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Found 6289 publications

CT based analysis of reworked BGA devices

Imre Fekete István Kozma R. Csontos

Publication Name: 21st Imeko TC 4 International Symposium on Understanding the World Through Electrical and Electronic Measurement and 19th International Workshop on ADC Modelling and Testing

Publication Date: 2016-01-01

Volume: Unknown

Issue: Unknown

Page Range: 288-292

Description:

The widespread use of computed tomography in the electronic field allows for an extended range of measurements to be carried out. High integration devices can be tested easily with μCT, and provide large amount of data to characterize the technology parameters. This paper focuses on the inspection of BGA solder ball geometry and quantification of different properties of the solder arrays.

Open Access: Yes

DOI: DOI not available

The measurement of social capacity / deficit in the regions of the Scandinavian and Visegrad countries

Jenő Zsolt Farkas Róbert Péter Bódi Ferenc

Publication Name: Teruleti Statisztika

Publication Date: 2016-01-01

Volume: 56

Issue: 2

Page Range: 158-182

Description:

The focus of the research was to measure and compare social capacity and anomie between four Scandinavian states (Denmark, Finland, Norway and Sweden) and four post-socialist countries (the Visegrad Group: Czech Republic, Hungary, Poland and Slovakia) in order to analyze similarities and differences. The analysis was conducted utilizing both micro and macro approaches. Four new complex indicators were developed from the social well-being module of the 2012 6. ESS survey. These new complex indicators were used to measure the quality of the society, the quality of life and subjective wellbeing. Macro level analysis consisted of indicators from the database of Eurostat Regions and the 2011 Census that are most used in professional literature. The characteristics of each country then the features of the regions (60 NUTS2 field units) were analyzed using data obtained from micro level surveys utilizing the newly created complex indicators. Following this step, a regional analysis of the aforementioned macro level indicators was completed. The results of these two levels of analysis were compared cross-nationally and regionally. Significant differences were found between the Scandinavian group and the Visegrad group revealing underlying connections supporting the results of other European studies. Namely that the 2008 crisis with respect to subjective well being created far more trauma for individuals in countries with a weak social safety net. The analysis also demonstrated that using complex indicators as well as both a micro and macro approach complement each other bringing about an understanding of nuances and subtle differences not found in singular approaches thus creating a more accurate assessment of the status of the society.

Open Access: Yes

DOI: 10.15196/TS560204

The Measurement of Indirect Effects in Project Appraisal

Mattias Juhász Tünde Vörös Krisztián Koppány

Publication Name: Transportation Research Procedia

Publication Date: 2016-01-01

Volume: 13

Issue: Unknown

Page Range: 114-123

Description:

Imperative for growth is dominating the present economic conditions also influencing decision-making to a large extent. Therefore, the analysis of economic impacts plays a more and more significant role in the selection of transport projects. However, ex-ante project appraisal is facing an increasing problem concerning the measurement of indirect economic effects. This paper aims to investigate the accurate way of quantifying such benefits via the analysis of theoretical issues, the review of existing approaches and a case study.

Open Access: Yes

DOI: 10.1016/j.trpro.2016.05.012

Evaluation of response times on a touch screen using stereo panned speech command auditory feedback

Hunor Nagy György Wersényi

Publication Name: Lecture Notes in Computer Science Including Subseries Lecture Notes in Artificial Intelligence and Lecture Notes in Bioinformatics

Publication Date: 2016-01-01

Volume: 9811 LNCS

Issue: Unknown

Page Range: 279-286

Description:

User interfaces to access mobile and handheld devices usually incorporate touch screens. Fast user responses are in general not critical, however, some applications require fast and accurate reactions from users. Errors and response times depend on many factors such as the user’s abilities, feedback types and latencies from the device, sizes of the buttons to press, etc. We conducted an experiment with 17 subjects to test response time and accuracy to different kinds of speech-based auditory stimuli over headphones. Speech signals were spatialized based on stereo amplitude panning. Results show significantly better response times for 3 directions than for 5, as well as for native language compared to English, and more accurate judgements based on the meaning of the speech sounds rather than their direction.

