bluuebunny/crossref_metadata_2025_split huggingface dataset:
Sound Intensity Distribution Around Organ Pipe
Authors: Odya Piotr , Kotus Józef , Szczodrak Maciej , Kostek Bożena 
Published: March 2017

Abstract
The aim of the paper was to compare acoustic field around the open and stopped organ pipes. The wooden organ pipe was located in the anechoic chamber and activated with a constant air flow, produced by an external air-compressor. Thus, a long-term steady state response was possible to obtain. Multi-channel acoustic vector sensor was used to measure the sound intensity distribution of radiated acoustic energy. Measurements have been carried out on a defined fixed grid of points. A specialized Cartesian robot allowed for a precise positioning of the acoustic probe. The resulted data were processed in order to obtain and visualize the sound intensity distribution around the pipe, taking into account the type of the organ pipe, frequency of the generated sound, the sound pressure level and the direction of acoustic energy propagation. For the open pipe, an additional sound source was identified at the top of the pipe. In this case, the streamlines in front of the pipe are propagated horizontally and in a greater distance than in a case of the stopped pipe, moreover they are directed downwards. For the stopped pipe, the streamlines of the acoustic flow were directed upwards. The results for both pipe types were compared and discussed in the paper.
Hearing Status in Young People Using Portable Audio Players
Authors: Pawlaczyk-Łuszczyńska Małgorzata , Zaborowski Kamil , Zamojska-Daniszewska Małgorzata , Rutkowska-Kaczmarek Paulina , Dudarewicz Adam , Śliwinska-Kowalska Mariola 
Published: March 2017

Abstract
The aim of this study was to evaluate the hearing status in young adults using portable audio players (PAPs) in relation to their listening habits.
The study included 58 subjects, aged 22.8±2.8 years, non-occupationally exposed to noise. Questionnaire inquiry aimed at collecting personal data, the information on PAPs usage habits, self-assessment of hearing status and identification of risk factors for noise-induced hearing loss (NIHL) were performed in study subjects. Hearing tests included pure-tone audiometry (PTA) and transient-evoked otoacoustic emission (TEOAE).
All subjects were PAPs users. Depending on listening habits they were divided into the subgroups of “frequent” users (>1 h/day) and “non-frequent” users (≤1 h/day). There were no significant differences between subgroups in prevalence of NIHL risk factors and self-assessment of hearing status. However, frequent users more often complained of tinnitus and hyperacusis.
Majority (81.9%) of participants had normal hearing. Nevertheless, 6.9% of audiograms showed high- frequency notches typical for NIHL. Both, the PTA and TEOAE indicated worse hearing in non-frequent users compared to frequent users. No significant differences in prevalence of high-frequency notches be- tween subgroups were noted.
The outcomes do not support some previous studies results that the excessive exposure to music listened through PAPs might result in accelerating of development of NIHL loss in young adults.
Speaker Model Clustering to Construct Background Models for Speaker Verification
Authors: Dişken Gökay , Tüfekci Zekeriya , Çevik Ulus 
Published: March 2017

Abstract
Conventional speaker recognition systems use the Universal Background Model (UBM) as an imposter for all speakers. In this paper, speaker models are clustered to obtain better imposter model representations for speaker verification purpose. First, a UBM is trained, and speaker models are adapted from the UBM. Then, the k-means algorithm with the Euclidean distance measure is applied to the speaker models. The speakers are divided into two, three, four, and five clusters. The resulting cluster centers are used as background models of their respective speakers. Experiments showed that the proposed method consistently produced lower Equal Error Rates (EER) than the conventional UBM approach for 3, 10, and 30 seconds long test utterances, and also for channel mismatch conditions. The proposed method is also compared with the i-vector approach. The three-cluster model achieved the best performance with a 12.4% relative EER reduction in average, compared to the i-vector method. Statistical significance of the results are also given.
Hydrothermal green synthesis of gold nanoparticles using mushroom (Agaricus bisporus) extract: physico-chemical characteristics and antifungal activity studies
Authors: Eskandari-Nojedehi Maryam , Jafarizadeh-Malmiri Hoda , Rahbar-Shahrouzi Javad 
Published: March 2017

