bluuebunny/crossref_metadata_2025 huggingface dataset:
“Memories that are(n’t) mine”: Matrilineal Trauma and Defiant Reinscription in Natasha Trethewey’s Native Guard
Authors: Birdsong Destiny O.
Published: July 2015

This article examines Natasha Trethewey’s Native Guard (2006) as a poetic narrative of intergenerational cultural trauma. A mother’s fears about her daughter’s being born in the hostile environment of the civil rights-era South creates a “maternal impression” on her unborn child. And after birth, the daughter’s identity is shaped by her mother’s various forms of silencing as well as by socially-imposed moments of naming, blackening, and erasure that persist until the narrator tells the buried history of the Native Guards. By doing so, she resituates herself in a revised history of racialized trauma and reappropriates the meanings of her multiple identities.
Rewriting the Genealogy of Minstrelsy for Modernity: “Cry and Sing, Walk and Rage, Scream and Dance”
Authors: Mendelssohn Michèle
Published: July 2015

W. E. B. Du Bois’s Dark Princess (1928) pointedly uses Spirituals and dandyism to interrogate cultural hierarchies. This essay highlights the shared genealogy between early twentieth-century African American writing and two bifurcating branches of nineteenth-century dandyism: the European tradition of Baudelaire and Wilde and the blackface tradition of the minstrel show. Tracing these lines of transmission reveals an unexamined embranchment of literary modernity’s family tree and demonstrates how Du Bois’s novel repurposes this legacy for the twentieth century.
Becoming “More Human”: From the Drafts of Invisible Man to Three Days Before the Shooting…
Authors: Foley Barbara
Published: July 2015

Ralph Ellison’s “Hickman Novel”—upon which Three Days Before the Shooting… is based—reveals that the Popular Front-era radicalism largely effaced from Invisible Man continued to fuel Ellison’s imagination. Although he had established his bona fides as a cold warrior in Invisible Man , Ellison retained certain leftist ideas and insights that both inspired and obstructed his attempts to pull together his second novel. His fidelity to a novelistic timeline anchored in the Jim Crow, the Depression, and the early civil rights movement would be disrupted by the felt need to draw in international antifascist activism during World War II.
An Existential Psychoanalyst in the Literary Therapy Genre: The Representation of a Psychoanalytic Encounter in Irvin Yalom’s The Schopenhauer Cure
Authors: Huang Yen‐Chi
Published: July 2015

The aim of this paper is to describe the fictionalisation of psychoanalysis in the literary therapy genre written by psychotherapists. Being a psychotherapist, Irvin Yalom has written and published several literary therapy novels. The Schopenhauer Cure (2006) presents a psychoanalytic encounter with focus on the patient’s interpersonal issues in a group therapy session and draws a parallel line between fictional patients and the philosopher Arthur Schopenhauer. The fictionalisation of patients’ psychological symptoms and the way therapists examine themselves in the therapeutic milieu in The Schopenhauer Cure correspond to the fundamental concerns of isolation, meaninglessness, death and freedom in existential psychotherapy. I explore the literary representation of the psychotherapist and therapist-patient relationship and the therapeutic encounter in The Schopenhauer Cure in the context of how fictional narratives can be read as a form of highlighting the psychoanalytic encounter
Parametric programming of industrial robots
Authors: Szulczyński Paweł , Kozłowski Krzysztof
Published: July 2015

This article proposes the use of parametric design software, commonly used by architects, in order to obtain complex trajectory and program code for industrial robots. The paper describes the drawbacks of existing solutions and proposes a new script to obtain a correct program. The result of the algorithm was verified experimentally.
The Navier–Stokes–Fourier system: From weak solutions to numerical analysis
Authors: Feireisl Eduard
Published: July 2015

We discuss the impact of certain recent results concerning stability of weak solutions to the complete Navier–Stokes–Fourier system
on the problem of convergence of the associated numerical schemes. In particular, we show that solutions of certain numerical schemes converge
unconditionally to the exact solution as long as the numerical solutions remain bounded.
Analysis of the Accuracy of Uncertainty Noise Measurement
Authors: Przysucha Bartosz , Batko Wojciech , Szeląg Agata
Published: July 2015

The paper formulates some objections to the methods of evaluation of uncertainty in noise measurement which are presented in two standards: ISO 9612 (2009) and DIN 45641 (1990). In particular, it focuses on approximation of an equivalent sound level by a function which depends on the arithmetic average of sound levels. Depending on the nature of a random sample the exact value of the equivalent sound level may be significantly different from an approximate one, which might lead to erroneous estimation of the uncertainty of noise indicators. The article presents an analysis of this problem and the adequacy of the solution depending on the type of a random sample.
Recognition of Acoustic Signals of Loaded Synchronous Motor Using FFT, MSAF-5 and LSVM
Authors: Glowacz Adam
Published: July 2015

