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Found 6289 publications

Test software design and implemetation for benchmarking of stateless IPv4/IPv6 translation implementations

Péter Bálint

Publication Name: 2017 40th International Conference on Telecommunications and Signal Processing Tsp 2017

Publication Date: 2017-10-19

Volume: 2017-January

Issue: Unknown

Page Range: 74-78

Description:

There are many available NAT64 implementations, but we can not measure their performance per the standards, due to the lack of complaint testers. The aim of our effort is to design and write the first implementation of a test program that could provide the first answer to these needs. For benchmarking Network Interconnect Devices we could use the recommendation of the 2544 (IP version independent) and the 5180 (IPv6 related) RFCs. But these do not cover the benchmarking of IPv6 translation technologies. There is an IETF draft which covers this topic, the “Benchmarking Methodology for IPv6 Transition Technologies”. This draft covers the transition technologies which contain the translation too. We will use this draft as bases of our design.

Open Access: Yes

DOI: 10.1109/TSP.2017.8075940

The ectoparasitic burden and prevention of some huntable cloven hoofed animals

Gustav Ingo Struck Egri Borisi

Publication Name: Tierarztliche Umschau

Publication Date: 2017-10-01

Volume: 72

Issue: 10

Page Range: 378-386

Description:

This review is an attempt to show the worldwide ectoparasitic burden in deer and antilopes with the aid of some case samples. Animals kept in zoos, lodges/ breeding farms and also in the wild, can considerable suffer and die under the burdens of parasites. The environment plays at this certainly an important role, too. Grooming and mutulism (a symbiotic relationship between two species of organism where both organism benefit from the association), vegetation and climate are only some of these factors. Not least, it should be also mentioned, that certain diseases, which can be transferred by parasites, can not only have intraspecific, but also extraspecific transmission possibilities.

Open Access: Yes

DOI: DOI not available

Effect of temperament on milk production, somatic cell count, chemical composition and physical properties in lacaune dairy sheep breed

Ferenc Pajor Péter Póti Akos Bodnar Gábor Tóth Enikő Hamar Abayné László Gulyás

Publication Name: Mljekarstvo

Publication Date: 2017-09-29

Volume: 67

Issue: 4

Page Range: 261-266

Description:

Effect of temperament on milk yield, lactation length, physico-chemical properties and somatic cell count of Lacaune ewes were evaluated. The investigation was carried out at a sheep farm in the county of Győr-Moson-Sopron. The temperament of 106 Lacaune ewes was measured by the temperament 5-point-scale test (1=very nervous, 5=very quiet) during milking. Furthermore, 42 ewes were randomly selected from a herd of 106 animals for the analysis of milk composition (fat, protein and lactose), pH, electrical conductivity as well as somatic cell count. It was found that the temperament had a significant effect on lactation length and lactation milk production, lactose, electrical conductivity and somatic cell count. Calm ewes had significantly longer lactation (4 score: 220.7 day; 5 score: 201.4 day) as well as higher milk production (4 score: 207.9 kg; 5 score: 193.3 kg) compared to more temperamental animals (2+3 scores: 166.5 day and 135.5 kg; P<0.05). The content of lactose was significantly lower (4.32) in the more temperamental group, while electrical conductivity was higher (4.81 mS cm-1) compared to calmer animals (4.69 % and 4.16 mS cm-1). Additionally, significant differences were found in milk somatic cell count among the temperament categories. Calmer ewes had a lower somatic cell count in milk (5.17 log cm-3) than more temperamental ones (5.67 log cm-3; P<0.05).

Open Access: Yes

DOI: 10.15567/mljekarstvo.2017.0403

Environmental Impacts of Urbanization - Changes of the Ecological Footprint of Commuting in the Urban Region of Budapest

Kondor Attila Csaba Szabó Balázs Cecília Szigeti Kovács Zoltán Egedy Tamás

Publication Name: Teruleti Statisztika

Publication Date: 2017-09-01

Volume: 57

Issue: 5

Page Range: 469-494

Description:

The main aim of this paper is to explore how daily commuting has contributed to the changes of ecological footprint in the Buda-pest urban region since 1990 by using census data of 1990, 2001 and 2011. First, the func-tional urban region of Budapest was delim-ited using the 15% threshold of daily com-muting to work to Budapest in 2001. Accord-ing to international methodology 185 sur-rounding municipalities and Budapest were defined as the urban region. Using data on the transport vehicle of commuting the vol-ume of CO2 emissions was estimated at mu-nicipal level for the 185 municipalities. Final-ly, on the basis of emission values the ecolog-ical footprint of the whole urban region was estimated. Our results show declining ecolog-ical footprint values throughout the 1990s, due to decreasing commuting rates, which is the result of economic restructuring, growing unemployment and less mobility of the la-bour force. However, as commuting in-creased due to economic upswing after 2000 the ecological footprint also grew, the use of motor vehicles (private car and bus) in com-muting substantially and dynamically in-creased. In the reviewed periodspatial struc-ture of commuting significantly changed: rail-commuting shrunk into a few outstanding transport axes, whereas the use of passenger cars increased also in the less booming areas of the urban agglomeration.