AbstractEdible mushroom (Agaricus bisporus) extract was used to synthesize gold nanoparticles (AuNPs) through hydrothermal process (at a pressure of 15 psi and a temperature of 121°C for 15 min). Response surface methodology was applied to monitor the influence of the synthesis parameters, namely: the mushroom extract concentration (1–9 gr DP/100 ml distilled water) and the amount of HAuCL4·3H2O solution (8–12 ml) on the particle size and concentration of fabricated AuNPs. The obtained results demonstrated that while the main and quadratic terms of the synthesis parameters had significant (p<0.05) effects on the response variables, their interactions had insignificant effect on them. The results indicated that spherical synthesized AuNPs using 10 ml of HAuCl4·3H2O solution (1 mm) and 1 ml of mushroom extract with concentration of 5 gr DP/100 ml had mean particle size (25 nm) and maximum concentration (534 ppm) and stability (zeta potential of –45.8 mV). The results revealed that mushroom extract could act as both reducing and stabilizing agents due to its bioactive compounds. Fourier-transform infrared analysis showed that polyols and carbonyl groups in mushroom extract had strong effects on formation of stable AuNPs. The fabricated AuNPs exhibited high antifungal activity againstAspergillus flavusas compared to theAspergillus terreus.
Aus „Information und Dokumentation“ wird „Informations- und Datenmanagement“ – zur Neuausrichtung des dokumentarischen Studiengangs an der FH Potsdam
Authors: Däßler Rolf , Schreyer Angela 
Published: March 2017

Zusammenfassung
Die digitale Gesellschaft und der stetige technologische Wandel erfordern eine kontinuierliche Anpassung der Curricula informationswissenschaftlicher Studiengänge. Die Fachhochschule Potsdam bietet ab dem Wintersemester 2016/2017 den neu ausgerichteten und für sieben Jahre akkreditierten Bachelor-Studiengang „Informations- und Datenmanagement“ an, der ein informationswissenschaftliches Grundlagenstudium mit neuen Ausbildungsinhalten vor allem in den Bereichen Modellierung und automatisierte Verfahren verbindet. Die thematischen Schwerpunkte des methoden- und anwendungsorientierten Studiums sind dabei Datenmanagement, Informationsmanagement, Wissensmanagement und Information Retrieval.
Evaluation of corrosion resistance of powder coatings after various surface chemical pre-treatment
Authors: Draganovská D. , Brezinová J. 
Published: March 2017

Abstract
The surface treatment by a powder coating is one of the progressive technologies. Such coatings are resistant to corrosion and mechanical wearing. The quality of surface protection is affected primarily by a layer pre-treatment, the type of surface tretment, the system selection and the method and quality of application. Taking into account all the surface pre-tretment methods, the chemical pre-modification is a leading method. One of the methods is pre-treatment using a conversion coating which was developed on the nanotechnology basis - BONDRITE NT. That non-phosphate chemical pre-treatment is utilized at a surrounding temperature. It creates nano-ceramic protective layer on steel, zinc and aluminium surfaces, and as the result the coating has a significant adhesion. In the paper, the possibilities for the improvement of corrosion resistance of powder coatings using the subject conversion coating are presented at the current pasivation of respective surface.
Effects of Specific Fuel Consumption and Exhaust Emissions of Four Stroke Diesel Engine with CuO/Water Nanofluid as Coolant
Authors: Senthilraja S. , Vijayakumar KCK. , Gangadevi R. 
Published: March 2017

Abstract
This article reports the effects of CuO/water based coolant on specific fuel consumption and exhaust emissions of four stroke single cylinder diesel engine. The CuO nanoparticles of 27 nm were used to prepare the nanofluid-based engine coolant. Three different volume concentrations (i.e 0.05%, 0.1%, and 0.2%) of CuO/water nanofluids were prepared by using two-step method. The purpose of this study is to investigate the exhaust emissions (NOx), exhaust gas temperature and specific fuel consumption under different load conditions with CuO/water nanofluid. After a series of experiments, it was observed that the CuO/water nanofluids, even at low volume concentrations, have a significant influence on exhaust emissions. The experimental results revealed that, at full load condition, the specific fuel consumption was reduced by 8.6%, 15.1% and 21.1% for the addition of 0.05%, 0.1% and 0.2% CuO nanoparticles with water, respectively. Also, the emission tests were concluded that 881 ppm, 853 ppm and 833 ppm of NOx emissions were observed at high load with 0.05%, 0.1% and 0.2% volume concentrations of CuO/water nanofluids, respectively.
An Improved XFEM for the Poisson Equation with Discontinuous Coefficients
Authors: Stąpór Paweł 
Published: March 2017