This article discusses a system of recognition of acoustic signals of loaded synchronous motor. This software can recognize various types of incipient failures by means of analysis of the acoustic signals. Proposed approach uses the acoustic signals generated by loaded synchronous motor. A plan of study of the acoustic signals of loaded synchronous motor is proposed. Studies include following states: healthy loaded synchronous motor, loaded synchronous motor with shorted stator coil, loaded synchronous motor with shorted stator coil and broken coil, loaded synchronous motor with shorted stator coil and two broken coils. The methods such as FFT, method of selection of amplitudes of frequencies (MSAF-5), Linear Support Vector Machine were used to identify specific state of the motor. The proposed approach can keep high recognition rate and reduce the maintenance cost of synchronous motors.
Real-Time Acoustic Phenomena Modelling for Computer Games Audio Engine
Authors: Miga Bartłomiej , Ziółko Bartosz
Published: July 2015

This article presents an efficient method of modelling acoustic phenomena for real-time applications such as computer games. Simplified models of reflections, transmission, and medium attenuation are described along with assessments conducted by a professional sound designer. The article introduces representation of sound phenomena using digital filters for further digital audio processing.
Frequency of the Audiometric Notch Following Excessive Noise Exposure
Authors: Ristovska Lidija , Jachova Zora , Atanasova Nikica
Published: July 2015

The aim of the study was to determine the configuration of pathologic audiograms in patients with excessive noise exposure, and to calculate the frequency of notches in the audiogram in patients with and without excessive noise exposure by avoiding the effect of age-related hearing loss. We have analyzed 514 audiograms of 257 patients aged between 20 to 50 years: 240 patients (mean age of 38.7 years) with excessive noise exposure and 17 patients (mean age of 41.2 years) with notches in the audiogram, but without a history of excessive noise exposure. For statistical data analysis we have used the Chi-square test and Fisher exact test with the level of significancep< 0.05. Pathologic audiograms were classified into five different types: Slope at 4000 Hz (0.8%), Slope at 2000 Hz (15.1%), Notch at 4000 Hz (67.4%), Notch at 2000 Hz (0.8%), Flat (8.9%), and 7% were out of this classification. A total of 190 (79.2%) patients with excessive noise exposure had a notch in the audiogram. Left ear notches were the most common. Among the patients with notched audiograms, 91.8% had a history of excessive noise exposure, either occupational or nonoccupational, and 8.2% did not report any excessive noise exposure.
On Certain Practical Issues Relating to Construction of the In-duct Single Mode Synthesizer
Authors: Gorazd Łukasz , Snakowska Anna , Jurkiewicz Jerzy , Flach Artur
Published: July 2015

It is convenient to have a device and a method of generating single cut-on modes in cylindrical hard-walled waveguides or at least in laboratory models of such systems. This allows to examine, among other things, properties of various active and/or passive elements inserted in a cylindrical duct by testing them in conditions when the incident (input) wave comprises only one cut-on mode and determining the reflection and transmission coefficients for single selected incident modes. As it has been already demonstrated by the present authors, it is possible to generate single cut-on modes in a circular duct using a small (although increasing with mode order) number of acoustic monopoles arranged properly on a duct cross-section and driven with appropriate acoustic volume amplitudes and phases. Laboratory models of such sources are proposed in this paper and results of tests verifying their directional properties are presented. The other technical issue relating to practical utilization of the proposed method is the possible error introduced by the apparatus used for scanning the acoustic field inside the duct model. It is shown that insertion of the measuring probe changes the total energy radiated into the free space only by a fraction of a decibel.
Research on the Impact of Amplitude of Vibrations on Electrical Parameters of Vibroarc Weld Overlay in Argon
Authors: Nikolov Mitko Ivanov
Published: July 2015

The research is taken on the vibroarc welding apparatus ENTON-60 equipped with an axial non-inertial vibrator in argon shield. The criteria used for assessing the flow of the electric arc process and the formation of weld overlay clad surfaces are: short circuit voltage, voltage at the start of arc combustion, short circuit amperage, and amperage at the end of arc combustion. Wire electrode‘s vibrating frequency is considered as an input variable of the cybernetic model. It has been found that amplitude of vibrations has a significant impact on the vibroarc process - voltage parameters and welding current ratio, as the minimum amperage of short circuit and the lowest voltage at the start of arc combustion is realized at 2 mm amplitude of vibrations.
Study of Injection Process Capability in Production of Plastic Boxes
Authors: Lestyánszka Škůrková Katarína , Kudičová Jozefína
Published: July 2015

Ensuring the process capability currently means the warranty that produced products will be in accordance with requirements, both on the company‘s as well as customer‘s side. This study focuses on the statistical control of injection process capability in serial production in a company focusing on products for healthcare. The injection process is evaluated by control charts, specifically by control chart for average and range ( x̄ , R). As the results showed, based on the chart for average and range, we are able to say that the injection process is under statistical control. The requirement for process capability was met; the indices of process capability Cp and Cpk are higher than the determined value 1.33. The normality of measured values was verified by histogram. The obtained values are: Cp = 1.85 and Cpk = 1.82. Therefore, we may consider the process as capable.
First Steps Towards Process Mining in Distributed Health Information Systems
Authors: Helm Emmanuel , Paster Ferdinand
Published: July 2015

