The long tail or the short tail: The category-specific impact of eWOM on sales distribution

2011 ◽  
Vol 51 (3) ◽  
pp. 466-479 ◽  
Author(s):  
Jung Lee ◽  
Jae-Nam Lee ◽  
Hojung Shin
Keyword(s):  
Long Tail ◽  
Short Tail ◽  
Specific Impact

scholarly journals Two morphologically distinct forms of Demodex mites found in dogs with canine demodicosis from Vladivostok, Russia

2017 ◽  
Vol 67 (1) ◽  
pp. 82-91 ◽  
Author(s):  
Tatyana Vladimirovna Moskvina
Keyword(s):  
Measurement Data ◽  
Total Body Length ◽  
Long Tail ◽  
Demodex Canis ◽  
Short Tail ◽  
Significant Difference ◽  
Total Body ◽  
Student’S T ◽  
Demodex Mites ◽  
Student’S T Test

AbstractThe aim of this study was to investigate the morphology of Demodex canis and Demodex sp. cornei found in six dogs with canine demodicosis. A deep skin scraping technique was used for Demodex mite detection. Measurement data of 52 adult D. canis mites (26 females, 25 males and one specimen whose sex could not be determined) and 39 adult Demodex sp. cornei mites (22 females, 14 males and three specimens whose sex could not be determined) were reported. The correlation between body size of both Demodex species were estimated by the Student’s t-test. There was a significant correlation between short-tail and long-tail forms and total body length and length of the podosoma and opisthosoma (p<0.05). A significant difference was not found between the length of the gnathosoma and short-tail and long-tail forms (p>0.05). Demodex sp. cornei and D. canis, found in dogs from Vladivostok, were smaller than species from other countries. However, the present data did not significantly differ from other studies with D. canis and Demodex sp. cornei descriptions.

scholarly journals Asymptotic weight and maturing rate in mice selected for body conformation

2000 ◽  
Vol 23 (2) ◽  
pp. 235-240 ◽  
Author(s):  
Ricardo J. Di Masso ◽  
Patricia S. Silva ◽  
María Teresa Font
Keyword(s):  
Body Weight ◽  
Genetic Variation ◽  
Growth Patterns ◽  
The Other ◽  
Long Tail ◽  
Antagonistic Selection ◽  
High Body Weight ◽  
High Body ◽  
Short Tail ◽  
Body Conformation

Growth patterns of four lines of mice selected for body conformation were analyzed with the logistic function, in order to provide baseline information about the relationship between asymptotic weight and maturing rate of body weight. Two lines were divergently selected favoring the phenotypic correlation between body weight and tail length (agonistic selection: CBi+, high body weight and long tail; CBi-, low body weight and short tail), whereas the other two lines were generated by a disruptive selection performed against the correlation between the aforementioned traits (antagonistic selection: CBi/C, high body weight and short tail; CBi/L, low body weight and long tail). The logistic parameters A (asymptotic weight) and k (maturing rate) behaved in CBi/C and CBi- mice and in CBi+ females as expected in terms of the negative genetic relationship between mature size and earliness of maturing. An altered growth pattern was found in CBi/L mice and in CBi+ males, because in the former genotype, selected for low body weight, the time taken to mature increased, whereas in the latter, selected for high body weight, there was a non-significant increase in the same trait. In accordance with the selective criterion, different sources of genetic variation for body weight could be exploited: one inversely associated with earliness of maturing (agonistic selection), and the other independent of maturing rate (antagonistic selection), showing that genetic variation of A is partly independent of k.

scholarly journals Femoral morphometry and femur length in mice selected for different body conformations. A potential animal model suitable for QTLs mapping

2007 ◽  
Vol 50 (3) ◽  
pp. 309-319
Author(s):  
R. J. Di Masso ◽  
C. M. Zerpa ◽  
P. S. Silva ◽  
M. T. Font
Keyword(s):  
Animal Model ◽  
Body Weight ◽  
Inbred Strains ◽  
Gender Effects ◽  
Long Tail ◽  
Femur Length ◽  
High Body Weight ◽  
High Body ◽  
Short Tail ◽  
And Gender