Abstract
Discontinuous coefficients in the Poisson equation lead to the weak discontinuity in the solution, e.g. the gradient in the field quantity exhibits a rapid change across an interface. In the real world, discontinuities are frequently found (cracks, material interfaces, voids, phase-change phenomena) and their mathematical model can be represented by Poisson type equation. In this study, the extended finite element method (XFEM) is used to solve the formulated discontinuous problem. The XFEM solution introduce the discontinuity through nodal enrichment function, and controls it by additional degrees of freedom. This allows one to make the finite element mesh independent of discontinuity location. The quality of the solution depends mainly on the assumed enrichment basis functions. In the paper, a new set of enrichments are proposed in the solution of the Poisson equation with discontinuous coefficients. The global and local error estimates are used in order to assess the quality of the solution. The stability of the solution is investigated using the condition number of the stiffness matrix. The solutions obtained with standard and new enrichment functions are compared and discussed.
Estimation of Conditional Expected Value for Exponentially Autocorrelated Data
Authors: Kowalczyk Adam , Szlachta Anna , Hanus Robert , Chorzępa Rafał 
Published: March 2017

AbstractAutocorrelation of signals and measurement data makes it difficult to estimate their statistical characteristics. However, the scope of usefulness of autocorrelation functions for statistical description of signal relation is narrowed down to linear processing models. The use of the conditional expected value opens new possibilities in the description of interdependence of stochastic signals for linear and non-linear models. It is described with relatively simple mathematical models with corresponding simple algorithms of their practical implementation.The paper presents a practical model of exponential autocorrelation of measurement data and a theoretical analysis of its impact on the process of conditional averaging of data. Optimization conditions of the process were determined to decrease the variance of a characteristic of the conditional expected value. The obtained theoretical relations were compared with some examples of the experimental results.
Estimation of UAV Position with Use of Smoothing Algorithms
Authors: Kaniewski Piotr , Gil Rafał , Konatowski Stanisław 
Published: March 2017

Abstract
The paper presents methods of on-line and off-line estimation of UAV position on the basis of measurements from its integrated navigation system. The navigation system installed on board UAV contains an INS and a GNSS receiver. The UAV position, as well as its velocity and orientation are estimated with the use of smoothing algorithms. For off-line estimation, a fixed-interval smoothing algorithm has been applied. On-line estimation has been accomplished with the use of a fixed-lag smoothing algorithm. The paper includes chosen results of simulations demonstrating improvements of accuracy of UAV position estimation with the use of smoothing algorithms in comparison with the use of a Kalman filter.
Programmable Input Mode Instrumentation Amplifier Using Multiple Output Current Conveyors
Authors: Pankiewicz Bogdan 
Published: March 2017

Abstract
In this paper a programmable input mode instrumentation amplifier (IA) utilising second generation, multiple output current conveyors and transmission gates is presented. Its main advantage is the ability to choose a voltage or current mode of inputs by setting the voltage of two configuration nodes. The presented IA is prepared as an integrated circuit block to be used alone or as a sub-block in a microcontroller or in a field programmable gate array (FPGA), which shall condition analogue signals to be next converted by an analogue-to-digital converter (ADC). IA is designed in AMS 0.35 µm CMOS technology and the power supply is 3.3 V; the power consumption is approximately 9.1 mW. A linear input range in the voltage mode reaches ± 1.68 V or ± 250 µA in current mode. A passband of the IA is above 11 MHz. The amplifier works in class A, so its current supply is almost constant and does not cause noise disturbing nearby working precision analogue circuits.
Systematics and faunistics of Neotropical Eucosmini, 4: three new genera and their species (Lepidoptera: Tortricidae)
Authors: Razowski Józef , Becker Vitor Osmar 
Published: March 2017

Abstract
Three genera (Brasilnotia gen. n., Malinova gen. n., Tiburica gen. n.) and three species (Brasilnotia planaltinana sp. n., Malinova novaelimae sp. n., Tiburica paranae sp. n.) from Brazil are described and illustrated.
First record of Phytodietus moragai Gauld, 1997 (Hymenoptera: Ichneumonidae: Tryphoninae) from Ecuador, with a description of the female of this species
Authors: Kostro-Ambroziak Agata , Di Giovanni Filippo 
Published: March 2017