Business Intelligence approaches such as process mining can be applied to the healthcare domain in order to gain insight into the complex processes taking place. Disclosing asis processes helps identify room for improvement and answers questions from medical professionals. Existing approaches are based on proprietary log data as input for mining algorithms. Integrating the Healthcare Enterprise (IHE) defines in its Audit Trail and Node Authentication (ATNA) profile how real-world events must be recorded. Since IHE is used by many healthcare providers throughout the world, an extensive amount of log data is produced. In our research we investigate if audit trails, generated from an IHE test system, carry enough content to successfully apply process mining techniques. Furthermore we assess the quality of the recorded events in accordance with the maturity level scoring system. A simplified simulation of the organizational workflow in a radiological practice is presented. Based on this simulation a process miing task is conducted.
Analyzing Interaction for Automated Adaptation – First Steps in the IAAA Project
Authors: Neumayr Thomas , Kern Daniel , Augstein Mirjam , Kurschl Werner , Altmann Josef
Published: July 2015

Because of an aging society and the relevance of computer-based systems in a variety of fields of our life, personalization of software systems is becoming more important by the day in order to prevent usage errors and create a good user experience. However, personalization typically is a time-consuming and costly process if it is done through manual configuration. Automated adaptation to specific users’ needs is, therefore, a useful way to reduce the efforts necessary. The IAAA project focuses on the analysis of user interaction capabilities and the implementation of automated adaptations based on them. However, the success of these endeavors is strongly reliant on a careful selection of interaction modalities as well as profound knowledge of the target group’s general interaction behavior. Therefore, as a first step in the project, an extensive task-based user observation with thorough involvement of the actual target group was conducted in order to determine input devices and modalities that would in a second step become subject of the first prototypic implementations. This paper discusses the general objectives of the IAAA project, describes the methodology and aims behind the user observation and presents its results.
Change Point Determination in Audio Data Using Auditory Features
Authors: Maka Tomasz
Published: July 2015

The study is aimed to investigate the properties of auditory-based features for audio change point detection process. In the performed analysis, two popular techniques have been used: a metric-based approach and the ΔBIC scheme. The efficiency of the change point detection process depends on the type and size of the feature space. Therefore, we have compared two auditory-based feature sets (MFCC and GTEAD) in both change point detection schemes. We have proposed a new technique based on multiscale analysis to determine the content change in the audio data. The comparison of the two typical change point detection techniques with two different feature spaces has been performed on the set of acoustical scenes with single change point. As the results show, the accuracy of the detected positions depends on the feature type, feature space dimensionality, detection technique and the type of audio data. In case of the ΔBIC approach, the better accuracy has been obtained for MFCC feature space in the most cases. However, the change point detection with this feature results in a lower detection ratio in comparison to the GTEAD feature. Using the same criteria as for ΔBIC, the proposed multiscale metric-based technique has been executed. In such case, the use of the GTEAD feature space has led to better accuracy. We have shown that the proposed multiscale change point detection scheme is competitive to the ΔBIC scheme with the MFCC feature space.
The Impact Of Shopping Centers In Rural Areas And Small Towns In The Outer Metropolitan Zone (The Example Of The Silesian Voivodeship)
Authors: Heffner Krystian , Twardzik Małgorzata
Published: July 2015

Shopping centers in the Silesian Voivodeship have a significant impact on smaller settlement units located in outer areas of agglomerations. It consists mainly in changes related to social, economic, as well as functional and spatial spheres. Studies shows that shopping centers take over more and more functions of higher order (services, public culture, administration) and restrict the economic activity in rural areas outer areas of agglomerations. At the stage of the irrepressible process of suburbanisation of rural areas surrounding large urban agglomerations and structural changes in towns, it is difficult to conclusively assess the consequences of the operation of shopping centers in outer metropolitan areas. The impact of shopping centers on small towns and rural areas is a very dynamic process and requires systematic research.
Fatigue Properties of Polyurethane Foams, with Special Emphasis on Auxetic Foams, Used for Helicopter Pilot Seat Cushion Inserts
Authors: Lisiecki Janusz , Nowakowski Dominik , Reymer Piotr
Published: July 2015

Seat cushion inserts in military helicopters crew seats, as suggested by the helicopters manufacturers, are made of traditional polyurethane foams.

Elastic polyurethane auxetic foams are materials that exhibit different utility properties compared to traditionally used polyurethane foams, such as polyether or polystyrene foams. All the differences result from the primary physical property of elastic polyurethane auxetic foams which is a negative Poisson’s ratio. Auxetic materials are characterized by better utility properties than conventional foam materials – they can potentially increase safety in the event of a crash and offer higher comfort during regular use. Application of auxetic materials as seat cushion inserts would also decrease harmful health effects of vibrations.

This paper presents the results of the fatigue tests carried out on different foam samples by pressing an indenter into the foams' surface that was much larger than the indenter’s surface. A maximum value of the load used during the test was within a defined range in every fatigue cycle.

In order to test 150×150×50 mm foam samples a special indenter was designed and manufactured according to the PN-EN ISO 3385 and PN-EN ISO 2439 standards. The indenter’s dimensions were consistent with the standards in relation to the tested foams' size.

