bluuebunny/crossref_metadata_2025_split huggingface dataset:
Acoustic Study of REpower MM92 Wind Turbines During Exploitation
Authors: Kłaczyński Maciej , Wszołek Tadeusz 
Published: April 2015

Abstract
The paper presents the current state of knowledge concerning the sources of noise generated by wind turbines, force measurement methodology, and assessment of noise onerousness in this type of installation, on the basis of a study concerning a wind farm with five REpower MM92 wind turbines and the electric power of 2 MW and the sound power level of 104.2 dB(A) each. Particular attention was focused on the often discussed problem of presence of infrasound generated by turbines and on the requirements of the applicable reference methodologies for the measurement of wind speed to 5 m/s, while the turbine reaches its full power at speeds above 10 m/s.
A Versatile Model of Nonlinear Electrodynamic Loudspeaker Co-Operating with the Amplifier Designed by Way of Advanced Software
Authors: Erza Mehran , Gaviot Etienne , Lemarquand Guy , Tournier Pascal , Camberlein Lionel , Durand Stephane , Polet Frederic 
Published: April 2015

Abstract
Sound processing with loudspeaker driving depends critically on high quality electroacoustic transducers together with their relevant amplifiers. In this paper, the nonlinear effects of electrodynamic loudspeakers are investigated as regard the influence of the changes of their main descriptive parameters values. Indeed, while being operated nonlinear effects observed with loudspeakers are due to changes of such constitutive parameters. Regarding either current or voltage-drive, an original model based on Simulink R is presented, taking account of all the electrical and mechanical properties closely associated with nonlinear behaviours. Moreover, as such a Simulink R model may be combined with the PSpice R advanced software, the behaviour of both loudspeaker and amplifier can be exhaustively investigated and optimized. To this end, the amplifier is simulated thanks to the Orcad-Capture-PSpiceR software prior to match with the loudspeaker model with the so-called SLPS co-simulator. Then, values of the current flowing through the loudspeaker can be determined and plotted considering voltage controlling. Obviously in this case current-drive has not to be assessed. This way to proceed allows us to highlight any critical information especially due to the voice coil displacement, yielded velocity, and acceleration of the diaphragm. Indeed our approach testifies to the imperative necessity of mechanical measurements together with electrical ones. Then, considering a given amplifier-loudspeaker association with specific parameters changes of the latter, the entailed nonlinear distortion allows us to qualify and criticize the whole design. Such an original approach should be most valuable so as to match the best fitted amplifier with a given electrodynamic loudspeaker. Then non linear effects due to voltage and current-drive are compared highlighting the advantages of an apt currentcontroled policy.
Effect of Bass Bar Tension on Modal Parameters of a Violin's Top Plate
Authors: Skrodzka Ewa B. , Linde Bogumił B.J. , Krupa Antoni 
Published: April 2015

Abstract
Experimental modal analysis of a violin with three different tensions of a bass bar has been performed. The bass bar tension is the only intentionally introduced modification of the instrument. The aim of the study was to find differences and similarities between top plate modal parameters determined by a bass bar perfectly fitting the shape of the top plate, the bass bar with a tension usually applied by luthiers (normal), and the tension higher than the normal value. In the modal analysis four signature modes are taken into account. Bass bar tension does not change the sequence of mode shapes. Changes in modal damping are insignificant. An increase in bass bar tension causes an increase in modal frequencies A0 and B(1+) and does not change the frequencies of modes CBR and B(1-).
Chronicle: 42nd Winter School on Vibroacoustical Hazards Suppressions Szczyrk, Poland, March 3 – 7, 2014
Authors: Bukowski Roman 
Published: April 2015

