individual counts ranging from 110 to 1256 eggs. Following treatment, four flea eggs were collected from a single selamectin/sarolaner-treated cat on Day 29, but there were no eggs collected from any other selamectin/sarolaner-treated animal during the study. No larvae or adult fleas developed from these four eggs. From the eggs collected from the placebo-treated cats, the mean percentage of live larvae and adults that emerged ranged from 67.3% to 84.2% and from 50.7% to 81.8%, respectively. A single topical treatment with a new spot-on formulation of selamectin plus sarolaner at the minimum label dose thus controlled fleas on cats and was 100% effective in preventing flea reproduction

  9. Effects of Worked Examples, Example-Problem Pairs, and Problem-Example Pairs Compared to Problem Solving

    NARCIS (Netherlands)

    Van Gog, Tamara; Kester, Liesbeth; Paas, Fred

    2010-01-01

    Van Gog, T., Kester, L., & Paas, F. (2010, August). Effects of worked examples, example-problem pairs, and problem-example pairs compared to problem solving. Paper presented at the Biannual EARLI SIG meeting of Instructional design and Learning and instruction with computers, Ulm, Germany.

  10. Example Elaboration as a Neglected Instructional Strategy

    Energy Technology Data Exchange (ETDEWEB)

    Girill, T R

    2001-07-18

    Over the last decade an unfolding cognitive-psychology research program on how learners use examples to develop effective problem solving expertise has yielded well-established empirical findings. Chi et al., Renkl, Reimann, and Neubert (in various papers) have confirmed statistically significant differences in how good and poor learners inferentially elaborate (self explain) example steps as they study. Such example elaboration is highly relevant to software documentation and training, yet largely neglected in the current literature. This paper summarizes the neglected research on example use and puts its neglect in a disciplinary perspective. The author then shows that differences in support for example elaboration in commercial software documentation reveal previously over looked usability issues. These issues involve example summaries, using goals and goal structures to reinforce example elaborations, and prompting readers to recognize the role of example parts. Secondly, I show how these same example elaboration techniques can build cognitive maturity among underperforming high school students who study technical writing. Principle based elaborations, condition elaborations, and role recognition of example steps all have their place in innovative, high school level, technical writing exercises, and all promote far transfer problem solving. Finally, I use these studies to clarify the constructivist debate over what writers and readers contribute to text meaning. I argue that writers can influence how readers elaborate on examples, and that because of the great empirical differences in example study effectiveness (and reader choices) writers should do what they can (through within text design features) to encourage readers to elaborate examples in the most successful ways. Example elaboration is a uniquely effective way to learn from worked technical examples. This paper summarizes years of research that clarifies example elaboration. I then show how example

  11. Efficacy of slow-release collar formulations of imidacloprid/flumethrin and deltamethrin and of spot-on formulations of fipronil/(s - methoprene, dinotefuran/pyriproxyfen/permethrin and (s –methoprene/amitraz/fipronil against Rhipicephalus sanguineus and Ctenocephalides felis felis on dogs

    Directory of Open Access Journals (Sweden)

    Horak Ivan G

    2012-04-01

    Full Text Available Abstract Background Two studies evaluating the efficacy of an imidacloprid/flumethrin collar (Seresto®, Bayer Animal Health, IVP, a deltamethrin collar (Scalibor®, MSD, CP1, a fipronil/(s-methoprene spot-on (Frontline Combo®, Merial, CP2, a dinotefuran/pyriproxyfen/permethrin spot-on (Vectra 3D®, Ceva, CP3 and an amitraz/fipronil/(s-methoprene spot-on (Certifect®, Merial, CP4/CP5 against repeated infestations with Rhipicephalus sanguineus and Ctenocephalides felis felis on dogs were conducted over periods of 226 days and 71 days respectively. Methods The first study comprised 4 groups of treated dogs and one untreated control group, and the second 3 groups of treated dogs and one control group. Each group consisted of 8 dogs. All dogs were infested with ticks and fleas at regular intervals. Ticks were counted 6 h, 18 h or 48 h after infestations and fleas 24 h after infestations. Efficacies of the treatments were calculated by comparison with the untreated control groups using standard descriptive statistics. Results The protective 48 h tick efficacy was 97.8% to 100% for the IVP (226 days, 69.3% to 97.4% for CP1 (170 days, 99.6% to 43.4% for CP2 (35 days and 98% to 61.4% for CP3 (35 days. The protective 18 h tick efficacy was 98% to 99.6% for the IVP (71 days, 100% to 86.5% for CP4 (29 days, 100% to 72.8% for CP4 after re-treatment (35 days and 98.8% to 54.3% for CP5 (35 days. The protective 6 h tick efficacy was 85.6% at Day 7 and 90.1% to 97.1% from Day 14 onwards for the IVP (70 days, 92.3% to 70.7% for CP4 (35 days, 97.5% to 65.2% for CP4 after re-treatment (35 days and 95.1% to 51.8% for CP5 (35 days. The protective 24 h flea efficacy was 99.5/90.9% to 100% for the IVP (71/226 days, 66.7% to 83% for CP1 (170 days, 100% to 88.5% for CP2 (35 days, 100% to 73.3% for CP3 (35 days, 100% to 98.7% for CP4 (35 days, 100% to 87.5% for CP4 after re-treatment (35 days and 100% to 79.5% for

  12. Evaluating OO example programs for CS1

    DEFF Research Database (Denmark)

    Börstler, Jürgen; Christensen, Henrik Bærbak; Bennedsen, Jens

    2008-01-01

    Example programs play an important role in learning to program. They work as templates, guidelines, and inspiration for learners when developing their own programs. It is therefore important to provide learners with high quality examples. In this paper, we discuss properties of example programs t...... that might affect the teaching and learning of object-oriented programming. Furthermore, we present an evaluation instrument for example programs and report on initial experiences of its application to a selection of examples from popular introductory programming textbooks.......Example programs play an important role in learning to program. They work as templates, guidelines, and inspiration for learners when developing their own programs. It is therefore important to provide learners with high quality examples. In this paper, we discuss properties of example programs...

  13. Time Series Analysis and Forecasting by Example

    CERN Document Server

    Bisgaard, Soren

    2011-01-01

    An intuition-based approach enables you to master time series analysis with ease Time Series Analysis and Forecasting by Example provides the fundamental techniques in time series analysis using various examples. By introducing necessary theory through examples that showcase the discussed topics, the authors successfully help readers develop an intuitive understanding of seemingly complicated time series models and their implications. The book presents methodologies for time series analysis in a simplified, example-based approach. Using graphics, the authors discuss each presented example in

  14. Collaborative Learning in Practice : Examples from Natural ...

    International Development Research Centre (IDRC) Digital Library (Canada)

    1 déc. 2010 ... Collaborative Learning in Practice : Examples from Natural Resource Management in Asia. Couverture du livre Collaborative Learning in Practice: Examples from Natural Resource Management in Asia. Directeur(s) : Ronnie Vernooy. Maison(s) d'édition : Cambridge University Press India, CRDI.

  15. Combining pharmacotherapy and psychotherapy - the example of ...

    African Journals Online (AJOL)

    QuickSilver

    2003-05-20

    May 20, 2003 ... psychotherapy - the example of depressive disorders ... Major depression is used as an example of a disorder where the combination of psychotherapy and pharmacotherapy offer great advantages. The evidence for .... channels of communication between psychiatrist and psycho- therapist. How effective is ...

  16. RFID Malware: Design Principles and Examples

    NARCIS (Netherlands)

    Rieback, M.R.; Simpson, P.N.D.; Crispo, B.; Tanenbaum, A.S.

    2006-01-01

    This paper explores the concept of malware for Radio Frequency Identification (RFID) systems - including RFID exploits, RFID worms, and RFID viruses. We present RFID malware design principles together with concrete examples; the highlight is a fully illustrated example of a self-replicating RFID

  17. Dynamic Programming: An Introduction by Example

    Science.gov (United States)

    Zietz, Joachim

    2007-01-01

    The author introduces some basic dynamic programming techniques, using examples, with the help of the computer algebra system "Maple". The emphasis is on building confidence and intuition for the solution of dynamic problems in economics. To integrate the material better, the same examples are used to introduce different techniques. One covers the…

  18. Collaborative Learning in Practice : Examples from Natural ...

    International Development Research Centre (IDRC) Digital Library (Canada)

    2010-12-01

    Collaborative Learning in Practice : Examples from Natural Resource Management in Asia. Couverture du livre Collaborative Learning in Practice: Examples from Natural Resource Management in Asia. Editor(s):. Ronnie Vernooy. Publisher(s):. Cambridge University Press India, CRDI. December 1, 2010. ISBN:.

  19. Examples and problems in mathematical statistics

    CERN Document Server

    Zacks, Shelemyahu

    2013-01-01

    This book presents examples that illustrate the theory of mathematical statistics and details how to apply the methods for solving problems.  While other books on the topic contain problems and exercises, they do not focus on problem solving. This book fills an important niche in the statistical theory literature by providing a theory/example/problem approach.  Each chapter is divided into four parts: Part I provides the needed theory so readers can become familiar with the concepts, notations, and proven results; Part II presents examples from a variety of fields including engineering, mathem

  20. HTML5 web application development by example

    CERN Document Server

    Gustafson, JM

    2013-01-01

    The best way to learn anything is by doing. The author uses a friendly tone and fun examples to ensure that you learn the basics of application development. Once you have read this book, you should have the necessary skills to build your own applications.If you have no experience but want to learn how to create applications in HTML5, this book is the only help you'll need. Using practical examples, HTML5 Web Application Development by Example will develop your knowledge and confidence in application development.

  1. PAC-Learning from General Examples

    DEFF Research Database (Denmark)

    Fischer, Paul; Hoeffgen, K.- U.; Lefmann, H.

    1997-01-01

    We study a novel view on the PAC learning model in which the examples are more complicated than in the standard model. There, an example usually is an element of the learning domain and its label indicates whether it belongs to the target concept. Here, the examples can be subsets and their labels...... indicate some relation to the target concept, e.g., whether they intersect it or not. We show how this setting can be easily transformed into the standard PAC model; however, for an analysis it is much more natural to stick to the original formulation. Then the central notion is that of the relative...

  2. Evaluation of the efficacy of topically administered imidacloprid + pyriproxyfen and orally administered spinosad against cat fleas (Ctenocephalides felis: Impact of treated dogs on flea life stages in a simulated home environment

    Directory of Open Access Journals (Sweden)

    Ross Douglas H

    2012-09-01

    Full Text Available Abstract Background Cat fleas, Ctenocephalides felis, are one of the most common ectoparasites infesting dogs and their environments. This study evaluated the efficacy of imidacloprid + pyriproxyfen (PPF (Advantage® II for Dogs and spinosad (Comfortis® against established C. felis populations in dogs’ simulated home environments. Methods Thirty Beagle dogs were randomly assigned to three groups of 10 dogs each and treated twice (Study Days 0 and 28 with imidacloprid + PPF, spinosad tablets, or a negative control (untreated. Dogs were housed individually in controlled simulated home environments capable of supporting the flea life cycle. Flea infestations were established in these environments by infesting each dog with 100 adult cat fleas on Study Days −21, -16 and 1. The impact of the treatments on fleas in the dogs’ environments were assessed by collecting floor mat samples from each simulated home environment, incubating them for 32 days, and counting the number of emerging adult fleas. On Study Days 7, 14, 21, 28, 35, 42, 49 and 56, after collection of the cocoa matting samples, each dog was infested with an additional 5 ± 1 fleas to maintain the environmental infestations. Flea comb counts on dogs were conducted on Study Days 0 (pretreatment and 63. Results From Study Days 7–28, flea infestations in the imidacloprid + PPF environments were significantly lower (p  On Study Day 63 all 10 dogs treated with imidacloprid + PPF were flea free, while only one of the 10 spinosad treated dogs was flea free. Flea counts on the other 9 spinosad treated dogs ranged from 3 to 46 fleas/dog (geometric mean = 8.6. A mean of 405 adult fleas/animal were recovered from the control dogs on Study Day 63. Conclusion Flea infestations in environments of dogs treated with imidacloprid + PPF declined more rapidly than in those containing dogs treated with spinosad. Flea infestations were completely eliminated by Study Day 56

  3. Evaluation of the efficacy of topically administered imidacloprid + pyriproxyfen and orally administered spinosad against cat fleas (Ctenocephalides felis): Impact of treated dogs on flea life stages in a simulated home environment

    Science.gov (United States)

    2012-01-01

    Background Cat fleas, Ctenocephalides felis, are one of the most common ectoparasites infesting dogs and their environments. This study evaluated the efficacy of imidacloprid + pyriproxyfen (PPF) (Advantage® II for Dogs) and spinosad (Comfortis®) against established C. felis populations in dogs’ simulated home environments. Methods Thirty Beagle dogs were randomly assigned to three groups of 10 dogs each and treated twice (Study Days 0 and 28) with imidacloprid + PPF, spinosad tablets, or a negative control (untreated). Dogs were housed individually in controlled simulated home environments capable of supporting the flea life cycle. Flea infestations were established in these environments by infesting each dog with 100 adult cat fleas on Study Days −21, -16 and 1. The impact of the treatments on fleas in the dogs’ environments were assessed by collecting floor mat samples from each simulated home environment, incubating them for 32 days, and counting the number of emerging adult fleas. On Study Days 7, 14, 21, 28, 35, 42, 49 and 56, after collection of the cocoa matting samples, each dog was infested with an additional 5 ± 1 fleas to maintain the environmental infestations. Flea comb counts on dogs were conducted on Study Days 0 (pretreatment) and 63. Results From Study Days 7–28, flea infestations in the imidacloprid + PPF environments were significantly lower (p < 0.03) than those in the spinosad environments. Following the second treatment, flea infestations in all the imidacloprid + PPF environments fell to zero for the remainder of the study. In contrast, flea infestations persisted in some of the spinosad environments through the study’s end. On Study Day 63 all 10 dogs treated with imidacloprid + PPF were flea free, while only one of the 10 spinosad treated dogs was flea free. Flea counts on the other 9 spinosad treated dogs ranged from 3 to 46 fleas/dog (geometric mean = 8.6). A mean of 405 adult fleas

  4. An Elegant Example of Chemoselective Reaction

    Indian Academy of Sciences (India)

    Home; Journals; Resonance – Journal of Science Education; Volume 13; Issue 10. An Elegant Example of a Chemoselective Reaction - The Preparation of Sulfonamide Drugs. Gopalpur Nagendrappa. General Article Volume 13 Issue 10 October 2008 pp 929-940 ...

  5. Bottomland Hardwood Planting: Example Contract Specifications

    National Research Council Canada - National Science Library

    Humprey, Monica

    2002-01-01

    This technical note provides an example of contract specifications that can be used as a template by USACE biologists, engineers, or contracting officers for contracting the planting of bottomland hardwood (BLH) seedlings...

  6. Didaktikogenic Misconception in Physics: An Example

    Indian Academy of Sciences (India)

    Home; Journals; Resonance – Journal of Science Education; Volume 21; Issue 4. Didaktikogenic Misconception in Physics: An Example. Dhrubajyoti Chattopadhyay. Classroom Volume 21 Issue 4 April 2016 pp 381-386. Fulltext. Click here to view fulltext PDF. Permanent link:

  7. Examples of non integer dimensional geometries

    OpenAIRE

    Trinchero, R.

    2008-01-01

    Two examples of spectral triples with non-integer dimension spectrum are considered. These triples involve commutative C*-algebras. The first example has complex dimension spectrum and trivial differential algebra. The other is a parameter dependent deformation of the canonical spectral triple over S1. Its dimension spectrum includes real non-integer values. It has a non-trivial differential algebra and in contrast with the one dimensional case there are no junk forms for a non-vanishing defo...

  8. Five-month comparative efficacy evaluation of three ectoparasiticides against adult cat fleas (Ctenocephalides felis), flea egg hatch and emergence, and adult brown dog ticks (Rhipicephalus sanguineus sensu lato) on dogs housed outdoors.

    Science.gov (United States)

    Varloud, Marie; Hodgkins, Elizabeth

    2015-03-01

    This study was designed to compare the efficacy of three topical combinations on dogs in outdoor conditions against adult cat fleas (Ctenocephalides felis), flea egg hatch and emergence, and against adult brown dog ticks (Rhipicephalus sanguineus sensu lato). Treatment was performed on day 0 with a placebo; dinotefuran, pyriproxifen and permethrin (DPP); fipronil and (S)-methoprene (FM) or imidacloprid and permethrin (IP). Dogs (n = 32), housed outdoors for 7 months, were treated monthly for four consecutive months (on days 0, 30, 60 and 90) and infested with ~100 unfed adult fleas on days 14, 55, 74, 115 and 150 and with ~50 unfed adult ticks on days 28, 44, 88 and 104. Adult fleas were counted and removed 24 h after infestation. Immediately after flea removal, dogs were reinfested with ~100 new adult fleas 72 h prior to egg collection for up to 48 h. Flea eggs were incubated for 32 days, and newly emerged adults were counted. Ticks were counted and removed 48 h after each infestation. FM had >90 % efficacy against fleas at each time point and variable efficacy against ticks (38.0-99.6 %). Efficacy of IP was 60 days after the last treatment. Despite challenging weather conditions, DPP was highly effective, providing >90 % efficacy against adult ticks as well as adult and immature fleas at every time point of the study.

  9. Examples from Astronomy for High School Physics

    Science.gov (United States)

    Dieterich, Sergio

    2016-01-01

    A formal course in physics is increasingly becoming a standard requirement in the high school curriculum. With that dissemination comes the challenge of reaching and motivating a population that is more diverse in their academic abilities and intrinsic motivation. The abstract nature of pure physics is often made more accessible when motivated by examples from everyday life, and providing copious mathematical as well as conceptual examples has become standard practice in high school physics textbooks. Astronomy is a naturally captivating subject and astronomical examples are often successful in capturing the curiosity of high school students as well as the general population. This project seeks to diversify the range of pedagogical materials available to the high school physics instructor by compiling and publishing specific examples where an astronomical concept can be used to motivate the physics curriculum. This collection of examples will consist of both short problems suitable for daily homework assignments as well as longer project style activities. Collaborations are encouraged and inquiries should be directed to sdieterich at carnegiescience dot edu.This work is funded by the NSF Astronomy and Astrophysics Postdoctoral Fellowship Program through NSF grant AST-1400680.

  10. Synthesizing a color algorithm from examples.

    Science.gov (United States)

    Hurlbert, A C; Poggio, T A

    1988-01-29

    A lightness algorithm that separates surface reflectance from illumination in a Mondrian world is synthesized automatically from a set of examples, which consist of pairs of input (intensity signal) and desired output (surface reflectance) images. The algorithm, which resembles a new lightness algorithm recently proposed by Land, is approximately equivalent to filtering the image through a center-surround receptive field in individual chromatic channels. The synthesizing technique, optimal linear estimation, requires only one assumption, that the operator that transforms input into output is linear. This assumption is true for a certain class of early vision algorithms that may therefore be synthesized in a similar way from examples. Other methods of synthesizing algorithms from examples, or "learning," such as back-propagation, do not yield a significantly better lightness algorithm.

  11. Prevention among immigrants: the example of Germany

    Directory of Open Access Journals (Sweden)

    Spallek Jacob

    2010-02-01

    Full Text Available Abstract Background A large and increasing part of the European population has a history of migration. Germany, for example, is home to about 15 million people with migrant background, which amounts to 19% of its population. Migrants may have differences in their lifestyle, health beliefs and risk factors compared to the autochthonous populations. Discussion As for example studies on children's participation in routine prevention activities have shown, these differences can have a relevant impact on the access of migrants to the health care system and are likely to lower their participation in prevention programs compared to the autochthonous population. To increase the uptake of prevention programs, barriers to access must be identified and approaches to reduce them must be developed. Summary Taking the example of Germany, a need exists for prevention programs that include (migrant sensitive and specifically address (migrant specific migrants. These should be of sufficient scale, evidence-based, sustainable and evaluated at regular intervals.

  12. Tutorial examples for uncertainty quantification methods.

    Energy Technology Data Exchange (ETDEWEB)

    De Bord, Sarah [Univ. of California, Davis, CA (United States)

    2015-08-01

    This report details the work accomplished during my 2015 SULI summer internship at Sandia National Laboratories in Livermore, CA. During this internship, I worked on multiple tasks with the common goal of making uncertainty quantification (UQ) methods more accessible to the general scientific community. As part of my work, I created a comprehensive numerical integration example to incorporate into the user manual of a UQ software package. Further, I developed examples involving heat transfer through a window to incorporate into tutorial lectures that serve as an introduction to UQ methods.

  13. Eclipse plugin development by example beginner's guide

    CERN Document Server

    Blewitt, Alex

    2013-01-01

    A Beginner's Guide following the ""by Example"" approach. There will be 5-8 major examples that will be used in the book to develop advanced plugins with the Eclipse IDE.This book is for Java developers who are familiar with Eclipse as a Java IDE and are interested in learning how to develop plug-ins for Eclipse. No prior knowledge of Eclipse plug-in development or OSGi is necessary, although you are expected to know how to create, run, and debug Java programs in Eclipse.

  14. Active learning techniques for librarians practical examples

    CERN Document Server

    Walsh, Andrew

    2010-01-01

    A practical work outlining the theory and practice of using active learning techniques in library settings. It explains the theory of active learning and argues for its importance in our teaching and is illustrated using a large number of examples of techniques that can be easily transferred and used in teaching library and information skills to a range of learners within all library sectors. These practical examples recognise that for most of us involved in teaching library and information skills the one off session is the norm, so we need techniques that allow us to quickly grab and hold our

  15. Example choice experiment using animations. Using animations

    OpenAIRE

    Tørrissen, Tom Kristian

    2012-01-01

    What are best practices in learning methods? That question has been and is still today still a much discussed topic. Some say learning by doing, some say read and memorize and some are not sure and try to think in new methods. One of these methods is a theory called the Example Choice theory. The purpose of this study is to investigate the effects of the Examples Choice theory in learning with the use of animations. By setting up an experiment we might be able to de...

  16. 14 CFR Appendix - Example of SIFL Adjustment

    Science.gov (United States)

    2010-01-01

    ... 14 Aeronautics and Space 4 2010-01-01 2010-01-01 false Example of SIFL Adjustment Aeronautics and Space OFFICE OF THE SECRETARY, DEPARTMENT OF TRANSPORTATION (AVIATION PROCEEDINGS) POLICY STATEMENTS STATEMENTS OF GENERAL POLICY Policies Relating to Rates and Tariffs Treatment of deferred Federal income taxes for rate purposes. Pt. 399, Subpt. C,...