The fatigue tests of both conventional and auxetic foams were carried out according to the above given standards by applying 80,000 load cycles at 70 cycle/min frequency. Tests of viscoelastic foam and multilayer foam specimens, for which the upper layer was made of viscoelastic foam, were carried out according to the ASTM D 3574 standard applying 12,000 load cycles at 10 cycle/min frequency. All the tests were carried out using the MTS 370.10 strength testing machine.

Changes in thickness and density were determined throughout the tests. Moreover, the influence of the volumetric compression ratio on the fatigue properties of auxetic foam samples and the dependence of foam deflection on the number of cycles were examined. Finally, the test results obtained for conventional and auxetic foams were compared and discussed.
Selected Aspects Related to Preparation of a Fatigue Test Plan of a Metallic Airframe
Authors: Brzęczek Józef , Gruszecki Henryk , Pieróg Leszek , Pietruszka Janusz
Published: July 2015

Service life of the PZL M28 is computed based on the results of the full-scale fatigue tests of the structure [1]. As the PZL M28 is a commuter category airplane according to the 14 CFR Part 23 and CS-23 regulations, the test objects were: (1) wing and wing load carry-through structure, (2) empennage and attached fuselage structure. Additionally, there were fatigue tests carried out for the landing gear and other selected elements including control system elements. The aircraft load carry-through structure is metallic and the cabin is unpressurized. The fatigue tests were conducted stage-by-stage. As tests progressed, it was possible to extend the aircraft target service life, applying the safe-life philosophy with reference to the primary components of the load carry-through structure.

The article brings into attention selected issues related to the fatigue tests plan preparation, with focus on wing and wing load carry-through structure test.
Selected Aspects Related to Preparation of Fatigue Tests of a Metallic Airframe
Authors: Brzęczek Józef , Chodur Jerzy , Pietruszka Janusz
Published: July 2015

The basis for the computation of the service life of the PZL M28 was the results of the full-scale fatigue tests of the structure [1]. As the PZL M28 is a commuter category airplane according to the 14 CFR Part 23 and CS-23 regulations, the test objects were: (1) wing and wing load carry-through structure, (2) empennage and attached fuselage structure. Additionally, there were fatigue tests carried out for the landing gear and other selected elements including control system elements. The aircraft load carry-through structure is metallic and the cabin is unpressurized. The fatigue tests were conducted stage-by-stage. As the tests progressed, it was possible to extend the aircraft’s target service life, applying a safe life philosophy with reference to the primary components of the load carry-through structure.

This paper brings into attention selected issues related to the fatigue tests preparation (the stage following the preparation of the test plan), with focus on the wing and wing load carry-through structure.
An Approach to Structural Health Monitoring of Composite Structures Based on Embedded PZT Transducers
Authors: Dziendzikowski Michał , Dragan Krzysztof , Kurnyta Artur , Kornas Łukasz , Latoszek Adam , Zabłocka Magdalena , Kłysz Sylwester , Leski Andrzej , Chalimoniuk Marek , Giewoń Janusz
Published: July 2015

One approach to developing a system of continues automated monitoring of structural health is to use elastic waves excited in a given medium by a piezoelectric transducers network. Depending on their source and the geometry of the structure under consideration elastic waves can propagate over a significant distance. They are also sensitive to local structure discontinuities and deformations providing a tool for detecting local damage in large aerospace structures. This paper investigates the issue of Barely Visible Impact Damages (BVIDs) detection in composite materials. The model description and the results of impact tests verifying damage detection capabilities of the proposed signal characteristics are presented in the paper.
Brackets with (τ,σ)-derivations and (p,q)-deformations of Witt and Virasoro algebras
Authors: Elchinger Olivier , Lundengård Karl , Makhlouf Abdenacer , Silvestrov Sergei D.
Published: July 2015

The aim of this paper is to study some brackets defined on (τ,σ)-derivations satisfying quasi-Lie identities. Moreover, we provide examples of

(
p
,
q
)

${(p,q)}$

-deformations of Witt and Virasoro algebras as well as

𝔰
⁢
𝔩

$\mathfrak{sl}$

(2) algebra. These constructions generalize the results obtained by Hartwig, Larsson and Silvestrov on σ-derivations, arising in connection with discretizations and deformations of algebras of vector fields.
Comparative 230Th/U and 14C Dating of a Buried Stump Layer (Western Siberia)
Authors: Maksimov Fedor , Kuznetsov Vladislav , Laukhin Stanislav , Kuksa Kathrine , Levchenko Snezhana , Grigoriev Vasily
Published: July 2015

