bluuebunny/crossref_metadata_2025 huggingface dataset:
Noise Properties of Graphene-Polymer Thick-Film Resistors
Authors: Mleczko Krzysztof , Ptak Piotr , Zawiślak Zbigniew , Słoma Marcin , Jakubowska Małgorzata , Kolek Andrzej
Published: December 2017

Graphene is a very promising material for potential applications in many fields. Since manufacturing technologies of graphene are still at the developing stage, low-frequency noise measurements as a tool for evaluating their quality is proposed. In this work, noise properties of polymer thick-film resistors with graphene nano-platelets as a functional phase are reported. The measurements were carried out in room temperature. 1/f noise caused by resistance fluctuations has been found to be the main component in the specimens. The parameter values describing noise intensity of the polymer thick-film specimens have been calculated and compared with the values obtained for other thick-film resistors and layers used in microelectronics. The studied polymer thick-film specimens exhibit rather poor noise properties, especially for the layers with a low content of the functional phase.
Dynamic Signal Strength Mapping and Analysis by Means of Mobile Geographic Information System
Authors: Kulawiak Marcin , Wycinka Witold
Published: December 2017

Bluetooth beacons are becoming increasingly popular for various applications such as marketing or indoor navigation. However, designing a proper beacon installation requires knowledge of the possible sources of interference in the target environment. While theoretically beacon signal strength should decay linearly with log distance, on-site measurements usually reveal that noise from objects such as Wi-Fi networks operating in the vicinity significantly alters the expected signal range. The paper presents a novel mobile Geographic Information System for measurement, mapping and local as well as online storage of Bluetooth beacon signal strength in semireal time. For the purpose of on-site geovisual analysis of the signal, the application integrates a dedicated interpolation algorithm optimized for low-power devices. The paper discusses the performance and quality of the mapping algorithms in several different test environments.
Fast Second Order Original Prony’s Method for Embedded Measuring Systems
Authors: Zygarlicki Jarosław
Published: December 2017

The paper presents a method of adaptation of the original second order Prony’s method for applications in lowcost digital measurement systems with low computing performance. The presented method can be used in measuring systems where it is important to obtain in real time the values of amplitude, frequency, initial phase and damping coefficient of a single sinusoidal component of an analysed signal. The paper presents optimized, in terms of the number of mathematical operations, implementation of the method in selected embedded devices as well as the calculation times of the method for each platform.
Relationship between Ag nanoparticles and Ag ions prepared by arc discharge method
Authors: Tseng Kuo-Hsiung , Chou Chih-Ju , Liu To-Cheng , Tien Der-Chi , Chang Chun Yung , Stobinski Leszek
Published: December 2017

This study used the submerged arc discharge method (SADM) to produce metal fluid containing nanoparticles and submicron particles, whereby the energy focused by an electric arc was used to disintegrate silver (Ag) metal in deionized water (DW). No additional chemical substances were required throughout the process, which enabled production to be fast and straightforward. This study proposed using colorimetry to define the interrelation between concentration and nano Ag as well as the Ag ions (Ag+) within a nano silver colloid (NSC) of a specific dilution factor, involving ultraviolet-visible (UV-Vis) spectroscopy and the measuring of electrical conductivity. The results showed that Ag+ activity increased under various dilution conditions, displaying an upward trend in activity with an increase in the dilution factor. The absorption values of Ag+ and nanoparticles increased over time, and the Ag+ activity increased by up to a factor of two after its dilution. Therefore, the Ag+ and nanoparticles demonstrated an interdependence between each other.
The Analysis of Drive Systems in Unmanned Underwater Vehicles Towards Identifying the Method of Drive Transmission – Part 2
Authors: Jakus Bartłomiej , Olejnik Adam
Published: December 2017

This is the second part of material concerned with the analysis of drive systems in remotely controlled underwater vehicles. The first part involved the problem of classification of unmanned underwater vehicles, mainly remotely controlled, as well as the nomenclature used in relation to various components of the discussed drive systems and thrusters. The functionality of particular drive systems was discussed along with the advantages and disadvantages of the analysed design technologies. This material presents the method of conducting an analysis of drive systems, its methodology and results.
The Effects of Hyperbaric Exposure on Immediate and Delayed Changes in Core Temperature and Its Circadian Fluctuations
Authors: Kujawski Sławomir , Słomko Joanna , Zawadka-Kunikowska Monika , Kozakiewicz Mariusz , Klawe Jacek J. , Tafil-Klawe Małgorzata , Zalewski Paweł
Published: December 2017