  17. Proterozoic intracontinental basin: The Vindhyan example

    Indian Academy of Sciences (India)

    The Vindhyan basin is a classic example of Proterozoic intracontinental basin that developed in the central part of the Indian shield along with several other basins such as Cuddapah,Chattisgarh,etc.The strata are exposed in three major sectors:Son valley,Bundelkhand and Rajasthan. Substantially thick Vindhyan rocks ...

  18. Chemical Oscillations-Basic Principles and Examples

    Indian Academy of Sciences (India)

    Home; Journals; Resonance – Journal of Science Education; Volume 11; Issue 2. Chemical Oscillations - Basic Principles and Examples ... Protein Science and Engineering Unit Institute of Microbial Technology Sector 39A Chandigarh 160 036; Department of Chemistry and Centre for Advanced Studies in Chemistry ...

  19. An example in linear quadratic optimal control

    NARCIS (Netherlands)

    Weiss, George; Zwart, Heiko J.

    1998-01-01

    We construct a simple example of a quadratic optimal control problem for an infinite-dimensional linear system based on a shift semigroup. This system has an unbounded control operator. The cost is quadratic in the input and the state, and the weighting operators are bounded. Despite its extreme

  20. Regression Analysis by Example. 5th Edition

    Science.gov (United States)

    Chatterjee, Samprit; Hadi, Ali S.

    2012-01-01

    Regression analysis is a conceptually simple method for investigating relationships among variables. Carrying out a successful application of regression analysis, however, requires a balance of theoretical results, empirical rules, and subjective judgment. "Regression Analysis by Example, Fifth Edition" has been expanded and thoroughly…

  1. Examples of Neutrosophic Probability in Physics

    Directory of Open Access Journals (Sweden)

    Fu Yuhua

    2015-01-01

    Full Text Available This paper re-discusses the problems of the so-called “law of nonconservation of parity” and “accelerating expansion of the universe”, and presents the examples of determining Neutrosophic Probability of the experiment of Chien-Shiung Wu et al in 1957, and determining Neutrosophic Probability of accelerating expansion of the partial universe.

  2. Returnable containers: an example of reverse logistics

    NARCIS (Netherlands)

    L.G. Kroon (Leo); G.M.C. Vrijens

    1996-01-01

    textabstractConsiders the application of returnable containers as an example of reverse logistics. A returnable container is a type of secondary packaging that can be used several times in the same form, in contrast with traditional cardboard boxes. For this equipment to be used, a system for the

  3. Categorising Example Sentences in Dictionaries for Research ...

    African Journals Online (AJOL)

    The definition (counterbalance or make up for something) contains difficult vocabulary and could be misinterpreted, but the example clearly shows what offset means and how it is used. This support is especially valid in South African schools, where learners may not have the language skills and fluency for a monolingual ...

  4. Choosing between Glaser and Strauss: an example.

    Science.gov (United States)

    Cooney, Adeline

    2010-01-01

    Choosing between Glaserian and Straussian grounded theory when selecting a methodological approach can be challenging, but few papers consider this decision-making process. This paper explores the Glaser-Strauss debate using an example of a study which explored whether older people experience a sense of home in residential settings.

  5. Communication, Suspicion And Stability In Marriage: Examples ...

    African Journals Online (AJOL)

    Communication, Suspicion And Stability In Marriage: Examples From The Experiences Of Married Women In Two Private Universities In Ogun State, Nigeria. ... in homes and discourage suspicion, recruit professional counsellors, psychologists and social workers to attend to various needs of couples and intending couples.

  6. Fluid dynamics via examples and solutions

    CERN Document Server

    Nazarenko, Sergey

    2014-01-01

    "This is an excellent book for fluid dynamics students. It gives a good overview of the theory through a large set of worthy example problems. After many classical textbooks on the subject, there is finally one with solved exercises. I fully appreciate the selection of topics."-Professor Miguel Onorato, Physics Department, University of Torino.

  7. Proterozoic intracontinental basin: The Vindhyan example

    Indian Academy of Sciences (India)

    The Vindhyan basin is a classic example of Proterozoic intracontinental basin that developed in ... The Vindhyan strata define a broad, regional syncline trending ..... influenced inner shelf setting. (C hak rab orty and. B ose. 1990). Se m ri. G roup. R o h tas. F o rm ation. Th is formation b egin s w ith m assiv e, p lan e-lamin.

  8. Students' Views of Example Generation Tasks

    Science.gov (United States)

    Breen, Sinead; O'Shea, Ann; Pfeiffer, Kirsten

    2016-01-01

    We report here on students' views of example generation tasks assigned to them in two first year undergraduate Calculus courses. The design and use of such tasks was undertaken as part of a project which aimed to afford students opportunities to develop their thinking skills and their conceptual understanding. In interviews with 10 students, we…

  9. Selected critical examples of scientometric publication analysis

    DEFF Research Database (Denmark)

    Ingwersen, Peter

    2014-01-01

    of authors, institutions or countries per publication indexed by Web of Science. Methodology: The paper uses examples from earlier research evaluation studies and cases based on online data to describe issues, problematic details, pitfalls and how to overcome them in publication analysis with respect...

  10. Magnetic Force and Work: An Accessible Example

    Science.gov (United States)

    Gates, Joshua

    2014-01-01

    Despite their physics instructors' arguments to the contrary, introductory students can observe situations in which there seems to be compelling evidence for magnetic force doing work. The counterarguments are often highly technical and require physics knowledge beyond the experience of novice students, however. A simple example is presented…

  11. Some examples of geomorphodiversity in Italy

    Science.gov (United States)

    Panizza, Mario

    2014-05-01

    The concept of geomorphodiversity (Panizza, 2009) is presented: "the critical and specific assessment of the geomorphological features of a territory, by comparing them in a way both extrinsic (comparison of the geomorphological characteristics with those from other territories) and intrinsic (comparison of the geomorphological characteristics with other areas within the territory itself) and taking into account the level of their scientific quality, the scale of investigation and the purpose of the research". A first example concerns the Dolomites: they have been included in the UNESCO World Heritage List because of their exceptional beauty and unique landscape, together with their scientific importance from the geological and geomorphological point of view. They are of international significance for geomorphodiversity, as the classic site for the development of mountains in dolomite limestone and present a wide range of landforms related to erosion, tectonics and glaciation. They represent a kind of high altitude, open air laboratory of geomorphological heritage of exceptional global value, among the most extraordinary and accessible in the world and ideal for researching, teaching, understanding and developing Earth Science theories. The second example concerns the Emilia-Romagna Apennines, candidate for enrolment in the List of European Geoparks: they show a multifaceted and complex image from the international and regional geomorphological (extrinsic and intrinsic geomorphodiversity) point of view and are an educational example for illustrating morphotectonic evolution, stratigraphic and sedimentological sequences and morpholithological peculiarities connected with gypsum karst and clay mass wasting phenomena. The third example concerns the Vesuvius, one of the National Italian Parks: it shows an extrinsic geomorphodiversity mainly referred to the type of eruptions, with some exemplary processes inserted in international volcanic nomenclature; it makes up an

  12. Comparing the effects of worked examples and modeling examples on learning

    NARCIS (Netherlands)

    Hoogerheide, Vincent|info:eu-repo/dai/nl/412654504; Loyens, Sofie M M; Van Gog, Tamara|info:eu-repo/dai/nl/294304975

    2014-01-01

    Example-based learning is an effective instructional strategy for students with low prior knowledge, and is increasingly being used in online learning environments. However, examples can take many different forms and little is known about whether and how form affects learning outcomes. Therefore,

  13. NASTRAN: User experience with four example problems

    Science.gov (United States)

    Rivello, R. M.

    1972-01-01

    Four different structural problems are solved to gain familiarity with the NASTRAN computer program. The problems are: (1) a simply-supported beam subjected to lateral loads, (2) a rotating filamentary composite bar under the action of centrifugal forces, (3) a missile body with aerodynamic, gravitational, and inertial forces, and (4) a square simply-supported plate with in-plane temperature changes capable of buckling the plate. Input and output data are given for each problem. The results are compared with those obtained by other methods. However, except for the examples employing beam elements in which the agreement is excellent, the element breakup chosen for convenience in obtaining program familiarity is too coarse to draw conclusions regarding the program accuracy. The example problems disclosed errors in the plotting and thermal-buckling routines of the program.

  14. Integrated environmental impact assessment: a Canadian example.

    OpenAIRE

    Kwiatkowski, Roy E.; Ooi, Maria

    2003-01-01

    The Canadian federal process for environmental impact assessment (EIA) integrates health, social, and environmental aspects into either a screening, comprehensive study, or a review by a public panel, depending on the expected severity of potential adverse environmental effects. In this example, a Public Review Panel considered a proposed diamond mining project in Canada's northern territories, where 50% of the population are Aboriginals. The Panel specifically instructed the project proposer...

  15. Sparse representations for radar with Matlab examples

    CERN Document Server

    Knee, Peter

    2012-01-01

    Although the field of sparse representations is relatively new, research activities in academic and industrial research labs are already producing encouraging results. The sparse signal or parameter model motivated several researchers and practitioners to explore high complexity/wide bandwidth applications such as Digital TV, MRI processing, and certain defense applications. The potential signal processing advancements in this area may influence radar technologies. This book presents the basic mathematical concepts along with a number of useful MATLAB® examples to emphasize the practical imple

  16. Regionalism on the example of Hungary

    Directory of Open Access Journals (Sweden)

    Kovač Terez

    2002-01-01

    Full Text Available This paper is about the processes of association with the EU in which Hungary took place, and about the demands that should have been fulfilled. It is shown, on the example of Hungary, what progress has taken place in the last 15 years in the area of establishing of regional science and what sort of conclusion can be made for Yugoslavia. The author also deals with the possible functions of sociology in regional research.

  17. INGRID by example: A pictorial tutorial

    Energy Technology Data Exchange (ETDEWEB)

    Rainsberger, R.

    1988-11-01

    The following examples of INGRID input files and results are from various sources including Doug Stillman. In many cases, they are the same as in the examples section of the INGRID manual by Doug Stillman. I have made some modest improvements so that they are all complete input files to be run with the latest version of INGRID. These files have been attached to the front end of the INGRID source as comments. I wish to invite all INGRID user's to submit any favorite input files to be included in this tutorial. Such an input file should not be too large, and the object being generated should have a natural appeal to INGRID users. Feel free to make suggestions. This tutorial will soon replace the examples section of the manual. The entire manual will be replaced a section at a time. I chose to do this section first, since it could give the most benefit in the shortest amount of time. As soon as I make INGRID interactive, I will then rewrite the section on standard parts.

  18. Comparative efficacy on dogs of a single topical treatment with fipronil/(S-methoprene or weekly physiological hygiene shampoos against Ctenocephalides felis in a simulated flea-infested environment

    Directory of Open Access Journals (Sweden)

    Beugnet F.

    2012-05-01

    Full Text Available Flea infestations of pets continue to persist due to the lack of knowledge of flea biology and ecology. It is not unusual that pet owners believe regular hygiene, such as shampooing their dogs can replace regular insecticidal treatment. The objective of this study was to compare in a flea simulated environment, modelling exposure similar to that found in a home, that the use of regular physiological shampoo does not control fleas adequately when compared to a long acting topical formulation. Three groups of six dogs were formed: one untreated control group, one group treated monthly with the topical formulation of fipronil/(S-methoprene, and a third group treated weekly with a hygiene shampoo. All dogs were infested with adult unfed Ctenocephalides felis fleas (200 ± 5 on Days -28 and -21. Each animal’s sleeping box was fitted with a plastic cup mounted to the inside roof of the box. The sleeping bench of each animal was covered with a carpet to accommodate flea development. The dogs were maintained in their kennels throughout the study. In order to maintain the environmental flea challenge, C. felis pupae (100 ± 5 were placed in the plastic cup in each animal’s sleeping box on Days -14, -7, 0, 7, 14, 21, 28, 35 and 42. The dogs were combed and fleas counted weekly on Days -1, 3, 10, 17, 24, 31, 38, 45, and 51. The fleas were placed immediately back on the dogs. On Day 60, fleas were counted and removed. Flea infestations in the untreated control group at each count averaged between 46.2 and 74.2 fleas throughout the study. The average number of fleas infesting dogs was significantly different (p < 0.05 between the untreated and the two treatment groups and between the two treatment groups at all counts throughout the two months study (Days 3, 10, 17, 24, 31, 38, 45, 51 and 60. The efficacy was never below 99.1% in the fipronil/(S-methoprene group, and efficacy in the shampoo group was never above 79.2%. Weekly shampooing in treatment

  19. Assessment of the efficacy of a topical combination of fipronil-permethrin (Frontline Tri-Act®/Frontect®) against egg laying and adult emergence of the cat flea (Ctenocephalides felis) in dogs.

    Science.gov (United States)

    Beugnet, Frédéric; Halos, Lénaïg; Lebon, Wilfried; Liebenberg, Julian

    2016-01-01

    This study was conducted to assess the prevention of egg laying and the inhibition of the emergence of the cat flea (Ctenocephalides felis) resulting from the application of a combination of fipronil and permethrin (Frontline Tri-Act ® /Frontect ® , Merial) on dogs. Sixteen healthy dogs were included after pre-treatment live flea counts and randomly allocated to two groups. Eight dogs served as untreated controls and 8 dogs were treated on Day 0 and Day 30 with topical application of fipronil/permethrin at the minimum dose of 6.76 mg/kg fipronil and 50.48 mg/kg permethrin. On days -2, 7, 21, 28, 42 and 56, each dog was infested with 100 fleas. Flea eggs were collected from each dog in individual trays from 12 to 36 h after treatment or each flea re-infestation. All fleas were removed by combing and counted 36 h after treatment or infestations. The collected eggs were counted and incubated for 28 days for larval development and adult emergence assessment. The curative efficacy of Frontline Tri-Act ® /Frontect ® against adult fleas 36 h after treatment was 95.3% and the efficacy remained 100% after subsequent flea infestations for 8 weeks. Compared to the control group, the treatment reduced egg laying by 84.5% within 36 h after first treatment and was 99.9%, 100%, 100%, 100%, 100% on collection days 7, 21, 29, 43 and 57, respectively. Frontline Tri-Act ® /Frontect ® reduced by 28.7% the emergence of new adult fleas from eggs laid during the 48 h of pre-treatment infestation. The inhibition of adult emergence from incubated flea eggs could not be assessed after flea re-infestation in the treated group as no eggs were collected. © F. Beugnet et al., published by EDP Sciences, 2016.

  20. Assessment of the efficacy of a topical combination of fipronil-permethrin (Frontline Tri-Act®/Frontect® against egg laying and adult emergence of the cat flea (Ctenocephalides felis in dogs

    Directory of Open Access Journals (Sweden)

    Beugnet Frédéric

    2016-01-01

    Full Text Available This study was conducted to assess the prevention of egg laying and the inhibition of the emergence of the cat flea (Ctenocephalides felis resulting from the application of a combination of fipronil and permethrin (Frontline Tri-Act®/Frontect®, Merial on dogs. Sixteen healthy dogs were included after pre-treatment live flea counts and randomly allocated to two groups. Eight dogs served as untreated controls and 8 dogs were treated on Day 0 and Day 30 with topical application of fipronil/permethrin at the minimum dose of 6.76 mg/kg fipronil and 50.48 mg/kg permethrin. On days −2, 7, 21, 28, 42 and 56, each dog was infested with 100 fleas. Flea eggs were collected from each dog in individual trays from 12 to 36 h after treatment or each flea re-infestation. All fleas were removed by combing and counted 36 h after treatment or infestations. The collected eggs were counted and incubated for 28 days for larval development and adult emergence assessment. The curative efficacy of Frontline Tri-Act®/Frontect® against adult fleas 36 h after treatment was 95.3% and the efficacy remained 100% after subsequent flea infestations for 8 weeks. Compared to the control group, the treatment reduced egg laying by 84.5% within 36 h after first treatment and was 99.9%, 100%, 100%, 100%, 100% on collection days 7, 21, 29, 43 and 57, respectively. Frontline Tri-Act®/Frontect® reduced by 28.7% the emergence of new adult fleas from eggs laid during the 48 h of pre-treatment infestation. The inhibition of adult emergence from incubated flea eggs could not be assessed after flea re-infestation in the treated group as no eggs were collected.

  1. The 18-kDa form of cat allergen Felis domesticus 1 (Fel d 1) is associated with gelatin- and fibronectin-degrading activity

    DEFF Research Database (Denmark)

    Ring, P C; Wan, H; Schou, C

    2000-01-01

    BACKGROUND: Fel d 1, an important allergen from domestic cats, is a significant cause of asthma. In addition to directly promoting IgE synthesis, other biological activities of allergens may contribute to either allergic sensitization or the magnitude of allergic effector responses. For example, ...... is associated with enzyme activity. METHODS: Fel d 1 was obtained by a rigorous purification strategy and its identity confirmed by laser desorption mass spectrometry, cleavage and sequencing. The ability of Fel d 1 to degrade gelatin, fibronectin and the artificial substrate N...... was not altered by inhibitors of cysteine peptidases, matrix metallopeptidases or by removal of divalent cations. In contrast, aprotinin and TLCK were inhibitors of Fel d 1. The absence of a serine peptidase catalytic triad in Fel d 1, together with the stoichiometry of the inhibition of TLCK and aprotinin...

  2. OpenCL programming by example

    CERN Document Server

    Banger, Ravishekhar

    2013-01-01

    This book follows an example-driven, simplified, and practical approach to using OpenCL for general purpose GPU programming.If you are a beginner in parallel programming and would like to quickly accelerate your algorithms using OpenCL, this book is perfect for you! You will find the diverse topics and case studies in this book interesting and informative. You will only require a good knowledge of C programming for this book, and an understanding of parallel implementations will be useful, but not necessary.

  3. [Janusz Korczak: an example of unlimited devotion].

    Science.gov (United States)

    Urdaneta Carruyo, Eliéxer; Dairy Salcedo, Roxani

    2014-12-01

    Janusz Korczak was a prominent educator and humanist of the twentieth century. His ideas for reforming the education of children inspired generations of teachers and still remain valid. His main contribution was to introduce the pedagogical principle of autonomy, in order that the child be starring in their actions and accountable for their decisions, and in turn, he was respected as a person by their teachers. His heroic and touching life was a song of hope and love to abandoned children and his memory will live on as an example of devotion without limit.

  4. Some recent examples of fractal music

    Science.gov (United States)

    Guerra-Torres, Cesar; Hinojosa-Rivera, Moises; Garza-Garza, Juan Angel; Elizondo-Garza, Fernando J.

    2002-11-01

    Since the first published studies of fractal music by Mandelbrot and Voss, the relationship between music, mathematics, and fractal geometry has been a very active field of research. It has been found that the music of classical composers can be characterized by fractal or self-affine parameters, which in turn serve as the basis for synthetic fractal music. In this work is presented a brief discussion of the state of the art as well as some recent examples of fractal music, including a live demonstration.

  5. Planetary Protection: Two Relevant Terrestrial Examples

    Science.gov (United States)

    Chyba, C.

    2002-09-01

    Concerns about potential pathogens in returned samples from Mars ("Mars Sample Return: Issues and Recommendations", National Research Council, 1997) or planetary satellites ("Evaluating the Biological Potential in Samples Returned from Planetary Satellites and Small Solar System Bodies", National Research Council, 1998) focus on two potential types of pathogenesis, toxic and infectious. The National Research Council reports cited above state that the chances of extraterrestrial organisms proving either toxic or infectious to humans are extremely low, but cannot be entirely ruled out. Here I discuss recently discovered terrestrial examples relevant to each possibility, in order to make these concerns concrete. The first example concerns the production of hepatotoxins (toxins affecting the liver) and neurotoxins by cyanobacteria in glacial lakes on alpine pastures in Switzerland. In this example, mat-forming benthic cyanobacteria are implicated in a hundred cattle poisonings that have been reported from alpine pasteurs in southeastern Switzerland over the past twenty-five years (e.g. K. Mez et al, Hydrobiologia 368, 1-15 (1998)). It is unlikely that these cyanobacteria evolved the toxins in response to dairy cows; rather the susceptibility of cattle to these toxins seems simply to be an unfortunate coincidence of a toxin working across a large evolutionary distance. The second example concerns the recent demonstration that the decimation of shallow-water Caribbean elkhorn coral is due to infection by a common fecal enterobacterium associated with the human gut (K. L. Patterson et al., PNAS 99, 8725-8730 (2002)). The bacterium, Serratia marcenscens, is also a free-living microbe in water and soil, as well as an opportunistic pathogen in a variety of animal species. The distance between humans and corals emphasizes the possibility that certain organisms may prove pathogenic across a wide evolutionary divide. Of course, in neither of these cases are the evolutionary

  6. Examples of Residual Heat Projects; Voorbeeldprojecten Restwarmte

    Energy Technology Data Exchange (ETDEWEB)

    NONE

    2011-03-15

    An overview is given of applied technology, results, method, lessons learned and project data of 9 examples of projects in the Netherlands in which residual heat is produced and used [Dutch] Een overzicht is gegeven van de toegepaste techniek, resultaten, aanpak, lessons learned, en kerngegevens van 9 restwarmte voorbeeldprojecten: Restwarmtekoppeling Moerdijk; Melkpoederfabriek verwarmt zwembad en school in Beilen; Verzorgingstehuis in Leeuwarden krijgt restwarmte van rioolwaterzuivering; Warmtenet Maastricht draait op restwarmte papierfabriek; Stoomgrid Delfzijl voorziet industrieterrein van stoom en warmte; Fosforfabriek wint warmte uit fosforverbranding; Diervoederproducent levert warmte aan bedrijventerrein Kesteren; Kunstmestfabriek levert restwarmte en CO2 aan glastuinbouw; Aluminiumproducent levert restwarmte voor gassenterminal.

  7. Fuzzy Clustering - Principles, Methods and Examples

    DEFF Research Database (Denmark)

    Kroszynski, Uri; Zhou, Jianjun

    1998-01-01

    One of the most remarkable advances in the field of identification and control of systems -in particular mechanical systems- whose behaviour can not be described by means of the usual mathematical models, has been achieved by the application of methods of fuzzy theory.In the framework of a study ...... of the methods. The examples were solved by hand and served as a test bench for exploration of the MATLAB capabilities included in the Fuzzy Control Toolbox. The fuzzy clustering methods described include Fuzzy c-means (FCM), Fuzzy c-lines (FCL) and Fuzzy c-elliptotypes (FCE)....