Dating of late Pleistocene sediments remains a challenge in Quaternary chronology, due to the inherent limitations of the 14C and OSL methods. The 230Th/U radioisotope method is theoretically applicable to wood remnants contained within Pleistocene sediments, but few results have been pub-lished to date and in some cases, the age data are ambiguous. This paper tests the use of 230Th/U da-ting of fossil wood remnants dated earlier by radiocarbon method. We analyzed a buried larch trunk from a well-known stump layer in the Lipovka outcrop, located on the Tobol River bank in Western Siberia. The stump layer is preserved in situ. We determined the specific activities of U and Th iso-topes in samples of both modern pine and fossil larch and proposed a model for the incorporation and distribution of U and Th in the buried wood during aging. Complications related with the recognition of geochemical closed systems with respect to U did not allow obtaining completely reliable 230Th/U age. Despite this the 230Th/U age obtained for the uppermost heartwood sample and 14C ages of the same larch trunk and other wood and vegetation remnants gave consistent results. These age data in combination with previously obtained pollen data testify the stump layer formation during the late cooling stage of the Karganian time (MIS-3, Middle Valdai).
A new on-fluorescent sensor for Ag+based on benzimidazole bearing bis(ethoxycarbonylmethyl)amino groups
Authors: Zhao Bing , Fang Yue , Ma Ming-jie , Deng Qi-Gang , Xu Yu , Wang Li-yan
Published: July 2015

A new fluorescent sensor based on a benzimidazole unit bearing bis(ethoxycarbonylmethyl)amino groups was designed and synthesized. The ligand exhibits strong sensitivity and selectivity for Ag+by enhanced fluorescent intensity in the presence of a wide range of other tested metal ions in methanol. The colorimetric and fluorescent response to Ag+can be conveniently detected even by the naked eye, which offers a facile method for visual detection of Ag+.
Biomechanical Analysis of Defensive Cutting Actions During Game Situations: Six Cases in Collegiate Soccer Competitions
Authors: Sasaki Shogo , Koga Hideyuki , Krosshaug Tron , Kaneko Satoshi , Fukubayashi Toru
Published: July 2015

The strengths of interpersonal dyads formed by the attacker and defender in one-on-one situations are crucial for performance in team ball sports such as soccer. The purpose of this study was to analyze the kinematics of one-on-one defensive movements in soccer competitions, and determine the relationships between lower limb kinematics and the center of mass translation during cutting actions. Six defensive scenes in which a player was responding to an offender’s dribble attack were selected for analysis. To reconstruct the three-dimensional kinematics of the players, we used a photogrammetric model-based image-matching technique. The hip and knee kinematics were calculated from the matched skeleton model. In addition, the center of mass height was expressed as a ratio of each participant’s body height. The relationships between the center of mass height and the kinematics were determined by the Pearson’s product-moment correlation coefficient. The normalized center of mass height at initial contact was correlated with the vertical center of mass displacement (r = 0.832, p = 0.040) and hip flexion angle at initial contact (r = −0.823, p = 0.044). This suggests that the lower center of mass at initial contact is an important factor to reduce the downwards vertical center of mass translation during defensive cutting actions, and that this is executed primarily through hip flexion. It is therefore recommended that players land with an adequately flexed hip at initial contact during one-on-one cutting actions to minimize the vertical center of mass excursion.
Exploratory Investigation of Impact Loads During the Forward Handspring Vault
Authors: Penitente Gabriella , Sands William A.
Published: July 2015

The purpose of this study was to examine kinematic and kinetic differences in low and high intensity hand support impact loads during a forward handspring vault. A high-speed video camera (500 Hz) and two portable force platforms (500 Hz) were installed on the surface of the vault table. Two-dimensional analyses were conducted on 24 forward handspring vaults performed by 12 senior level, junior Olympic program female gymnasts (16.9 ±1.4 yr; body height 1.60 ±0.1 m; body mass 56.7 ±7.8 kg). Load intensities at impact with the vault table were classified as low (peak force < 0.8 × body weight) and high (peak force > 0.8 × body weight). These vaults were compared via crucial kinetic and kinematic variables using independent t-tests and Pearson correlations. Statistically significant (p < 0.001) differences were observed in peak force (t(24) = 4.75, ES = 3.37) and time to peak force (t(24) = 2.07, ES = 1.56). Statistically significant relationships between the loading rate and time to peak force were observed for high intensity loads. Peak force, time to peak force, and a shoulder angle at impact were identified as primary variables potentially involved in the determination of large repetitive loading rates on the forward handspring vault.
The Effect of the Number of Sets on Power Output for Different Loads
Authors: Morales-Artacho Antonio J. , Padial Paulino , García-Ramos Amador , Feriche Belén
Published: July 2015

There is much debate concerning the optimal load (OL) for power training. The purpose of this study was to investigate the effect of the number of sets performed for a given load on mean power output (Pmean). Fourteen physically active men performed 3 sets of 3 bench-press repetitions with 30, 40 and 50 kg. The highest mean power value (Pmax) across all loads and Pmean were compared when data were taken from the first set at each absolute load vs. from the best of three sets performed. Pmean increased from the first to the third set (from 5.99 ± 0.81 to 6.16 ± 0.96 W·kg−1, p = 0.017), resulting in a main effect of the set number (p < 0.05). At the 30 kg load Pmean increased from the first to the third set (from 6.01 ± 0.75 to 6.35 ± 0.85 W·kg−1; p < 0.01). No significant effect was observed at 40 and 50 kg loads (p > 0.05). Pmax and velocity were significantly affected by the method employed to determine Pmean at each load (p < 0.05). These results show a positive effect of the number of sets per load on Pmean, affecting Pmax, OL and potentially power training prescription.
The Functional Classification and Field Test Performance in Wheelchair Basketball Players
Authors: Gil Susana María , Yanci Javier , Otero Montserrat , Olasagasti Jurgi , Badiola Aduna , Bidaurrazaga-Letona Iraia , Iturricastillo Aitor , Granados Cristina
Published: July 2015