Changes observed in the core body temperature of divers are the result of a multifaceted response from the body to the change of the external environment. In response to repeated activities, there may be a chronic, physiological adaptation of the body’s response system. This is observed in the physiology of experienced divers while diving. The purpose of this study is to determine the immediate and delayed effects of hyperbaric exposure on core temperature, as well as its circadian changes in a group of three experienced divers. During compression at 30 and 60 meters, deep body temperature values tended to increase. Subsequently, deep body temperature values showed a tendency to decrease during decompression. All differences in core temperature values obtained by the group of divers at individual time points in this study were not statistically significant.
The role of the World Bank and WHO Model Disability Survey in public health
Authors: Sabariego Carla
Published: December 2017

The Model Disability Survey (MDS) is the tool recommended by the world health organization (WHO) to collect data on disability at the population level. It consciously promotes a narrative of inclusion, as disability is understood as a continuum, ranging from low to high levels. Public health currently faces the challenge of responding to demographic and health shifts leading to an increase in disability in the population. The MDS provides the information needed to meet these challenges and develop targeted public health interventions.
Kann Inklusion im Sportverein Gesundheit fördern?
Authors: Meier Heiko , Seitz Simone
Published: December 2017

Inklusion wird im Zusammenhang mit Sportentwicklung aktuell vorwiegend unter normativen Gesichtspunkten als Recht auf Partizipation an allen Bereichen des Sports diskutiert. Dies impliziert den uneingeschränkten Zugang zu Vereinen, was mancherorts zu kontroversen Debatten führt. Inklusion kann für Sportvereine aber noch aus anderen Gründen bedeutsam sein; sie können lernen, heterogene Sportmotive in einer Gruppe zu organisieren, und damit einen Beitrag zur eigenen Zukunftssicherung und zur Gesundheitsversorgung der Bevölkerung leisten.
Belastungserleben von Lehrkräften durch schulische Inklusion
Authors: Peperkorn Milena , Horstmann David , Dadaczynski Kevin , Paulus Peter
Published: December 2017

Der Beitrag fokussiert auf Grundlage einer für Niedersachsen repräsentativen Befragung von n=8,167 Lehrkräften das wahrgenommene Belastungserleben im Zusammenhang mit schulischer Inklusion. Unter Anwendung der Dimensionen des Kohärenzgefühls zeigt sich eine hohe Sinnhaftigkeit inklusionsbezogener Tätigkeiten, aber eine geringe Bewältigbarkeit bezogen auf Planung und Unterricht. Der Zusammenhang zwischen wahrgenommener Belastung und Selbstwirksamkeitserwartungen erweist sich als signifikant.
Inklusion, Behinderung, Beeinträchtigung und Gesundheitsberichterstattung
Authors: Hornberg Claudia , Lätzsch Rebecca , Wattenberg Ivonne
Published: December 2017

Der Beitrag befasst sich mit der Berichterstattung zur Teilhabe von Menschen mit Behinderungen in Deutschland. Hierbei wird auf die vorhandenen Daten zur gesundheitlichen Lage und Versorgung von Menschen mit Behinderungen und Beeinträchtigungen fokussiert. Weitergehend werden Erfordernisse der zukünftigen Berichterstattung aufgezeigt.
On Garbage and Ice: Ethics of the Slums in Katherine Boo’s Behind the Beautiful Forevers
Authors: Rogobete Daniela
Published: December 2017

The present paper dwells on the complex representation of the Indian slums in Katherine Boo’s 2012 novel Behind the Beautiful Forevers. Leaving behind the conventional oversentimentalised and over-optimistic literary and cinematographic depictions, the writer places her text on the boundary between fiction and journalism, discussing poverty, inequality, hope and despair in one of the most surprising cities of the globalised world, from a new perspective.
Thematic Composition and Idiom Variation
Authors: Cserép Attila
Published: December 2017

The Corpus of Contemporary American English (COCA) has been studied to retrieve variant forms of semantically decomposable idioms that have no thematic composition for the purpose of determining whether thematic composition is a necessary criterion for idiom variation as claimed by Horn (2003). The syntactic variants searched for include passive, raising, tough-movement, relative clauses and wh-questions. Horn’s (2003) hypothesis is not fully confirmed, as some variation has been found.
Metaphors of Sadness in Quotations
Authors: Csillag Andrea
Published: December 2017