Abstract
Traditionally, the 42nd Winter School on Vibroacoustical Hazards Suppressions national conference is organized by Upper Silesian Division of the Polish Acoustical Society. The conference again is organized in Szczyrk. As at previous year, the conference has two co-organizers, i.e. Institute of Physics – Science-Didactic Center at the Silesian University of Technology and the Committee of Acoustics of the Polish Academy of Sciences. The conference is a forum for all environmental vibroacoustic fields. Particularly it concerns traffic noise, industry noise, vibroacoustics of machines, room acoustics, building acoustics, noise protection and similar problems. Works which are presented during the School are theoretical, experimental, measuring, technical, applied and normative. The School lectures and other conference materials will be published in the “Materials of the XLII Winter School on Vibroacoustical Hazards Suppressions” (in Polish) edited by dr. Roman Bukowski. This publication will be intended for participants of the School and for many libraries in Poland. Other information about the 42nd WS on VHS you can find on our website http://ogpta.pols.pl/szzzw
Underwater Acoustic Imaging of the Sea
Authors: Grelowska Grażyna , Kozaczka Eugeniusz 
Published: April 2015

Abstract
Acoustic waves are a carrier of information mainly in environments where the use of other types of waves, for example electromagnetic waves, is limited. The term acoustical imaging is widely used in the ultrasonic engineering to imaging areas in which the acoustic waves propagate. In particular, ultrasound is widely used in the visualization of human organs-ultrasonography (Nowicki, 2010).
Expanding the concept, acoustical imaging can also be used to presentation (monitoring) the current state of sound intensity distribution leading to characterization of sources in observed underwater region.
This can be represented in the form of an acoustic characteristic of the area, for example as a spectrogram. Knowledge of the underwater world which is built by analogy to the perception of the space on the Earth's surface is to be systematize in the form of images. Those images arise as a result of graphical representation of processed acoustic signals.
In this paper, it is explained why acoustic waves are used in underwater imaging. Furthermore, the passive and active systems for underwater observation are presented. The paper is illustrated by acoustic images, most of them originated from our own investigation.
Follow That Tune-Adaptive Approach to DTW-based Query-by-Humming System
Authors: Stasiak Bartłomiej 
Published: April 2015

Abstract
Dynamic Time Warping is a standard algorithm used for matching time series irrespective of local tempo variations. Its application in the context of Query-by-Humming interface to multimedia databases requires providing the transposition independence, which involves some additional, sometimes computationally expensive processing and may not guarantee the success, e.g., in the presence of a pitch trend or accidental key changes.
The method of tune following, proposed in this paper, enables solving the pitch alignment problem in an adaptive way inspired by the human ability of ignoring typical errors occurring in sung melodies. The experimental validation performed on the database containing 4431 queries and over 5000 templates confirmed the enhancement introduced by the proposed algorithm in terms of the global recognition rate.
Ultrasonic Mammography with Circular Transducer Array
Authors: Opieliński Krzysztof J. , Pruchnicki Piotr , Gudra Tadeusz 
Published: April 2015

Abstract
Ultrasonic projection imaging is similar to X-ray radiography. Nowadays, ultrasonic projection methods have been developed in the set-up of multi-element flat arrays with miniature transducers, where one of the array acts as a transmitter and the other one is a receiver.
In the paper, a new method of the projection imaging using a 1024-element circular ultrasonic transducer array is presented. It allows the choice of a projection scanning plane for any angle around a studied object submerged in water. Fast acquisition of measurement data is achieved as a result of parallel switching of opposite transmitting and receiving transducers in the circular array and vertical movement of the array. The algorithm equalizing the length of measurement rays and the distances between them was elaborated for the reconstruction of projection images.
Projection research results of breast phantom obtained by means of the elaborated measurement set-up and compared with mammography simulations (acquired through overlapping of X-ray tomographic images) show that ultrasonic projection method presented in this paper (so-called ultrasonic mammogra-phy) can be applied to the woman's breast and be used as a diagnosis for an early detection of cancerous lesions. It can, most of all, be used as an alternative or complementary method to standard mammography, which is harmful because of ionizing radiation and invasive due to the mechanical compression of tissue.
Circular Radon Transform Inversion Technique in Synthetic Aperture Ultrasound Imaging: an Ultrasound Phantom Evaluation
Authors: Tasinkevych Jurij , Trots Ihor 
Published: April 2015