  8. Continuum modeling an approach through practical examples

    CERN Document Server

    Muntean, Adrian

    2015-01-01

    This book develops continuum modeling skills and approaches the topic from three sides: (1) derivation of global integral laws together with the associated local differential equations, (2) design of constitutive laws and (3) modeling boundary processes. The focus of this presentation lies on many practical examples covering aspects such as coupled flow, diffusion and reaction in porous media or microwave heating of a pizza, as well as traffic issues in bacterial colonies and energy harvesting from geothermal wells. The target audience comprises primarily graduate students in pure and applied mathematics as well as working practitioners in engineering who are faced by nonstandard rheological topics like those typically arising in the food industry.

  9. Exploratory multivariate analysis by example using R

    CERN Document Server

    Husson, Francois; Pages, Jerome

    2010-01-01

    Full of real-world case studies and practical advice, Exploratory Multivariate Analysis by Example Using R focuses on four fundamental methods of multivariate exploratory data analysis that are most suitable for applications. It covers principal component analysis (PCA) when variables are quantitative, correspondence analysis (CA) and multiple correspondence analysis (MCA) when variables are categorical, and hierarchical cluster analysis.The authors take a geometric point of view that provides a unified vision for exploring multivariate data tables. Within this framework, they present the prin

  10. ETHNIC TOURISM: AN EXAMPLE FROM ISTANBUL, TURKEY

    Directory of Open Access Journals (Sweden)

    ISTVÁN EGRESI

    2014-06-01

    Full Text Available Ethnic Tourism: An Example from Istanbul, Turkey. Globalization has not only produced a trend towards economic integration and cultural homogenization but has also encouraged the preservation of local diversity and of multiculturalism. Whereas in the past ethnic or religious minorities were seen as a threat to the territorial unity of the country, today, increasingly countries are promoting ethnicities to attract tourists. Ethnic tourism is an alternative form of tourism that relies on attracting tourists to see sites connected to the cultural and historical heritage of ethnic minorities. This study explores the potential for ethnic tourism development in Istanbul, a city with a multicultural past and great heritage attractions.

  11. Examples in parametric inference with R

    CERN Document Server

    Dixit, Ulhas Jayram

    2016-01-01

    This book discusses examples in parametric inference with R. Combining basic theory with modern approaches, it presents the latest developments and trends in statistical inference for students who do not have an advanced mathematical and statistical background. The topics discussed in the book are fundamental and common to many fields of statistical inference and thus serve as a point of departure for in-depth study. The book is divided into eight chapters: Chapter 1 provides an overview of topics on sufficiency and completeness, while Chapter 2 briefly discusses unbiased estimation. Chapter 3 focuses on the study of moments and maximum likelihood estimators, and Chapter 4 presents bounds for the variance. In Chapter 5, topics on consistent estimator are discussed. Chapter 6 discusses Bayes, while Chapter 7 studies some more powerful tests. Lastly, Chapter 8 examines unbiased and other tests. Senior undergraduate and graduate students in statistics and mathematics, and those who have taken an introductory cou...

  12. Template for safety reports with descriptive example

    Energy Technology Data Exchange (ETDEWEB)

    NONE

    1995-12-01

    This report provides a template for future safety reports on long-term safety in support of important decisions and permit applications in connection with the construction of a deep repository system. The template aims at providing a uniform structure for describing long-term safety, after the repository has been closed and sealed. The availability of such a structure will simplify both preparation and review of the safety reports, and make it possible to follow how safety assessments are influenced by the progressively more detailed body of data that emerges. A separate section containing `descriptive examples` has been appended to the template. This section illustrates what the different chapters of the template should contain. 279 refs.

  13. Sustainability through service perspectives, concepts and examples

    CERN Document Server

    Wolfson, Adi; Martin, Patrick M; Tavor, Dorith

    2015-01-01

    This book discusses the mutual relationship between service and sustainability. It covers methodologies and approaches and describes measurements and tools that can promote sustainability on the service market. Lastly, it presents the different applications of sustainability, together with examples of sustainable services. Environmental concerns have become integral to any decision-making process in the design and implementation of goods and services. With the increasing dominance of the service sector, and as service systems become more complex and interdisciplinary, the focus must move from the exchange of products to that of services. Newly created services should thus aim to incorporate sustainability into their designs while viewing sustainability as a service in its own right. Integrating sustainability in the service design and development process is essential to improving the sustainability of our society and preserving the environment. Moreover, doing so shifts the service boundaries from values that...

  14. Best Practice Examples of Circular Business Models

    DEFF Research Database (Denmark)

    Guldmann, Eva

    the potential to provide significant economic benefits in addition to new ways of forming partnerships with suppliers and connecting with customers. Furthermore, circular business models generate essential environmental benefits as a result of the improved resource productivity they offer. These benefits are......Best practice examples of circular business models are presented in this report. The purpose is to inform and inspire interested readers, in particular companies that aspire to examine the potentials of the circular economy. Circular business models in two different sectors are examined, namely...... the textile and clothing sector as well as the durable goods sector. In order to appreciate the notion of circular business models, the basics of the circular economy are outlined along with three frameworks for categorizing the various types of circular business models. The frameworks take point of departure...

  15. Examples of industrial achievements. [Energy economies

    Energy Technology Data Exchange (ETDEWEB)

    1982-07-01

    Several examples are presented of industrial units concerned by energy economies. The problem, the solution, the energy savings and the financial balance are given for each following case: recuperation of smoke from two glass furnaces with continuous heat and power production; a new type of heating furnace for non-ferrous ingots; heating furnace with smoke recuperation; high-power boiler for very wet barks; smokes to supply heat to buildings and for a dryer; heat pump drying of plaster squares; air-conditioning of a workshop by recuperation on a furnace; dehydration of fodder and beetroot pulp with a straw generator; microprocessor-controlled hot water recuperation in cheese-making; electronic speed regulation for electronic motors.

  16. Differential geometry basic notions and physical examples

    CERN Document Server

    Epstein, Marcelo

    2014-01-01

    Differential Geometry offers a concise introduction to some basic notions of modern differential geometry and their applications to solid mechanics and physics. Concepts such as manifolds, groups, fibre bundles and groupoids are first introduced within a purely topological framework. They are shown to be relevant to the description of space-time, configuration spaces of mechanical systems, symmetries in general, microstructure and local and distant symmetries of the constitutive response of continuous media. Once these ideas have been grasped at the topological level, the differential structure needed for the description of physical fields is introduced in terms of differentiable manifolds and principal frame bundles. These mathematical concepts are then illustrated with examples from continuum kinematics, Lagrangian and Hamiltonian mechanics, Cauchy fluxes and dislocation theory. This book will be useful for researchers and graduate students in science and engineering.

  17. Introducing Programming Languages Through Data Acquisition Examples

    Directory of Open Access Journals (Sweden)

    Slavko Kocijancic

    2008-10-01

    Full Text Available Motivating students at low and upper secondary schools to learn programming languages is not an easy task for a teacher. Namely, programming is not and easy job to do and the results of first “programs” seem to be very poor compared even to free software available on the web. So why learn programming languages? To overcome the trouble of motivation in teaching programming languages, we have developed a course to introduce Delphi, Visual basic, C++, LabView, … based on practical examples supported by self developed, low-cost data acquisition modules. In-service teachers at secondary schools who attended the workshops accepted this concept positively, most of them reported about positive change of students’ attitude regarding programming classes.

  18. Examples of reflection positive field theories

    Science.gov (United States)

    Trinchero, R.

    The requirement of reflection positivity (RP) for Euclidean field theories is considered. This is done for the cases of a scalar field, a higher derivative scalar field theory and the scalar field theory defined on a non-integer dimensional space (NIDS). It is shown that regarding RP, the analytical structure of the corresponding Schwinger functions plays an important role. For the higher derivative scalar field theory, RP does not hold. However for the scalar field theory on a NIDS, RP holds in a certain range of dimensions where the corresponding Minkowskian field is defined on a Hilbert space with a positive definite scalar product that provides a unitary representation of the Poincaré group. In addition, and motivated by the last example, it is shown that, under certain conditions, one can construct non-local reflection positive Euclidean field theories starting from the corrected two point functions of interacting local field theories.

  19. Query-by-example surgical activity detection.

    Science.gov (United States)

    Gao, Yixin; Vedula, S Swaroop; Lee, Gyusung I; Lee, Mija R; Khudanpur, Sanjeev; Hager, Gregory D

    2016-06-01

    Easy acquisition of surgical data opens many opportunities to automate skill evaluation and teaching. Current technology to search tool motion data for surgical activity segments of interest is limited by the need for manual pre-processing, which can be prohibitive at scale. We developed a content-based information retrieval method, query-by-example (QBE), to automatically detect activity segments within surgical data recordings of long duration that match a query. The example segment of interest (query) and the surgical data recording (target trial) are time series of kinematics. Our approach includes an unsupervised feature learning module using a stacked denoising autoencoder (SDAE), two scoring modules based on asymmetric subsequence dynamic time warping (AS-DTW) and template matching, respectively, and a detection module. A distance matrix of the query against the trial is computed using the SDAE features, followed by AS-DTW combined with template scoring, to generate a ranked list of candidate subsequences (substrings). To evaluate the quality of the ranked list against the ground-truth, thresholding conventional DTW distances and bipartite matching are applied. We computed the recall, precision, F1-score, and a Jaccard index-based score on three experimental setups. We evaluated our QBE method using a suture throw maneuver as the query, on two tool motion datasets (JIGSAWS and MISTIC-SL) captured in a training laboratory. We observed a recall of 93, 90 and 87 % and a precision of 93, 91, and 88 % with same surgeon same trial (SSST), same surgeon different trial (SSDT) and different surgeon (DS) experiment setups on JIGSAWS, and a recall of 87, 81 and 75 % and a precision of 72, 61, and 53 % with SSST, SSDT and DS experiment setups on MISTIC-SL, respectively. We developed a novel, content-based information retrieval method to automatically detect multiple instances of an activity within long surgical recordings. Our method demonstrated adequate recall

  20. Toxoplasmosis in Sand cats (Felis margarita) and other animals in the Breeding Centre for Endangered Arabian Wildlife in the United Arab Emirates and Al Wabra Wildlife Preservation, the State of Qatar.

    Science.gov (United States)

    Dubey, J P; Pas, An; Rajendran, C; Kwok, O C H; Ferreira, L R; Martins, J; Hebel, C; Hammer, S; Su, C

    2010-09-20

    The Sand cat (Felis margarita) is a small-sized felid found in sand and stone deserts ranging from the north of Africa to Asia, with the Arabian Peninsula as its centre of distribution. The Sand cat captive breeding program at the Breeding Centre for Endangered Arabian Wildlife (BCEAW), Sharjah, UAE, has experienced high newborn mortality rates, and congenital toxoplasmosis was recently recognized as one of the causes of this mortality. In the present study, one 18-month-old Sand cat (FM019) died of acute toxoplasmosis-associated hepatitis and pneumonitis acquired after birth; Toxoplasma gondii was demonstrated in histological sections which reacted with T. gondii polyclonal antibodies by immunohistochemistry (IHC). T. gondii DNA was found by PCR of extracted DNA from liver and lung tissues of this cat. Antibodies to T. gondii were found in serum examined in 1:1600 dilution in the modified agglutination test (MAT); its 2-year-old cage mate seroconverted (MAT titer 1:3200) at the same time. Another Sand cat (FM017) was euthanized because of ill health when 3 years old; its MAT titer was >1:3200, and T. gondii tissue cysts were found in brain, heart, ocular muscles and skeletal muscle, confirmed by IHC. Viable T. gondii was isolated by bioassays in mice inoculated with tissues of another chronically infected Sand cat (FM002); T. gondii was not found in histological sections of this cat. T. gondii antibodies were found in several species of animals tested, notably in 49 of 57 wild felids at BCEAW. A 7-year-old Sand cat (3657) from Al Wabra Wildlife Preservation (AWWP), Doha, State of Qatar died of acute visceral toxoplasmosis with demonstrable T. gondii tachyzoites by IHC, and T. gondii DNA by PCR, and a MAT titer of >3200. T. gondii antibodies were found in 21 of 27 of wild felids at AWWP. PCR-RFLP genotyping at 10 genetic loci revealed that these T. gondii isolates from Sand cat (FM002 and FM019) at BCEAW have an atypical genotype, which was previously reported in T

  1. Using Example Problems to Improve Student Learning in Algebra: Differentiating between Correct and Incorrect Examples

    Science.gov (United States)

    Booth, Julie L.; Lange, Karin E.; Koedinger, Kenneth R.; Newton, Kristie J.

    2013-01-01

    In a series of two "in vivo" experiments, we examine whether correct and incorrect examples with prompts for self-explanation can be effective for improving students' conceptual understanding and procedural skill in Algebra when combined with guided practice. In Experiment 1, students working with the Algebra I Cognitive Tutor were randomly…

  2. Ecological Forecasting Project Management with Examples

    Science.gov (United States)

    Skiles, J. W.; Schmidt, Cindy; Estes, Maury; Turner, Woody

    2017-01-01

    Once scientists publish results of their projects and studies, all too often they end up on the shelf and are not otherwise used. The NASA Earth Science Division established its Applied Sciences Program (ASP) to apply research findings to help solve and manage real-world problems and needs. ASP-funded projects generally produce decision support systems for operational applications which are expected to last beyond the end of the NASA funding. Because of NASAs unique perspective of looking down on the Earth from space, ASP studies involve the use of remotely sensed information consisting of satellite data and imagery as well as information from sub-orbital platforms. ASP regularly solicits Earth science proposals that address one or more focus areas; disasters mitigation, ecological forecasting, health and air quality, and water resources. Reporting requirements for ASP-funded projects are different from those typical for research grants from NASA and other granting agencies, requiring management approaches different from other programs. This presentation will address the foregoing in some detail and give examples of three ASP-funded ecological forecasting projects that include: 1) the detection and survey of chimpanzee habitat in Africa from space, 2) harmful algal blooms (HABs) in the California Current System affecting aquaculture facilities and marine mammal populations, and 3) a call for the public to identify North America wildlife in Wisconsin using trail camera photos. Contact information to propose to ASP solicitations for those PIs interested is also provided.

  3. Linguistic evaluation of terrorist scenarios: example application.

    Energy Technology Data Exchange (ETDEWEB)

    Darby, John L.

    2007-03-01

    In 2005, a group of international decision makers developed a manual process for evaluating terrorist scenarios. That process has been implemented in the approximate reasoning Java software tool, LinguisticBelief, released in FY2007. One purpose of this report is to show the flexibility of the LinguisticBelief tool to automate a custom model developed by others. LinguisticBelief evaluates combinations of linguistic variables using an approximate reasoning rule base. Each variable is comprised of fuzzy sets, and a rule base describes the reasoning on combinations of variables fuzzy sets. Uncertainty is considered and propagated through the rule base using the belief/plausibility measure. This report documents the evaluation and rank-ordering of several example terrorist scenarios for the existing process implemented in our software. LinguisticBelief captures and propagates uncertainty and allows easy development of an expanded, more detailed evaluation, neither of which is feasible using a manual evaluation process. In conclusion, the Linguistic-Belief tool is able to (1) automate an expert-generated reasoning process for the evaluation of the risk of terrorist scenarios, including uncertainty, and (2) quickly evaluate and rank-order scenarios of concern using that process.

  4. Integrated environmental impact assessment: a Canadian example.

    Science.gov (United States)

    Kwiatkowski, Roy E; Ooi, Maria

    2003-01-01

    The Canadian federal process for environmental impact assessment (EIA) integrates health, social, and environmental aspects into either a screening, comprehensive study, or a review by a public panel, depending on the expected severity of potential adverse environmental effects. In this example, a Public Review Panel considered a proposed diamond mining project in Canada's northern territories, where 50% of the population are Aboriginals. The Panel specifically instructed the project proposer to determine how to incorporate traditional knowledge into the gathering of baseline information, preparing impact prediction, and planning mitigation and monitoring. Traditional knowledge is defined as the knowledge, innovations and practices of indigenous and/or local communities developed from experience gained over the centuries and adapted to local culture and environment. The mining company was asked to consider in its EIA: health, demographics, social and cultural patterns; services and infrastructure; local, regional and territorial economy; land and resource use; employment, education and training; government; and other matters. Cooperative efforts between government, industry and the community led to a project that coordinated the concerns of all interested stakeholders and the needs of present and future generations, thereby meeting the goals of sustainable development. The mitigation measures that were implemented take into account: income and social status, social support networks, education, employment and working conditions, physical environments, personal health practices and coping skills, and health services.

  5. Statistics of Parameter Estimates: A Concrete Example

    KAUST Repository

    Aguilar, Oscar

    2015-01-01

    © 2015 Society for Industrial and Applied Mathematics. Most mathematical models include parameters that need to be determined from measurements. The estimated values of these parameters and their uncertainties depend on assumptions made about noise levels, models, or prior knowledge. But what can we say about the validity of such estimates, and the influence of these assumptions? This paper is concerned with methods to address these questions, and for didactic purposes it is written in the context of a concrete nonlinear parameter estimation problem. We will use the results of a physical experiment conducted by Allmaras et al. at Texas A&M University [M. Allmaras et al., SIAM Rev., 55 (2013), pp. 149-167] to illustrate the importance of validation procedures for statistical parameter estimation. We describe statistical methods and data analysis tools to check the choices of likelihood and prior distributions, and provide examples of how to compare Bayesian results with those obtained by non-Bayesian methods based on different types of assumptions. We explain how different statistical methods can be used in complementary ways to improve the understanding of parameter estimates and their uncertainties.

  6. Dynamical systems examples of complex behaviour

    CERN Document Server

    Jost, Jürgen

    2005-01-01

    Our aim is to introduce, explain, and discuss the fundamental problems, ideas, concepts, results, and methods of the theory of dynamical systems and to show how they can be used in speci?c examples. We do not intend to give a comprehensive overview of the present state of research in the theory of dynamical systems, nor a detailed historical account of its development. We try to explain the important results, often neglecting technical re?nements 1 and, usually, we do not provide proofs. One of the basic questions in studying dynamical systems, i.e. systems that evolve in time, is the construction of invariants that allow us to classify qualitative types of dynamical evolution, to distinguish between qualitatively di?erent dynamics, and to studytransitions between di?erent types. Itis also important to ?nd out when a certain dynamic behavior is stable under small perturbations, as well as to understand the various scenarios of instability. Finally, an essential aspect of a dynamic evolution is the transformat...

  7. Radiation transport Part B: Applications with examples

    Energy Technology Data Exchange (ETDEWEB)

    Beutler, D.E.

    1997-06-01

    In the previous sections Len Lorence has described the need, theory, and types of radiation codes that can be applied to model the results of radiation effects tests or working environments for electronics. For the rest of this segment, the author will concentrate on the specific ways the codes can be used to predict device response or analyze radiation test results. Regardless of whether one is predicting responses in a working or test environment, the procedures are virtually the same. The same can be said for the use of 1-, 2-, or 3-dimensional codes and Monte Carlo or discrete ordinates codes. No attempt is made to instruct the student on the specifics of the code. For example, the author will not discuss the details, such as the number of meshes, energy groups, etc. that are appropriate for a discrete ordinates code. For the sake of simplicity, he will restrict himself to the 1-dimensional code CEPXS/ONELD. This code along with a wide variety of other radiation codes can be obtained form the Radiation Safety Information Computational Center (RSICC) for a nominal handling fee.

  8. Residentialization of Public Spaces: Bratislava Example

    Science.gov (United States)

    Bacová, Andrea; Puškár, Branislav; Vráblová, Edita

    2017-10-01

    The housing estates in Bratislava saturated the housing needs of a large number of inhabitants who come after World War II to the city. Design of public spaces often did not have priority in the process of designing. The solutions for mentioned exterior spaces had been planned after blocks of flat realization, but many of them are not realized to this day. The article analyzes the example of the unrealized public spaces in existing housing estates Devinska Nova Ves and Petržalka (city districts of Bratislava) and offer practical solutions in relation to residencialization method. Residencialization of missing public places is an effective method of adding identities to settlements. It improves the quality of residential environment and public spaces. The main aim is to create better conditions for social activities in public areas, which are missing on the present. The research will be focused on the examination of the urban, cultural and construction potential of the existing residential enviroment in Bratislava. The main aim of residentialization is not only to enhance the quality of spatial and building structures in the selected residential area and maintain long-term sustainability in the pertinent programme area, but mainly to improve the quality of living for the residents. The outputs of the project are proposals and practical procedures developed with regard to planning documents for local municipal authorities and regional organizations. The solutions will have a positive impact on the enhancement of the quality of public spaces, attractive social activities and of a conceptual link – residentialization.

  9. SAFEGUARDS ENVELOPE: PREVIOUS WORK AND EXAMPLES

    Energy Technology Data Exchange (ETDEWEB)

    Richard Metcalf; Aaron Bevill; William Charlton; Robert Bean

    2008-07-01

    The future expansion of nuclear power will require not just electricity production but fuel cycle facilities such as fuel fabrication and reprocessing plants. As large reprocessing facilities are built in various states, they must be built and operated in a manner to minimize the risk of nuclear proliferation. Process monitoring has returned to the spotlight as an added measure that can increase confidence in the safeguards of special nuclear material (SNM). Process monitoring can be demonstrated to lengthen the allowable inventory period by reducing accountancy requirements, and to reduce the false positive indications. The next logical step is the creation of a Safeguards Envelope, a set of operational parameters and models to maximize anomaly detection and inventory period by process monitoring while minimizing operator impact and false positive rates. A brief example of a rudimentary Safeguards Envelope is presented, and shown to detect synthetic diversions overlaying a measured processing plant data set. This demonstration Safeguards Envelope is shown to increase the confidence that no SNM has been diverted with minimal operator impact, even though it is based on an information sparse environment. While the foundation on which a full Safeguards Envelope can be built has been presented in historical demonstrations of process monitoring, several requirements remain yet unfulfilled. Future work will require reprocessing plant transient models, inclusion of “non-traditional” operating data, and exploration of new methods of identifying subtle events in transient processes.

  10. Digital signal processing with Matlab examples

    CERN Document Server

    Giron-Sierra, Jose Maria

    2017-01-01

    This is the first volume in a trilogy on modern Signal Processing. The three books provide a concise exposition of signal processing topics, and a guide to support individual practical exploration based on MATLAB programs. This book includes MATLAB codes to illustrate each of the main steps of the theory, offering a self-contained guide suitable for independent study. The code is embedded in the text, helping readers to put into practice the ideas and methods discussed. The book is divided into three parts, the first of which introduces readers to periodic and non-periodic signals. The second part is devoted to filtering, which is an important and commonly used application. The third part addresses more advanced topics, including the analysis of real-world non-stationary signals and data, e.g. structural fatigue, earthquakes, electro-encephalograms, birdsong, etc. The book’s last chapter focuses on modulation, an example of the intentional use of non-stationary signals.

  11. Application Examples for Handle System Usage

    Science.gov (United States)

    Toussaint, F.; Weigel, T.; Thiemann, H.; Höck, H.; Stockhause, M.; Lautenschlager, M.