Open Access: Yes

DOI: 10.15196/TS570501

Temporal dynamics of object location processing in allocentric reference frame

Peter Galambos György Persa Andrea Kóbor Ágoston Török Ferenc Honbolygó Valéria Csépe Péter Baranyi

Publication Name: Psychophysiology

Publication Date: 2017-09-01

Volume: 54

Issue: 9

Page Range: 1346-1358

Description:

The spatial location of objects is processed in egocentric and allocentric reference frames, the early temporal dynamics of which have remained relatively unexplored. Previous experiments focused on ERP components related only to egocentric navigation. Thus, we designed a virtual reality experiment to see whether allocentric reference frame-related ERP modulations can also be registered. Participants collected reward objects at the end of the west and east alleys of a cross maze, and their ERPs to the feedback objects were measured. Participants made turn choices from either the south or the north alley randomly in each trial. In this way, we were able to discern place and response coding of object location. Behavioral results indicated a strong preference for using the allocentric reference frame and a preference for choosing the rewarded place in the next trial, suggesting that participants developed probabilistic expectations between places and rewards. We also found that the amplitude of the P1 was sensitive to the allocentric place of the reward object, independent of its value. We did not find evidence for egocentric response learning. These results show that early ERPs are sensitive to the location of objects during navigation in an allocentric reference frame.

Open Access: Yes

DOI: 10.1111/psyp.12886

An implicit Method of Fundamental Solutions using twofold domains

Csaba Gáspár

Publication Name: Engineering Analysis with Boundary Elements

Publication Date: 2017-09-01

Volume: 82

Issue: Unknown

Page Range: 194-201

Description:

A novel meshless method is presented. It is based on completing the original problem with an additional one which is defined in the same domain and connected with the original problem through the boundary only. The boundary conditions are enforced by some internal sources appearing in the supplementary problem only. The fundamental solutions are not used explicitly. The two problems are solved simultaneously using computationally quite efficient multi-level tools. No dense and ill-conditioned linear systems have to be solved. Moreover, no external or boundary sources are to be located. The approach can easily be extended to more general elliptic problems in a natural way, since the corresponding fundamental solution is not needed to be known.

Open Access: Yes

DOI: 10.1016/j.enganabound.2017.06.007

The role of customers' involvement in value co-creation behaviour is value co-creation the source of competitive advantage?

Ida Ercsey

Publication Name: Journal of Competitiveness

Publication Date: 2017-09-01

Volume: 9

Issue: 3

Page Range: 51-66

Description:

According to service dominant logic (SDL), customers are always active participants and collaborative partners in exchanges; therefore we should focus on the elements of consumer behaviour that are connected with the value co-creation. By involving the customers in service production, providers can capture customers' needs and maintain their competitiveness. The cutomers' roles may lead to a higher productivity and competitive quality for companies. Previous researches recognized two types of the customers' co-creation behaviour. First, it is the consumers' participation behaviour. Then, the other one is the consumers' citizenship behaviour. The goal of our study is to examine how the level of involvement influences two kinds of behaviour mentioned. Besides, we explore if respondents' participation behaviour or citizenship behaviour influence the perceived value of service provided. In 2015, for examination of our research questions, we carried out a quantitative research and applied quota sampling to obtain data from two target groups (X and Y generations). The activity and attitude of individuals related to performance of an extra-role in service interaction is less favourable than the required in-role behaviour. According to the results of our survey, the level of involvement influences the customers' mandatory behaviour and volunteer behaviour when working on a co-creation value. Empirically verifiable, the service users' activity in a value creation affects customers' value of the service.

Open Access: Yes

DOI: 10.7441/joc.2017.03.04

Which players will leave their community? Predicting guild abandonments in world of warcraft game data

Gergely Posfai Gabor Magyar L. T. Kóczy

Publication Name: Ifsa Scis 2017 Joint 17th World Congress of International Fuzzy Systems Association and 9th International Conference on Soft Computing and Intelligent Systems

Publication Date: 2017-08-30

Volume: Unknown

Issue: Unknown

Page Range: Unknown

Description:

World of Warcraft (WoW) is one of the most popular massively multiplayer online role-playing games (MMORPGs) having more than 10 million subscribers over the world. In order to engage and retain users understanding and predicting their behavior can be very useful for game developers. An important component of WoW are so-called guilds, which are social communities whose members can act together efficiently to accomplish more difficult goals and also provide a social atmosphere in which the game might be more entertaining. In this paper, we build predictive models to forecast which of the players will leave their guild in the close future. Our best model uses fuzzy c-means clustering to capture groups of similar guilds, that serve as the basis of an ensemble model, which computes predictions for each cluster separately and combines individual predictions into one final prediction using the memberships of the fuzzy clusters. Empirical analysis on WoW game data shows that our methods convincingly outperform the only existing method in the literature. To ensure transparency and reproducibility we publish the source codes of the research and also provide a Docker image, which makes it possible for anyone who has Docker installed to reproduce all of our results with a single command.

Open Access: Yes

DOI: 10.1109/IFSA-SCIS.2017.8023234

Behavioral analysis of fuzzy cognitive map models by simulation

Miklós F. Hatwágner L. T. Kóczy Vesa A. Niskanen

Publication Name: Ifsa Scis 2017 Joint 17th World Congress of International Fuzzy Systems Association and 9th International Conference on Soft Computing and Intelligent Systems

Publication Date: 2017-08-30

Volume: Unknown

Issue: Unknown

Page Range: Unknown

Description:

Fuzzy Cognitive Maps (FCM) are widely applied to support decision making and for the prediction of the future behavior of systems. In this paper several real expert-defined models of an organization will be investigated. Simulations were performed in order to examine the asymptotic behavior of these models, especially to find (all) fixed point attractors, or to discover chaotic behavior. A sigmoid type of inference function was applied, and the effect of the steepness parameter on simulation results was investigated, too. It will be shown by several examples that the steepness parameter may even change the number and values of the final state vectors. In the end, the systematic study of the behavior of the models in terms of the changes of the (uncertain) relationship values among system components were studied.

Open Access: Yes

DOI: 10.1109/IFSA-SCIS.2017.8023345