Abstract
The paper presents an overview of theoretical aspects of ultrasound image reconstruction techniques based on the circular Radon transform inversion. Their potential application in ultrasonography in a similar way as it was successfully done in the x-ray computer tomography is demonstrated. The methods employing Radon transform were previously extensively explored in the synthetic aperture radars, geophysics, and medical imaging using x-ray computer tomography. In this paper the main attention is paid to the ultrasound imaging employing monostatic transmit-receive configuration. Specifically, a single transmit and receive omnidirectional source placed at the same spatial location is used for generation of a wide-band ultrasound pulse and detection of back-scattered waves. The paper presents derivation of the closed-form solution of the CRT inversion algorithms by two different approaches: the range-migration algorithm (RMA) and the deconvolution algorithm (DA). Experimentally determined data of ultrasound phantom obtained using a 32-element 5 MHz linear transducer array with 0.48 mm element pitch and 0.36 mm element width and 5 mm height, excited by a 2 sine cycles burst pulse are used for comparison of images reconstructed by the RMA, DA, and conventional synthetic aperture focusing technique (SAFT). It is demonstrated that both the RMA and SAFT allow better lateral resolution and visualization depth to be achieved as compared to the DA approach. Comparison of the results obtained by the RMA method and the SAFT indicates slight improvement of the lateral resolution for the SAFT of approximately 1.5 and 1.6% at the depth of 12 and 32 mm, respectively. Concurrently, however, the visualization depth increase for the RMA is shown in comparison with the SAFT. Specifically, the scattered echo amplitude increase by the factor of 1.36 and 1.12 at the depth of 22 and 32 mm is demonstrated. It is also shown that the RMA runs about 30% faster than the SAFT and about 12% faster than the DA method
The Acoustics of the Catacombs
Authors: Iannace Gino , Trematerra Amelia , Qandil Ahmad 
Published: April 2015

Abstract
The catacombs are underground places. This paper reports the results of acoustic measurements carried out inside the catacombs of “San Gennaro” (Naples) and in those one of “San Callisto” (Rome). Originally the catacombs were also used to perform sacred functions, although we don't know the type of these functions i.e. if they were spoken, sung or performed as psalms. This paper presents acoustic measurements carried out in catacombs using the impulse response method, and by the analysis of the monaural acoustic parameters, (T30, EDT, C80, D50 and STI), the authors intend to understand the type of religious ceremony performed in the catacombs. If the catacombs had been reverberant places, they could not have been used for prayers because the echoes would have created difficulties in concentration and meditation for the devotees due to the poor speech comprehension.
Patterns of Psychiatric Illness over 3 years: A single Centre Inpatient Study From Nepal
Authors: Dhungana S , Chapagai M , Tulachan P , Ojha S P 
Published: April 2015

Introduction: Inpatient psychiatric patients are a major group of our treatment domain and they are different from outpatients in certain characteristics. In this study, we assessed the patterns of psychiatric illnesses along with socio-demographic variables in patients admitted in a psychiatry ward of a tertiary hospital over three consecutive years.Methods: This is a retrospective review of all patients admitted in psychiatry ward Tribhuvan University Teaching Hospital over a three year period between 2067 Baisakh to 2069 Chaitra (2010 April to 2013 April) by reviewing in-patient admission charts from medical records section of the hospital. Descriptive analysis was done by using SPSS version 19; Chicago, IL, with p value of <0.05 being considered statistically significant. Results: There were a total of 881 patients admitted in the psychiatry ward during the study period (281 patients in 2067, 303 in 2068 and 297 in 2069). Patients in the age group of 20-30 years comprised the majority (n=295; 33.5%) of the total population followed by age group 10-20 years (n=239; 27.1%). Males constituted 50.3% of the total patients. Most of the patients belonged to the central developmental region (n=580; 65.8%). Brahmins comprised the majority (n=374; 42.5%) and 98.8% of the patients were Hindus. The most common diagnosis was schizophrenia and related disorders (25.5%) followed by acute and transient psychotic disorders, ATPD (14.4%). Majority of the patients (n=422; 47.9%) had hospital stay duration of 7-14 days. About 98% of patients were discharged with no cases of mortality over three years studied. Overall trend in those three years was similar except for ethnicity, diagnosis, and duration of stay (p≤0.001).Conclusion: We conclude that schizophrenia and related disorders were the most common diagnosis and 20- 30 years age group was the most commonly afflicted age- group among psychiatry inpatients. This adds insight to our understanding of predominant psychiatric illness in inpatients and how they differ from outpatients aiding in scaling of services in inpatients.J Psychiatric Association of Nepal Vol .3, No.2, 2014, pp:15-19DOI: http://dx.doi.org/10.3126/jpan.v3i2.12382
Nouvelles normativités de la famille : la garde partagée au Québec, en France et en Belgique
Authors: Côté Denyse , Gaborean Florina 
Published: April 2015

