bluuebunny/crossref_metadata_2025 huggingface dataset:
Influence of different moisture regimes and n-fertilization on electrochemical changes and some nutrients in the leachate solution during growing period of rice plants
Authors: Siam Hanan , A.L. Saleh , M.R. Abd- El-Moez , S.H Holah , Zeid S.T Abou
Published: July 2015

A pot experiment was conducted in the greenhouse of NRC, Dokki, Giza, Egypt, using clay loam soil to study the effect of different moisture regimes (M1, M2 and M3) and fertilizer treatment(F0, F1, F2, F3, and F4) on electrochemical change and concentration of some nutrients in the leachate solution during growing period of rice plant (variety Sakha 102).The important results could be summarized in the follows: PH values showed the highest decreases under all the fertilizer treatments when the moisture regime of M1 was used followed by M2 and M3 in descending order. Furthermore, pH values showed higher decreases when the fertilizer treatment of F3 was used followed by F4, F2, F1 and F0 in decreasing order.Under all soil moisture regimes and fertilizer treatment Eh values sharply decreased during the 12 days after starting (DAS), then they decreased to the lowest values at 24 DAS. The soil moisture regimes decreased Eh values in soil solution during the growth period of rice plants. The highest decreases were obtained under soil moisture of M1 followed by M2 and M3 in descending order. The greatest decreases of Eh values were obtained by using the fertilizer treatment of F3 followed by F4, F2, F1 and F0 in descending order.Results showed that , P, K+, Fe++ and Mn++ concentrations in soil solution were higher in the early stages of rice plans and reached a peak at 24 days after staring (DAS), then the concentrations of all the studied nutrients gradually decreased with increasing the growth period.Inorganic N-fertilizer treatments (F1 and F2) gave higher nutrients concentrations under all soil moisture regimes as compared with N-organic fertilizer treatment alone (F4). Combination of organic and inorganic fertilizer (F3) gave the higher nutrients concentration in the leachate solutions followed by fertilizer treatments of F2, F1, F4 and F0 in decreasing order.The highest values of , P, K+, Fe++ and Mn++ concentrations were obtained at 24 days after starting (DAS) by using the fertilizer treatment of F3 under soil moisture regime of M1 (F3 M1Â¬) followed by F3M2 and F3M3 in decreasing order, while the lowest values were obtained at 72DAS under soil moisture regime of M3 and unfertilized treatment F0 (M3F0).
Peri-operative mortality and long-term survival after partial versus radical cystectomy for muscle invasive bladder cancer
Authors: Larcher Alessandro , Sun Maxine , Schiffmann Jonas , Tian Zhe , F. Shariat Shahrokh , McCormack Michael , Saad Fred , M. Buffi Nicolò , Briganti Alberto , Guazzoni Giorgio , Montorsi Francesco , I. Karakiewicz Pierre
Published: July 2015

Objective: The aim of the study was to compare partial cystectomy (PC) and radical cystectomy (RC) with respect to 90-day mortality as well as long-term, all cause (ACM) and cancer specific mortality (CSM).
Methods: Using the SEER-Medicare database 3913 patients with T2-T3 urothelial carcinoma of the urinary bladder (UCUB) who underwent either RC (n = 3419) or PC (n = 494) were identified. After propensity score matching to reduce potential treatment selection bias, 90-day mortality, ACM-free and CSM-free rates between patients treated with PC and RC were estimated. Multivariable regression models (MVA) addressed 90-day mortality as well as 5-years ACM and CSM.
Results: After matching, 33% (n = 494) and 67% (n = 988) patients treated respectively with PC or RC remained. Median follow-up was 26 months. The 90-day mortality rate was 3.2% (n = 16) after PC and 8.1% (n = 80) after RC (P = 0.001). In MVA, PC vs. RC was associated with a lower 90-day mortality (P < 0.001). At 5 years the ACM-free survival rate was 38% after PC and 40% after RC (P = 0.3) and failed to differ in MVA (P = 0.9). At 5 years the CSM-free survival rate was 59% after PC and 62% after RC (P = 0.2) and also failed to differ in MVA (P = 0.57). The same results were observed after restriction to patients with pT2N0 UCUB.
Conclusions: Relative to RC, PC is associated with lower short-term mortality and the same long-term ACM and CSM rates. These observations should encourage greater consideration to PC in those selected cases when this type of surgery may be applied.
Vulkanland Case Study: Transformative Regional Development
Authors: Ober Michael
Published: July 2015

After being an economic backwater, the southeastern Austrian border region enjoys economic boom today. The decisive factor for the turnaround was a regional development process that had its first steps in 1995. The region was suffering from low education, had the national lowest income rate, no industrial development, no infrastructure, little self-esteem and a lack of job opportunity. The initiators of the project were thinking of a different way of measuring progress and started imagining a future built on different standards. Due to profound research activities, the initiators came to the conclusion that mega projects won’t entail sustainable solutions or future-competence. Hence, they turned their focus to their habitat – their region. To in-valuate the living space, a new identity that was representative, gained recognition and reinforced the peoples self-confidence. In 2001 the new identity ‘Steirisches Vulkanland’ was born. The vision throughout the entire development process was to transform the border region with little chances into an innovative, worth living region ‘Steirisches Vulkanland’ within a period of 15 years. In 2010 their vision seems to be achieved, 79 municipalities together promote successfully local, green, self-sustaining businesses. Yet, the development process is still going on, heading for new, courageous, challenging visions like achieving energy independence by the year 2025.
Community Participation and Consumer-to-Consumer Helping: Does Participation in Third Party–Hosted Communities Reduce One's Likelihood of Helping?
Authors: Thompson Scott A. , Kim Molan , Smith Keith Marion
Published: July 2015