    2012-12-01

    Besides the well-known DOI (Digital Object Identifiers) as a special form of Handles that resolve to scientific publications there are various other applications in use. Others perhaps are just not yet. We present some examples for the existing ones and some ideas for the future. The national German project C3-Grid provides a framework to implement a first solution for provenance tracing and explore unforeseen implications. Though project-specific, the high-level architecture is generic and represents well a common notion of data derivation. Users select one or many input datasets and a workflow software module (an agent in this context) to execute on the data. The output data is deposited in a repository to be delivered to the user. All data is accompanied by an XML metadata document. All input and output data, metadata and the workflow module receive Handles and are linked together to establish a directed acyclic graph of derived data objects and involved agents. Data that has been modified by a workflow module is linked to its predecessor data and the workflow module involved. Version control systems such as svn or git provide Internet access to software repositories using URLs. To refer to a specific state of the source code of for instance a C3 workflow module, it is sufficient to reference the URL to the svn revision or git hash. In consequence, individual revisions and the repository as a whole receive PIDs. Moreover, the revision specific PIDs are linked to their respective predecessors and become part of the provenance graph. Another example for usage of PIDs in a current major project is given in EUDAT (European Data Infrastructure) which will link scientific data of several research communities together. In many fields it is necessary to provide data objects at multiple locations for a variety of applications. To ensure consistency, not only the master of a data object but also its copies shall be provided with a PID. To verify transaction safety and to

  12. Sustainable Oceanographic Vessels - Setting an Example

    Science.gov (United States)

    van Leer, J. C.

    2009-12-01

    In response to climate change, global warming and post “peak oil” fuel scarcity, the oceanographic community should consider reducing its carbon foot print. Why should scientists operate inefficient vessels while lecturing the general public on the need to reduce CO2 emissions? We have already seen curtailment of ship schedules and ship lay-ups, due in part to rising fuel costs, following $140/barrel crude oil. When the global recession ends, upward pressure on oil prices will again commence. Who can forecast how high fuel prices may ultimately rise during the typical 25-30 year lifetime of a research vessel? Are we to curtail future work at sea when oceanic climate research is becoming ever more important? A catamaran research vessel has been designed which can be electrically propelled from by a combination of high efficiency generators, photovoltaic panels and/or sails. Sail produced power is transformed with propellers and motor/generators into electric power which is stored in battery banks. This vessel could operate as the first true hybrid oceanographic research vessel. It could even continue operations without fuel in cases of a severe fuel shortage or fueling denial. Since the power produced by any water turbine increases with the cube of the velocity flowing over its propeller, the low fluid friction and high stability of a catamaran, with reasonably slender hulls, provide an important boost to efficient hybrid operation. The author has chartered a 42’ hybrid catamaran sailboat and found it efficient and extremely easy to operate and control. A 79’ motor sailing catamaran research vessel by Lock Crowther Designs will be presented as one example of a sustainable research vessel with excellent speed and sea-keeping. A center well makes operation as a small drilling/coring ship for coastal climate investigation possible. The center well also supports a host of remote sensing and robotic gear handling capabilities.

  13. Examples of geoscientists women in France

    Science.gov (United States)

    Mognard-Campbel, N.; Cazenave, A.

    2004-12-01

    Although the presence of women in sciences has been increasing in the past few decades in Europe, it remains incredibly low at the top levels. Recent statistics from the European Commission indicate that now women represent 50 percent of first degree students in many countries. However, the proportion of women at each stage of the scientific career decreases almost linearly, reaching less than 10 percent at the highest level jobs. From my own experience, I don't think that this results from sexism nor discrimination. Rather, I think that this is a result of complex cultural factors making women subconsciously persuaded that top level jobs are destined to male scientists only. Many women scientists drop the idea of playing a role at high-level research, considering it as a way of exerting power (a matter reserved to men). Others give up the possibility of combining childcare and high level commitments in research. And too many (married women) still find only natural to sacrifice their own scientific ambitions to the benefit of their spouse's career. Examples of personal experiences in the French research system are presented. We discuss some choices of prioritizing scientific productivity and expertise against hierarchical responsibilities and of keeping a satisfactory balance between family demand and research involvement. This is somewhat facilitated by the French system, which provides substantial support to women's work (nurseries, recreation centers during school holidays, etc.). As a conclusion, we think that the most promising way of increasing the number of women at top levels in research is through education and mentality evolution.

  14. From Concrete Examples to Abstract Relations: The Rostrolateral Prefrontal Cortex Integrates Novel Examples into Relational Categories.

    Science.gov (United States)

    Davis, Tyler; Goldwater, Micah; Giron, Josue

    2017-04-01

    The ability to form relational categories for objects that share few features in common is a hallmark of human cognition. For example, anything that can play a preventative role, from a boulder to poverty, can be a "barrier." However, neurobiological research has focused solely on how people acquire categories defined by features. The present functional magnetic resonance imaging study examines how relational and feature-based category learning compare in well-matched learning tasks. Using a computational model-based approach, we observed a cluster in left rostrolateral prefrontal cortex (rlPFC) that tracked quantitative predictions for the representational distance between test and training examples during relational categorization. Contrastingly, medial and dorsal PFC exhibited graded activation that tracked decision evidence during both feature-based and relational categorization. The results suggest that rlPFC computes an alignment signal that is critical for integrating novel examples during relational categorization whereas other PFC regions support more general decision functions. © The Author 2016. Published by Oxford University Press. All rights reserved. For Permissions, please e-mail: journals.permissions@oup.com.

  15. EXAMINATION OF ETHICAL PROCUREMENT THROUGH ENTERPRISE EXAMPLES

    Directory of Open Access Journals (Sweden)

    Beáta Sz. G. Pató

    2016-06-01

    Full Text Available Today’s business world is affected by the 21st century’s processes, like globalization, fluent online attendance, digitalization and their direct consequence depersonalisation. The authors are motivated by these facts and want to vivify the „old fashioned” correct business models and find the indispensable parameter of the well-functioning economy, in one word today’s equivalent of „honorable gentlemen”. The assumed key to success could be useful for the for-profit sector because not only profit can be the impelling in the professional life of a corporation. The human value added is one of the most important keystones of thrift. The aim to establish a balance between economic and ethical behaviour of corporations has been enounced serving the interest of all participants, consumers, corporations and society. The before natural thought values seem nowadays to turn into something different or to be neglected. As a consequence the question has been raised, if society has the force to establish and improve Ethics, will it be able to destroy it as well?! The main focus of the research is therefore the mapping of criteria and marks which belong to on the competitive market successful enterprises whose procurement decisions are ethical as well. These marks can be formal or informal. The results of the research show well that there are parameters of a company, for example, a code of conduct within guidelines concerning the procurement or procedure manuals in which also ethical issues appear in a formal way. From another point of view there are informal signs like customs arising from the corporate culture, daily routine or just human behaviour and convincement of the management and procurement employees that also support the ethical performance of the company. The results of the research can serve as best practice for the other enterprises too in their daily appearance on the market. Particularly in that area the company’s most important

  16. "Thinking is a Thing: Hegel's use of Examples"

    DEFF Research Database (Denmark)

    Hansen, Brian Benjamin

    What is the act of giving an example? What kind of thinking is done when a concept is exemplified? What if examples not only deliver less, but also sometimes more, than what their concepts promised? What if there in this way is a certain materiality of the example, a certain “excess of stuff” con...... climax of classical philosophy, namely in Hegel’s use of examples, especially in his masterpiece The Phenomenology of Spirit....

  17. Example book; Miro V3.0: fiche de cas

    Energy Technology Data Exchange (ETDEWEB)

    Donnat, Ph.; Treimany, C.; Gouedard, C.; Morice, O

    1998-06-01

    This document presents some examples which were used for debugging the code. It seemed useful to write these examples onto a book to be sure the code would not regret; to give warranties for the code`s functionality; to propose some examples to illustrate the possibilities and the limits of Miro. (author) 26 refs.

  18. A Qualitative Research on Example Generation Capabilities of University Students

    Science.gov (United States)

    Saglam, Yasemin; Dost, Senol

    2016-01-01

    Examples which are used in exploring a procedure or comprehending/concretizing a mathematical concept are powerful teaching tools. Generating examples other than conventional ones is both a means for research and a pedagogical method. The aim of this study is to determine the transition process between example generation strategies, and the…

  19. Parasites of domestic and wild animals in South Africa. XLVIII . Ticks (Acari: Ixodidae infesting domestic cats and wild felids in southern Africa

    Directory of Open Access Journals (Sweden)

    Ivan G. Horak

    2010-08-01

    Full Text Available Ticks collected from domestic cats (Felis catus, cheetahs (Acinonyx jubatus,caracals (Caracal caracal, African wild cats (Felis lybica, black-footed cats (Felis nigripes, a serval (Leptailurus serval, lions(Panthera leo, and leopards (Panthera pardus were identified and counted. Thirteen species of ixodid ticks and one argasid tick were identified from domestic cats and 17 species of ixodid ticks from wild felids. The domestic cats and wild felids harboured 11 ixodid species in common. The adults of Haemaphysalis elliptica, the most abundant tick species infesting cats and wild felids, were most numerous on a domestic cat in late winter and in mid-summer, during 2 consecutive years. The recorded geographic distribution of the recently described Haemaphysalis colesbergensis, a parasite of cats and caracals, was extended by 2 new locality records in the Northern Cape Province,South Africa.

  20. From Airborne EM to Geology, some examples

    Science.gov (United States)

    Gunnink, Jan

    2014-05-01

    Introduction Airborne Electro Magnetics (AEM) provide a model of the 3-dimensional distribution of resistivity of the subsurface. These resistivity models were used for delineating geological structures (e.g. Buried Valleys and salt domes) and for geohydrological modeling of aquifers (sandy sediments) and aquitards (clayey sediments). Most of the interpretation of the AEM has been carried out manually, by interpretation of 2 and 3-dimensional resistivity models into geological units by a skilled geologists / geophysicist. The manual interpretation is tiresome, takes a long time and is prone to subjective choices of the interpreter. Therefore, semi-automatic interpretation of AEM resistivity models into geological units is a recent research topic. Two examples are presented that show how resistivity, as obtained from AEM, can be "converted" to useful geological / geohydrolocal models. Statistical relation between borehole data and resistivity In the northeastern part of the Netherlands, the 3D distribution of clay deposits - formed in a glacio-lacustrine environment with buried glacial valleys - was modelled. Boreholes with description of lithology, were linked to AEM resistivity. First, 1D AEM resistivity models from each individual sounding were interpolated to cover the entire study area, resulting in a 3-dimensional model of resistivity. For each interval of clay and sand in the boreholes, the corresponding resistivity was extracted from the 3D resistivity model. Linear regression was used to link the clay and non-clay proportion in each borehole interval to the Ln(resistivity). This regression is then used to "convert" the 3D resistivity model into proportion of clay for the entire study area. This so-called "soft information" is combined with the "hard data" (boreholes) to model the proportion of clay for the entire study area using geostatistical simulation techniques (Sequential Indicator Simulation with collocated co-kriging). 100 realizations of the 3

  1. Unsupervised learning in neurodynamics using example-interaction approach

    Science.gov (United States)

    Zak, Michail

    1989-01-01

    A new concept for unsupervised learning based upon examples introduced to the neural network is proposed. Each example is considered as an interpolation node of the velocity field in the phase space. The velocities at these nodes are selected such that all the streamlines diverge to an attracting set imbedded in the subspace occupied by the cluster of examples. The synaptic interconnections are found from the minimization of the strength energy, while the node velocities play the role of constraints.

  2. Collaborative Learning in Practice: Examples from Natural Resource ...

    International Development Research Centre (IDRC) Digital Library (Canada)

    Collaborative Learning in Practice: Examples from Natural Resource Management in Asia. Book cover Collaborative Learning in Practice: Examples from Natural Resource Management in Asia. Directeur(s) : Ronnie Vernooy. Maison(s) d'édition : Cambridge University Press India, IDRC. 1 décembre 2010. ISBN :.

  3. Can Using Human Examples Facilitate Learning Mendelian Genetics Concepts?

    Science.gov (United States)

    Moore, John M.; And Others

    1992-01-01

    Reports an experimental study of 80 ninth grade biology students randomly assigned to treatment and control groups to determine whether the use of human examples in instructional strategies on Mendelian genetics increases acquisition and retention of genetics concepts. Results indicate that use of human examples in contrast to traditional examples…

  4. Translation: an example from ancient Chinese to modern Chinese

    NARCIS (Netherlands)

    Liu, X; Hoede, C.

    2002-01-01

    In this paper, we gave an idea of translation by means of knowledge graph theory from ancient Chinese to modern Chinese, by using an example story. Actually, we give the details of the method of translation from ancient Chinese to modern Chinese step by step as carried out by hand. From the example,

  5. Leading by Example: The Case of Leader OCB

    Science.gov (United States)

    Yaffe, Tal; Kark, Ronit

    2011-01-01

    The importance of leading by personal example or role modeling for effective leadership has been recognized in many leadership theories. However, leaders' ability to influence group behavior through exemplary behavior has received little attention in empirical work. This study explores leading by example through theoretical development and…

  6. Building a data warehouse with examples in SQL server

    CERN Document Server

    Rainardi, Vincent

    2008-01-01

    ""Building a Data Warehouse: With Examples in SQL Server"" describes how to build a data warehouse completely from scratch and shows practical examples on how to do it. Author Rainardi also describes some practical issues that developers are likely to encounter in their first data warehousing project, along with solutions and advice.

  7. Child-Specific Exposure Scenarios Examples (Final Report)

    Science.gov (United States)

    EPA announced the availability of the final report, Child-Specific Exposure Scenarios Examples. This report is intended to be a companion document to the Exposure Factors Handbook (U.S. EPA 2011). The example scenarios were compiled from questions and inquiries r...

  8. Illustrative Examples in a Bilingual Decoding Dictionary: An (Un ...

    African Journals Online (AJOL)

    user

    whose purpose is to supplement dictionary equivalent(s) in the grammatical, lexical, semantic and contextual senses. Apart from ... well as grammatical changes in the translation of examples demand not only a high level of knowl- edge of both ... example by Arab lexicographers since the 8th century or by Greek and Latin.

  9. R statistical application development by example : beginner's guide

    CERN Document Server

    Tattar, Narayanachart Prabhanjan

    2013-01-01

    Full of screenshots and examples, this Beginner's Guide by Example will teach you practically everything you need to know about R statistical application development from scratch. You will begin learning the first concepts of statistics in R which is vital in this fast paced era and it is also a bargain as you do not need to do a preliminary course on the subject.

  10. Adaptive tracking control of nonholonomic systems: an example

    NARCIS (Netherlands)

    Lefeber, A.A.J.; Nijmeijer, Henk

    1999-01-01

    We study an example of an adaptive (state) tracking control problem for a four-wheel mobile robot, as it is an illustrative example of the general adaptive state-feedback tracking control problem. It turns out that formulating the adaptive state-feedback tracking control problem is not

  11. Toward an Instructionally Oriented Theory of Example-Based Learning

    Science.gov (United States)

    Renkl, Alexander

    2014-01-01

    Learning from examples is a very effective means of initial cognitive skill acquisition. There is an enormous body of research on the specifics of this learning method. This article presents an instructionally oriented theory of example-based learning that integrates theoretical assumptions and findings from three research areas: learning from…

  12. 77 FR 23429 - Examples of Program-Related Investments

    Science.gov (United States)

    2012-04-19

    ... additional PRI examples that reflect current investment practices and illustrate certain principles... Internal Revenue Service 26 CFR Part 53 RIN 1545-BK76 Examples of Program-Related Investments AGENCY... contains proposed regulations that provide guidance to private foundations on program-related investments...

  13. Dimensional analysis examples of the use of symmetry

    CERN Document Server

    Hornung, Hans G

    2006-01-01

    Derived from a course in fluid mechanics, this text for advanced undergraduates and beginning graduate students employs symmetry arguments to demonstrate the principles of dimensional analysis. The examples provided illustrate the effectiveness of symmetry arguments in obtaining the mathematical form of the functions yielded by dimensional analysis. Students will find these methods applicable to a wide field of interests.After discussing several examples of method, the text examines pipe flow, material properties, gasdynamical examples, body in nonuniform flow, and turbulent flow. Additional t

  14. FPGA prototyping by Verilog examples Xilinx Spartan-3 version

    CERN Document Server

    Chu, Pong P

    2008-01-01

    FPGA Prototyping Using Verilog Examples will provide you with a hands-on introduction to Verilog synthesis and FPGA programming through a "learn by doing" approach. By following the clear, easy-to-understand templates for code development and the numerous practical examples, you can quickly develop and simulate a sophisticated digital circuit, realize it on a prototyping device, and verify the operation of its physical implementation. This introductory text that will provide you with a solid foundation, instill confidence with rigorous examples for complex systems and prepare you for future development tasks.

  15. How examples may (and may not) constrain creativity.

    Science.gov (United States)

    Marsh, R L; Landau, J D; Hicks, J L

    1996-09-01

    Three experiments were performed to test Smith, Ward, and Schumacher's (1993) conformity hypothesis-that people's ideas will conform to examples they are shown in a creative generation task. Conformity was observed in all three experiments; participants tended to incorporate critical features of experimenter-provided examples. However, examination of total output, elaborateness of design, and the noncritical features did not confirm that the conformity effect constrained creative output in any of the three experiments. Increasing the number of examples increased the conformity effect (Experiment 1). Examples that covaried features that are naturally uncorrelated in the real world led to a greater subjective rating of creativity (Experiment 2). A delay between presentation and test increased conformity (Experiment 3), just as models of inadvertent plagiarism would predict. The explanatory power of theoretical accounts such as activation, retrieval blocking, structured imagination, and category abstraction are evaluated.

  16. Entrepreneurial orientation and practice: three case examples of ...

    African Journals Online (AJOL)

    Erna Kinsey

    Case examples of three successful entrepreneurial historically disad- vantaged primary schools are presented. Results indicate novel and innovative ventures undertaken at these schools and clearly indicate that some historically disadvantaged schools are indeed entrepreneurially oriented. Introduction and background.

  17. Content based image retrieval using unclean positive examples.

    Science.gov (United States)

    Zhang, Jun; Ye, Lei

    2009-10-01

    Conventional content-based image retrieval (CBIR) schemes employing relevance feedback may suffer from some problems in the practical applications. First, most ordinary users would like to complete their search in a single interaction especially on the web. Second, it is time consuming and difficult to label a lot of negative examples with sufficient variety. Third, ordinary users may introduce some noisy examples into the query. This correspondence explores solutions to a new issue that image retrieval using unclean positive examples. In the proposed scheme, multiple feature distances are combined to obtain image similarity using classification technology. To handle the noisy positive examples, a new two-step strategy is proposed by incorporating the methods of data cleaning and noise tolerant classifier. The extensive experiments carried out on two different real image collections validate the effectiveness of the proposed scheme.

  18. Teaching assistants' beliefs regarding example solutions in introductory physics

    CERN Document Server

    Lin, Shih-Yin; Mamudi, William; Singh, Chandralekha; Yerushalmi, Edit

    2016-01-01

    As part of a larger study to understand instructors' considerations regarding the learning and teaching of problem solving in an introductory physics course, we investigated beliefs of first-year graduate teaching assistants (TAs) regarding the use of example solutions in introductory physics. In particular, we examine how the goal of promoting expert-like problem solving is manifested in the considerations of graduate TAs choices of example solutions. Twenty-four first-year graduate TAs were asked to discuss their goals for presenting example solutions to students. They were also provided with different example solutions and asked to discuss their preferences for prominent solution features. TAs' awareness, preferences and actual practices related to solution features were examined in light of recommendations from the literature for the modeling of expert-like problem solving approaches. The study concludes that the goal of helping students develop an expert-like problem solving approach underlies many TAs' ...

  19. Physics with illustrative examples from medicine and biology

    CERN Document Server

    Benedek, George B

    Physics: with illustrative examples from medicine and biology is a three-volume set of textbooks in introductory physics written at the calculus level and designed primarily for students with career objectives in the life sciences.

  20. Salt marsh vegetation: examples from the Tijuana estuary

    National Research Council Canada - National Science Library

    Zedler, J.B

    Using the Tijuana Estuary in southern California as an example, this booklet describes salt marsh vegetation and explains how marsh plants are able to tolerate the stresses of their variable environment...

  1. Coevolution in the Galapagos: An Example for the Biology Classroom.

    Science.gov (United States)

    Biggs, Alton L.

    1990-01-01

    Several examples of coevolution which can be used in biology classes are presented. Discussed are evolutionary processes in general, giant cacti, and reptile and cacti association. The effects of human interference are briefly described. (CW)

  2. An example of strategic market game with infinitely many commodities

    OpenAIRE

    Tonin, Simone

    2013-01-01

    This short paper shows in an example of strategic market game that the CournotNash equilibrium converges to the Walras equilibrium, even in the case of an exchange economy with infinitely many commodities.

  3. Two Examples of Application of TOPSIS to Decision Making Problems

    Directory of Open Access Journals (Sweden)

    KROHLING, R. A.

    2011-12-01

    Full Text Available In this work, we apply the Technique to Order Preference by Similarity to Ideal Solution (TOPSIS to two case studies. The first example is concerned with the evaluation of the best response alternatives in case of accidental oil spill in the sea. The second example considers the rental evaluation of residential properties. Simulations results are promising and show the feasibility of the technique.

  4. Examples of digital activites in tomorrow's Science classroom

    Science.gov (United States)

    Lardé, Arnaud

    2017-04-01

    Nowadays, Digital skills are very important for several reasons; First, almost any studies or works will need to master these skills; then, they are a new way to stimulate and motivate the pupils; You will find here examples of apps, ideas with tablets to use in your class keeping in mind that the most important is not to teach FOR the digital but BY the digital. Examples that will be exposed: - plickers - anatomy 4d - QR cod - edmodo - skitch

  5. Space physics education via examples in the undergraduate physics curriculum

    Science.gov (United States)

    Martin, R.; Holland, D. L.