Wheelchair basketball players are classified in four classes based on the International Wheelchair Basketball Federation (IWBF) system of competition. Thus, the aim of the study was to ascertain if the IWBF classification, the type of injury and the wheelchair experience were related to different performance field-based tests. Thirteen basketball players undertook anthropometric measurements and performance tests (hand dynamometry, 5 m and 20 m sprints, 5 m and 20 m sprints with a ball, a T-test, a Pick-up test, a modified 10 m Yo-Yo intermittent recovery test, a maximal pass and a medicine ball throw). The IWBF class was correlated (p<0.05) to the hand dynamometry (r= 0.84), the maximal pass (r=0.67) and the medicine ball throw (r= 0.67). Whereas the years of dependence on the wheelchair were correlated to the velocity (p<0.01): 5 m (r= −0.80) and 20 m (r= −0.77) and agility tests (r= −0.77, p<0.01). Also, the 20 m sprint with a ball (r= 0.68) and the T-test (r= −0.57) correlated (p<0.05) with the experience in playing wheelchair basketball. Therefore, in this team the correlations of the performance variables differed when they were related to the disability class, the years of dependence on the wheelchair and the experience in playing wheelchair basketball. These results should be taken into account by the technical staff and coaches of the teams when assessing performance of wheelchair basketball players.
Outlier detection by the EM algorithm for laser scanning in rectangular and polar coordinate systems
Authors: Koch Karl-Rudolf , Kargoll Boris
Published: July 2015

To visualize the surface of an object, laser scanners determine the rectangular coordinates of points of a grid on the surface of the object in a local coordinate system. Vertical angles, horizontal angles and distances of a polar coordinate system are measured with the scanning. Outliers generally occur as gross errors in the distances. It is therefore investigated here whether rectangular or polar coordinates are better suited for the detection of outliers. The parameters of a surface represented by a polynomial are estimated in the nonlinear Gauss Helmert (GH) model and in a linear model. Rectangular and polar coordinates are used, and it is shown that the results for both coordinate systems are identical. It turns out that the linear model is sufficient to estimate the parameters of the polynomial surface. Outliers are therefore identified in the linear model by the expectation maximization (EM) algorithm for the variance-inflation model and are confirmed by the EM algorithm for the mean-shift model. Again, rectangular and polar coordinates are used. The same outliers are identified in both coordinate systems.
The textual profile of antonyms: A corpus-based study
Authors: Kostić Nataša
Published: July 2015

Unlike the traditional approaches that describe and define antonymy on the basis of semantic properties of antonymous pairs in a language system, antonyms are in this paper considered with reference to their roles in actual language use. Antonymy has traditionally been regarded as a paradigmatic relation, but recent studies of antonym co-occurrence in electronic corpora of English and Serbian have identified two major and four minor functions of antonyms in discourse, with its accompanying lexico-syntactic patterns, matching the results of similar analyses in Japanese, Swedish, and Dutch. This paper aims to investigate the performance of three antonymous patterns in retrieving contrastive terms and the possibility to create the contrastive profile of given seed words in Serbian written discourse by means of those patterns. It also examines whether there is a relation between the markedness distinction between members of the antonymous pair and the position of the chosen seed word (i.e., whether it comes in the X or the Y position in the pattern). Results of the study show that it is possible to create the textual profile of antonyms using these lexico-syntactic constructions, and that the unmarked member has a richer contrastive profile in text.
Semantic and (morpho)syntactic constraints on anticausativization: Evidence from Latin and Old Norse-Icelandic
Authors: Cennamo Michela , Eythórsson Thórhallur , Barðdal Jóhanna
Published: July 2015

The diachrony of valency patterns is generally an understudied phenomenon. The present article investigates anticausativization from a diachronic perspective, highlighting the parameters determining the morphosyntactic encoding of this type of intransitivization in two early Western Indo-European languages, Latin and Old Norse-Icelandic. It is shown that the structural and lexical aspects of a verb’s meaning and their interplay with the inherent and relational characteristics of verbal arguments affect the synchronic distribution and the diachronic development of the anticausativation strategies in the languages investigated. These features interact, in the course of time, with changes in the encoding of voice and grammatical relations, such as the demise of the synthetic mediopassive and the recasting of the case system.
Dielectric properties and molecular motions of liquid crystal molecules in 4-(2-methylbytyl)phenyl 4-(4-octylphenyl)benzoate liquid crystal having blue phase (CE8)
Authors: Otowski W. , Lewińska G.
Published: July 2015