Third party–hosted consumer communities in general, and brand communities in particular, have been touted for their ability to generate value for firms by promoting consumer-to-consumer (C2C) helping. However, little research has examined whether consumer communities actually foster C2C helping, and who is helped. In contrast, the brand-community literature suggests community strategies may reduce the likelihood of community members helping non–community members. If so, strategies that promote third party–hosted brand or product-category communities may be counterproductive in fostering C2C helping. Should firms focus on promoting brand communities, promoting product-category communities, or both? On the basis of a hazard model analysis of 9,192 actual C2C helping events over a 25-month period, and supported by a second cross-sectional study, this article examines how participation in brand and product-category communities influences one's likelihood of helping others. We find that brand-community participation increases one's likelihood of helping fellow members while reducing the likelihood of helping members of rival brand communities. Surprisingly, product-category community participation reduces one's likelihood of helping members of brand communities. The authors discuss managerial recommendations.
Synergistic Effects of Age on Patterns of White and Gray Matter Volume across Childhood and Adolescence
Authors: Bray Signe , Krongold Mark , Cooper Cassandra , Lebel Catherine
Published: July 2015

The human brain develops with a nonlinear contraction of gray matter across late childhood and adolescence with a concomitant increase in white matter volume. Across the adult population, properties of cortical gray matter covary within networks that may represent organizational units for development and degeneration. Although gray matter covariance may be strongest within structurally connected networks, the relationship to volume changes in white matter remains poorly characterized. In the present study we examined age-related trends in white and gray matter volume using T1-weighted MR images from 360 human participants from the NIH MRI study of Normal Brain Development. Images were processed through a voxel-based morphometry pipeline. Linear effects of age on white and gray matter volume were modeled within four age bins, spanning 4-18 years, each including 90 participants (45 male). White and gray matter age-slope maps were separately entered intok-means clustering to identify regions with similar age-related variability across the four age bins. Four white matter clusters were identified, each with a dominant direction of underlying fibers: anterior–posterior, left–right, and two clusters with superior–inferior directions. Corresponding, spatially proximal, gray matter clusters encompassed largely cerebellar, fronto-insular, posterior, and sensorimotor regions, respectively. Pairs of gray and white matter clusters followed parallel slope trajectories, with white matter changes generally positive from 8 years onward (indicating volume increases) and gray matter negative (decreases). As developmental disorders likely target networks rather than individual regions, characterizing typical coordination of white and gray matter development can provide a normative benchmark for understanding atypical development.
The Transcription Repressor REST in Adult Neurons: Physiology, Pathology, and Diseases
Authors: Baldelli Pietro , Meldolesi Jacopo
Published: July 2015

REST [RE1-silencing transcription factor (also called neuron-restrictive silencer factor)] is known to repress thousands of possible target genes, many of which are neuron specific. To date, REST repression has been investigated mostly in stem cells and differentiating neurons. Current evidence demonstrates its importance in adult neurons as well. Low levels of REST, which are acquired during differentiation, govern the expression of specific neuronal phenotypes. REST-dependent genes encode important targets, including transcription factors, transmitter release proteins, voltage-dependent and receptor channels, and signaling proteins. Additional neuronal properties depend on miRNAs expressed reciprocally to REST and on specific splicing factors. In adult neurons, REST levels are not always low. Increases occur during aging in healthy humans. Moreover, extensive evidence demonstrates that prolonged stimulation with various agents induces REST increases, which are associated with the repression of neuron-specific genes with appropriate, intermediate REST binding affinity. Whether neuronal increases in REST are protective or detrimental remains a subject of debate. Examples of CA1 hippocampal neuron protection upon depolarization, and of neurodegeneration upon glutamate treatment and hypoxia have been reported. REST participation in psychiatric and neurological diseases has been shown, especially in Alzheimer’s disease and Huntington’s disease, as well as epilepsy. Distinct, complex roles of the repressor in these different diseases have emerged. In conclusion, REST is certainly very important in a large number of conditions. We suggest that the conflicting results reported for the role of REST in physiology, pathology, and disease depend on its complex, direct, and indirect actions on many gene targets and on the diverse approaches used during the investigations.
Differential pre-mRNA Splicing Alters the Transcript Diversity of Helitrons Between the Maize Inbred Lines
Authors: Lynch Brian T , Patrick Tara L , Moreno Jennifer J , Siebert Amy E , Klusman Katarina M , Shodja Donya N , Hannah L Curtis , Lal Shailesh K
Published: July 2015

The propensity to capture and mobilize gene fragments by the highly abundant Helitron family of transposable elements likely impacts the evolution of genes in Zea mays. These elements provide a substrate for natural selection by giving birth to chimeric transcripts by intertwining exons of disparate genes. They also capture flanking exons by read-through transcription. Here, we describe the expression of selected Helitrons in different maize inbred lines. We recently reported that these Helitrons produce multiple isoforms of transcripts in inbred B73 via alternative splicing. Despite sharing high degrees of sequence similarity, the splicing profile of Helitrons differed among various maize inbred lines. The comparison of Helitron sequences identified unique polymorphisms in inbred B73, which potentially give rise to the alternatively spliced sites utilized by transcript isoforms. Some alterations in splicing, however, do not have obvious explanations. These observations not only add another level to the creation of transcript diversity by Helitrons among inbred lines but also provide novel insights into the cis-acting elements governing splice-site selection during pre-mRNA processing.
Chromatin Signature Identifies Monoallelic Gene Expression Across Mammalian Cell Types
Authors: Nag Anwesha , Vigneau Sébastien , Savova Virginia , Zwemer Lillian M , Gimelbrant Alexander A
Published: July 2015