    2011-12-01

    The field of space physics is rich with examples of basic physics and analysis techniques, yet it is rarely seen in physics courses or textbooks. As space physicists in an undergraduate physics department we like to use research to inform teaching, and we find that students respond well to examples from magnetospheric science. While we integrate examples into general education courses as well, this talk will focus on physics major courses. Space physics examples are typically selected to illustrate a particular concept or method taught in the course. Four examples will be discussed, from an introductory electricity and magnetism course, a mechanics/nonlinear dynamics course, a computational physics course, and a plasma physics course. Space physics provides examples of many concepts from introductory E&M, including the application of Faraday's law to terrestrial magnetic storm effects and the use of the basic motion of charged particles as a springboard to discussion of the inner magnetosphere and the aurora. In the mechanics and nonlinear dynamics courses, the motion of charged particles in a magnetotail current sheet magnetic field is treated as a Newtonian dynamical system, illustrating the Poincaré surface-of-section technique, the partitioning of phase space, and the KAM theorem. Neural network time series analysis of AE data is used as an example in the computational physics course. Finally, among several examples, current sheet particle dynamics is utilized in the plasma physics course to illustrate the notion of adiabatic/guiding center motion and the breakdown of the adiabatic approximation. We will present short descriptions of our pedagogy and student assignments in this "backdoor" method of space physics education.

  6. Bionics by examples 250 scenarios from classical to modern times

    CERN Document Server

    Nachtigall, Werner

    2015-01-01

    Bionics means learning from the nature for the development of technology. The science of "bionics" itself is classified into several sections, from materials and structures over procedures and processes until evolution and optimization. Not all these areas, or only a few, are really known in the public and also in scientific literature. This includes the Lotus-effect, converted to the contamination-reduction of fassades and the shark-shed-effect, converted to the  resistance-reduction of airplanes. However, there are hundreds of highly interesting examples that contain the transformation of principles of the nature into technology. From the large number of these examples, 250 were selected for the present book according to "prehistory", "early-history", "classic" and "modern time". Most examples are new. Every example includes a printed page in a homogeneous arrangement. The examples from the field "modern time" are joint in blocks corresponding to the sub-disciplines of bionics.

  7. Active learning in the presence of unlabelable examples

    Science.gov (United States)

    Mazzoni, Dominic; Wagstaff, Kiri

    2004-01-01

    We propose a new active learning framework where the expert labeler is allowed to decline to label any example. This may be necessary because the true label is unknown or because the example belongs to a class that is not part of the real training problem. We show that within this framework, popular active learning algorithms (such as Simple) may perform worse than random selection because they make so many queries to the unlabelable class. We present a method by which any active learning algorithm can be modified to avoid unlabelable examples by training a second classifier to distinguish between the labelable and unlabelable classes. We also demonstrate the effectiveness of the method on two benchmark data sets and a real-world problem.

  8. Birkhoff's Theorem from a geometric perspective: A simple example

    Directory of Open Access Journals (Sweden)

    F. William Lawvere

    2016-02-01

    Full Text Available ‎From Hilbert's theorem of zeroes‎, ‎and from Noether's ideal theory‎, ‎Birkhoff derived certain algebraic concepts (as explained by Tholen that have a dual significance in general toposes‎, ‎similar to their role in the original examples of algebraic geometry‎. ‎I will describe a simple example that illustrates some of the aspects of this relationship‎. The dualization from algebra to geometry in the basic Grothendieck spirit can be accomplished (without intervention of topological spaces by the following method‎, ‎known as Isbell conjugacy.

  9. Participatory Publics - Examples from Higher Education in Fragile Democracies

    DEFF Research Database (Denmark)

    Zander, Pär-Ola

    This paper presents two cases of local communities, defined by being constituted by students in higher education in polities that have a relatively short tradition of democracy. The first case is a college in Bhutan. The second example is a Madrasa in Bangladesh, a privately run institution...... with theological profile, and at the centre of attention due to national social unrest. The examples are provided as a base for thinking on how social media can be redesigned to support local democratic activity. The paper concludes by proposing some aspects of the local communities that are intriguing...... but challenging to design for....

  10. SOME EXAMPLES OF APPLIED SYSTEMS WITH SPEECH INTERFACE

    Directory of Open Access Journals (Sweden)

    V. A. Zhitko

    2017-01-01

    Full Text Available Three examples of applied systems with a speech interface are considered in the article. The first two of these provide the end user with the opportunity to ask verbally the question and to hear the response from the system, creating an addition to the traditional I / O via the keyboard and computer screen. The third example, the «IntonTrainer» system, provides the user with the possibility of voice interaction and is designed for in-depth self-learning of the intonation of oral speech.

  11. Learning from Examples versus Verbal Directions in Mathematical Problem Solving

    Science.gov (United States)

    Lee, Hee Seung; Fincham, Jon M.; Anderson, John R.

    2015-01-01

    This event-related fMRI study investigated the differences between learning from examples and learning from verbal directions in mathematical problem solving and how these instruction types affect the activity of relevant brain regions during instruction and solution periods within problem-solving trials. We identified distinct neural signatures…

  12. Examples of Important Ongoing Research Topics for Offshore Wind Energy

    DEFF Research Database (Denmark)

    Hansen, Martin Otto Laver; Bredmose, Henrik; Schløer, Signe

    2011-01-01

    The aim of the paper is to address some challenges related to offshore wind energy. A first example shows some results from an ongoing project on accurate computation of wave loads on monopole foundations. The effects of wave nonlinearity and bottom slope are examined and detailed CFD computations...

  13. 29 CFR 541.203 - Administrative exemption examples.

    Science.gov (United States)

    2010-07-01

    ... 29 Labor 3 2010-07-01 2010-07-01 false Administrative exemption examples. 541.203 Section 541.203 Labor Regulations Relating to Labor (Continued) WAGE AND HOUR DIVISION, DEPARTMENT OF LABOR REGULATIONS... productivity improvements) generally meets the duties requirements for the administrative exemption, even if...

  14. Some examples of tactical crime mapping in South Africa.

    CSIR Research Space (South Africa)

    Cooper, Anthony K

    2002-01-01

    Full Text Available This paper presents a few examples of tactical crime mapping and analysis done by the Council for Scientific and Industrial Research (CSIR) and the South African Police Service (SAPS). In these cases, the police had already arrested the suspects...

  15. Developing Transferable Skills: Some Examples from Geomorphology Teaching.

    Science.gov (United States)

    Mottershead, Derek; Suggitt, Steve

    1996-01-01

    Demonstrates how the development of transferable skills can be promoted as a matter of policy in undergraduate geography programs and implemented throughout individual classes. Defines transferable skills as skills of a widely applicable nature independent of the disciplinary context. Presents two examples of transferable skill development in…

  16. Qualitative genetics - examples from soybean and other crops

    Science.gov (United States)

    Qualitative genetics, also known as Mendelian genetics or transmission genetics, refers to those genetic traits that have a distinct appearance (phenotype) and are controlled by one or few genes. Examples of qualitative genetics include response to abiotic and biotic stresses, and anatomical, morpho...

  17. Learning from video modeling examples: Does gender matter?

    NARCIS (Netherlands)

    Hoogerheide, V.; Loyens, S.M.M.; van Gog, T.

    2016-01-01

    Online learning from video modeling examples, in which a human model demonstrates and explains how to perform a learning task, is an effective instructional method that is increasingly used nowadays. However, model characteristics such as gender tend to differ across videos, and the model-observer

  18. Mathematics as a constructive activity learners generating examples

    CERN Document Server

    Watson, Anne

    2005-01-01

    Explains and demonstrates the role of examples in the teaching and learning of mathematics, and their place in mathematics generally at all levels. Includes a combination of exercises for the reader, practical applications for teaching, and solid scholarly grounding.

  19. A concrete example of a Personal Network architecture

    NARCIS (Netherlands)

    Hartog, F.T.H. den; Peeters, M.E.

    2006-01-01

    A Personal Network (PN) is created when the various private networks of a single user are always seamlessly interconnected, despite the mobility of the user. To realize this vision we have designed an architecture of a simple, concrete example of such a PN. It consists of just a home network and a

  20. Singing of Neoconocephalus robustus as an example of ...

    Indian Academy of Sciences (India)

    PRAKASH KUMAR

    instructive insights and foster the understanding of acoustic communication among insects. [Benko T P and Perc M 2007 Singing of Neoconocephalus robustus as an example ..... disorders with methods from nonlinear dynamics; J. Speech. Hear. Res. 37 1008–1019. Kantz H 1994 A robust method to estimate the maximal ...

  1. The role of images in historical illumination: the Ppobo example ...

    African Journals Online (AJOL)

    This paper examines the role of images in historical illumination. Specifically, it focuses on art as an instrument of communication, drawing and pictures as rich historical sources indispensable to the African historian. Using examples from. Opobo, it shows how these sources illuminate Opobo History, noting that images

  2. Statistics by Example, Exploring Data, Teachers' Commentary and Solutions Manual.

    Science.gov (United States)

    Zelinka, Martha; Sutherland, Michael

    Part I of the teachers' commentary for "Exploring Data" includes a brief description of demands on the reader in terms of reading vocabulary and mathematical skills and comprehension, lists the substantive areas covered by the examples, suggests ways in which the pamphlet might be used in the classroom, and discusses background information for the…

  3. Transforms and applications primer for engineers with examples and Matlab

    CERN Document Server

    Poularikas, Alexander D

    2010-01-01

    Suitable for engineering and science students, professionals, and those working on problems involving transforms, this title provides a large number of examples to explain the use of transforms in different areas, including circuit analysis, differential equations, signals and systems, and mechanical vibrations.

  4. Graph Theory to Pure Mathematics: Some Illustrative Examples

    Indian Academy of Sciences (India)

    Home; Journals; Resonance – Journal of Science Education; Volume 10; Issue 1. Graph Theory to Pure Mathematics: Some Illustrative Examples. V Yegnanarayanan. General Article Volume 10 Issue 1 January 2005 pp 50-59. Fulltext. Click here to view fulltext PDF. Permanent link:

  5. Strategy Guideline: Quality Management in Existing Homes - Cantilever Floor Example

    Energy Technology Data Exchange (ETDEWEB)

    Taggart, J. [NAHB Research Center Industry Partnership, Upper Marlboro, MD (United States); Sikora, J. [NAHB Research Center Industry Partnership, Upper Marlboro, MD (United States); Wiehagen, J. [NAHB Research Center Industry Partnership, Upper Marlboro, MD (United States); Wood, A. [NAHB Research Center Industry Partnership, Upper Marlboro, MD (United States)

    2011-12-01

    This guideline is designed to highlight the QA process that can be applied to any residential building retrofit activity. The cantilevered floor retrofit detailed in this guideline is included only to provide an actual retrofit example to better illustrate the QA activities being presented.

  6. Self-clocked sequential circuits: - a design example | Aghdasi ...

    African Journals Online (AJOL)

    This paper uses a design methodology for the State variable toggling through data driven clocks to implement a Direct Memory Access Controller (DMAC) as a design example. The design is simulated on software and also implemented using discrete hardware components. The methodology can be extended to parallel ...

  7. The Economics of Soil Erosion: Theory, Methodology and Examples

    OpenAIRE

    Edward B. Barbier

    1996-01-01

    The purpose of the following paper is to provide an overview of an economic analysis of soil erosion, concentrating particularly on explaining the farm-level economics of soil erosion and discussing with examples the appropriate methodology for measuring on and off-site costs.

  8. Examples on cold forged aluminium components in automotive industry

    DEFF Research Database (Denmark)

    Bay, Niels; Kolsgaard, A.

    2000-01-01

    The present paper describes the possibilites of applying cold forging for manufacturing of light weight components in aluminium. A short description of the basic cold forming processes forms the basis for describing the great variety in design of cold forged components. Examples are mainly taken ...... from automotive industry but in a few cases also from other industrial sectors to show the possibilities....

  9. Psychological Factors Affecting Medical Students' Learning with Erroneous Worked Examples

    Science.gov (United States)

    Klopp, Eric; Stark, Robin; Kopp, Veronika; Fischer, Martin R.

    2013-01-01

    The acquisition of diagnostic competence is seen as a major goal during the course of study in medicine. One innovative method to foster this goal is problem-based learning with erroneous worked examples provided in a computer learning environment. The present study explores the relationship of attitudinal, emotional and cognitive factors for…

  10. An Example of Bayesian Inference in Thermal Sciences

    Indian Academy of Sciences (India)

    Admin

    An Example of Bayesian Inference in Thermal Sciences. C Balaji and T ... G e- netic A lgorithm s (G A ) w ork on the basis of natural selection and m im ic the process of biological evolution. P robabilistic rules are used to choose parents from an ..... Including all the database points wastes com putation tim e in calculating the.

  11. Dialogic Pedagogy in Creative Practice: A Conversation in Examples

    Science.gov (United States)

    Archer, Carol; Kelen, Christopher

    2015-01-01

    This paper surveys examples of dialogic pedagogy in creative practices in the areas of Visual Studies and Creative Writing at universities in Hong Kong and Macao. The authors describe their own participant-observer experience of evolving pedagogy for creative practice through on-site and remote interaction, with colleagues and with and between…

  12. Using Sports to Teach Geography: Examples from Kansas City

    Science.gov (United States)

    DeChano, Lisa M.; Shelley, Fred M.

    2004-01-01

    This paper illustrates how sports can be used to teach geographic concepts, using illustrative examples from the Kansas City area. Given the global popularity of sport and its impacts and links to environment, economy, and culture, it is surprising that more attention has not been paid to sport as a vehicle for the conceptualization and teaching…

  13. From Sensor Data to Animal Behaviour: An Oystercatcher Example

    NARCIS (Netherlands)

    Shamoun-Baranes, J.; Bom, R.; van Loon, E.E.; Ens, B.J.; Oosterbeek, K.; Bouten, W.

    2012-01-01

    Animal-borne sensors enable researchers to remotely track animals, their physiological state and body movements. Accelerometers, for example, have been used in several studies to measure body movement, posture, and energy expenditure, although predominantly in marine animals. In many studies,

  14. From sensor data to animal behaviour: an oystercatcher example

    NARCIS (Netherlands)

    Shamoun-Baranes, J.; Bom, R.; van Loon, E.E.; Ens, B.J.; Oosterbeek, K.; Bouten, W.

    2012-01-01

    Animal-borne sensors enable researchers to remotely track animals, their physiological state and body movements. Accelerometers, for example, have been used in several studies to measure body movement, posture, and energy expenditure, although predominantly in marine animals. In many studies,

  15. Territoriality: the example of the White Rhinoceros | Owen-Smith ...

    African Journals Online (AJOL)

    The PDF file you selected should load here if your Web browser has a PDF reader plug-in installed (for example, a recent version of Adobe Acrobat Reader). If you would like more information about how to print, save, and work with PDFs, Highwire Press provides a helpful Frequently Asked Questions about PDFs.

  16. [The plague and the art of painting: some examples].

    Science.gov (United States)

    Dequeker, J

    1999-01-01

    The author gives four examples of pictures representing the plague: "The Plague of Asdod" by Nicolas Poussin, a picture of Saint Roch by the Master of Frankfort, "Saint Roch Interceding for the Plague-stricken" by Peter Paul Rubens and "The Sisters of Saint Elisabeth Hospital in Antwerp and the Works of Mercy" by Jacob Jordaens.

  17. Some examples of tactical crime mapping in South Africa

    CSIR Research Space (South Africa)

    Cooper, Antony K

    2002-01-01

    Full Text Available This paper presents a few examples of tactical crime mapping and analysis done by the Council for Scientific and Industrial Research (CSIR) and the South African Police Service (SAPS). In these cases, the police had already arrested the suspects...

  18. Examples for Non-Ideal Solution Thermodynamics Study

    Science.gov (United States)

    David, Carl W.

    2004-01-01

    A mathematical model of a non-ideal solution is presented, where it is shown how and where the non-ideality manifests itself in the standard thermodynamics tableau. Examples related to the non-ideal solution thermodynamics study are also included.

  19. Pedagogical Wishes for a Machine Dictionary: An Example from Russian.

    Science.gov (United States)

    Keller, Howard H.

    1987-01-01

    Describes the uses for and advantages of a computerized foreign language/ English dictionary. Using Russian as an example, the additional teaching functions such a dictionary could provide include: (1) word frequency; (2) etymological information; (3) word family; (4) tergo listings; (5) synonym listings; (6) thesaurus listings; and (7) literary…

  20. Using Different Examples of Natural Selection When Teaching Biology.

    Science.gov (United States)

    Perry, Robert T.

    1993-01-01

    Describes the following examples of natural selection for use in science instruction: sickle-cell anemia and human beings, clogged crabs, the rounding of the human head, shell color in land snails, pollinator behavior and flower color, copper tolerance in a grass, lizards and quick change, and Darwin's finches. (PR)

  1. Examples of in-vivo blood vector velocity estimation

    DEFF Research Database (Denmark)

    Udesen, Jesper; Nielsen, Michael Bachmann; Nielsen, Kristian R.

    2007-01-01

    In this paper examples of in-vivo blood vector velocity images of the carotid artery are presented. The transverse oscillation (TO) method for blood vector velocity estimation has been used to estimate the vector velocities and the method is first evaluated in a circulating flowrig where...

  2. Critical Practice Analysis of Special Education Policy: An RTI Example

    Science.gov (United States)

    Thorius, Kathleen A. King; Maxcy, Brendan D.

    2015-01-01

    Since 1997, revisions to the Individuals With Disabilities Education Act (IDEA) have shown promise for addressing special education equity concerns: For example, states have the option to use response to intervention (RTI) for determining and thus reducing inappropriate disability determination, and states and districts are required to assess and…

  3. The Use of Examples in Polyfunc- tional Dictionaries

    African Journals Online (AJOL)

    Abstract: Dictionary compilation for the African languages in South Africa stands on the eve of the African Renaissance and prospective compilers of dictionaries for African languages are in need of a sound perspective and guidelines in respect of the compilation and choice of examples. The aim of this article is to analyse ...

  4. Multiple-Solution Problems in a Statistics Classroom: An Example

    Science.gov (United States)

    Chu, Chi Wing; Chan, Kevin L. T.; Chan, Wai-Sum; Kwong, Koon-Shing

    2017-01-01

    The mathematics education literature shows that encouraging students to develop multiple solutions for given problems has a positive effect on students' understanding and creativity. In this paper, we present an example of multiple-solution problems in statistics involving a set of non-traditional dice. In particular, we consider the exact…

  5. Vulnerability of classifiers to evolutionary generated adversarial examples

    Czech Academy of Sciences Publication Activity Database

    Vidnerová, Petra; Neruda, Roman

    submitted 14.1. 2017 (2018) ISSN 0941-0643 R&D Projects: GA ČR GA15-18108S Institutional support: RVO:67985807 Keywords : supervised learning * neural networks * kernel methods * genetic algorithms * adversarial examples Subject RIV: IN - Informatics, Computer Science Impact factor: 2.505, year: 2016

  6. Work Tasks and Socio-Cognitive Relevance: A Specific Example.

    Science.gov (United States)

    Hjorland, Birger; Christensen, Frank Sejer

    2002-01-01

    Presents a concrete example of a work task, a doctor treating a patient with schizophrenia, to clarify conceptual issues concerning relevance. Outlines how work task, work situation, perceived work situation, task complexity, information need, information seeking and topicality, situational relevance, relevance assessment, and work task…

  7. Using heuristic worked examples to promote inquiry-based learning

    NARCIS (Netherlands)

    Mulder, Y.G.; Lazonder, Adrianus W.; de Jong, Anthonius J.M.

    2014-01-01

    Inquiry learning can be facilitated by having students investigate the domain through a computer simulation and express their acquired understanding in a runnable computer model. This study investigated whether heuristic worked examples can further enhance students' inquiry behaviour, the quality of

  8. Regional differences in mitigation strategies: an example for passenger transport

    NARCIS (Netherlands)

    Deetman, Sebastiaan; Hof, Andries; Girod, Bastien; van Vuuren, Detlef

    2015-01-01

    This paper shows the importance of including region-specific circumstances in long-term climate change mitigation strategies, by example of a modeling exercise of the transport sector. Important emission reduction options in the transport sector include biofuels, electric vehicles and efficiency

  9. LED's in Physics Demos: A Handful of Examples.

    Science.gov (United States)

    Lottis, Dan; Jaeger, Herbert

    1996-01-01

    Describes the use of light-emitting diodes (LED) instead of incandescent bulbs in experiments that generally use battery and bulbs to enable students to explore and understand fundamental electrical phenomena. Presents the following examples: Faraday's Law demonstration, conductors and insulators, and rectifying action of a diode. (JRH)

  10. First examples of metal derivatives of modified corrole and ...

    Indian Academy of Sciences (India)

    Administrator

    First examples of metal derivatives of modified corrole and expanded corrole. S SRIDEVI, JEYAPRAKASH NARAYANAN and. T K CHANDRASHEKAR. Department of Chemistry, Indian Institute of Technology,. Kanpur 208 016, India. In recent years, though the importance of expanded porphyrins has been highlighted,.

  11. Some Elementary Examples from Newton's Principia -R-ES ...

    Indian Academy of Sciences (India)

    force proportional to the distance from the centre. The Figure3. PSisextendedto most famous law, of course, is the inverse square law for meetthecirc/eat v. VOWis elliptical orbits with the centre of force being one of the the diameter of the eire/e. foci of the ellipse. p. Another example is, a particle moving in a circular orbit.

  12. The Crni Kal Quarry - An Example of Destroying Geotopes

    OpenAIRE

    Pavlovec, R.; Pohar, V.

    1997-01-01

    Although we are slowly becoming aware of the necessity to preserve the geotopes, there are also problems arising from their protection. It is practically impossible to save some of geotopes in their entirety of which the quarry of Crni Kal near Koper is one example. Here are many interesting fossils including Palaeogene corals, foraminifera, molluscs and Pleistocene mammals in infilled karst caves.

  13. Example-Based Learning: Effects of Different Types of Examples on Student Performance, Cognitive Load and Self-Efficacy in a Statistical Learning Task

    Science.gov (United States)

    Huang, Xiaoxia

    2017-01-01

    Previous research has indicated the disconnect between example-based research focusing on worked examples (WEs) and that focusing on modeling examples. The purpose of this study was to examine and compare the effect of four different types of examples from the two separate lines of research, including standard WEs, erroneous WEs, expert (masterly)…

  14. The Need for Killer Examples for Object-Oriented Frameworks

    DEFF Research Database (Denmark)

    Caspersen, Michael Edelgaard; Christensen, Henrik Bærbak

    2003-01-01

    In this paper, we argue in favor of introducing object-oriented frameworks as an important topic in our software engineering teaching. Frameworks provide a basis for students to build interesting and impressive programs even with small programming effort at the introductory level. Frameworks...... of publications and literature about teaching frameworks, it seems that few has realized the potential---it is an under-utilized technology. We therefore suggest that killer examples are highly needed and present some experiences with two frameworks that we have found useful in our teaching....... are excellent examples of the use of design patterns and software engineering principles to serve as case study at the advanced level. And frameworks convey the important pedagogical point that developing software means reusing software just as much as producing code. However, counting the number...