Abstract. Four lines of mice derived from the CBi stock, selected for different body conformations (CBi-, low body weight – short tail; CBi+, high body weight – long tail; CBi/L, low body weight – long tail; CBi/C, high body weight – short tail), differ in the biomass sustained per unit of skeleton weight. Femur length was modified in response to artificial selection either for high or low skeleton length. This feature suggests that these lines could be discriminated using the morphometric profile of their femurs. The femurs were obtained from both sexes at 15 weeks of age. A total of 16 measurements were taken on each bone. Genotype and gender effects for almost all measurements (P<0.001) were seen. Genotype x gender interactions (P<0.05) for some length measurements were also found. For sexual dimorphic characters, males had wider and shorter femurs than females. The results of principal components and discriminant analysis showed that the morphometric profile of the femur is a reliable and accurate means of identifying these inbred strains of mice as all female and male animals were assigned to the correct genotype. When the reciprocal hybrids among these genotypes were performed different responses in femur length were observed. So, the underlying genetic differences to this phenotypic differentiation emerge, at least partially, as a consequence of the exploitation of different sources of genetic variation for the trait in each selective procedure, jointly with the effect of simultaneously acting dispersive processes suggesting the potential usefulness of these genotypes as an animal model suitable for the identification of QTLs associated with femur growth.

Opposite effects of short-tail and long-tail class I Myosins on Antigen Processing and Presentation

2012 ◽  
Vol 51 (1) ◽  
pp. 21
Author(s):  
Ana-Maria Lennon-Duménil ◽  
jheimmy Diaz ◽  
Paolo Pierobon ◽  
Maria-Isabel Yuseff ◽  
Danielle Lankar
Keyword(s):  
Antigen Processing ◽  
Class I ◽  
Long Tail ◽  
Short Tail ◽  
Antigen Processing And Presentation

scholarly journals A Hybrid Approach to Recommend Long Tail Items

2018 ◽  
Author(s):  
Diogo Vinícius De Sousa Silva ◽  
Frederico Araújo Durão
Keyword(s):  
Markov Chain ◽  
Markov Chains ◽  
Hybrid Approach ◽  
Recommendation Systems ◽  
Long Tail ◽  
Short Tail ◽  
Node Similarity ◽  
Great Relevance

Techniques in recommendation systems generally focuses on recommending the most important items for a user. The purpose of this work is to generate recommendations focusing on long tail items, and then to conduct the user to less popular items. However, such items are of great relevance to the user. Two techniques from the literature were applied in this study in a hybrid way. The first technique is through markov chains to calculate node similarity of a user item graph. The second technique applies clustering, where items are separated into distinct clusters: popular items (short tail) and non-popular items (long tail). Using the Movielens 100k database, we conducted an experiment to calculate the accuracy, diversity, and popularity of the recommended items. With our hybrid approach we were able to improve the recall by up to 27.97 % when compared to the markov chain-based algorithm, which indicates greater targeting to long tail products. At the same time the recommended items were more diversified and less popular, which indicates greater targeting to long tail products.

scholarly journals Organization of the Human LU Gene and Molecular Basis of the Lua/Lub Blood Group Polymorphism

Blood ◽  
1997 ◽  
Vol 89 (12) ◽  
pp. 4608-4616 ◽  
Author(s):  
Wassim El Nemer ◽  
Cecile Rahuel ◽  
Yves Colin ◽  
Pierre Gane ◽  
Jean Pierre Cartron ◽  
...  
Keyword(s):  
Alternative Splicing ◽  
Blood Group ◽  
Cho Cells ◽  
Transcription Initiation ◽  
Genomic Dna ◽  
Polymorphism Analysis ◽  
Blood Group Antigens ◽  
Long Tail ◽  
Initiation Point ◽  
Short Tail