Abstract
Phytodietus moragai Gauld, 1997, previously known from Costa Rica, is recorded from Ecuador for the first time. This is the second representative of the genus Phytodietus Gravenhorst, 1829 from South America. A description and illustration of the female of P. moragai is provided.
Granuloma Annulare-like Wells Syndrome in a Child - A Case Report
Authors: Lekić Branislav , Gajić-Veljić Mirjana , Nikolić Miloš 
Published: March 2017

Abstract
Wells syndrome (WS) is a rare inflammatory skin disease of unknown etiology. Possible triggers for WS include insect bites/stings, infections, medications, malignancies, and vaccination. Most cases have been reported in adults, but WS may also occur in children.
We report a case of idiopathic WS in a 12-year-old boy, who presented with pruritic papulonodular and granuloma annulare-like lesions on his legs. The patient had an excellent response to topical and systemic corticosteroids.
WS may present as plaque, granuloma annulare-like, urticaria-like, papulovesicular, bullous, papulonodular, or fixed drug eruption-like lesions. Erythematous annular lesions are most common in adults, while plaques are mostly found in children. The histopathologic features are dynamic, starting with dermal edema and infiltration of eosinophils, then flame figures develop, and finishing with the appearance of histiocytes and giant cells.
Our patient represents a rare pediatric case with granuloma annulare-like WS syndrome.
Dermoscopy of difficult-to-diagnose Melanomas
Authors: Papageorgiou Chrysoula , Ioannides Demetrios , Apalla Zoe , Vakirlis Efstratios , Lazaridou Elisabeth , Sotiriou Eleni , Lallas Aimilios 
Published: March 2017

Abstract
Dermoscopy is a non-invasive procedure that allows the evaluation of cutaneous lesions, and is considered to be a useful tool that improves the diagnostic accuracy of melanoma. Many dermoscopic criteria of melanoma have been established and several algorithms have been created for melanoma detection. However, the recognition of some melanomas remains challenging. Melanomas on specific body sites, melanomas in patients with multiple atypical moles, and nodular melanomas represent the most difficult-to-recognize melanoma subtypes, since they typically lack the “classic” melanoma-specific criteria. This paper provides an update on dermoscopy of difficult-to-diagnose melanomas by summarizing the newest data. Lastly, we highlight the importance of digital dermoscopy in the follow-up of melanocytic lesions for the detection of incipient melanomas while maintaining a low excision rate.
The Determination of Some Pollution Parameters, Water Quality and Heavy Metal Concentrations of Aci Lake (Karapinar/Konya, Turkey)
Authors: Akköz Cengiz 
Published: March 2017

Abstract
Water quality parameters were measured in Acı Lake. The measurements were carried out in water samples taken from five different stations over ten months. According to the results of the analyses done on the samples of water, without taking into consideration the differences of seasons and stations, the average annual values of heavy metal concentrations for Cr, Cu and Ni were found to be 0.10 mg/l, 0.11 mg/l and 0.19 mg/l dry weight, respectively. Surprisingly, Co and Cd metals were not detected at any station or at any season. Other water quality parameters, namely pH, turbidity and nitrate, fall in the intermediate value range for these measures. The comparisons of the measured parameters and the metal concentration with the water quality index show that the water quality of Acı Lake prevents the water being used as irrigation water due to high salt levels.
Sleep Deprivation and Caffeine Treatment Potentiate Photic Resetting of the Master Circadian Clock in a Diurnal Rodent
Authors: Jha Pawan Kumar , Bouâouda Hanan , Gourmelen Sylviane , Dumont Stephanie , Fuchs Fanny , Goumon Yannick , Bourgin Patrice , Kalsbeek Andries , Challet Etienne 
Published: March 2017