Monoallelic expression of autosomal genes (MAE) is a widespread epigenetic phenomenon which is poorly understood, due in part to current limitations of genome-wide approaches for assessing it. Recently, we reported that a specific histone modification signature is strongly associated with MAE and demonstrated that it can serve as a proxy of MAE in human lymphoblastoid cells. Here, we use murine cells to establish that this chromatin signature is conserved between mouse and human and is associated with MAE in multiple cell types. Our analyses reveal extensive conservation in the identity of MAE genes between the two species. By analyzing MAE chromatin signature in a large number of cell and tissue types, we show that it remains consistent during terminal cell differentiation and is predominant among cell-type specific genes, suggesting a link between MAE and specification of cell identity.
Bitter Substances in the Hop Lupulin
Authors: Liashenko M. , Protsenko L. , Rudyk R. , Svirchevska O.
Published: July 2015

Aim. To investigate the quantity and structure of α-, β-acids and xanthohumol in lupulin grains of different hop varieties that essentially differ in these biochemical indexes, and also the presence of the substances both in staminate racemes and in the leaves. Methods. High performance liquid chromatography (HPLC), up-to- date physical-chemical methods of hop quality indicators’ defi nition, special and standard in the hop-growing branch, were applied. Results. It was stated that lupulin of aroma and bitter varieties contains various quantity of α- and β-acids. Therefore, the ratio of α- to β-acids in aroma hop varieties is above one (1), whereas in varieties of bitter type this ratio is much lower than one (1). No correlation between the quantity of lupulin and the contents of α- and β-acids was found. It was noted that the color of lupulin depends upon the quantity of xanthohumol. Conclusions. The performed tests give evidences on lupulin glands are located on anthers of staminate racemes and on the
leaves as well, though in much less quantity and less educed. It was found that the quantity and structure of bitter substances in lupulin grains from selection varieties does not depend upon lupulin content in hop cones, but it is a grading factor. Lupulin from the staminate racemes received from various plants essentially differs in quantity of α- and β-acids. This fact is of key importance for pair selection. In petal glands on the leaves of a hop plant bitter substances are represented only by β-acids, mainly lupulone and adlupulone.
Molecular Epidemiology Issues of BVDV Infection in the Eastern Ukraine
Authors: Stegniy B. , Gerilovych A. , Vilcek S. , Peterhans E. , Kucheriavenko R. , Stegniy M. , Goraichuk I. , Bolotin V. , Solodiankin O.
Published: July 2015

Aim. This study was focused on (i) detection of specifi c BVDV-antibodies within selected cattle farms, (ii) identifi cation of persistently infected (PI) animals and (iii) genetic typing of selected BVDV isolates. Methods. RNA extraction, real-time polymerase chain reaction, ELISA technique, sequencing. Results. Specifi c BVDV- antibodies were detected in 713 of 1,059 analyzed samples (67.3 per cent). This number is in agreement with fi ndings in many cattle herds around the world. However, the number of positive samples differed in the herds. While 57 samples out of 283 (20.1 per cent) were identifi ed in the fi rst herd, 400 out of 475 (84.2 per cent) and 256 out of 301 (85 per cent) animals were positive in the second and third herd. High number of animals with BVDV RNA was detected in all herds. The real-time PCR assay detected BVDV RNA in 5 of 1068 samples analyzed (0.5 per cent). 4 positive samples out of 490 (0.8 per cent) and 1 out of 301 (0.33 per cent) were found in the second and third herd. The
genetic materials of BVDV were not found in the fi rst herd. Data on the number of PI animals were in accord with serological fi ndings in the cattle herds involved in our study. The genetic typing of viral isolates revealed that only BVDV, Type 1 viruses were present. The phylogenetic analysis confi rmed two BVDV-1 subtypes, namely b and f and revealed that all 4 viruses from the second farm were typed as BVDV-1b and all of them were absolutely identical in 5’-UTR, but virus from the third farm was typed as BVDV-1f. Conclusion. Our results indicated that the BVDV infection is widespread in cattle herds in the eastern Ukraine, that requires further research and development of new approaches to improve the current situation.
Nitrogen-Affected Florasulam and Pinoxaden Metabolism in Winter Wheat
Authors: Mykhalska L. , Omelchuk S. , Schwartau V.
Published: July 2015

Aim. To create environmentally friendly technologies for agrochemicals’ integrated application, pinoxaden and fl orasulam metabolism at the nitrogen action were tested in wheat plants. Methods. High performance liquid chromatography (HPLC) of pinoxaden, fl orasulam and their metabolites in wheat plants. Results. The application of the Derby herbicide combined with Axial graminicide and nitrogen does not lead to an increase in residual amounts of fl orasulam and DE 570 BIH metabolite, while the application of Axial in mixtures with Derby herbicide and nitrogen does not cause an increase in residual amounts of major pinoxaden M04, M06 and M10 metabolites in winter wheat grain. Conclusions. The herbicidal composition of Derby, Axial and carbamide was establi shed to be safe for use in crop production. It also effi ciently controls main types of deleterious weeds in winter wheat fi elds.
Polymorphism of the gene pol of the bovine leukemia virus
Authors: Gerilovych A. , Stegniy B. , Limanska O. , Gorbatenko S.
Published: July 2015