The paper studies metaphors used in common people’s passages about sadness on the internet site www.searchquotes.com/search/Sadness. The paper also investigates which sadness metaphors listed in Kövecses (2000) and Esenova (2011) are applied in sadness quotations on the site and finds only a small number of them. However, the quotations instantiate a number of other metaphors not listed by the two authors. The difference may be explained by the fact that linguistic expressions in Kövecses’s and Esenova’s corpora describe what people feel when they say they are sad, whereas sadness quotations present what people understand by the concept of sadness.
Corpus-Based Training to Build Translation Competences and Translators’ Self-Reliance
Authors: Oțăt Diana
Published: December 2017

Among well-established standard operating strategies and methodologies aimed at improving students’ multi-layered translation competence, corpus linguistics has given impulse to new interdisciplinary standpoints. Plugging in cutting edge toolkits, corpus use envisages real-life translation training in compliance with current market demands. The paper underpins specialised corpus design, using MAXQDA as an interactive tool meant to build translators’ functional autonomy.
Quality Assurance in Translation. A Process-Oriented Approach
Authors: Vîlceanu Titela
Published: December 2017

The paper underpins a process-oriented approach to translation with a view to quality assurance at the internal level, i.e. raising translation trainees’ awareness of the recurrent problems associated with referential, grammatical and lexical accuracy and, last but not least, compliance with stylistic conventions (text/discourse specificities, pragmatic use, etc.). Therefore, we advocate feedforwarding instead of feedback, acting prospectively rather than retrospectively.
Current Account Balance and Export Performances: Evidence Based on New EU Countries
Authors: Bogdan Željko , Cota Boris , Erjavec Nataša
Published: December 2017

In this paper, we investigate whether the differences in the current account balance and export performances for a new EU countries are a result of exchange rate policies. The analysis shows that countries with a flexible exchange rate have better export performances and the current account balance in the pre-crisis period. The obtained results show that movements in the current account balance are mainly driven by domestic variables. In the countries with a flexible exchange rate, real and nominal depreciation affects export positively although the magnitude of these effects is tiny and limited to the crisis period. These results point to a higher significance of non-price competitiveness on export which should be a future research topic.
Legendre Wavelet Modified Petrov–Galerkin Method in Two-Dimensional Moving Boundary Problem
Authors: Yadav S. , Upadhyay S. , Rai K.N.
Published: December 2017

In this study, we developed the two-dimensional Legendre wavelet modified Petrov–Galerkin method for solving the two-dimensional moving boundary problem arising during melting of solid whose one surface is kept under most generalised boundary condition, and other two surfaces are insulated. The particular cases when surface subjected to the boundary condition of first, second and third kinds are discussed in detail. For validity of the present method, we have plotted graphs between residual (obtained from the original differential equation and its associated boundary conditions) and x-axis and found the effect of an error on moving layer thickness and y coordinate, respectively. Furthermore, we proved the convergence analysis of present method. The effect of parameters (Predvoditelev number, Kirpichev number, Biot number) on the moving layer thickness is discussed in detail. The whole analysis is presented in a dimensionless form.
Ancient Rome mapped
Authors: Frischer Bernard
Published: December 2017

When I first began my teaching career in 1976 at the University of California, Los Angeles, the subject of Roman topography was difficult to teach to English-speaking students. Most of the scholarship was written in Italian, and much of the rest was in French and German. Over the past 40 years the situation has changed significantly. We now have two useful introductory surveys in English: Coarelli'sRome and environs(2014) and Claridge'sRome: an Oxford archaeological guide(2010). We also have a host of monographic studies and, since 1988, innumerable articles and book reviews in theJournal of Roman Archaeology. Richardson's (1992)A new topographical dictionary of ancient Romeupdated the one venerable but antiquated English reference work that we had long had: Platner and Ashby's (1926)A topographical dictionary of ancient Rome. Meanwhile, at least for polyglot scholars, the situation became even more favourable with the appearance of Steinby's (1992–2001)Lexicon Topographicum Urbis Romae(LTUR), a collaborative work by a distinguished international team writing in Italian, French, German and English, with around 2300 individual entries on specific sites and monuments of the ancient city.
New Book Chronicle
Authors: Witcher Robert
Published: December 2017