Cet article porte sur les réformes récentes effectuées en France, en Belgique et au Québec en matière de résidence alternée, d'hébergement égalitaire et de garde physique partagée. Quelles en sont les configurations ? Comment expliquer qu'elles tendent vers le même modèle de reconstruction de l'institution familiale ? Quels sont les impacts des réformes mises en place et quelles normativités sous-tendent-elles ? Une étude de cas multi-site a été réalisée en faisant appel à des sources primaires et secondaires diverses : analyse des nouvelles dispositions législatives et administratives, analyse des études sur la question parues dans les trois juridictions civilistes, entrevues qualitatives auprès de parents, de médiateurs et de juristes québécois. Dans les trois juridictions étudiées, l'idéal de l'égalité et de l'individuation au sein de la cellule familiale hétérosexuelle a été matérialisé en termes de garde physique partagée et celle-ci, à son tour, a été transposée en termes de droit, précédant ainsi les changements sociaux et familiaux. Il s'agit ici de la première étude comparative de cet ordre ayant pour objet les transformations sociales liées à la garde partagée.
Surface-induced oxidation kinetics and mechanism of oxidation of 2-D carbon fabric in different oxidative environments
Authors: Prakash Jyoti , Dasgupta Kinshuk , Kumar Brij , Chakravartty J. K. 
Published: April 2015

Abstract
The oxidation kinetics of a 2-D carbon fabric were studied in both an air and a pure oxygen environment. A simple approach using non-isothermal thermogravimetry and differential thermogravimetry was used. The results showed that the non-isothermal oxidation process of the carbon fabric exhibited self-catalytic characteristics in both environments. The oxidation mechanism and kinetic parameters were analyzed with differential and integral models. Evidence indicated that the oxidation process was a surface-induced phenomenon. The oxidation mechanism in oxygen environment was controlled by random nucleation, whereas in the case of air environment it was phase boundary reaction controlled. Different oxidation mechanisms and their correlations with kinetic parameters have been discussed in detail.
Former dynamic behaviour of a cold-based valley glacier on Svalbard revealed by basal ice and structural glaciology investigations
Authors: Lovell Harold , Fleming Edward J. , Benn Douglas I. , Hubbard Bryn , Lukas Sven , Naegeli Kathrin 
Published: April 2015

AbstractLarge numbers of small valley glaciers on Svalbard were thicker and more extensive during the Little Ice Age (LIA), demonstrated by prominent ice-cored moraines up to several kilometres beyond present-day margins. The majority of these glaciers have since experienced a long period of strongly negative mass balance during the 20th century and are now largely frozen to their beds, indicating they are likely to have undergone a thermal transition from a polythermal to a cold-based regime. We present evidence for such a switch by reconstructing the former flow dynamics and thermal regime of Tellbreen, a small cold-based valley glacier in central Spitsbergen, based on its basal sequence and glaciological structures. Within the basal sequence, the underlying matrix-supported diamict is interpreted as saturated subglacial traction till which has frozen at the bed, indicating that the thermal switch has resulted in a cessation of subglacial sediment deformation due to freezing of the former deforming layer. This is overlain by debris-poor dispersed facies ice, interpreted to have formed through strain-induced metamorphism of englacial ice. The sequential development of structures includes arcuate fracture traces, interpreted as shear planes formed in a compressive/transpressive stress regime; and fracture traces, interpreted as healed extensional crevasses. The formation of these sediment/ice facies and structures is indicative of dynamic, warm-based flow, most likely during the LIA when the glacier was significantly thicker.
Naturally Occurring Deletions/Insertions in HBV Core Promoter Tend to Decrease in Hepatitis B e Antigen-Positive Chronic Hepatitis B Patients during Antiviral Therapy
Authors: Peng Yaqin , Liu Baoming , Hou Jinlin , Sun Jian , Hao Ran , Xiang Kuanhui , Yan Ling , Zhang Jiangbo , Zhuang Hui , Li Tong 
Published: April 2015