As a representative of RNA-containing viruses, the causative agent of bovine leukemia (BLV) is characterized by the signifi cant level of genetic variability which results in considerable information content of phylogenic studies of its populations. Aim. This study is aimed at exploring the sequence of 440 bp long fragment of the pol gene of BLV in three farms in the Eastern Ukraine. Methods. The polymerase chain reaction, sequencing and standard methods of isolating nucleic acids have been used. Results. The sequencing and the sequence analysis of the pol gene demonstrated the presence of three variants of sequences, corresponding to the isolates, identifi ed in Kharkiv and Sumy regions and the sample of the proviral DNA from the FLK-BLV culture. Con- clusions. The genetic homology of the sequences of the characterized isolates to the populations of viruses, circulating in the territory of Europe and the European part of the Russian Federation, has been established.
PROGRAMAS DE TRANSFERENCIAS CONDICIONADAS Y LA POLITIZACION DE LAS ESTRATEGIAS DE REDUCCIÓN DE LA POBREZA
Authors: Bucheli Juan Fernando
Published: July 2015

Los programas de transferencias monetarias condicionadas (CCT en inglés), en América Latina, se han caracterizado por emplear un enfoque cerrado de arriba hacia abajo, en donde las coaliciones entre políticos y tecnócratas han terminado por establecer un sistema de incentivos clientelistas como la interacción más conveniente con los beneficiarios de programas sociales. La existencia de este tipo de relaciones ha obligado a los beneficiarios a formar parte de alianzas políticas a largo plazo, a cambio de beneficios económicos. Lo que pareciera ser relación simbiótica para las partes, finalmente podría ser una relación con consecuencias negativas en términos de valores democráticos y un costo de oportunidad financiero para emprender otro tipo de inversiones sociales más eficientes. Entre más exista este tipo intercambio, mayor será la dependencia de este tipo de recursos en la región.
POLÍTICA EXTERNA PARA LA INTEGRACIÓN FRONTERIZA A PARTIR DEL CASO DE LA TRIPLE FRONTERA BRASIL, COLOMBIA Y PERÚ EN LOS GOBIERNOS DE LULA, URIBE Y GARCÍA (2006-2011)
Authors: Londoño Niño Edgar Andrés
Published: July 2015

En éste artículo, se hace referencia a algunos de los elementos en materia fronteriza de la política exterior de Lula (2006-2011), Uribe (2006-2010) y García (2006-2011), a partir de factores domésticos, lineamientos de la política exterior y relaciones bilaterales con los vecinos alrededor del caso de la Triple Frontera Brasil, Colombia y Perú. El artículo resalta que Brasil en ese periodo dio una mayor atención a la Triple Frontera que sus vecinos, en concordancia con las orientaciones de la política exterior para la región y para Amazonía. Perú, consolidó su interés económico en su parte amazónica sin dar mayor atención a la región fronteriza estudiada.
Colombia, se centró en la lucha contra la guerrilla y la defensa de su política de seguridad. Se demuestra cómo la política exterior resulta fundamental para analizar los límites y las posibilidades de procesos de integración
fronteriza.
GOBIERNO LOCAL EN LA FRONTERA COLOMBO VENEZOLANA EN MEDIO DEL DISTANCIAMIENTO BINACIONAL
Authors: Jiménez Aguilar Carlos Manuel
Published: July 2015

La dinámica fronteriza colombo venezolana, en medio de uno de sus logros más significativos como fue la aprobación de la Zona de Integración Fronteriza (ZIF) en el año 2006, experimentó de manera simultanea una parálisis en su implementación y un distanciamiento duradero en sus relaciones binacionales. A través de entrevistas a actores locales públicos y privados de los proyectos y alianzas entre las cámaras de comercio y gremios privados de las ciudades de Cúcuta (Colombia) y Ureña, San Antonio y San Cristóbal (Venezuela), esta investigación identificó una tendencia hacia un modelo de gobernanza local en el departamento Norte de Santander y un modelo de planeación centralista y anti empresa en el estado Táchira. Se encontraron dinámicas de cooperación interinstitucional y gobernanza transfronteriza en torno al sector turístico.
¿PRESIDENTES DESATADOS?: REELECCIÓN PRESIDENCIAL Y CAMBIO INSTITUCIONAL EN EL ÁREA ANDINA
Authors: Acuña Villarraga Fabián Alejandro
Published: July 2015

El presente artículo analiza la reelección presidencial en los países andinos. El debate se aborda desde la perspectiva de Jon Elster quien interpreta el constitucionalismo como un mecanismo de compromisos previos, en el que se establecen amarres o limitaciones institucionales para evitar que en tiempo futuro el gobernante se extra-limite por el exceso de poder –“cantos de sirena”–. En este sentido se establecen trayectorias que permitieron-restringieron la reelección presidencial en los países del área andina, en las que la influencia del gobernante en ejercicio fue determinante para sus diferentes desenlaces: auto-marre, des-amarre institucional, o amarrar a “otros”.
LA REGIÓN ANDINA EN LA GEOPOLÍTICA DE LOS RECURSOS ESTRATÉGICOS
Authors: Rojas Diana Marcela
Published: July 2015