Circadian rhythms in nocturnal and diurnal mammals are primarily synchronized to local time by the light/dark cycle. However, nonphotic factors, such as behavioral arousal and metabolic cues, can also phase shift the master clock in the suprachiasmatic nuclei (SCNs) and/or reduce the synchronizing effects of light in nocturnal rodents. In diurnal rodents, the role of arousal or insufficient sleep in these functions is still poorly understood. In the present study, diurnal Sudanian grass rats,Arvicanthis ansorgei, were aroused at night by sleep deprivation (gentle handling) or caffeine treatment that both prevented sleep. Phase shifts of locomotor activity were analyzed in grass rats transferred from a light/dark cycle to constant darkness and aroused in early night or late night. Early night, but not late night, sleep deprivation induced a significant phase shift. Caffeine on its own induced no phase shifts. Both sleep deprivation and caffeine treatment potentiated light-induced phase delays and phase advances in response to a 30 min light pulse, respectively. Sleep deprivation in early night, but not late night, potentiated light-induced c-Fos expression in the ventral SCN. Caffeine treatment in midnight triggered c-Fos expression in dorsal SCN. Both sleep deprivation and caffeine treatment potentiated light-induced c-Fos expression in calbindin-containing cells of the ventral SCN in early and late night. These findings indicate that, in contrast to nocturnal rodents, behavioral arousal induced either by sleep deprivation or caffeine during the sleeping period potentiates light resetting of the master circadian clock in diurnal rodents, and activation of calbindin-containing suprachiasmatic cells may be involved in this effect.SIGNIFICANCE STATEMENTArousing stimuli have the ability to regulate circadian rhythms in mammals. Behavioral arousal in the sleeping period phase shifts the master clock in the suprachiasmatic nuclei and/or slows down the photic entrainment in nocturnal animals. How these stimuli act in diurnal species remains to be established. Our study in a diurnal rodent, the Grass rat, indicates that sleep deprivation in the early rest period induces phase delays of circadian locomotor activity rhythm. Contrary to nocturnal rodents, both sleep deprivation and caffeine-induced arousal potentiate the photic entrainment in a diurnal rodent. Such enhanced light-induced circadian responses could be relevant for developing chronotherapeutic strategies.
Rivoluzione oligarchica o restaurazione della democrazia?
Authors: Marcaccini Carlo 
Published: March 2017

Summary
The number of the Five Thousand, established during the so-called oligarchic revolution in 411, could result from the procedure approved in 487/6 under the archonship of Telesinos (κλήρωσις ἐκ προκρίτων). The selection of the Five Thousand could be similar to the πρόκρισις of the candidates for the offices in the early fifth century. This could prove the hypothesis of de Ste. Croix: for him the Five Thousand had only the power to hold the offices and the teti were not excluded from the ekklesia. The patrioi nomoi of Cleisthenes, which, according to the Clitophon’s rider, had to be examined in order to modify the constitution, could have included the selection of five thousand candidates for the offices. Thus, the issue of the patrios politeia would not be mere propaganda, but could also imply actual provisions. The Five Thousand were not an oligarchy but a moderate democracy.
A covalently bound inhibitor triggers EZH2 degradation through CHIP‐mediated ubiquitination
Authors: Wang Xu , Cao Wei , Zhang Jianjun , Yan Ming , Xu Qin , Wu Xiangbing , Wan Lixin , Zhang Zhiyuan , Zhang Chenping , Qin Xing , Xiao Meng , Ye Dongxia , Liu Yuyang , Han Zeguang , Wang Shaomeng , Mao Li , Wei Wenyi , Chen Wantao 
Published: March 2017

AbstractEnhancer of zeste homolog 2 (EZH2) has been characterized as a critical oncogene and a promising drug target in human malignant tumors. The current EZH2 inhibitors strongly suppress the enhanced enzymatic function of mutant EZH2 in some lymphomas. However, the recent identification of a PRC2‐ and methyltransferase‐independent role of EZH2 indicates that a complete suppression of all oncogenic functions of EZH2 is needed. Here, we report a unique EZH2‐targeting strategy by identifying a gambogenic acid (GNA) derivative as a novel agent that specifically and covalently bound to Cys668 within the EZH2‐SET domain, triggering EZH2 degradation through COOH terminus of Hsp70‐interacting protein (CHIP)‐mediated ubiquitination. This class of inhibitors significantly suppressed H3K27Me3 and effectively reactivated polycomb repressor complex 2 (PRC2)‐silenced tumor suppressor genes. Moreover, the novel inhibitors significantly suppressed tumor growth in an EZH2‐dependent manner, and tumors bearing a non‐GNA‐interacting C668S‐EZH2 mutation exhibited resistance to the inhibitors. Together, our results identify the inhibition of the signaling pathway that governs GNA‐mediated destruction of EZH2 as a promising anti‐cancer strategy.