  15. Acceleration from Modified Gravity: Lessons from Worked Examples

    Energy Technology Data Exchange (ETDEWEB)

    Hu, Wayne [Kavli Institute for Cosmological Physics, Department of Astronomy and Astrophysics, Enrico Fermi Institute, University of Chicago, Chicago, IL 60637 (United States)

    2009-10-15

    I examine how two specific examples of modified gravity explanations of cosmic acceleration help us understand some general problems confronting cosmological tests of gravity: how do we distinguish modified gravity from dark energy if they can be made formally equivalent? how do we parameterize deviations according to physical principles with sufficient generality, yet focus cosmological tests into areas that complement our existing knowledge of gravity? how do we treat the dynamics of modifications which necessarily involve non-linearities that preclude superposition of forces? The modified action f(R) and DGP braneworld models provide insight on these question as fully-worked examples whose expansion history, linear perturbation theory, and most recently, non-linear N-body and force-modification field dynamics of cosmological simulations are available for study.

  16. An explicit example of Hopf bifurcation in fluid mechanics

    Science.gov (United States)

    Kloeden, P.; Wells, R.

    1983-01-01

    It is observed that a complete and explicit example of Hopf bifurcation appears not to be known in fluid mechanics. Such an example is presented for the rotating Benard problem with free boundary conditions on the upper and lower faces, and horizontally periodic solutions. Normal modes are found for the linearization, and the Veronis computation of the wave numbers is modified to take into account the imposed horizontal periodicity. An invariant subspace of the phase space is found in which the hypotheses of the Joseph-Sattinger theorem are verified, thus demonstrating the Hopf bifurcation. The criticality calculations are carried through to demonstrate rigorously, that the bifurcation is subcritical for certain cases, and to demonstrate numerically that it is subcritical for all the cases in the paper.

  17. Strategy Guideline: Quality Management in Existing Homes; Cantilever Floor Example

    Energy Technology Data Exchange (ETDEWEB)

    Taggart, J.; Sikora, J.; Wiehagen, J.; Wood, A.

    2011-12-01

    This guideline is designed to highlight the QA process that can be applied to any residential building retrofit activity. The cantilevered floor retrofit detailed in this guideline is included only to provide an actual retrofit example to better illustrate the QA activities being presented. The goal of existing home high performing remodeling quality management systems (HPR-QMS) is to establish practices and processes that can be used throughout any remodeling project. The research presented in this document provides a comparison of a selected retrofit activity as typically done versus that same retrofit activity approached from an integrated high performance remodeling and quality management perspective. It highlights some key quality management tools and approaches that can be adopted incrementally by a high performance remodeler for this or any high performance retrofit. This example is intended as a template and establishes a methodology that can be used to develop a portfolio of high performance remodeling strategies.

  18. HOW CORPORATIONS MOTIVATE THEIR EMPLOYEES – HRVATSKI TELEKOM EXAMPLE

    Directory of Open Access Journals (Sweden)

    Aleksandar Erceg

    2016-07-01

    increase competitiveness of the company. Their managers need to know who their employees are, what are their habits, what kind is their behavior in the company, whether they are willing to work in teams, their features and capabilities. Based on the answers to these questions, managers need to know which of the motivational techniques apply to individual employee in order to achieve the best result. This paper describes different motivation theories and shows the theoretical framework of human resource management through motivation and compensation programs based on practical example. As a practical example, Hrvatski Telekom (HT was chosen due to its compliance with the basic principles of human resource management including motivating employees which results in company success on Croatian telecommunication market.

  19. Development of a Benchmark Example for Delamination Fatigue Growth Prediction

    Science.gov (United States)

    Krueger, Ronald

    2010-01-01

    The development of a benchmark example for cyclic delamination growth prediction is presented and demonstrated for a commercial code. The example is based on a finite element model of a Double Cantilever Beam (DCB) specimen, which is independent of the analysis software used and allows the assessment of the delamination growth prediction capabilities in commercial finite element codes. First, the benchmark result was created for the specimen. Second, starting from an initially straight front, the delamination was allowed to grow under cyclic loading in a finite element model of a commercial code. The number of cycles to delamination onset and the number of cycles during stable delamination growth for each growth increment were obtained from the analysis. In general, good agreement between the results obtained from the growth analysis and the benchmark results could be achieved by selecting the appropriate input parameters. Overall, the results are encouraging but further assessment for mixed-mode delamination is required.

  20. Leading by example: the case of leader OCB.

    Science.gov (United States)

    Yaffe, Tal; Kark, Ronit

    2011-07-01

    The importance of leading by personal example or role modeling for effective leadership has been recognized in many leadership theories. However, leaders' ability to influence group behavior through exemplary behavior has received little attention in empirical work. This study explores leading by example through theoretical development and empirical testing of a moderated mediation model of the potential effects of leader organizational citizenship behavior (OCB). This model suggests that a leader's OCB may promote group OCB directly and indirectly by enhancing the group's belief that OCB is worthy. It also specifies the moderators of the direct and indirect effects of leader OCB on group OCB. Data from 683 members of 67 intact work groups, 67 group managers, and their supervisors support the hypothesized model. The theoretical and practical implications of these findings are discussed.

  1. Dicty_cDB: Contig-U11679-1 [Dicty_cDB

    Lifescience Database Archive (English)

    Full Text Available sex-determining region Y protein ... 48 0.90 1 ( DQ095194 ) Oncifelis geoffroyi sex-determining region...sex-determining region Y protein (SRY... 48 0.90 1 ( DQ095191 ) Oncifelis guigna sex-determining region...concolor sex-determining region Y protein (S... 48 0.90 1 ( DQ095188 ) Felis catus sex-determining region Y protein...sex-determining region Y protein... 48 0.90 1 ( DQ095186 ) Leopardus wiedii sex-determining region Y...sex-determining region Y prote... 48 0.90 1 ( DQ095177 ) Leopardus pardalis sex-determining region Y

  2. First report of Strongyloides sp. (Nematoda, Strongyloididae) in Leopardus tigrinus (Carnivora: Felidae) in the municipality of Botucatu, State of São Paulo, Brazil.

    Science.gov (United States)

    dos Santos, Karina R; Faciulli, Paula; Paparotto, Telma; Takahira, Regina K; Lopes, Raimundo S; da Silva, Reinaldo J

    2009-12-01

    The present study reports the first case of infection by Strongyloides sp. in Leopardus tigrinus in the municipality of Botucatu, State of São Paulo, Brazil. Feces of the infected L. tigrinus specimen were cultivated in sterilized equine feces and a cat (Felis catus domesticus) was experimentally infected with three thousand infective L3 subcutaneous route, in order to identify the Strongyloides species involved in the parasitism. Parthenogenetic females recovered from the experimental animals were analyzed but comparison between the biometric data found and the data in the literature did not enable identification of the species. This is the first report on the occurrence of Strongyloides sp. in L. tigrinus.

  3. An example of self–acceleration for incompressible flows

    Directory of Open Access Journals (Sweden)

    Jens Lorenz

    2013-12-01

    Full Text Available In this paper we consider the Cauchy problem for the unforced Eulerand Navier–Stokes equations for incompressible flows. We give an example of a smooth initial velocity field of finite energy which is self-accelerating, i.e., the maximal speed increases for some time. The self–acceleration is due to the non–Bernoulli part of the pressure generated by the velocity field.

  4. Uncertainty and Decision Making: Examples of Some Possible New Frontiers

    Science.gov (United States)

    Silliman, S. E.; Rodak, C. M.; Bolster, D.; Saavedra, K.; Evans, W.

    2011-12-01

    The concept of decision making under uncertainty for groundwater systems represents an exciting area of research and application. In this presentation, three examples are briefly introduced which represent possible new applications of risk and decision making under uncertainty. In the most classic of the three examples, a probabilistic strategy is considered within the context of management / assessment of proposed changes in land-use in the vicinity of a public water-supply well. Focused on health-risk related to contamination at the well, the analysis includes uncertainties in source location / strength, groundwater flow / transport, human exposure, and human health risk. The second example involves application of Probabilistic Risk Assessment (PRA) to the evaluation of development projects in rural regions of developing countries. PRA combined with Fault Tree Analysis provides a structure for analysis of the impact of data uncertainties on the estimation of health risk resulting from failure of multiple components of new water-resource systems. The third is an extension of the concept of "risk compensation" to the analysis of potential long-term risk associated with new water resource projects. Of direct interest here is the appearance of new risk to the public, such as introduction of new disease pathways or new sources of contamination of the source waters. As a result of limitations on conceptual model and/or limitations on data, this type of risk is often difficult to identify / assess, and is therefore not commonly included in formal decision-making efforts: it may however seriously impact the long-term net benefit of a water resource project. The goal of presenting these three examples is to illustrate the breadth of possible application of uncertainty / risk analyses beyond the more classic applications to groundwater remediation and protection.

  5. Personalized or Precision Medicine? The Example of Cystic Fibrosis

    OpenAIRE

    Marson, Fernando A. L.; Bertuzzo, Carmen S.; Ribeiro, Jos? D.

    2017-01-01

    The advent of the knowledge on human genetics, by the identification of disease-associated variants, culminated in the understanding of human variability. With the genetic knowledge, the specificity of the clinical phenotype and the drug response of each individual were understood. Using the cystic fibrosis (CF) as an example, the new terms that emerged such as personalized medicine and precision medicine can be characterized. The genetic knowledge in CF is broad and the presence of a monogen...

  6. Zend framework 2.0 by example beginner's guide

    CERN Document Server

    Shasankar, Krishna

    2013-01-01

    Zend Framework 2.0 by Example: Beginner's Guide is a step-by-step guide that aims to empower you to build web applications packed with some really exciting features using Zend Framework 2.0.If you are a PHP Developer who is new to Zend Framework, but you want to get hands-on with the product quickly, this book is for you. Basic knowledge of object oriented programming with PHP is expected.

  7. Videoconference for psychotherapy training and supervision: two case examples.

    Science.gov (United States)

    Rousmaniere, Tony; Abbass, Allan; Frederickson, Jon; Henning, Inés; Taubner, Svenja

    2014-01-01

    Psychotherapy supervision and training are now widely available online. However, many supervisors still may be unclear on how online supervision actually works, or what it actually looks like in practice. In this article, three case examples of online videoconference-based supervision programs will be described. Partial transcripts from two online supervision sessions are provided. The benefits and limitations of online supervision are discussed, including discussion of supervision process, ethics, privacy, and security.

  8. Gas dynamics an introduction with examples from astrophysics and geophysics

    CERN Document Server

    Achterberg, Abraham

    2016-01-01

    This book lays the foundations of gas- and fluid dynamics. The basic equations are developed from first principles, building on the (assumed) knowledge of Classical Mechanics. This leads to the discussion of the mathematical properties of flows, conservation laws, perturbation analysis, waves and shocks. Most of the discussion centers on ideal (frictionless) fluids and gases. Viscous flows are discussed when considering flows around obstacles and shocks. Many of the examples used to illustrate various processes come from astrophysics and geophysical phenomena.

  9. A new approach for understanding ion transport in glasses; example ...

    Indian Academy of Sciences (India)

    Further, only minor importance is given to the influence of structure of the glass on the ionic conductivity behaviour. In this paper, we have examined several general aspects of ion transport taking the example of ionically conducting glasses in pseudo binary, yNa2B4O7·(1−y) MaOb (with y = 0·25–0·79 and MaOb = PbO,.

  10. iPhone Location Aware Apps by Example - Beginners Guide

    CERN Document Server

    Chawdhary, Zeeshan

    2012-01-01

    Using a By example approach you will master the essentials of location awareness and augmented reality by building five complete apps using easy to follow step by step instructions geared towards newcomers. Novice to professional level iOS programmers who want to master location awareness and augmented reality. Build five practical location-based iOS Apps from scratch, a first for any book, converting learning into actual implementation.

  11. Radio Stalin as an example of the Czech pirate radio

    OpenAIRE

    Prágrová, Šárka

    2017-01-01

    Diploma thesis "Radio Stalin as an example of Czech piracy radio broadcast" is aimed to complexly present radio station Radio Stalin which was broadcasting in October 1990 in Prague. Radio Stalin is presented in the context of events of that time and related changes in politics, economy, society and media and in the context of piracy radio broadcast. First of all the emphasis is put on media transformation and changes in legislative framework of radio broadcasting after 1989. Radio Stalin is ...

  12. Learning Parse and Translation Decisions From Examples With Rich Context

    CERN Document Server

    Hermjakob, U; Hermjakob, Ulf; Mooney, Raymond J.

    1997-01-01

    We present a knowledge and context-based system for parsing and translating natural language and evaluate it on sentences from the Wall Street Journal. Applying machine learning techniques, the system uses parse action examples acquired under supervision to generate a deterministic shift-reduce parser in the form of a decision structure. It relies heavily on context, as encoded in features which describe the morphological, syntactic, semantic and other aspects of a given parse state.

  13. Qualitative case study data analysis: an example from practice.

    Science.gov (United States)

    Houghton, Catherine; Murphy, Kathy; Shaw, David; Casey, Dympna

    2015-05-01

    To illustrate an approach to data analysis in qualitative case study methodology. There is often little detail in case study research about how data were analysed. However, it is important that comprehensive analysis procedures are used because there are often large sets of data from multiple sources of evidence. Furthermore, the ability to describe in detail how the analysis was conducted ensures rigour in reporting qualitative research. The research example used is a multiple case study that explored the role of the clinical skills laboratory in preparing students for the real world of practice. Data analysis was conducted using a framework guided by the four stages of analysis outlined by Morse ( 1994 ): comprehending, synthesising, theorising and recontextualising. The specific strategies for analysis in these stages centred on the work of Miles and Huberman ( 1994 ), which has been successfully used in case study research. The data were managed using NVivo software. Literature examining qualitative data analysis was reviewed and strategies illustrated by the case study example provided. Discussion Each stage of the analysis framework is described with illustration from the research example for the purpose of highlighting the benefits of a systematic approach to handling large data sets from multiple sources. By providing an example of how each stage of the analysis was conducted, it is hoped that researchers will be able to consider the benefits of such an approach to their own case study analysis. This paper illustrates specific strategies that can be employed when conducting data analysis in case study research and other qualitative research designs.

  14. Nonlinear time series theory, methods and applications with R examples

    CERN Document Server

    Douc, Randal; Stoffer, David

    2014-01-01

    FOUNDATIONSLinear ModelsStochastic Processes The Covariance World Linear Processes The Multivariate Cases Numerical Examples ExercisesLinear Gaussian State Space Models Model Basics Filtering, Smoothing, and Forecasting Maximum Likelihood Estimation Smoothing Splines and the Kalman Smoother Asymptotic Distribution of the MLE Missing Data Modifications Structural Component Models State-Space Models with Correlated Errors Exercises Beyond Linear ModelsNonlinear Non-Gaussian Data Volterra Series Expansion Cumulants and Higher-Order Spectra Bilinear Models Conditionally Heteroscedastic Models Thre

  15. Open software in small enterprises. Private medical practise example

    Directory of Open Access Journals (Sweden)

    Dominik Meller

    2011-06-01

    Full Text Available Article covers basic concepts of free and open software and its implementation at small health care facilities. It summarizes costs of possession and maintenance free/open and proprietary software. Functional analysis is conducted on example of office software. Further analysis covers barriers of open software implementation based on requirements of small health care facilities. Finally, according to stated requirements suggestion of ways to overcome these barriers are made.

  16. High dimensional Bernstein-von Mises: simple examples

    OpenAIRE

    Johnstone, Iain M.

    2010-01-01

    In Gaussian sequence models with Gaussian priors, we develop some simple examples to illustrate three perspectives on matching of posterior and frequentist probabilities when the dimension p increases with sample size n: (i) convergence of joint posterior distributions, (ii) behavior of a non-linear functional: squared error loss, and (iii) estimation of linear functionals. The three settings are progressively less demanding in terms of conditions needed for validity of the Bernstein-von Mise...

  17. Two examples of circular motion for introductory courses in relativity

    Science.gov (United States)

    Wortel, Stephanie; Malin, Shimon; Semon, Mark D.

    2007-12-01

    The circular twin paradox and Thomas precession are presented in a way that makes them accessible to students in introductory relativity courses. Both are discussed by examining what happens during travel around a polygon and then in the limit as the polygon becomes a circle. Because relativistic predictions based on these examples are verified in experiments with macroscopic objects (such as atomic clocks flown in airplanes and the gyroscopes on Gravity Probe B), they are especially convincing to introductory students.

  18. Digital libraries philosophies, technical design considerations, and example scenarios

    CERN Document Server

    Stern, David

    1999-01-01

    An unparalleled overview of current design considerations for your digital library! Digital Libraries: Philosophies, Technical Design Considerations, and Example Scenarios is a balanced overview of public services, collection development, administration, and systems support, for digital libraries, with advice on adopting the latest technologies that appear on the scene. As a professional in the library and information science field, you will benefit from this special issue that serves as an overview of selected directions, trends, possibilities, limitations, enhancements, design principals, an

  19. Water resources by orbital remote sensing: Examples of applications

    Science.gov (United States)

    Martini, P. R. (Principal Investigator)

    1984-01-01

    Selected applications of orbital remote sensing to water resources undertaken by INPE are described. General specifications of Earth application satellites and technical characteristics of LANDSAT 1, 2, 3, and 4 subsystems are described. Spatial, temporal and spectral image attributes of water as well as methods of image analysis for applications to water resources are discussed. Selected examples are referred to flood monitoring, analysis of water suspended sediments, spatial distribution of pollutants, inventory of surface water bodies and mapping of alluvial aquifers.

  20. Groups and manifolds lectures for physicists with examples in Mathematica

    CERN Document Server

    Fré, Pietro Giuseppe

    2018-01-01

    Groups and Manifolds is an introduction to the mathematics of symmetry with a variety of examples for physicists. It covers both classical symmetry as seen in crystallography as well as the mathematical concepts used in super-symmetric field theories. After a basic introduction of group theory, Lie algebras and a basic notion of differential geometry are discussed. Group-theoretical constructions are done using Mathematica.

  1. Personalized Resource Recommendations using Learning from Positive and Unlabeled Examples

    Directory of Open Access Journals (Sweden)

    Priyank Thakkar

    2016-08-01

    Full Text Available This paper proposes a novel approach for recommending social resources using learning from positive and unlabeled examples. Bookmarks submitted on social bookmarking system delicious1 and artists on online music system last.fm2 are considered as social resources. The foremost feature of this problem is that there are no labeled negative resources/examples available for learning a recommender/classifier. The memory based collaborative filtering has served as the most widely used algorithm for social resource recommendation. However, its predictions are based on some ad hoc heuristic rules and its success depends on the availability of a critical mass of users. This paper proposes model based two-step techniques to learn a classifier using positive and unlabeled examples to address personalized resource recommendations. In the first step of these techniques, naïve Bayes classifier is employed to identify reliable negative resources. In the second step, to generate effective resource recommender, classification and regression tree and least square support vector machine (LS-SVM are exercised. A direct method based on LS-SVM is also put forward to realize the recommendation task. LS-SVM is customized for learning from positive and unlabeled data. Furthermore, the impact of feature selection on our proposed techniques is also studied. Memory based collaborative filtering as well as our proposed techniques exploit usage data to generate personalized recommendations. Experimental results show that the proposed techniques outperform existing method appreciably.

  2. Biodiversity, phylogeography, biogeography and conservation: lemurs as an example.

    Science.gov (United States)

    Thalmann, Urs

    2007-01-01

    The lemurs of Madagascar represent a spectacular example of adaptive radiation among primates. Given the special setting under which they evolved (i.e. long isolation, geographical location, geological relief), they provide excellent models for study in many realms, and at different levels and scales, including diversity. At the same time, they occur in a 'hottest hot spot' region for biodiversity conservation. Although there is no single definition of biodiversity, the most commonly used units to measure biodiversity are species-species richness, species abundance and, for conservation purposes in particular, species endemism. However, what a species actually is or how, precisely, it should be defined are unresolved issues. Many species concepts have been proposed and several have been used in primatology in recent years. Nowadays, one of the more common approaches to measuring diversity, and eventually inferring species status, is to look at genetic diversity as reflected by mitochondrial DNA differences. Not enough attention has been paid, however, to the different levels at which genetic differences may occur. Lemurs provide instructive examples to highlight the questions involved in species recognition and definition. Using lemurs as examples, I will highlight the strengths and limitations of some analytical tools, including phylogeography and cladistic biogeography and, I will, in particular, emphasize the questions arising at the interface of scientific and conservation perceptions, both of which influence decisions in the field of biodiversity preservation. Copyright 2007 S. Karger AG, Basel.

  3. Using Framework Analysis in nursing research: a worked example.

    Science.gov (United States)

    Ward, Deborah J; Furber, Christine; Tierney, Stephanie; Swallow, Veronica

    2013-11-01

    To demonstrate Framework Analysis using a worked example and to illustrate how criticisms of qualitative data analysis including issues of clarity and transparency can be addressed. Critics of the analysis of qualitative data sometimes cite lack of clarity and transparency about analytical procedures; this can deter nurse researchers from undertaking qualitative studies. Framework Analysis is flexible, systematic, and rigorous, offering clarity, transparency, an audit trail, an option for theme-based and case-based analysis and for readily retrievable data. This paper offers further explanation of the process undertaken which is illustrated with a worked example. Data were collected from 31 nursing students in 2009 using semi-structured interviews. The data collected are not reported directly here but used as a worked example for the five steps of Framework Analysis. Suggestions are provided to guide researchers through essential steps in undertaking Framework Analysis. The benefits and limitations of Framework Analysis are discussed. Nurses increasingly use qualitative research methods and need to use an analysis approach that offers transparency and rigour which Framework Analysis can provide. Nurse researchers may find the detailed critique of Framework Analysis presented in this paper a useful resource when designing and conducting qualitative studies. Qualitative data analysis presents challenges in relation to the volume and complexity of data obtained and the need to present an 'audit trail' for those using the research findings. Framework Analysis is an appropriate, rigorous and systematic method for undertaking qualitative analysis. © 2013 Blackwell Publishing Ltd.

  4. Ancon sheep: a now disproven example of macroevolution.

    Science.gov (United States)

    Bergman, Gerald

    2005-01-01

    The Ancon breed of sheep provided, for decades, a critical support for the existence of major evolutionary changes or jumps called "sports." Putative examples of sports have been used as evidence of rapid macroevolution since Darwin first discussed the Ancon sheep mutation in 1859. Ancon sheep had very short legs that were considered an advantage for shepherds because the sheep were less likely to escape over fences. Many textbooks and articles implied that the breed was an example of how a major new trait could evolve in a single generation. The Ancon sheep example has been used both to prove gradual Darwinism and also to argue for rapid evolution as opposed to gradualism. It now is recognized that Ancon sheep resulted from genetic diseases, and that they usually suffered from achondroplasia. The so-called new breed had so many major health problems that the condition caused the breed's extinction decades ago, yet was mentioned in textbooks as evidence for evolutionary jumps as recently as 2005.