En la economía globalizada de principios del siglo XXI, las potencias rivalizan por el acceso y control de los recursos estratégicos a nivel planetario; en virtud de su dotación natural y la orientación de sus actuales políticas económicas, los países andinos juegan en esta disputa un papel significativo. Esta posición de relevancia les ha planteado el doble reto de desarrollar una estrategia de diversificación de sus relaciones económicas con miras a beneficiarse del auge económico actual, por un lado; así como de adquirir un mayor margen de
maniobra en el escenario internacional para impulsar otros temas de sus agendas exteriores, del otro. Sin embargo, no existe consenso en torno a la mejor manera de emplear esos recursos en pos del crecimiento y desarrollo económico nacional sostenible y a largo plazo, ni tampoco acerca de cómo aprovechar la coyuntura para mejorar el posicionamiento internacional de la región en su conjunto.
The conditions of provable security of block ciphers against truncated differential attack
Authors: Ruzhentsev Victor
Published: July 2015

The modified method of estimation of the resistance of block ciphers to truncated byte differential attack is proposed. The previously known method estimate the truncated byte differential probability for Rijndael-like ciphers. In this paper we spread the sphere of application of that method on wider class of ciphers. The proposed method based on searching the most probable truncated byte differential characteristics and verification of sufficient conditions of effective byte differentials absence.
A novel cryptosystem based on abstract automata and Latin cubes
Authors: Dömösi Pál , Horváth Géza
Published: July 2015

In this paper we introduce a novel block cipher based on the composition of abstract finite automata and Latin cubes. For information encryption and decryption the apparatus uses the same secret keys, which consist of key-automata based on composition of abstract finite automata such that the transition matrices of the component automata form Latin cubes. The aim of the paper is to show the essence of our algorithms not only for specialists working in compositions of abstract automata but also for all researchers interested in cryptosystems. Therefore, automata theoretical background of our results is not emphasized. The introduced cryptosystem is important also from a theoretical point of view, because it is the first fully functioning block cipher based on automata network.
Cryptanalysis of the HaF family of hash functions
Authors: Buczek Mateusz , Kontak Marcin
Published: July 2015

HaF is a family of hash functions developed in Poland at Poznán University of Technology, see [1, 2]. It is a classical Merkle-Damgård construction with the output sizes of 256, 512 or 1024 bits. In this paper we present a collision attack with negligible complexity (collisions can be found without using a computer) for all the members of HaF family. We have also shown that the improved function (without the critical transformation) is still insecure. It is possible to find a preimage for a short message with the complexity lower than the exhaustive search. We are also able to create some fixed points with a complexity of single compression function call.
On optimal size in truncated differential attacks
Authors: Courtois Nicolas T. , Mourouzis Theodosis , Grocholewska-Czuryło Anna , Quisquater Jean-Jacques
Published: July 2015

Differential Cryptanalysis (DC) is one of the oldest known attacks on block ciphers. DC is based on tracking of changes in the differences between two messages as they pass through the consecutive rounds of encryption. However DC remains very poorly understood. In his textbook written in the late 1990s Schneier wrote that against differential cryptanalysis, GOST is “probably stronger than DES”. In fact Knudsen have soon proposed more powerful advanced differential attacks however the potential space of such attacks is truly immense. To this day there is no method which allows to evaluate the security of a cipher against such attacks in a systematic way. Instead, attacks are designed and improved in ad-hoc ways with heuristics [6–13,21]. The best differential attack known has time complexity of 2179 [13].

In this paper we show that for a given block cipher there exists an optimal size for advanced differential properties. This new understanding allows to considerably reduce the space to be searched for “good” truncated differential properties suitable for an attack.
Hierarchy for classes of garbling schemes
Authors: Meskanen Tommi , Niemi Valtteri , Nieminen Noora
Published: July 2015

The methods for secure outsourcing and secure one-time programs have recently been of great research interest. Garbling schemes are regarded as a promising technique for these applications while Bellare, Hoang and Rogaway introduced the first formal security notions for garbling schemes in [3, 4]. Ever since, even more security notions have been introduced and garbling schemes have been categorized in different security classes according to these notions. In this paper, we introduce new security classes of garbling schemes and build a hierarchy for the security classes including the known classes as well as classes introduced in this paper.
Siren: Secure data sharing over P2P and F2F networks
Authors: Kasza Péter , Ligeti Péter , Nagy Ádám
Published: July 2015

In this paper we propose a decentralized privacy-preserving system which is able to share sensible data in a way, that only predefined subsets of authorized entities can recover the data after getting an additional alarm message. The protocol uses two main communication channels: a P2P network where the encrypted information is stored, and a smaller private P2P network, which consists of the authorized parties called friend-to-friend network. We describe the communication protocol fulfilling the desired security requirements. The proposed protocol achieves unconditional security. The main cryptographic building blocks of the protocol are symmetric encryption schemes and secret sharing schemes.
Fast Response Beam Coupling in Dye Doped Liquid Crystal Cells Sandwiched with ZnSe Coated Substrates
Authors: Xue Tingyu , Zhao Hua , Meng Cuiling , Fu Jiayin , Zhang Jingwen
Published: July 2015

In this paper we present fast response processes in dye doped liquid crystal cell with ZnSe layers on electrodes. Two-wave mixing and grating monitoring experiments were performed to characterize this liquid crystal system. With the help of photoconductive layers, the response time was reduced to a few milliseconds, which improved further the response rate in liquid crystal photorefractive system. A peak in response time versus applied voltage and unexpected oscillations in diffraction efficiency dynamics were observed, which implies unconventionally complex charge dynamics associated with SPPs excited at one of the photoconductive layer/liquid crystal interfaces.
Mechanism of Ca-Ba diffusion in lead-free (Ba,Ca)TiO3 piezoelectrics
Authors: Shu Chang , Reed Daniel , Button Tim
Published: July 2015