Open Access: Yes

DOI: 10.1007/978-3-319-43958-7_33

First names of female servants in a Józsefváros (Josefstadt) apartment building in the 19th-20th centuries

László Horváth

Publication Name: Nevtani Ertesito

Publication Date: 2016-01-01

Volume: Unknown

Issue: 38

Page Range: 79-84

Description:

The paper discusses the 19th-20th-century first names of female servants in an apartment building in Budapest compared to the female first names used by the families that employed them. Sources were register books listing the inhabitants of the building between 1899 and 1947. Female servants arrived to the capital from over 40% of the counties in the country at the time, while families employing them were mostly from Budapest. The most frequent first names in the register books coincide with the top 10 percent of first names in the country-wide statistics of the era. The assumption that mainly young unmarried female servants were listed in the register books by hypocoristic names has clearly not been justified. A comparison of the first names of the female servants and those of the female members of their employers' families displays the approximate similarity of the most frequent first names. Differences between the two name stocks can only be observed with respect to female servants' informal nicknames. The final conclusion of the paper is that first names borne exclusively by female servants did not exist.

Open Access: Yes

DOI: DOI not available

Soil shear modulus from resonant column, torsional shear and bender element tests

Péter Hudacsek Zsolt Szilvágyi Richard P. Ray

Publication Name: International Journal of Geomate

Publication Date: 2016-01-01

Volume: 10

Issue: 2

Page Range: 1822-1827

Description:

This study compares results from three different testing methods: Resonant Column, Torsional Simple Shear, and Bender Element tests to determine shear modulus. The resonant column and torsional shear tests were performed on the same hollow cylinder specimen. The bender element test was performed on a triaxial specimen with the same void ratio and confining stress as well as others. Several effects were studied, among them confining stress, shear strain amplitude and for the bender element, anisotropic confinement. Testing methods and data analysis are discussed in the paper because data interpretation is very important in these tests. Results showed that the shear modulus values were almost identical between the resonant column and torsional shear but varied somewhat with the bender element results. Further research will focus on influence of stress anisotropy preparation methods.

Open Access: Yes

DOI: 10.21660/2016.20.39871

Invariance conditions for nonlinear dynamical systems

Yunfei Song Tamás Terlaky Zoltán Horváth

Publication Name: Springer Optimization and Its Applications

Publication Date: 2016-01-01

Volume: 115

Issue: Unknown

Page Range: 265-280

Description:

Recently,Horváth et al. (Appl Math Comput,submitted) proposed a novel unified approach to study,i.e.,invariance conditions,sufficient and necessary conditions,under which some convex sets are invariant sets for linear dynamical systems. In this paper,by utilizing analogous methodology,we generalize the results for nonlinear dynamical systems. First,the Theorems of Alternatives,i.e.,the nonlinear Farkas lemma and the S-lemma,together with Nagumo’s Theorem are utilized to derive invariance conditions for discrete and continuous systems. Only standard assumptions are needed to establish invariance of broadly used convex sets,including polyhedral and ellipsoidal sets. Second,we establish an optimization framework to computationally verify the derived invariance conditions. Finally,we derive analogous invariance conditions without any conditions.

Open Access: Yes

DOI: 10.1007/978-3-319-42056-1_8

Effects of environmental and management factors on species and trait composition in arable weed communities

Gyula Pinke

Publication Name: Botanikai Kozlemenyek

Publication Date: 2016-01-01

Volume: 103

Issue: 2

Page Range: 249-262

Description:

One of the exciting topics of weed science is to identify the most important ecological and management variables influencing the composition of arable weed communities. This paper reviews the findings of relevant publications from the last 15 years. According to floristic approaches six ecological (altitude, sea-sonality, temperature, precipitation, soil pH, soil texture) and three management variables (crop, preceding crop, degree of intensification) were most often identi-fied as the most important factors determining the species composition of arable weed communities. It can be concluded that there is a general positive correlation between the length of a gradient and its importance. According to functional approaches the most frequent correlations were found between the plant traits of stature, seed size, seed production, germination time, flowering period, life form and some specific variables.

Open Access: Yes

DOI: 10.17716/BotKozlem.2016.103.2.249

Reconstruction Italian style: Restoration of the san domenico church and monastery, forli, Italy by gabrio funari

András Veöreös

Publication Name: Metszet

Publication Date: 2016-01-01

Volume: 2016

Issue: 5

Page Range: 26-29

Description:

The most important part of restoring old buildings could be described as giving a new function to historical heritage sites. Contemporary construction techniques might need to be applied in such a way as to resist compromising the original building's integrity. This leads to a problem of historical faithfulness best explained by the simple fact that a contemporary rendering system will not adhere to older lime washed walls. Here the clash between original use and technologies has been the motivating factor behind restoration, not the creation of a stand alone architectural statement.

Open Access: Yes

DOI: DOI not available