Blue phase liquid crystals exhibit unique properties which are used in the new type of display. A blue-phase liquid crystal display was first presented commercially by Samsung in 2007. The blue-phase-three-color pixel display eliminates the need for color filters. This type of display uses blue-phase multi-component liquid crystal. Considering the one-component systems, it turns out that they are stable only in a very narrow range of temperatures between the isotropic and the chiral nematic phase (about 1 K). In 2005, a wide temperature range BP multi-component system was reported by researchers from the University of Cambridge. There are still several unsolved problems left. One of them is chemical stability and reliability. Therefore, the knowledge of molecular dynamics of blue phase liquid crystal is a prerequisite for understanding of blue-phase multi-component system. Understanding the molecular dynamics of a single component liquid-crystalline blue phase system can facilitate the solution of these problems. We present the molecular dynamics investigation of 4-(2-methylbytyl)phenyl 4-(4-octylphenyl)benzoate (CE8), which may be a good candidate to form materials suitable for blue-phase liquid crystal displays.
Predictive study of structural, electronic, magnetic and thermodynamic properties of XFeO3 (X = Ag, Zr and Ru) multiferroic materials in cubic perovskite structure: first-principles calculations
Authors: Moulay N. , Ameri M. , Azaz Y. , Zenati A. , Al-Douri Y. , Ameri I.
Published: July 2015

The full potential linear-muffin-tin-orbital method within the spin local density approximation has been used to study the structural, electronic, magnetic and thermodynamic properties of three multiferroic compounds of XFeO3 type. Large values of bulk modulus for these compounds have been obtained, which demonstrates their hardness. The calculated total and partial density of states of these compounds shows a complex of strong hybridized 3d and 4d states at Fermi level. The two degenerate levels eg and t2g clearly demonstrate the origin of this complex. We have also investigated the effect of pressure, from 0 GPa to 55 GPa, on the magnetic moment per atom and the exchange of magnetic energy between the ferromagnetic and antiferromagnetic states. For more detailed knowledge, we have calculated the thermodynamic properties, and determined heat capacity, Debye temperature, bulk modulus and enthropy at different temperatures and pressures for the three multiferroic compounds. This is the first predictive calculation of all these properties.
Electrochemical synthesis of nanoplatelets-like CuS0.2Se0.8 thin film for photoluminescence applications
Authors: Sharma A. K. , Yewale M. A. , Chavan G. A. , Kambale D. B. , Potdar S.
Published: July 2015

Copper sulfide-selenide (CuS0.2Se0.8) thin films were deposited on FTO coated glass substrate (fluorine doped tin oxide) and stainless steel substrates using electrodeposition technique. Deposited thin films were characterized using different characterization techniques viz. X-ray diffraction (XRD), scanning electron microscopy (SEM), UV-Vis spectroscopy, photoluminescence spectroscopy and surface wettability. XRD study showed polycrystalline nature with cubic phase of the films. Scanning electron microscopy showed that the surface area of the substrate was covered by the nanoplatelets structure of a thickness of 140 to 150 nm and optical study showed that the direct band gap was ~1.90 eV. Surface wettability showed hydrophobic nature of the CuS0.2Se0.8 thin films.
Haar Wavelet Based Implementation Method of the Non–integer Order Differentiation and its Application to Signal Enhancement
Authors: Li Yuanlu , Pan Chang , Meng Xiao , Ding Yaqing , Chen Haixiu
Published: July 2015

Non–integer order differentiation is changing application of traditional differentiation because it can achieve a continuous interpolation of the integer order differentiation. However, implementation of the non–integer order differentiation is much more complex than that of integer order differentiation. For this purpose, a Haar wavelet-based implementation method of non–integer order differentiation is proposed. The basic idea of the proposed method is to use the operational matrix to compute the non–integer order differentiation of a signal through expanding the signal by the Haar wavelets and constructing Haar wavelet operational matrix of the non–integer order differentiation. The effectiveness of the proposed method was verified by comparison of theoretical results and those obtained by another non–integer order differential filtering method. Finally, non–integer order differentiation was applied to enhance signal.
Noise Suppression Phenomenon in Fiber Raman Amplifier
Authors: Felinskyi Georgii , Dyriv Mykhailo
Published: July 2015

The problem of small bit error rate is actual in fiber Raman amplifiers. Our experimental data on the amplified spontaneous emission (ASE) with backward pumping as a base of optical noise evaluation are presented in this paper. Raman gain spectrum for useful Stokes low-powered signal is calculated and compared with obtained spectrum of non-coherent ASE noise. It is shown that output optical signal has better gain than the amplified spontaneous emission that leads to appreciable growth of output optical signal-to-noise ratio.
Independence Between Two Channels of Surface Electromyogram Signal to Measure the Loss of Motor Units
Authors: Arjunan Sridhar P. , Kumar Dinesh , Naik Ganesh
Published: July 2015

This study has investigated the relationship in the connectivity of motor units in surface electromyogram (sEMG) of biceps brachii muscle. It is hypothesized that with ageing, there is reduction/loss in number of motor units, leading to reduction in the independence between the channels of the recorded muscle activity. Two channels of sEMG were recorded during three levels of isometric muscle contraction: 50 %, 75 % and 100 % maximal voluntary contraction (MVC). 73 subjects (age range 20-70) participated in the experiments. The independence in channel index (ICI) between the two sEMG recording locations was computed using the independent components and Frobenius norm. ANOVA Statistical analysis was performed to test the effect of age (loss of motor units) and level of contraction on ICI. The results show that the ICI among the older cohort was significantly lower compared with the younger adults. This research study has shown that the reduction in number of motor units is reflected by the reduction in the ICI of the sEMG signal.
Game localisation as software-mediated cultural experience: Shedding light on the changing role of translation in intercultural communication in the digital age
Authors: O’Hagan Minako
Published: July 2015