  5. Risk factors and their identification. Third Part: Examples.

    Science.gov (United States)

    Balkau, B; Eschwege, E

    1995-10-01

    This is the final of a series of three articles in Diabete & Metabolisme which reviews the identification of risk factors of a disease, here: diabetes or complications of diabetes. In the first of the series [1], we gave the definition of a risk factor, along with measures of its force-relative risk and odds ratio, followed by the epidemiological definitions of the diseases: diabetes, coronary heart disease and hypertension. Risk factors were further discussed and we completed the discussion by some observations on the bias which can arise from a study or from its analysis, which can lead the researcher to the wrong conclusion. The three types of epidemiological studies which are used to determine whether factors are associated with a disease: observational or cross-sectional studies, cohort studies and case-cohort studies are described in the second of the series [2]. Examples were provided of each of these study types and their advantages and disadvantages were discussed. This final paper provides some examples of the study types and the identification of risk factors from the literature. The first examples involve diabetes and pancreatic cancer, the second birth weight and non-insulin dependent diabetes. Having found an association between a risk factor and a disease, we then discuss whether it can be considered to be a risk factor, and if so and whether it is likely to be a cause of the disease.

  6. Tecnomatix Plant Simulation modeling and programming by means of examples

    CERN Document Server

    Bangsow, Steffen

    2015-01-01

    This book systematically introduces the development of simulation models as well as the implementation and evaluation of simulation experiments with Tecnomatix Plant Simulation. It deals with all users of Plant Simulation, who have more complex tasks to handle. It also looks for an easy entry into the program. Particular attention has been paid to introduce the simulation flow language SimTalk and its use in various areas of the simulation. The author demonstrates with over 200 examples how to combine the blocks for simulation models and how to deal with SimTalk for complex control and analys

  7. An Introduction to Computational Fluid Mechanics by Example

    CERN Document Server

    Biringen, Sedat

    2011-01-01

    This new book builds on the original classic textbook entitled: An Introduction to Computational Fluid Mechanics by C. Y. Chow which was originally published in 1979. In the decades that have passed since this book was published the field of computational fluid dynamics has seen a number of changes in both the sophistication of the algorithms used but also advances in the computer hardware and software available. This new book incorporates the latest algorithms in the solution techniques and supports this by using numerous examples of applications to a broad range of industries from mechanical

  8. Confronting classical and Bayesian confidence limits to examples

    CERN Document Server

    Zech, G

    2000-01-01

    Classical confidence limits are compared to Bayesian error bounds by studying relevant examples. The performance of the two methods is investigated relative to the properties coherence, precision, bias, universality, simplicity. A proposal to define error limits in various cases is derived from the comparison. It is based on the likelihood function only and follows in most cases the general practice in high energy physics. Classical methods are discarded because they violate the likelihood principle, they can produce physically inconsistent results, suffer from a lack of precision and generality. Also the extreme Bayesian approach with arbitrary choice of the prior probability density or priors deduced from scaling laws is rejected.

  9. Collaborative process improvement with examples from the software world

    CERN Document Server

    Yeakley, C

    2007-01-01

    Collaborative Process Improvement specifically addresses software companies that are interested in addressing quality in human terms. Using Collaborative Process Improvement techniques builds effective processes to deliver quality products; it helps readers relate to what quality means to the end-user and provides the essential tools and methods to integrate the face of the customer into the organization's day-to-day processes. It comes complete with real-world examples that are practical and unders andable to professionals in every role of a company.

  10. Object-based Landslide Mapping: Examples, Challenges and Opportunities

    Science.gov (United States)

    Hölbling, Daniel; Eisank, Clemens; Friedl, Barbara; Chang, Kang-Tsung; Tsai, Tsai-Tsung; Birkefeldt Møller Pedersen, Gro; Betts, Harley; Cigna, Francesca; Chiang, Shou-Hao; Aubrey Robson, Benjamin; Bianchini, Silvia; Füreder, Petra; Albrecht, Florian; Spiekermann, Raphael; Weinke, Elisabeth; Blaschke, Thomas; Phillips, Chris

    2016-04-01

    Over the last decade, object-based image analysis (OBIA) has been increasingly used for mapping landslides that occur after triggering events such as heavy rainfall. The increasing availability and quality of Earth Observation (EO) data in terms of temporal, spatial and spectral resolution allows for comprehensive mapping of landslides at multiple scales. Most often very high resolution (VHR) or high resolution (HR) optical satellite images are used in combination with a digital elevation model (DEM) and its products such as slope and curvature. Semi-automated object-based mapping makes use of various characteristics of image objects that are derived through segmentation. OBIA enables numerous spectral, spatial, contextual and textural image object properties to be applied during an analysis. This is especially useful when mapping complex natural features such as landslides and constitutes an advantage over pixel-based image analysis. However, several drawbacks in the process of object-based landslide mapping have not been overcome yet. The developed classification routines are often rather complex and limited regarding their transferability across areas and sensors. There is still more research needed to further improve present approaches and to fully exploit the capabilities of OBIA for landslide mapping. In this study several examples of object-based landslide mapping from various geographical regions with different characteristics are presented. Examples from the Austrian and Italian Alps are shown, whereby one challenge lies in the detection of small-scale landslides on steep slopes while preventing the classification of false positives with similar spectral properties (construction areas, utilized land, etc.). Further examples feature landslides mapped in Iceland, where the differentiation of landslides from other landscape-altering processes in a highly dynamic volcanic landscape poses a very distinct challenge, and in Norway, which is exposed to multiple

  11. A few examples of opposed thinking about gender differences

    Directory of Open Access Journals (Sweden)

    Redžić Saduša F.

    2016-01-01

    Full Text Available Examples of anti-feminine and pro-feminine reasoning with Otto Weininger, Jean-Jacques Rousseau, Sigmund Freud, Arthur Schopenhauer, Aristotle, Simone de Beauvoir, Pierre Bourdieu, Harriet Taylor Mill and John Stuart Mill. Review of these theories points to the need to respect distinction (physical characteristics of sex and (culture defined characteristic of the gender when analyzing differences and similarities between the sexes, as well as the need for insight into the mechanism (or mechanismsof connection between the nature of social perception and gender stereotypes, whose existence is an indicator, and one of the causes of hatred towards women.

  12. Allocating global package pricing. The example of bypass surgery.

    Science.gov (United States)

    Biebuyck, J F; Locke, J

    1996-01-01

    When health care organizations announce a change in rates paid to physicians, determining how to equitably distribute the new allocation can be a problem. Package pricing requires practitioners to justify their fees or costs to their colleagues and negotiate for a "specific piece of the pie." While this approach has many models, there are few actual examples. When some successful ones are developed, they should include an economic model which allows a practice to make business decision about marginal production opportunities that are in the best interest of all parties involved. Steps include determining actual costs, historical charge patterns, historical payment patterns and Medicare payment rates.

  13. Logistics Distribution Center Location Optimizatio Model An Example Study

    Directory of Open Access Journals (Sweden)

    Li Lingling

    2017-01-01

    Full Text Available This paper analyzes and investigates the situation of the today’s site of distribution centers .Then taking SF Express for an example ,In the light of minimize the total expense ,the location models for single distribution centers is established with the corresponding resolutions given .After that ,The location of the single distribution center of SF Express ,the starting point of which is Zhengzhou Railway Station ,can be determined with the help of distance-testing function of 360 map to conclude its coordinate and then determine its exact service spot .This paper will test the feasibility of above models by the chosen cases with the application of LINGO software.

  14. Unlocking the mysteries of cataloging a workbook of examples

    CERN Document Server

    Haynes, Elizabeth; Zwierski, Michele

    2015-01-01

    Provides more than 100 examples that together encompass virtually all types of materials libraries collect and catalog, with MARC ""answer"" records Offers exercises that allow practice in AACR2r and RDA, description, subject classification, subject heading application, classification, subject analysis, and MARC 21 Covers both RDA and AACR2r answer records for selected exercises Includes non-English materials Links to a website that provides for multiple approaches and answer records and enables you to view all the graphics in color and enlarge them as needed Links instruction to a

  15. Generating concept representations from examples, using set-based notation

    DEFF Research Database (Denmark)

    Galle, Per

    2000-01-01

    them in a conceptual schema, is generally difficult. I believe and assume that it is much easier for people to grasp and represent a specific instance of a concept, than the concept itself in full generality. Based on this assumption, I propose a method for relatively easy (semi-automated) construction......A database or knowledge-based system must draw on a conceptual schema that defines the domain concepts with which its user works. In the case of a system for architectural design support, for example, this might be concepts of walls, windows etc. However, making concepts explicit and expressing...

  16. An example of a non adequate numeral system

    OpenAIRE

    Nour, Karim

    1996-01-01

    International audience; A numeral system is defined by three closed $\\lambda$-terms : a normal $\\lambda$-term $d_0$ for Zero, a $\\lambda$-term $S_d$ for Successor, and a $\\lambda$-term for Zero Test, such that the $\\lambda$-terms $({S_d}^{i} ~ d_0)$ are normalizable and have different normal forms. A numeral system is said adequate iff it has a closed $\\lambda$-term for Predecessor. This Note gives a simple example of a non adequate numeral system.

  17. Practical example of game theory application for production route selection

    Science.gov (United States)

    Olender, M.; Krenczyk, D.

    2017-08-01

    The opportunity which opens before manufacturers on the dynamic market, especially before those from the sector of the small and medium-sized enterprises, is associated with the use of the virtual organizations concept. The planning stage of such organizations could be based on supporting decision-making tasks using the tools and formalisms taken from the game theory. In the paper the model of the virtual manufacturing network, along with the practical example of decision-making situation as two person game and the decision strategies with an analysis of calculation results are presented.

  18. New Product Development (NPD) Process - An Example of Industrial Sector

    Science.gov (United States)

    Kazimierska, Marianna; Grębosz-Krawczyk, Magdalena

    2017-12-01

    This aim of this article is to present the process of new product introduction on example of industrial sector in context of new product development (NPD) concept. In the article, the concept of new product development is discussed and the different stages of the process of new electric motor development are analysed taking into account its objectives, implemented procedures, functions and responsibilities division. In the article, information from secondary sources and the results of empirical research - conducted in an international manufacturing company - are used. The research results show the significance of project leader and regular cooperation with final client in the NPD process.

  19. The Kruskal-Szekeres "Extension": Counter-Examples

    Directory of Open Access Journals (Sweden)

    Crothers S. J.

    2010-01-01

    Full Text Available The Kruskal-Szekeres “coordinates” are said to “extend” the so-called “Schwarzschild solution”, to remove an alleged “coordinate singularity” at the event horizon of a black hole at r = 2 m , leaving an infinitely dense point-mass singularity at “the origin” r = 0. However, the assumption that the point at the centre of spherical symmetry of the “Schwarzschild solution” is at “the origin” r = 0 is erroneous, and so the Kruskal- Szekeres “extension” is invalid; demonstrated herein by simple counter-examples.

  20. The Kruskal-Szekeres "Extension": Counter-Examples

    Directory of Open Access Journals (Sweden)

    Crothers S. J.

    2010-01-01

    Full Text Available The Kruskal-Szekeres "coordinates: are said to "extend" the so-called "Schwarzschild solution", to remove an alleged "coordinate singularity" at the event horizon of a black hole at $r = 2m$, leaving an infinitely dense point-mass singularity at "the origin" $r = 0$. However, the assumption that the point at the centre of spherical symmetry of the "Schwarzschild solution" is at "the origin" $r = 0$ is erroneous, and so the Kruskal-Szekeres "extension" is invalid; demonstrated herein by simple counter-examples.

  1. Tempered fractional Feynman-Kac equation: Theory and examples.

    Science.gov (United States)

    Wu, Xiaochao; Deng, Weihua; Barkai, Eli

    2016-03-01

    Functionals of Brownian and non-Brownian motions have diverse applications and attracted a lot of interest among scientists. This paper focuses on deriving the forward and backward fractional Feynman-Kac equations describing the distribution of the functionals of the space and time-tempered anomalous diffusion, belonging to the continuous time random walk class. Several examples of the functionals are explicitly treated, including the occupation time in half-space, the first passage time, the maximal displacement, the fluctuations of the occupation fraction, and the fluctuations of the time-averaged position.

  2. GPR and GPS data integration: examples of application in Antarctica

    Directory of Open Access Journals (Sweden)

    S. Gandolfi

    2001-06-01

    Full Text Available Ground Penetrating Radar (GPR and Global Positioning System (GPS techniques were employed in snow accumulation studies during the Italian leg of the International Trans-Antarctic Scientific Expedition (ITASE. The acquired data were useful both for glaciological and climatological studies. This paper presents some results obtained by GPR and GPS data integration employed to determine accumulation/ablation processes along the profile of the traverse that show how the snow-sublayer thickness can vary quickly in just a few kilometres. Some examples of data integration employed in detection and characterisation of buried crevasses are also presented.

  3. Pentaho 5.0 reporting by example beginner's guide

    CERN Document Server

    Mattío, Mariano García

    2013-01-01

    This is a Cookbook with easy-to-follow recipes, containing practical and detailed examples which are all fully backed up with code, illustrations, and tips to dig deep into Backbone.js.This book is great for JavaScript developers who want to learn how to build advanced frontend applications with the Backbone.js framework. This book can be used in educational institutions to teach students how to build frontend applications in an MVC manner.It's assumed that you have some experience in jQuery, and are familiar with HTML.

  4. Examples of superconducting technology application: Sensing and interfacing

    Science.gov (United States)

    Kunert, J.; Ijsselsteijn, R.; Il'ichev, E.; Brandel, O.; Oelsner, G.; Anders, S.; Schultze, V.; Stolz, R.; Meyer, H.-G.

    2017-07-01

    Technological processes for the fabrication of low- and high-Tc Josephson junctions, aimed for certain applications, are described. On the one hand, the integration of low-Tc superconductor digital electronics with superconducting sensor arrays enables input signal processing with quantum limited resolution at millikelvin temperatures. We describe this mixed signal superconductor technology for analogue sensor readout and signal multiplexing for operating temperatures down to 300 mK. On the other hand, by making use of modern high-Tc Josephson junction technology, sensitive magnetometers, which require a modest cooling power, can be developed. Examples of the application of the mentioned processes are shown.

  5. JPL multipolarization workstation - Hardware, software and examples of data analysis

    Science.gov (United States)

    Burnette, Fred; Norikane, Lynne

    1987-01-01

    A low-cost stand-alone interactive image processing workstation has been developed for operations on multipolarization JPL aircraft SAR data, as well as data from future spaceborne imaging radars. A recently developed data compression technique is used to reduce the data volume to 10 Mbytes, for a typical data set, so that interactive analysis may be accomplished in a timely and efficient manner on a supermicrocomputer. In addition to presenting a hardware description of the work station, attention is given to the software that has been developed. Three illustrative examples of data analysis are presented.

  6. Iconographies for Children and Development of Imaginary: Emblematic Examples

    Directory of Open Access Journals (Sweden)

    Chiara Lepri

    2016-07-01

    Full Text Available The illustration for children is set up as an artistic-narrative language acting with extreme power and incisiveness on the creation of the visual imaginary, whether it be 'simple' set to the verbal or complementary text, or totally 'unhooked' from that in the story function, as it happens, for example, in the silent books. Those involved in educational sciences and those who approach children's literature should probe the illustrator's point of view, particularly when the latter is shrewd and conscious and, at the same time, freely expresses a remarkable artistic sensitivity in the performance of his/her job.

  7. Is bioluminescent turbulence an example of self-organized critically?

    Science.gov (United States)

    Noever, David; Cronise, Raymond

    1994-06-01

    When mechanically stimulated by flow, some marine cells react by flashing blue light or bioluminescing. The flash response give a relatively non-invasive measure of turbulent behavior which lends itself readily and quantitatively to statistical models of fluid structure. We report substantial agreement between a series of experiments performed using stimulated light from the bioluminescence of seawater flowing through a glass pipe and theoretical predictions based on models proposed for describing a self-organized critical phenomenon. In this way, bioluminescent turbulent flow can be taken as a natural and potentially robust example connecting long-held scaling problems in turbulence to recent thinking on fractals and self-organized critically.

  8. Introduction to Wireless Localization With iPhone SDK Examples

    CERN Document Server

    Chan, Eddie C L

    2012-01-01

    This book provides a comprehensive overview of the entire landscape of both outdoor and indoor wireless positioning, and guides the reader step by step in the implementation of wireless positioning applications on the iPhone. Explanations of fundamental positioning techniques are given throughout the text, along with many programming examples, providing the reader with an independent, practical, and enjoyable learning of the material while gaining a real feel for the subject.  Provides an accessible introduction to positioning technologies such as Global Positioning System and Wi-Fi posi

  9. Creating robust vocabulary frequently asked questions and extended examples

    CERN Document Server

    Beck, Isabel L

    2008-01-01

    Bringing Words to Life has enlivened the classrooms of hundreds of thousands of teachers. Responding to readers' success stories, practical questions, and requests for extended examples, this ideal volume builds on the groundbreaking work of Bringing Words to Life. The authors present additional tools, tips, and detailed explanations of such questions as which words to teach, when and how to teach them, and how to adapt instruction for English language learners. They provide specific instructional sequences, including assessments, for grades K-2, 3-5, 6-8, and 9-12, as well as interactive less

  10. EXTRACTING_WORDS_POLARITY_WITH_DEFINITION_AND_EXAMPLES

    OpenAIRE

    Tariq Naeem; Fazal Masud Kundi; Sheikh Muhammad Saqib

    2017-01-01

    Abstract- Text analytics are not only the need of readers but are also helpful for the researchers of opinion mining. During reading there are a lot of words which are not understandable for the readers, so the readers require a dictionary then. Finding a particular word in a dictionary takes quite some time, and the reader may very well be distracted. So there is a need of such analytics that user can find out definitions, examples on the spot. The authors propose a work which can not only s...

  11. Acquiring General Iterative Concepts by Reformulating Explanations of Observed Examples.

    Science.gov (United States)

    1987-12-01

    CODES I&16 SUBJECT TERMS (Continue on revitn if nectsuty and identify by block number) FIELD GROUP SUE-GROUIP -, artificial intelligence, machine...N00014-86-K-0309, by the National Science Foundation under grant NSF IST 85-11542, and by a University of Illinois Cognitive Science/ Artificial ...Conference o, Arificiel InteLigence . pp 221-22> \\1ilan. 1 alv kugJsI I h Holder, L B., "Discovering Substructures in Examples," \\IS. Thesis (in preparation

  12. Vaadin 7 UI design by example beginner's guide

    CERN Document Server

    Duarte, Alejandro

    2013-01-01

    This book is a hands-on Beginner's Guide for developers who are new to Vaadin and/or Vaadin UI components. The book will teach readers through examples to use each of the exciting components to build and add various aspects of the user interface to their web apps.If you have experience with the Java language and want to create web applications that look good without having to deal with HTML, XML, and JavaScript, this book is for you. Basic Java programming skills are required, but no web development knowledge is needed at all.

  13. Measuring of customer satisfaction on example of Delta DMD

    Directory of Open Access Journals (Sweden)

    Kostić Ela

    2010-01-01

    Full Text Available Companies which do business in today's competitive environment, has to continuously work on improvement of theirs products and services, based on customers' needs. Most widely used method for examine customer expectations and measuring satisfaction is researches, which goal is to evaluate company performance from customer angle and to give management tool for strategic planning. Surveys results have to be used as a base for defining improvements areas. In this article is shown example of company Delta DMD which do customer satisfaction researches twice a year, since 2007, and results of latest researches with guidelines for further improvements in company. .

  14. Human Rights and Vulnerability. Examples of Sexism and Ageism

    Directory of Open Access Journals (Sweden)

    Mª DEL CARMEN BARRANCO AVILÉS

    2015-12-01

    Full Text Available A human rights based approach applied to the idea of ‘vulnerable group’ connects vulnerability and structural discrimination. The Convention on the Rights of Persons with Disability provides some elements that allow to state that we are facing a new paradigm in the International Human Rights Law. One of the keys for the understanding of this new framework is the assumption of the disadvantage related to vulnerability as, at least in a part, socially built and ideologically justified. Sexism and ageism are examples of how ideologies reinforce vulnerability of women, children and aged persons transforming them in groups which members are in risk of discrimination.

  15. Prime Example Ingress Reframing the Pervasive Game Design Framework (PGDF

    Directory of Open Access Journals (Sweden)

    Heinrich Söbke

    2017-06-01

    Full Text Available The growing availability of mobile communication infrastructure over the last decade has contributed significantly to the maturity of Pervasive Gaming. The massive success of games such as Ingress and Pokémon Go made pervasive gaming a viable option for transforming learning. By its adaptability to location and context, pervasive technology is a valuable support for the design of engaging learning experiences. Despite profound examples of pervasive gaming as learning tool, there is still a lack of reliable methodologies to construct purposeful pervasive learning experiences. The Pervasive Game Design Framework (PGDF is intended to fill this gap. In this article, we present the PGDF using the example of Ingress. Ingress is a prominent pervasive game, as it has received huge attention since its appearance in 2012. A large community of players and third-party-tool suppliers has created a rich set of experiences since then. In this research, we examine Ingress according to PGDF’s categories based on a survey among long-term Ingress players (N=133. Founded on this analysis we identify three main benefits for Ingress players. Furthermore, we discuss the consequences of these findings on the PGDF. Summarizing, this work strengthens the applicability of the PGDF, in order to enable the construction of enriched pervasive learning experiences.

  16. Usability Guidelines for Product Recommenders Based on Example Critiquing Research

    Science.gov (United States)

    Pu, Pearl; Faltings, Boi; Chen, Li; Zhang, Jiyong; Viappiani, Paolo

    Over the past decade, our group has developed a suite of decision tools based on example critiquing to help users find their preferred products in e-commerce environments. In this chapter, we survey important usability research work relative to example critiquing and summarize the major results by deriving a set of usability guidelines. Our survey is focused on three key interaction activities between the user and the system: the initial preference elicitation process, the preference revision process, and the presentation of the systems recommendation results. To provide a basis for the derivation of the guidelines, we developed a multi-objective framework of three interacting criteria: accuracy, confidence, and effort (ACE). We use this framework to analyze our past work and provide a specific context for each guideline: when the system should maximize its ability to increase users' decision accuracy, when to increase user confidence, and when to minimize the interaction effort for the users. Due to the general nature of this multi-criteria model, the set of guidelines that we propose can be used to ease the usability engineering process of other recommender systems, especially those used in e-commerce environments. The ACE framework presented here is also the first in the field to evaluate the performance of preference-based recommenders from a user-centric point of view.