The reaction mechanism of BaCO3+CaCO3+TiO2 by solid state methods has been studied in this work using thermal analysis (DSC-TG) from 500 to 1500 °C and in situ X-ray diffraction (XRD) from room temperature to 800 °C. In the mixed powders, the CaO is firstly formed followed by presence of an intermediate Ba2TiO4 phase and finally the formation of CaTiO3, BaTiO3 and/or (Ba,Ca)TiO3, where the presence of CaO or CaTiO3 (CT) has slowed down the formation of BaTiO3 (BT). Raman microscopy of a BT-CT diffusion couple has shown that Ca2+ firstly diffuses into the BT grain boundaries and then into the BT core.
Stoichiometry of GaAs nanodots on GaAs(001)
Authors: Haghizadeh Anahita , Yang Haeyeon
Published: July 2015

We present a strain-free, self-assembled GaAs nanodots on GaAs(001) surfaces. Nanodots are studied by atomic force microscopy and field emission scanning electron microscopy. Nanodots self-assemble on the GaAs surface when two laser pulses overlap on the surface interferentially. Their stoichiometry is characterized by energy dispersive X-ray spectroscopy in the electron microscope. For the stoichiometry study, electrons with voltages less than 5 kilovolts were used to produce the characteristic X-rays from dots in order to enhance the surface sensitivity. The stoichiometric analysis indicates that the nanodots’ relative composition ratio of Ga over As reaches to that of GaAs substrate when the dot size becomes smaller than 100 nm. The chemical analysis suggests a novel route of strain-free semiconductor nanodots.
Plasmon optics and thermal dissipation in nanocomposite thin films
Authors: Dunklin Jeremy R. , Forcherio Gregory T. , Berry Keith R. , Roper D.K.
Published: July 2015

Optical properties and thermal relaxation dynamics of resonantly excited plasmons are important in applications for optoelectronics, biomedicine, energy, and catalysis. Geometric optics of polydimethylsiloxane (PDMS) thin films containing uniformly or asymmetrically distributed polydisperse reduced AuNPs or uniformly distributed monodisperse solution-synthesized AuNPs were recently evaluated using a compact linear algebraic sum. Algebraic calculation of geometric transmission, reflection, and attenuation for AuNP-PDMS films provides a simple, workable alternative to effective medium approximations, computationally expensive methods, and fitting of experimental data. This approach allows for the summative optical responses of a sequence of 2D elements comprising a 3D assembly to be analyzed. Thin PDMS films containing 3-7 micron layers of reduced AuNPs were fabricated with a novel diffusive-reduction synthesis technique. Rapid diffusive reduction of AuNPs into asymmetric PDMS thin films provided superior photothermal response relative to thicker films with AuNPs reduced throughout, with a photon-to-heat conversion of up to 3000°C/watt which represents 3-230-fold increase over previous AuNP-functionalized systems. Later work showed that introduction of AuNPs into PDMS enhanced thermoplasmonic dissipation coincident with internal reflection of incident resonant irradiation. Measured thermal emission and dynamics of AuNP-PDMS thin films exceeded emission and dynamics attributable by finite element analysis to Mie absorption, Fourier heat conduction, Rayleigh convection, and Stefan-Boltzmann radiation. Refractive-index matching experiments and measured temperature profiles indicated AuNP-containing thin films internally reflected light and dissipated power transverse to the film surface. Enhanced thermoplasmonic dissipation from metal-polymer nanocomposite thin films could affect opto- and bio-electronic implementation of these systems.
Using Mixed Methods In Music Therapy Health Care Research: Reflections On the Relationship Between the Research Question, Design and Methods in the Research Project Receptive Music Therapy With Female Cancer Patients in Rehabilitation
Authors: Bonde Lars Ole
Published: July 2015

“Mixed  methods” (or “multiple methods” or “multiple strategy”) research design is a fairly new concept in music therapy research. It is inspired by recent methodological developments in the social sciences, covering the interaction of quantitative and qualitative methods in one and the same research study. Mixed methods are not the same as the diversity or pluralism of methods advocated by many scholars who are critical towards the principles of evidence-based practice. This article presents an example of mixed methods in music therapy research: a psycho-social study of music therapy with female cancer survivors. Problems related to ontology, epistemology, design and methodology are illustrated and discussed, and the perspective is broadened into a discussion of the core concepts of triangulation as related to validity.
Kodály Approach in the Crossroad of Education and Therapy
Authors: Tiszai Luca
Published: July 2015

Kodály's concept about music education is worldwide adapted to different cultures. However, the significance of his theoretical framework is almost undiscovered by music therapy. The aim of the present paper is to shed light on the common elements of Commuity Music Therapy and the Kodály Approach by literature-based Research. Kodály was a pioneer establishing a multidisciplinary dialog between musicology, philosophy, sociology and education. The practice and theory he established was a powerful response to his time’s social needs and problems. As a musician an educator he devoted himself to the popularization community music, choral singing and thus building up a better society. As a researcher he studied the therapeutic effects of his method, especially transfer effect with intellectual and social skills. His overall goal to make music accessible to everyone highly resemble with Community Music Therapy. Many of his ideas such us choral singing for social connectedness or agency and empowerment through musical education are a part of the practice of Community Music Therapy. His concept is a fundamental part of music education but music therapy also could profit more from his ideas.
Choosing the Right Interpreter: Reflections on My Experience
Authors: Schwantes Melody
Published: July 2015