In this rapidly technologising age translation practice has been undergoing formidable changes with the implication that there is a need to expand the disciplinary scope of translation studies. Taking the case of game localisation this article problematises the role of translation as intercultural communication by focusing on cultural elements of video games. Game localisation evolved in response to the game industry’s need to distribute game software in territories other than the country of origin whereby adjusting games technically, linguistically and culturally to suit the requirements of the target market. Despite the importance of this cross-lingual and cross-cultural operation for the industry’s success in the global market, game localisation remains an underreported area of research in translation studies. A critical analysis of game localisation as generating software-mediated cultural experiences reveals intercultural communication issues due to the nature of modern digital games as technological and cultural artefacts. By combining translation studies perspectives and the theoretical framework of critical theory of technology, the author argues that game localisation is eliciting something new about the role of translation in forging intercultural communication in the digital age.
Teaching the Romanian neighbors Hungarian: language ideologies and the Debrecen Summer School
Authors: Kiss Attila Gyula
Published: July 2015

This article is a contribution to the hitherto scant literature on learning a historical minority language and on language ideologies in the context of a study abroad program in Hungary, Debrecen. I analyse the language ideologies of the decision makers in Hungary and in the Debrecen Summer School in relation to the teaching of Hungarian to the neighboring peoples. Drawing on interactional data of participants from Romania, the perspective of learning Hungarian as a historical minority language is examined. The present article combines a historical approach with language ideologies by focusing on an institution offering language education. Language ideologies are presented as they appear in the larger historical discourses, contemporary documents, and media interviews. I briefly outline the major turning points in the history of the institution which also reflects the changing language ideologies and cultural politics of Hungary. The qualitative discourse analysis of interviews and the conclusion of this ethnographic study demonstrate that language ideological positions in relation to the teaching and learning of Hungarian have been firmly located in historical and cultural contexts. Discourse analysis of various data demonstrates that, on the one hand, the course providers have espoused competing ideologies of who the learners should be as well as how to present the country and the culture, while, on the other hand, showing that the learners have had to negotiate prejudice and stereotype rooted in discourses about the often burdened history.
Indium-Tin-Oxide for High-performance Electro-optic Modulation
Authors: Ma Zhizhen , Li Zhuoran , Liu Ke , Ye Chenran , Sorger Volker J.
Published: July 2015

Advances in opto-electronics are often led by discovery and development of
materials featuring unique properties. Recently, the material class of
transparent conductive oxides (TCO) has attracted attention for active photonic
devices on-chip. In particular, indium tin oxide (ITO) is found to have
refractive index changes on the order of unity. This property makes it possible
to achieve electrooptic modulation of sub-wavelength device scales, when thin
ITO films are interfaced with optical light confinement techniques such as found
in plasmonics; optical modes are compressed to nanometer scale to create strong
light-matter interactions. Here we review efforts towards utilizing this novel
material for high performance and ultra-compact modulation. While high
performance metrics are achieved experimentally, there are open questions
pertaining to the permittivity modulation mechanism of ITO. Finally, we review a
variety of optical and electrical properties of ITO for different processing
conditions, and show that ITO-based plasmonic electro-optic modulators have the
potential to significantly outperform diffractionlimited devices.
Nanophotonics silicon solar cells: status and future challenges
Authors: Jia Baohua
Published: July 2015

Light management plays an important role in high-performance solar cells. Nanostructures that could effectively trap light offer great potential in improving the conversion efficiency of solar cells with much reduced material usage. Developing low-cost and large-scale nanostructures integratable with solar cells, thus, promises new solutions for high efficiency and low-cost solar energy harvesting. In this paper, we review the exciting progress in this field, in particular, in the market, dominating silicon solar cells and pointing out challenges and future trends.
The Experience of Dual Career through Slovak Athletes’ Eyes
Authors: Geraniosova Kristina , Ronkainen Noora
Published: July 2015

The purpose of this study was to examine how Slovak athletes experience dual career (the combination of an athletic career with education and/or work). The study strived to gain an understanding of the athletes’ attitudes towards education as well as perceived difficulties and supporting elements in pursuing dual career. Five athletes were interviewed once for approx. 105 min. The interviews and data analysis were based on Intepretative Phenomenological Analysis (IPA) and the interviews were focused on their experience in combining an athletic career with education or work. The athletes experienced dual career as manageable as long as they were assisted by at least simple supportive structures and provided flexible arrangements. Peers had played an important role in athletes’ decision-making concerning dual career and in providing social support when facing challenges within dual career. The teachers’ prejudice against the athletes based on their athletic role and the lack of dual career structures appeared to be significant deficiencies in dual career support. Finally, the analysis revealed the negative perception of athletes and sport science students by educational representatives. This perception may be a hurdle to be overcome in future dual career development.