Background Mutations in HBV core promoter (CP) are suggested to affect viral replication and disease progression. We investigated CP deletion/insertion mutations (Del/Ins) in hepatitis B e antigen (HBeAg)-positive chronic hepatitis B (CHB) patients before and during antiviral treatment. Methods Direct and clone sequencings were used for detection of CP Del/Ins in 12 patients. The dynamic changes of CP Del/Ins were tracked in these cases until week 48 of treatment. The effects of Del/Ins on CP activities and hepatitis B X protein (HBx) were analysed using luciferase assay and sequence comparison, respectively. Furthermore, 292 untreated HBeAg-positive CHB cases were also analysed. Results Twelve cases with multi-peak PCR direct sequencing electropherograms at baseline were con-firmed to have CP Del/Ins by clone sequencing, with detection rates varying from 14.8% to 93.3% of clones analysed. Follow-up studies showed the detection rates of CP Del/Ins in patients decreased from 100% (12/12) at baseline to 16.7% (2/12) at week 48 of treatment ( P<0.001), in parallel with a decline in HBV DNA, hepatitis B surface antigen (HBsAg), alanine aminotransferase (ALT) and aspartate transaminase (AST) levels along with an increase in HBeAg loss. Luciferase assay results showed distinct promoter activities among Del/Ins-harbouring CP sequences. Importantly, 71.8% (148/206) of Del/Ins sequences potentially resulted in HBx carboxy-terminal truncations. CP Del/Ins mutations were also found in 27.4% (80/292) of untreated cases. Conclusions Naturally occurring complex of CP Del/Ins mutants existed in untreated HBeAg-positive CHB patients. These mutations would affect HBV transcription activities and integrity of HBx, which might correlate with disease progression. Their prevalence decreases on antiviral therapy in parallel with the decline in HBV DNA, HBsAg and ALT and AST levels.
Alcohol Intake and Risk of Incident Psoriatic Arthritis in Women
Authors: Wu Shaowei , Cho Eunyoung , Li Wen-Qing , Han Jiali , Qureshi Abrar A. 
Published: April 2015

Objective.Alcohol intake has been associated with an increased risk of psoriasis. However, the association between alcohol intake and risk of psoriatic arthritis (PsA) has been unclear. We evaluated the association between alcohol intake and risk of incident PsA in a large cohort of US women.Methods.Our present study included a total of 82,672 US women who provided repeated data on alcohol intake over the followup period (1991–2005). Self-reported PsA was validated using the Psoriatic Arthritis Screening and Evaluation (PASE) questionnaire. Cox proportional hazards models were used to estimate the age-adjusted and multivariate-adjusted HR and 95% CI for the PsA in association with alcohol intake.Results.We documented 141 incident PsA cases during 14 years (1,137,763 person-yrs) of followup. Compared to non-drinkers, the multivariate HR for PsA were 0.70 (95% CI 0.48–1.01) for 0.1–14.9 g/day, 1.43 (95% CI 0.67–3.08) for 15.0–29.9 g/day, and 4.45 (95% CI 2.07–9.59) for ≥ 30.0 g/day of cumulative average alcohol intake. Risk estimates were generally consistent when using updated alcohol intake and baseline alcohol intake in 1991 as the exposures, and when the analysis was restricted to those who developed psoriasis during the followup.Conclusion.Excessive alcohol intake was associated with an increased risk of incident PsA in a cohort of US women.