Music therapists are now frequently working outside of their own cultures with individuals who may speak a different language from them. While music can be one vehicle of connecting and communicating with clients, oftentimes an interpreter is still necessary. This article presents an overview of my personal experience working with interpreters in various settings. Benefits and challenges of working with an interpreter are discussed as well as recommendations for working with interpreters. It is hoped that this article will create a dialogue among the Voices community about working with interpreters in the music therapy setting.Keywords: music therapy, interpreter, relationships
An Interview with Denise Grocke: Discussing GIM and its Adaptations
Authors: Montgomery Erin
Published: July 2015

This interview with Denise Grocke discusses her paths to music therapy and GIM as well as her integral role in the history of the Australian Music Therapy Association (AMTA) and the Music and Imagery Association of Australia (MIAA). Denise speaks about her interviews with Helen Bonny for her PhD thesis, and her recently published textbook Guided Imagery & Music (GIM) and Music Imagery Methods for Individual and Group Therapy, (co-edited with Torben Moe). Dr. Grocke discusses GIM and its adaptations as well as future directions for GIM research.
Membranas híbridas com potencial uso em células a combustível - parte 1: nanocompósitos de poli(eterimida) sulfonada
Authors: Gomes Ana Catarina de Oliveira , Uieda Beatriz , Tamashiro Andre Akio , Ruvolo Filho Adhemar Collà , Pessan Luiz Antonio , Paranhos Caio Marcio
Published: July 2015

Células a combustível usando membranas poliméricas condutoras de íons representam uma alternativa interessante para substituição de matrizes energéticas convencionais baseadas em combustíveis fósseis e para a geração de energia com mínimo impacto ambiental. Entretanto, as membranas poliméricas atualmente disponíveis apresentam certas propriedades intrínsecas que diminuem a eficiência e a durabilidade sob uso das células construídas, sendo as principais desvantagens o limite de temperatura de uso (devido a necessidade de presença de água para a condução iônica) e suscetibilidade a degradação mecânica, térmica e química. O presente trabalho tem como objetivo a obtenção, caracterização e avaliação do desempenho de membranas poliméricas híbridas baseadas em poli(éter imida) (PEI), um polímero com excelente resistência mecânica e química, e cuja condutividade protônica independe da presença de água, possibilitando o uso a temperaturas mais elevadas. As membranas poliméricas baseadas em poli(éter imida) foram modificadas quimicamente visando o aumento em seu caráter de condutor iônico. A incorporação de um argilomineral com escala nanométrica visou um aumento na resistência mecânica e térmica das membranas obtidas, condições fundamentais para a durabilidade sob uso de células a combustível, além de aumento de propriedades de barreira em relação aos gases de processo. As membranas foram avaliadas por FTIR, DSC, TGA, DMA, densidade, inchamento em água, transmissão de vapor de água e resistência à migração iônica. Os resultados obtidos são promissores, visto que foi possível alterar a propriedade condutora da membrana, sem perdas excessivas na resistência térmica e mecânica.
Desenvolvimento de surfatantes para aplicação na indústria de explosivos
Authors: Lopes Luciana Rodrigues Barreto , Soares Vera Lúcia Pereira , Barcellos Maria Teresa C. , Mansur Claudia Regina Elias
Published: July 2015

A comercialização dos explosivos emulsionáveis, aí incluída a dinamite de ANFO, acarretou um aumento significativo no consumo mundial de explosivos entre 1960 e 1980, conseqüência da maior segurança no transporte e no preparo dos explosivos na forma de uma emulsão. Os surfatantes utilizados nestas emulsões são ésteres, amidas ou imidas derivadas do poliisobutileno com terminações de anidrido succínico (PIBSA). Neste trabalho, surfatantes derivados da reação do PIBSA com polioxietilenodiaminas foram sintetizados e caracterizados pelas técnicas de espectrometria no infravermelho e de cromatografia de exclusão de tamanho. Os surfatantes sintetizados foram avaliados quanto ao efeito das suas estruturas na redução da tensão interfacial do sistema água em óleo e todos foram capazes de reduzir a tensão interfacial deste sistema.
Preparação de novos nanobiocompósitos comestíveis ativos contendo nanoemulsão de canela e pectina
Authors: Moura Marcia Regina de , Aouada Fauze Ahmad , Souza Juliana Reghine , Mattoso Luiz Henrique Capparelli
Published: July 2015

Neste trabalho, o objetivo foi produzir nanobiocompósitos biodegradáveis à base de pectina e nanoemulsão de canela que tenham propriedades satisfatórias para aplicação como embalagens ativas. Foram detalhados os procedimentos de preparação das nanoemulsões e incorporação dessas na matriz polimérica. Foi apresentada uma metodologia nova de análises dos melhores nanocompósitos através de um planejamento baseado em aspectos visuais que nos forneceu resultados interessantes. Os nanocompósitos obtidos foram analisados através de: medidas de espessura, solubilidade, propriedades mecânicas e microscopia eletrônica de varredura (MEV). Resultados das análises visuais mostraram que os nanocompósitos produzidos com concentração de pectina de 2% m/v e nanoemulsões preparadas com velocidade de agitação de 16000 rpm em 2 minutos mostraram melhores condições para serem aplicados como embalagens. Resultados de propriedades mecânicas demonstraram que nanocompósitos contendo nanoemulsões com tamanhos menores de gotículas apresentam maior resistência e elongação, além de serem menos solúveis. O controle dessas propriedades com a variação de tamanho médio das nanoemulsões torna esses materiais potencialmente viáveis, por exemplo, em embalagens ativas.
Filmes de polipirrol aplicados no desenvolvimento de eletrodos descartáveis seletivos a íons fluoreto
Authors: Lamy-Mendes Alyne Cristina , Bindewald Eduardo Henrique , Papi Maurício Alberto Poletti , Marcolino-Jr Luiz Humberto , Bergamini Márcio Fernando
Published: July 2015