At the end ofAntiquity’s ninetieth year, this issue of NBC looks at a selection of new books through the eyes ofAntiquity’s founder: O.G.S. Crawford. He died exactly 60 years ago, but were he to be resurrected in 2017, what would he make of archaeology today? What would be familiar? And what developments would surprise him? He would undoubtedly scourAntiquityto bring himself up to date, but he might also turn to some introductory texts for a panorama of the modern archaeological landscape; he would have plenty to choose from.
EDITORIAL
Authors: Scarre Chris
Published: December 2017

One of the recurrent patterns in the Eurasian past is the tension between the steppe and the sown—between the nomadic peoples occupying the grassland belt from the Ukraine to China, and the settled farmers living along their southern margins. Peoples of the steppe have featured regularly in recent issues of Antiquity: the bronze-working traditions of the eastern steppes (Hsu et al. 2016)1, Andronovo settlement in Xinjiang (Jia et al. 2017)2, the Yamnaya people of the western steppes (Heyd 2017; Kristiansen 2017)3,4, or animal husbandry in the southern oases (Lhuillier et al. 2017)5. The more nomadic the lifestyle, the fewer the archaeological traces one might expect to find; but for some steppe peoples, those traces are nonetheless spectacular. And for none is that truer than for the Scythians, subject of the current major exhibition at the British Museum.
A Novel Color Analysis Technique for Differentiation of Mix Grass Cover under Shade and without Shade in Green Infrastructures
Authors: Gadi Vinay Kumar , Manogaran Indu Priya , Garg Ankit , Berretta Christian , Sreedeep Sekharan
Published: December 2017

Color analysis was found to be a low-cost and noninvasive technique to distinguish plant and soil, crop and weed, living and dead plant, diseased and healthy leaves, and human and plant in field and automatic seedling transplantation systems. However, color analysis was rarely utilized to differentiate various types of shade by grass cover. The main objective of this study was to quantify and differentiate mix grass cover under shade and light in a green infrastructure. The spatial heterogeneity of mix grass species in the selected site was categorized into three different portions, i.e., (1) mix grass cover under tree shade (MUT); (2) mix grass cover under self-shade (MUS); and (3) mix grass cover without shade (MWS). Field monitoring was conducted for about six months to validate the color analysis technique. A java-based image analysis tool, ImageJ, was used for color analysis. Lab color space was adopted for the present study, which identifies the spatial heterogeneity of mix grass cover based on lightness variation of green color. L describes lightness, and a and b represent the color opponents green–red and blue–yellow. ImageJ categorizes L, a, and b using 256 segments on a scale varying between 0 and 255. The range of L values for MUT, MUS, and MWS were found to lie within 20–91, 92–162, and 162–233, respectively. Ranges of a and b values were found to be 0–134 and 154–255, respectively, for the three categories of mix grass. Proportions of MUT, MUS, and MWS were found to vary within 0.2–3.0 %, 0–53 %, and 12–49 %, respectively. Variation in MUT and MWS proportions was found to be consistent with change in rainfall depth during the dry period. However, MUT and MWS were found to change with respect to shoot growth rate during the wet period. The MUS proportion variation trend was not found to be consistent with rainfall depth or shoot growth during the wet period.
Mechanical Properties and Microstructure of Starch and Sisal Fiber Biocomposite Modified with Epoxy Resin
Authors: Verma Akarsh , Gaur Amit , Singh V. K.
Published: December 2017

In this experimental analysis, fabrication and characterization of biocomposites derived from starch-glycerol resin and sisal fiber have been done using the wet hand lay-up technique. Fibers having different weight percentage and 2–3-mm length have been taken for the investigation. The surface of fibers was treated with sodium hydroxide (NaOH) to improve the interphase bonding. The mechanical tests of composites were investigated in accordance with ASTM standards. Various other tests that were conducted include water absorption, thermal analysis, and scanning electron microscopy (SEM). The main drawback of natural composite is its poor water absorption property, which has been checked here by the epoxy coating. The results of the tests reveal a significant improvement in overall properties of biocomposite when compared with the neat starch matrix.
Multi-stakeholder initiatives in sustainable supply chains: Putting sustainability performance in context
Authors: Searcy Cory
Published: December 2017