  17. Task-oriented display design - Concept and example

    Science.gov (United States)

    Abbott, Terence S.

    1989-01-01

    The general topic was in the area of display design alternatives for improved man-machine performance. The intent was to define and assess a display design concept oriented toward providing this task-oriented information. The major focus of this concept deals with the processing of data into parameters that are more relevant to the task of the human operator. Closely coupled to this concept of relevant information is the form or manner in which this information is actually presented. Conventional forms of presentation are normally a direct representation of the underlying data. By providing information in a form that is more easily assimilated and understood, a reduction in human error and cognitive workload may be obtained. A description of this proposed concept with a design example is provided. The application for the example was an engine display for a generic, twin-engine civil transport aircraft. The product of this concept was evaluated against a functionally similar, traditional display. The results of this evaluation showed that a task-oriented approach to design is a viable concept with regard to reducing user error and cognitive workload. The goal of this design process, providing task-oriented information to the user, both in content and form, appears to be a feasible mechanism for increasing the overall performance of a man-machine system.

  18. Task-oriented display design: Concept and example

    Science.gov (United States)

    Abbott, Terence S.

    1989-01-01

    The general topic was in the area of display design alternatives for improved man-machine performance. The intent was to define and assess a display design concept oriented toward providing this task-oriented information. The major focus of this concept deals with the processing of data into parameters that are more relevant to the task of the human operator. Closely coupled to this concept of relevant information is the form or manner in which this information is actually presented. Conventional forms of presentation are normally a direct representation of the underlying data. By providing information in a form that is more easily assimilated and understood, a reduction in human error and cognitive workload may be obtained. A description of this proposed concept with a design example is provided. The application for the example was an engine display for a generic, twin-engine civil transport aircraft. The product of this concept was evaluated against a functionally similar, traditional display. The results of this evaluation showed that a task-oriented approach to design is a viable concept with regard to reducing user error and cognitive workload. The goal of this design process, providing task-oriented information to the user, both in content and form, appears to be a feasible mechanism for increasing the overall performance of a man-machine system.

  19. International Relations and the environment: practical examples of environmental multilateralism

    Directory of Open Access Journals (Sweden)

    Filipa Tiago Gomes

    2012-01-01

    Full Text Available The “environmental crisis” we experience today and the international community’s struggle to develop environmental standards to reach the epic “sustainable development” are widely known topics. What is needed, then, is an urgent and determined practice, which is only possible if international governance is structured, coherent and effective. The optimization of Environmental Multilateralism (the joining of what are considered the “driving forces” of Environmental International Relations: Law, Politics and international Diplomacy contributes greatly to this end. To understand its basic concepts and systems, as for example, its actors, negotiation and implementation of Multilateral Environmental Agreements (MEAs and the carrying out of their Regimes, as well as their development in the United Nations, these are all crucial elements for its improvement and optimization. The United Nations Conference on Environment and Development (Rio de Janeiro, 1992 and “its” Conventions are important examples in the history of Environmental Multilateralism, still very up-to-date not only due to the 20th anniversary of the “Rio Conference” but also due to the continuity and importance that the “Rio Conventions” and their Conferences of Parties (COP still have. This papers aims to analyze this area of studies transversal to International Relations and to the Environment, namely by studying the relation between the theory of Environmental Multilateralism and its practice.

  20. Your wish is my command programming by example

    CERN Document Server

    2001-01-01

    As user interface designers, software developers, and yes-as users, we all know the frustration that comes with using "one size fits all" software from off the shelf. Repeating the same commands over and over again, putting up with an unfriendly graphical interface, being unable to program a new application that you thought of yourself-these are all common complaints. The inflexibility of today''s computer interfaces makes many people feel like they are slaves to their computers. Shouldn''t it be the other way around? Why can''t technology give us more "custom-fitting" software? On the horizon is a new technology that promises to give ordinary users the power to create and modify their own programs. Programming by example (PBE) is a technique in which a software agent records a user''s behavior in an interactive graphical interface, then automatically writes a program that will perform that behavior for the user. Your Wish is My Command: Programming by Example takes a broad look at this new technology. In the...

  1. Medical rationing: the implicit result of Leadership by Example.

    Science.gov (United States)

    McLean, Thomas R

    2003-01-01

    The Institute of Medicine (IOM) has released the latest publication in its campaign to curtail medical error: Leadership by Example: Coordinating Government Roles in Improving Health Care Quality. In this publication, the IOM recommends that the government utilize its position as the country's largest purchaser of healthcare to institute unified performance standards, create appropriate incentives to improve quality of care, and develop a system to disseminate provider-specific quality information to the public. The author examines these recommendations and the contents of IOM's prior publications and concludes that necessary predicates of IOM's vision are rationing of care and a two-tiered system of healthcare. Thus, if the IOM's recommendations are carried out, the author envisions a healthcare system in which truly state-of-the-art care can only be purchased out of pocket. He concludes that, although Leadership by Example is a rational plan to address escalating healthcare costs, it is unclear both whether the American public would support it if the IOM were explicit about its ultimate impact, and whether the recommendations, in the long run, will prove to be a good thing.

  2. Gnosticism and esotericism: an example from Russian new religiosity

    Directory of Open Access Journals (Sweden)

    Vadim Zhdanov

    2008-01-01

    Full Text Available Time and again, the terms gnosticism and esotericism appear in connection with one another. Most esoteric teachings, for example, draw on the higher knowledge of the secrets of nature or deity. The terms esoteric and esotericism even surface in connection with antique gnosticism—and this is not a rare occurrence. Just think of the famous definition of gnosis suggested by leading scholars in the field in Messina in 1966. According to this definition, gnosis is the ‘knowledge of divine mysteries, which is reserved for the elite’. And just as Christian apologists saw gnosis as the source of all heresy, so today it is viewed as the source of all esotericism—at least from a theological point of view. In spite of the fact that this thesis is not historically tenable, given that western esotericism did not start until the time of the Renaissance, one cannot ignore the fact that gnosis and esotericism are multiply interwoven with each other. The author sketches the dogmatics and the history of a new religious movement which created quite a furore in the Ukraine and Russia during the first half of the 1990s. On the basis of this sketch of the ‘Great White Brotherhood Usmalos’, he then tries to apply the terms gnosticism and esotericism to this example. Proceeding this way, the author sheds light on both the level of its mode of thought as well as its form of life.

  3. Inter-disciplinarity in sport sciences: The neuroscience example.

    Science.gov (United States)

    Fargier, Patrick; Collet, Christian; Moran, Aidan; Massarelli, Raphaël

    2017-02-01

    Sport science is a relatively recent domain of research born from the interactions of different disciplines related to sport. According to the European College of sport science ( http://sport-science.org ): "scientific excellence in sport science is based on disciplinary competence embedded in the understanding that its essence lies in its multi- and interdisciplinary character". In this respect, the scientific domain of neuroscience has been developed within such a framework. Influenced by the apparent homogeneity of this scientific domain, the present paper reviews three important research topics in sport from a neuroscientific perspective. These topics concern the relationship between mind and motor action, the effects of cognition on motor performance, and the study of certain mental states (such as the "flow" effect, see below) and motor control issues to understand, for example, the neural substrates of the vertical squat jump. Based on the few extensive examples shown in this review, we argue that by adopting an interdisciplinary paradigm, sport science can emulate neuroscience in becoming a mono-discipline.

  4. Examples of Pre-College Programs that Teach Sustainability

    Science.gov (United States)

    Passow, M. J.

    2015-12-01

    Programs to help pre-college students understand the importance of Sustainability can be found around the world. A key feature for many is the collaboration among educators, researchers, and business. Two examples will be described to indicate what is being done and goals for the future. "Educação para a Sustentabilidade" ("Education for Sustainability", http://sustentabilidade.colband.net.br/) developed at the Colegio Bandeirantes in Sao Paulo, Brazil, is a popular extracurricular offering at one of Brazil's top schools that empowers students to investigate major issues facing their country and the world. They recognized that merely knowing is insufficient, so they have created several efforts towards an "environmentally friendly, socially just, and economically viable" world. The Education Project for Sustainability Science interacts with students in various grade levels within the school, participates in sustainability initiatives in other parts of the nation, and communicates electronically with like-minded programs in other countries. A second example will spotlight the CHANGE Viewer (Climate and Health Analysis for Global Education Viewer, http://climatechangehumanhealth.org/), a visualization tool that uses NASA World Wind to explore climate science through socio-economic datasets. Collaboration among scientists, programmers, and classroom educators created a suite of activities available to teach about Food Security, Water Resources, Rising Sea Level, and other themes.

  5. Hinduism and death with dignity: historic and contemporary case examples.

    Science.gov (United States)

    Dewar, Rajan; Cahners, Nancy; Mitchell, Christine; Forrow, Lachlan

    2015-01-01

    An estimated 1.2 to 2.3 million Hindus live in the United States. End-of-life care choices for a subset of these patients may be driven by religious beliefs. In this article, we present Hindu beliefs that could strongly influence a devout person's decisions about medical care, including end-of-life care. We provide four case examples (one sacred epic, one historical example, and two cases from current practice) that illustrate Hindu notions surrounding pain and suffering at the end of life. Chief among those is the principle of karma, through which one reaps the benefits and penalties for past deeds. Deference to one's spouse or family is another important Hindu value, especially among Hindu women, which can impact the decision-making process and challenge the Western emphasis on autonomy. In addition, the Hindu embrace of astrology can lead to a desire to control the exact time of death. Confounding any generalizations, a Hindu patient may reject or accept treatments based on the individual patient's or family's interpretation of any given tradition. Through an awareness of some of the fundamental practices in Hinduism and the role of individual interpretation within the tradition, clinicians will be better able to support their Hindu patients and families at the end of life. Copyright 2015 The Journal of Clinical Ethics. All rights reserved.

  6. Examples to Keep the Passion for the Geosciences

    Science.gov (United States)

    Fernández Raga, María; Palencia Coto, Covadonga; Cerdà, Artemi

    2014-05-01

    It is said that the beasts can smell fear. The translation to education is that students know when our vocation is really teaching or when you are teaching as a result of the sequence of events like a side effect of an investigating vocation path. But to become a good teacher, you need to love teaching!!! Education work requires a dynamic appeal by the students. It should be entertaining, motivating, interactive and dynamic. In this session I will present several tips and examples to get attention on your geology sessions: 1. The teacher should maintain a high interest in the subject of your work. Motivation is contagious!!!!If you show passion the other will feel it. 2. Change the attitude of students. Some activities can help you to do that like asking for the preparation of an experiment, and analyzing the results. Some examples will be shown. 3. Arouse the curiosity of the students. Some strategies could be asking questions in novel, controversial or inconsistent ways, asking conceptual conflicts and paradox that looks not expected from what is studied or 4. Use some tools to get the attention of the students. Examples of these tools can be Google Maps and Google Earth (teaching them to design routes and marking studies), Google drive (to create documents online in a team and file sharing), Google plus (to hang interesting news). 5. Examine students each week. Although it will be laborious, their work and learning will be more gradual. 6. Increase levels of competition among peers. 7. Relate what you know with what you learn. It is very important to be aware of the basis on which pupils, through prior knowledge test match. 8. Feel competent. Teacher's confidence is vital when teaching a class. You must be aware of our weaknesses and humble, but our nerves should help us to improve the quality of our classes. 9. Individualized teaching and learning. Numerous psychological and sociological studies suggest that the existence of social networks contribute to the

  7. Zero Energy Buildings – Design Principles and Built Examples

    DEFF Research Database (Denmark)

    Designing a zero energy building is a complicated task, and in order to achieve good results it is necessary to include knowledge from a range of sources. Therefore, cooperation is required between different professions and between generalists and specialists from the very beginning of the process...... knowledge must be acquired, depending on the project in question. Through a cross-disciplinary approach to architecture and building design, and based on an integrated design process, this publication will: • introduce a number of design strategies and technologies which are particularly important...... for the development of zero energy houses. These strategies and technologies are illustrated through simple design principles and built examples • identify technical and architectural potentials and challenges related to design strategies of crucial importance to the development of zero energy houses • identify...

  8. Quantum theory and statistical thermodynamics principles and worked examples

    CERN Document Server

    Hertel, Peter

    2017-01-01

    This textbook presents a concise yet detailed introduction to quantum physics. Concise, because it condenses the essentials to a few principles. Detailed, because these few principles –  necessarily rather abstract – are illustrated by several telling examples. A fairly complete overview of the conventional quantum mechanics curriculum is the primary focus, but the huge field of statistical thermodynamics is covered as well. The text explains why a few key discoveries shattered the prevailing broadly accepted classical view of physics. First, matter appears to consist of particles which, when propagating, resemble waves. Consequently, some observable properties cannot be measured simultaneously with arbitrary precision. Second, events with single particles are not determined, but are more or less probable. The essence of this is that the observable properties of a physical system are to be represented by non-commuting mathematical objects instead of real numbers.  Chapters on exceptionally simple, but h...

  9. Toyota production system - one example to shipbuilding industry

    Directory of Open Access Journals (Sweden)

    Delmo Alves de Moura

    2017-09-01

    Full Text Available The shipbuilding system can use the techniques used in the Toyota Production System as an example for its production process. Production should be lean, minimize defects, stop production and reduce or eliminate inventories. Lean production is regarded by many as simply an enhancement of mass production methods, whereas agility implies breaking out of the mass production mould and producing much more highly customized products - where the customer wants them in any quantity. In a product line context, it amounts to striving for economies of scope, rather than economies of scale ideally serving ever smaller niche markets, even quantities of one, without the high cost traditionally associated with customization. A lean company may be thought of as a very productive and cost efficient producer of goods or services.

  10. Mechanics, waves and thermodynamics an example-based approach

    CERN Document Server

    Jain, Sudhir Ranjan

    2016-01-01

    The principles of classical physics, though superseded in specific fields by such theories as quantum mechanics and general relativity, are still of great importance in a broad range of applications. The book presents fundamental concepts of classical physics in a coherent and logical manner. It discusses important topics including the mechanics of a single particle, kinetic theory, oscillations and waves. Topics including the kinetic theory of gases, thermodynamics and statistical mechanics are discussed, which are normally not present in the books on classical physics. The fundamental concepts of energy, momentum, mass and entropy are explained with examples. Discussion on concepts of thermodynamics is presented along with the simplified explanation on Caratheodory's axioms. It covers chapters on wave motion and statistical physics, useful for the graduate students. Each concept is supported with real-life applications on several concepts including impulse and collision, Bernoulli's equation, and friction.

  11. Time series analysis and its applications with R examples

    CERN Document Server

    Shumway, Robert H

    2017-01-01

    The fourth edition of this popular graduate textbook, like its predecessors, presents a balanced and comprehensive treatment of both time and frequency domain methods with accompanying theory. Numerous examples using nontrivial data illustrate solutions to problems such as discovering natural and anthropogenic climate change, evaluating pain perception experiments using functional magnetic resonance imaging, and monitoring a nuclear test ban treaty. The book is designed as a textbook for graduate level students in the physical, biological, and social sciences and as a graduate level text in statistics. Some parts may also serve as an undergraduate introductory course. Theory and methodology are separated to allow presentations on different levels. In addition to coverage of classical methods of time series regression, ARIMA models, spectral analysis and state-space models, the text includes modern developments including categorical time series analysis, multivariate spectral methods, long memory series, nonli...

  12. Multiplex versus multiple taxonomy of paraphilia: case example.

    Science.gov (United States)

    Lehne, Gregory K; Money, John

    2003-01-01

    Several different paraphilias are presently diagnosed in some individuals whereas a more parsimonious taxonomy would be that of one multiplex paraphilia. A multiplex paraphilia may be expressed by variations of content at different times in an individual's life or in different situations. The present case example shows the unfolding of a multiplex paraphilia over a lifetime. At age 7 the subject was dressed in public as a girl wearing a diaper as a humiliation for bed-wetting. This experience had 3 paraphilic components that were separately manifested at different times in his life: fetishistic transvestism, pedophilic incest, and infantilism. A multiplex paraphilia taxonomy may lead to improved identification of etiology, prognosis, and treatment of paraphilia.

  13. From Literary Classics to Twitter: Some Examples of Retelling

    Directory of Open Access Journals (Sweden)

    Claudia Cao

    2014-11-01

    Full Text Available After having defined the “microliterature” among the digital textual forms and after a brief analysis of its origin, this paper gives an overview of the three main narrative forms risen from Twitter, with particular attention for the widespread phenomenon of retellings. The aim of this study is to examine the two more diffused typologies of serial retelling ‒ the collective and the authorial form ‒ throughout the concept of convergence theorized by Jenkins (2006. Finally, the last example taken into consideration ‒ Twitterature (Penguin 2009, sixty retellings of literary classics reproducing the Twitter texts ‒ testifies the circularity and reciprocity of the osmosis process between literature and new media.

  14. Static Mapping of Functional Programs: An Example in Signal Processing

    Directory of Open Access Journals (Sweden)

    Jack B. Dennis

    1996-01-01

    Full Text Available Complex signal-processing problems are naturally described by compositions of program modules that process streams of data. In this article we discuss how such compositions may be analyzed and mapped onto multiprocessor computers to effectively exploit the massive parallelism of these applications. The methods are illustrated with an example of signal processing for an optical surveillance problem. Program transformation and analysis are used to construct a program description tree that represents the given computation as an acyclic interconnection of stream-processing modules. Each module may be mapped to a set of threads run on a group of processing elements of a target multiprocessor. Performance is considered for two forms of multiprocessor architecture, one based on conventional DSP technology and the other on a multithreaded-processing element design.

  15. Biomimetics materials, structures and processes : examples, ideas and case studies

    CERN Document Server

    Bruckner, Dietmar; Hellmich, Christian; Schmiedmayer, Heinz-Bodo; Stachelberger, Herbert; Gebeshuber, Ille

    2011-01-01

    The book presents an outline of current activities in the field of biomimetics and integrates a variety of applications comprising biophysics, surface sciences, architecture and medicine. Biomimetics as innovation method is characterised by interdisciplinary information transfer from the life sciences to technical application fields aiming at increased performance, functionality and energy efficiency. The contributions of the book relate to the research areas: - Materials and structures in nanotechnology and biomaterials - Biomimetic approaches to develop new forms, construction principles and design methods in architecture - Information and dynamics in automation, neuroinformatics and biomechanics Readers will be informed about the latest research approaches and results in biomimetics with examples ranging from bionic nano-membranes to function-targeted design of tribological surfaces and the translation of natural auditory coding strategies.

  16. Fatigue Testing of Dental Bridges on Selected Examples

    Directory of Open Access Journals (Sweden)

    Urban Dariusz

    2017-03-01

    Full Text Available The paper presents example tests of the functional quality of selected designs of dental bridges. These were: porcelain bridges on a metal base (cobalt based alloy, porcelain bridges on a zirconia base (zirconia ceramic – Zirkon Zahn, and full zirconia bridges (Zirkon Zahn. For the purpose of the study, durability of bridges in cyclic fatigue testing was adopted as a measure of their quality. The tests were carried out on a Zwick Roell Z010 universal testing machine. They consisted in cyclic loading and unloading of dental bridges mounted on gypsum models at a loading force of F= 400 [N] and a frequency of load of f= 1 [Hz]. Each bridge was subjected to a cycle of 7200 loads. The results show that there are no significant differences in the functional quality of the bridges.

  17. Human impact on Karst: the example of Lusaka (Zambia.

    Directory of Open Access Journals (Sweden)

    De Waele Jo

    2003-01-01

    Full Text Available Lusaka, the capital of Zambia with over 2,000,000 inhabitants, is built on an extensive plateau composed mainly of schists and dolomitic marbles, constituting a very important aquifer that provides the city with almost half of its drinking water needs. Recent demographic growth, leading to uncontrolled urban expansion, and mismanagement of the water resource and of urban waste has lead, in the past 20 years, to an overexploitation of the aquifer and to a generalised water quality depletion, putting in serious danger the future social and economical development of the capital. This third world city has, for these reasons, become a terrifying example of human impact on a vulnerable karst environment, and if no measures will be taken in the very near future, quality of life in the city will be at serious risk.

  18. Academic Training: Technological challenges for LHC experiments, the CMS example

    CERN Multimedia

    Françoise Benz

    2005-01-01

    2004-2005 ACADEMIC TRAINING PROGRAMME LECTURE SERIES 28 February, 1, 2, 3 & 4 March from 11.00 to 12.00 hrs - Main Auditorium, bldg. 500 Technological challenges for LHC experiments, the CMS example by P. SPHICAS/CERN-PH, G. DISSERTORI/ETH, Zürich, Ch. M. MANNELLI/CERN-PH, G. HALL/Imperial College, London. GB, P. FABBRICATORE/INFN, Genova, I Monday 28 February Design principles and performances of CMS P. Sphicas/CERN-PH Tuesday 1st March Crystal calorimetry in LHC environment G. Dissertori/ETH Zürich, CH Wednesday 2 March Silicon tracking in LHC environment M. Mannelli/CERN-PH Thursday 3 March Radhard fast electronics for LHC experiments G. Hall/Imperial College London, GB Friday 4 March Design principles of thin high field superconducting solenoids P. Fabbricatore/INFN Genova, I ENSEIGNEMENT ACADEMIQUE ACADEMIC TRAINING Françoise Benz 73127 academic.training@cern.ch

  19. Drug design benefits from molecular dynamics: some examples.

    Science.gov (United States)

    Zhang, Ji-Long; Zheng, Qing-Chuan; Chu, Wen-Ting; Zhang, Hong-Xing

    2013-12-01

    With the increasing application of various computer techniques in new drug development, molecular dynamics (MD) simulation, as a promising tool for rational drug design, is playing a more and more vital role. In this review, we initially give a brief recapitulation of relevant basic MD theories, followed by an additional introduction of the current state-of-the-art MD methodologies, mainly involving steered molecular dynamics (SMD) and constant pH molecular dynamics (CpHMD). Both of the methods extend research field of conventional MD simulations. In the end, some interesting examples using these latest MD approaches are also presented to demonstrate their practicability and validity for the study on the ligand-receptor interaction.

  20. Online Practice Course Development with Action Research: A Case Example

    Directory of Open Access Journals (Sweden)

    Khadija Khaja

    2008-12-01

    Full Text Available Despite the proliferation of online courses in social work, questions still exist about learning practice skills in an online instructional environment. This paper describes a case example of an action-oriented approach to the development of an online practice course. Lessons learned from students’ and instructor’s perspectives are shared as well as recommendations for future research relative to course development and evaluation of online courses. The study examined student feedback with respect to their overall learning experience. Findings indicated that involving students in the design and development of an online practice course benefited both students and faculty and can be an effective teaching and learning strategy regardless of the instructional medium used.