O presente manuscrito descreve o desenvolvimento de um sensor descartável sensível e seletivo baseado em filmes de polipirrol dopados (PPy) para determinação íons fluoreto. Os íons fluoretos foram incorporados na matriz PPy durante a polimerização eletroquímica realizada em condições galvanostáticas em um eletrodo compósito etileno vinil acetato e negro de fumo. Parâmetros experimentais envolvidos na preparação de película PPy tais como densidade de corrente elétrica, carga elétrica, o pH e a concentração de eletrólito foram otimizados de forma a maximizar a resposta potenciométrica. A resposta do sensor para íons de flúor foi linear no intervalo de concentração de 1,00 × 10- 5 a 1,08 × 10- 2 mol L- 1, com uma inclinação de ~ 40 mV / pF e foi estável suficiente para várias determinações. O método foi aplicado com sucesso na determinação de íons fluoreto em amostras comerciais farmacêuticas. Os resultados demonstraram que o sensor proposto pode ser utilizado como uma alternativa interessante aos métodos analíticos tradicionais para determinação de íons fluoreto.
Influência das condições de mistura e dos teores de Acetato de Vinila e de argila nas propriedades de nanocompósitos de EVA/montmorilonita organofílica
Authors: Queiroz Daiane Dias de , Souza Patrícia Moraes Sinohara , Bertucci Júlia Eulálio de Souza , Vieira Amanda de Freitas Mendes , Morales Ana Rita , Sarantopoulos Claire Isabel Grígoli de Luca
Published: July 2015

O copolímero Etileno Acetato de Vinila (EVA) é uma poliolefina utilizada principalmente em filmes para embalagens, onde a sua flexibilidade, tenacidade, elasticidade e transparência são atributos desejáveis. As propriedades mecânicas, térmicas e de barreira do EVA podem ser melhoradas pela incorporação de cargas inorgânicas. O EVA apresenta polaridade variável de acordo com o teor de Acetato de Vinila, o que promove a viabilidade para obtenção de nanocompósitos com argilas organicamente modificadas, tornando desnecessária a adição de agentes compatibilizantes. Neste trabalho foram preparados nanocompósitos de EVA e montmorilonita organofílica comercial pelo método de intercalação do fundido em um reômetro de torque, com rotores tipo roller, a 150°C durante 10minutos, com monitoramento do torque em função do tempo. A fim de investigar a influência da polaridade do EVA, da concentração da argila e das condições de processamento nas características dos nanocompósitos, variou-se a concentração de Acetato de Vinila (19% e 28%), o teor de argila (2% e 5%) e a velocidade de rotores (60 rpm e 100 rpm). Foram avaliadas a estrutura da argila, a estabilidade térmica e as propriedades mecânicas e de barreira dos nanocompósitos, mediante as técnicas de difração de raios X, análise termogravimétrica, ensaio de tração e análises de taxa de permeabilidade ao oxigênio e ao vapor d’água. A partir dos dados de permeabilidade foi aplicado o modelo de Nielsen para avaliar o grau de esfoliação da argila. Dentre os principais resultados com o planejamento fatorial destacam-se: (a) o aumento da polaridade do EVA aumentou a permeabilidade ao oxigênio e ao vapor d’água dos materiais; (b) o teor de argila não modificou a estabilidade térmica dos nanocompósitos e a estrutura da argila; (c) o aumento da concentração da argila aumentou o módulo elástico, reduziu a deformação de ruptura e reduziu significativamente o coeficiente de permeabilidade ao oxigênio e ao vapor d’água; (d) o fator rotação não implicou em alterações significativas em nenhuma das respostas avaliadas.
Utilização da técnica de birrefringência em reômetro multipasse para a diferenciação de grades de poliestireno cristal
Authors: Farias Thais M. , Secchi Argimiro R. , Butler Simon , Cardozo Nilo Sérgio M.
Published: July 2015

O entendimento de como as propriedades reológicas afetam o comportamento dos polímeros nas operações de processamento, por meio de diferentes técnicas experimentais, é de fundamental importância para ser possível prever e avaliar a estrutura final destes materiais. Neste contexto, o objetivo deste trabalho é aplicar a técnica de birrefringência para diferenciar dois grades de poliestireno cristal. Foram realizados experimentos em um reômetro multipasse que permitiram a aquisição de imagens de birrefringência, que representam o campo de tensão do escoamento, e obteve-se a queda de pressão durante os experimentos. Ao se compararem os padrões de birrefringência dos dois poliestirenos foi possível distinguir os materiais e verificar que o escoamento da amostra de maior massa molar é mais complexo, com maior birrefringência e tensão mais elevada. Os resultados obtidos, além de contribuírem para a caracterização reológica, podem ser empregados no estudo comparativo de modelos constitutivos e desenvolvimento de códigos computacionais.