The purpose of this article is to explore the role of multi-stakeholder initiatives (MSIs) in sustainable supply chains. I argue that MSIs are needed to help establish and institutionalize the natural and social thresholds in which a sustainable supply chain must operate. While a multitude of MSIs relevant to supply chains already exist, they do not yet adequately address sustainability thresholds. Building on theory and literature, I elaborate on four interrelated roles for MSIs in this area: (1) providing learning platforms, (2) developing standards, (3) developing enforcement mechanisms, and (4) issuing labels and certifications. All four roles emphasize the need for supply chains to operate within the thresholds set by nature and society. Staying within thresholds is what distinguishes between sustainable and unsustainable supply chains. The four roles form part of a broader conceptual framework outlining a way forward for MSIs in sustainable supply chains. Different MSIs could address one or more of these roles. I argue that all MSIs must be developed with special attention to their input and output legitimacy. Stakeholders from both within and beyond the supply chain must be involved in developing and implementing a MSI for it to be viewed as legitimate. I note that the conceptual framework presented here is a starting point. It would benefit from further testing and refinement. For example, future work could add further specificity to the four roles I discuss. Future research could also focus on integrating economic thresholds for sustainable supply chains into the framework.
Triangulating Blackness
Authors: Nemser Daniel
Published: December 2017

On May 2, 1612, Mexico City’s authorities executed thirty-five Black people who had allegedly “conspired” against the colonial order. This article compares two accounts of the supposed plot, one written in Spanish by an anonymous member of the Audiencia, the other in Nahuatl by the indigenous historian Domingo de Chimalpahin. The former narrates the “conspiracy” by representing the Black body as incapable of self-mastery and thus predisposed to raping Spanish women. In contrast, the latter proceeds through triangulation, offering a critical reflection on the Spanish account and the racialization process. This analysis highlights the limits of existing translations of the original Nahuatl text, which unintentionally reproduce the colonial myth of the Black rapist.

El 2 de mayo de 1612 las autoridades de la ciudad de México ejecutaron a 35 negros que supuestamente habían “conspirado” contra el orden colonial. Este ensayo compara dos relaciones del supuesto complot, una escrita en español por un miembro anónimo de la Audiencia, y la otra en náhuatl por el historiador indígena Domingo de Chimalpahin. La primera narra la “conspiración” representando al cuerpo negro como incapaz de autocontrol y, por lo tanto, predispuesto a violar a las mujeres españolas. En contraste, la segunda se vale a la triangulación, proponiendo una reflexión crítica sobre la narrativa española y el proceso de la racialización. Este análisis subraya los límites de las traducciones existentes del náhuatl original, que sin querer reproducen el mito colonial del violador negro.
Optimizing Genomic Methods for Mapping and Identification of Candidate Variants in ENU Mutagenesis Screens Using Inbred Mice
Authors: Geister Krista A , Timms Andrew E , Beier David R
Published: December 2017

Positional cloning of ENU-induced mutations has traditionally relied on analysis of polymorphic variation between two strains. In contrast, the application of whole-genome sequencing (WGS) has enabled gene discovery in mutant lines maintained on an inbred genetic background. This approach utilizes genetic variation derived from ENU-induced variants for mapping and reduces the likelihood of phenotypic variation, making it an ideal method for genetic modifier screening. Here, we describe the results of such a screen, wherein we determined the minimal number of mutant genomic DNA samples to include in our analyses and improved the sensitivity of our screen by individually barcoding each genomic DNA library. We present several unique cases to illustrate this approach’s efficacy, including the discovery of two distinct mutations that generate essentially identical mutant phenotypes, the ascertainment of a non-ENU-induced candidate variant through homozygosity mapping, and an approach for the identification of putative dominant genetic modifiers.
Facing the Nation and the University: A Model for Institutional Transformation
Authors: Leiva Priscilla
Published: December 2017

This essay responds to Sánchez’s invitation to start in a specific place to consider a larger story in order to describe his impact as both a scholar and an institution builder. This essay will do so by putting two of his pieces in conversation: “Face the Nation,” which offers new conceptual frameworks to understand a multiracial society, and “Crossing Figueroa: The Tangled Web of Diversity and Democracy,” in which he theorizes the role of the university and the struggle for democracy both inside and outside its walls. By reading these two pieces together, scholars of racial formation may gain insight regarding three critical interventions that the field now takes for granted. First, multiracial interaction is regularly a research topic that complicates binaries of Black and white because Sánchez, his colleagues, and his predecessors began asking different questions about race. His students have been central to pushing the edges of the field, proving that good mentorship is more than generosity. Second, the fact that Sánchez, a preeminent historian, engages multiple fields in theorizing multiracial interaction demonstrates the political urgency of reading and writing beyond the discipline. Lastly, Sánchez’s efforts to diversify university faculty and create conditions of success for faculty of color is central to making the university live up to its promises of civic responsibility and democracy. Ultimately, his body of work both on and off the page demonstrates his importance in bringing different worlds, disciplines, and individuals together.
What’s Good for George Sánchez Is Good for Boyle Heights: Regenerative Scholarship, Urban Racism, Gentrification, and East LA Interchange
Authors: Estrada Gilbert
Published: December 2017