Abstract The Lutheran (Lu) blood group antigens and the B-cell adhesion molecule (B-CAM) epithelial cancer antigen are carried by recently cloned integral glycoproteins that belong to the Ig superfamily. We have previously shown that the Lu and B-CAM antigens are encoded by the same gene, LU, and that alternative splicing of the primary transcript most likely accounts for the presence of both antigens on two isoforms that differ by the length of their cytoplasmic tails. In the present report, we isolated the human LU gene by cloning a 20-kb HindIII fragment from Lu(a − b+) genomic DNA. The LU gene is organized into 15 exons distributed over 12.5 kb. Alternative splicing of intron 13 generates the 2.5- and 4.0-kb transcript spliceoforms encoding the long tail and the short tail Lu polypeptides, respectively. Sequencing of the major mRNA species (2.5 kb) amplified from human bone marrow, kidney, placenta, and skeletal muscle did not suggest the presence of tissue-specific Lu glycoprotein isoforms. The same transcription initiation point, located 22 bp upstream from the initiation codon, was characterized in several tissues. In agreement with the wide tissue distribution of the Lu messengers, the GC-rich proximal 5′ flanking region of the LU gene does not contain TATA or CAAT boxes, but includes several potential binding sites for the ubiquitous Sp1 transcription factor. In addition, the distal 5′ region, encompassing nucleotides −673 to −764, contains clustered binding sequences for the GATA, CACCC, and Ets transcription factors. Analysis of the coding sequences amplified from genomic DNA of Lu(a + b−) or Lu(a − b+) donors showed a single nucleotide change in exon 3 (A229G) that correlates with an Aci I restriction site polymorphism and results in a His77Arg amino-acid substitution. Polymerase chain reaction/restriction fragment length polymorphism analysis indicated that the A229G mutation is associated with the Lua/Lub blood group polymorphism. When expressed in Chinese hamster ovary (CHO) cells, Lu cDNAs carrying the A229 or the G229 produced cell surface proteins that reacted with anti-Lua or anti-Lub antibodies, respectively, showing that these nucleotides specify the Lua and Lub alleles of the Lutheran blood group locus. CHO cells expressing recombinant short-tail or long-tail Lu glycoproteins reacted as well with anti-Lu as with anti–B-CAM antibodies, providing the definitive proof that the Lu blood group and B-CAM antigens are carried by the same molecules.

Voids in Quenched Nickel

1968 ◽  
Vol 26 ◽  
pp. 266-267
Author(s):  
J. J. Laidler
Keyword(s):  
Electron Beam ◽  
Ambient Temperature ◽  
Cooling Rate ◽  
Three Dimensional ◽  
Cooling Curve ◽  
Polycrystalline Nickel ◽  
Quenching Temperature ◽  
Long Tail ◽  
Diffusion Pump

The presence of three-dimensional voids in quenched metals has long been suspected, and voids have indeed been observed directly in a number of metals. These include aluminum, platinum, and copper, silver and gold. Attempts at the production of observable quenched-in defects in nickel have been generally unsuccessful, so the present work was initiated in order to establish the conditions under which such defects may be formed.Electron beam zone-melted polycrystalline nickel foils, 99.997% pure, were quenched from 1420°C in an evacuated chamber into a bath containing a silicone diffusion pump fluid . The pressure in the chamber at the quenching temperature was less than 10-5 Torr . With an oil quench such as this, the cooling rate is approximately 5,000°C/second above 400°C; below 400°C, the cooling curve has a long tail. Therefore, the quenched specimens are aged in place for several seconds at a temperature which continuously approaches the ambient temperature of the system.

„Long-Tail-Ballon“-FETO Studie zur Behandlung der schweren kongenitalen Zwerchfellhernie (ClinicalTrials.gov: NCT 03431792)

2018 ◽  
Author(s):  
L van Uden ◽  
G Seliger ◽  
M Bergner ◽  
M Entezami ◽  
M Tchirikov
Keyword(s):  
Long Tail

Towards Small-Sized Long Tail Business with the Dual-Directed Recommendation System

2010 ◽  
Vol 130 (2) ◽  
pp. 317-323
Author(s):  
Masakazu Takahashi ◽  
Takashi Yamada ◽  
Kazuhiko Tsuda ◽  
Takao Terano
Keyword(s):  
Recommendation System ◽  
Long Tail
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