The inclusive ideals of George Sánchez have helped shape a new generation of academics who have promoted connections with nonacademic organizations. This article discusses how Sánchez has continued these efforts through his pivotal contributions to an award-winning documentary focusing on the multiethnic, working-class community of Boyle Heights: Betsy Kalin’s film East LA Interchange (2015). East LA Interchange’s greatest contribution to the generative scholarship Sánchez emphasizes is its critical analysis of modern urban problems, utilizing history as a tool for social change. The story of Boyle Heights is not just a history of a single working-class community with a diverse culture. It is also a tale of a neighborhood trying to solve real world problems such as gentrification, unaffordable housing, community displacement, and urban pollution. The film portrays these difficulties in the present while showing that they originated decades ago. Sánchez and East LA Interchange are at their best when they provide the historical contexts of contemporary problems, emphasizing that history is not only the study of the past. Rather, history is the unending dialogue between the past, present, and future, and any significant discourse on today’s urban ills must be rooted in the past. For students and others interested in the diverse communities common in many US metropolitan regions, East LA Interchange has much to offer regarding the issues of immigration, redlining, deed restrictions, political activism, freeway construction, living with racially and ethnically diverse community members, and the nationwide problem of gentrification. These themes, especially gentrification, are the primary focus of this article.
“Coyote Hustle”: Agonistic Harmony and Transformation
Authors: Gonzalez Martha
Published: December 2017

As a Chicana musician who has produced music mostly for public consumption, I find it encouraging when audiences contemplate the messages or ideas behind the music and move toward critical action. For over twenty-one years, songs from my band, Quetzal, have been used as educational tools across and beyond grade levels, institutions, and community organizations. This essay explores efforts involving two of our songs. The first composition, “Estoy Aquí,” is from our Grammy Award–winning album Imaginaries, released in 2012. The second, “Coyote Hustle,” was independently released on the Quetzanimales album in 2014 on Artivist Entertainment. In both cases the community undertook the theory embedded in the songs, and their exploration of the ideas eventually led to critical action. After some thought and discussion with others, I discovered that both examples induced a community process that I identify here as “agonistic harmony,” ultimately leading to transformation.
Seizing the Moment: Learning from Humanely Relational and Interdisciplinary Soundscapes
Authors: Rosas Ana Elizabeth
Published: December 2017

Lessons learned from George Sánchez have been at the heart of the work I do with undergraduate students at the University of California, Irvine (UCI). Many of them face enormous stress as a result of being (or being related to) undocumented Latina/o immigrants in the United States. During the 2011 Winter quarter, several of those students conferred with me about their intention to invite fellow UCI undergraduate students enrolled in our “Histories of the U.S.-Mexico Borderlands” course to join UCI Dreamers. This is an undergraduate student group that supports undocumented immigrant students at our campus as they struggle to finance, complete, and derive full social and intellectual benefit from their undergraduate education. This initiative situated our Chicana/o history course as a productive common ground, a space for this generation of women and men to act in support of each other. Attending UCI Dreamers meetings was not an automatic or random decision but rather the outcome of a series of interactions, discussions, and experiences. Prominent among these was our consideration of music and musical soundscapes that have influenced how life in the US–Mexico borderlands is lived and discussed.
Análise de Dados de Falha de um Transmissor de Fibra Óptica
Authors: Silva Evaldo Da Conceição , Ferreira Gabriel De Souza , De Medeiros Santos Maicon Mateus , De Resende Andrade Paulo César , Gonçalves Rosa Renan Martinielli
Published: December 2017

A análise de confiabilidade é uma metodologia utilizada para descrever o comportamento de falhas em equipamentos. O presente trabalho tem por objetivo modelar o tempo de vida de transmissores de fibra óptica. O procedimento de pesquisa utilizado foi o estudo de caso. Foram feitos testes em 14 equipamentos que falharam. O método gráfico e os testes de aderência de qui-quadrado e Kolmogorov-Smirnov (K-S) foram utilizados para verificar a distribuição que melhor modela a amostra de dados. Foi utilizado o software ProConf para fazer a análise. Os parâmetros da distribuição foram determinados. As funções de confiabilidade R(t) e de risco h(t) foram apresentadas. A distribuição Weibull foi escolhida para modelar o tempo até a falha dos dados. O tempo médio até a falha dos transmissores é de 318 horas. Metade dos equipamentos falharam antes de 236 horas. Os fatores de forma e escala da Weibull são, respectivamente, 1,47 e 357,50. A fase de vida dos transmissores de fibra óptica estudados corresponde ao início da mortalidade senil, já que o γ foi maior que1. Assim, tem-se risco crescente e confiabilidade decrescente, indicando um desgaste do equipamento.
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Authors: Photo Essay Extended
Published: December 2017

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A Calling to Professionalism
Authors: Herron Patrick
Published: December 2017

This article was migrated. The article was marked as recommended. The editor for this theme issue on Accessing Medical Education has asked authors to reflect on how they came to be the medical education professional they are today. My own pathway was non-traditional to say the least. Some professions are sought out and others come about through serendipitous moments and opportunities. My own journey has contributed to my current scholarly focus on professionalism in health care.
Situational judgement tests: important clarifications regarding the methodology
Authors: Beesley Rebecca , Sharma Angelica , Walsh Jason Leo , Harris Benjamin Howell Lole , Wilson David John
Published: December 2017

This article was migrated. The article was marked as recommended.
Study on Maize Stalk Lodging Resistance in Cyclic Cross Selection
Authors: ONA Andreea , MUNTEAN Leon , HAȘ Voichița , TRITEAN Nicolae
Published: December 2017

Stalk lodging resistance is a particularly important trait on maize, especially in terms of mechanized harvesting of the crop. Stalk lodging represents a major problem of corn with yield losses. Because of this reason, it takes a special attention on the breeding process. The purpose of this research was the study of maize stalk lodging resistance before the harvest time and finding the best breeding lines for this type of resistance. We used 7 breeding lines (TE 229, TE 202B, TA 452, TE 330A, TD 364, TE 317 and TE 335) as maternal lines and another 3 (TD 268, TC 385A and TC 399) as testers. Lines were tested in 2011 and 2012, in compared cultures with 24 variants, where 21 of them were the experimental hybrids between tested lines and testers and the other 3 werethe control hybrids Turda 201, Turda Favorit and PR39D81. Variance analysis was performed according to the classical model of a two-factor system. Genic effects were calculated after 2nd North Carolina model. Regarding the results, the highest percentage of unbroken plants was on TD 268 tester (80.7%) and the lowest on TD 364 tested line (70.2%). Tested lines that was noted for the general combining ability of lodging resistance were TA 452 and TE 335. Crossings that marked high values for non-additive effects were TA 452 x TC 385A, TE 202B x TC 399 and TE 202B x TD 268. Effects values for general combining ability were between -4.72% and +4.49% on tested lines, -1.68% and +5.78% on testers; effects values for specific combining ability were between -11.25% and +7.58%. Regarding the tested lines was noted TA 452 inbred line and regarding the testers was noted TD 268 inbred line. On this issue, we can state that in the selection process of maize hybrids must be chosen only those hybrid combinations with stalk-lodging resistance because of the similar contribution of additive and non-additive genic effects to resistant genotypes.
The Suitability and the Bio-chemical Characteristics of Soils from the Northwest Region of Development from Romania, for Blueberry Crop
Authors: BOȚ Amalia Ioana , PĂCURAR Ioan , SZAJDAK Lech , ROȘCA Sanda
Published: December 2017

We conducted several bio-chemical analyses on soil samples collected from eight blueberry plantations from Northwest Region of Development, using such as Kjeldahl method for total N, Perucci, Krawczyński, Hoffman and Teicher methodology for determine soil enzyme. The bio-chemical analyses conducted provide a better qualitative characterization of soils, providing significant information regarding their fertility degree and favourability for blueberries. For instance, the higher amount of total organic carbon found in four of the eight studied plantation, can be correlated with the same higher amount of enzyme present in soil which have an influence on them, xanthine oxidase and peroxidase activity. Taking into account the requirements needed for a blueberry plantation, we demonstrate that organic soils have also had the highest amount of bio-chemical compounds, such as cambisoil, met in Galații Bistriței, where were also found the highest amounts of different forms of nitrogen (1.755 g/kg total N; 0.0189 g/kg NH4 + and 0.0231g/kg NO3 in Galații Bistriței, comparing to 1.344 g/kg of total nitrogen; 0.0126 g/kg NH4+ and 0.0119 g/kg NO3- in Ulmeni), different forms of carbon and the enzymes that influence this compounds in soil, xanthine oxidase activity, peroxidase activity and nitrate reductase activity.
Using Apple (Malus domestica), Pumpkin (Cucurbita maxima) and Cinnamon (Cinnamom vertum) to Obtain an Innovative Jam-Like Food Product
Authors: IANCU Maria Lidia
Published: December 2017

The apple, the pumpkin and the cinnamon are raw materials that could be innovatively combined to produce a new sugar-preserved product following an original recipe. It can be considered in accordance with the European quality of jam-type varieties. It is a hybrid product, a component of “the European gastronomy” with old Bavarian roots and Romanian raw material. An adapted technological scheme and a recipe based on the TSS of the raw material and of the finished product were used. The quality indicators were determined using analytical methods. The PCA with the results provided by the panelists were used for the study of the aromatic profile. An identification of flavors, such as apple and cinnamon, is reported, which contributes to the specificity of the sensory profile of the jam. The new product has: TSS = 63.6 oBrix, TA = 0.2%, VA = 0.105 %. These values fall within the range of values for other jam and experimental jam assortments. The proportion of solids is 34%, which is far too low compared to the 45% minimum accepted limit. Taking into account that there is no “surface lifting” flaw, it is recommended to accept the value for the new assortment.
The Starter Effect of Non-Symbiotic Microbial Bioproducts on Wheat
Authors: VIDICAN Roxana , STOIAN Vlad , ROTAR Ioan , PĂCURAR Florin
Published: December 2017

Microbial groups developed in the rhizosphere ensure the stability and dynamics of nutrient transfer processes to plants. Additional soil inoculation with rhizospheric bacteria acts to expand the ecological niche, supplements the activity, the number of individuals and promote plant growth. In today’s agriculture, there is a need for the usage of rhizosphere microflora and integrative approaches to stimulate plant growth. The aim of the study is to evaluate the use of biofertilizers as starter stimulators in autumn wheat. Different concentrations of Bactofil, containing rhizospheric bacteria, were applied in small rhizothrones. Evaluation of relationships between bacterial inoculum and plant reveals the degree of applicability and adaptation to the soil conditions of exogenous microflora. Doses of 15.6 x 108 and 20.8 x 108 cells/m2 stimulates the root elongation and higher level of mycorrhization. Bioproducts can be viable solutions to stimulate the initial development of wheat plants.
Studies Regarding Treatments of Led-s Emitted Light on Sprouting Fagopyrum Esculentum Moench
Authors: LIVADARIU Oana , MAXIMILIAN Carmen
Published: December 2017

The present study presents the influence exercised by LED (light emitting diodes)-s emitted white (W), red (R), blue (B) light on sprouting of buckwheat seeds and evaluated the effects on content of phenolic compounds, antioxidant capacity and flavonoids.The fresh weight of hypocotyls, showed that the R light has generated the best influence for sprouts and W light has generated the most adverse influence. The content of flavonoids was stimulated by R LED for variant sprouts with testa (V3), while both B and R LED inhibited for variant without testa (V4, V6). The higher concentration of polyphenols was obtained for V5 variant illuminated with B LED and increased for V4 variant illuminated with R LED. The antioxidant capacity was higher for V3 variant illuminated with B light and stimulated by R LED in V4 variant.The results contribute to the establishment an efficient working protocol, for obtaining sprouts from buckwheat seeds, with a comprehensive content of bioactive components, various nutrients by applying the R LED treatment.
Growth Performance and Food Conversion Efficiency of Juvenile Russian Sturgeon at Different Feeding Frequencies
Authors: ANDREI(GURIENCU) Raluca Cristina , CRISTEA Victor , DEDIU Lorena , CREȚU Mirela , DOCAN Angelica
Published: December 2017

The effects of different feeding frequencies (one, two, three and four meals per day) on growth performance and feed conversion efficiency of Russian sturgeon juveniles (Acipenser gueldenstaedtii) was studied over a period of 45 days. The experiment took place in a recirculating aquaculture system provided with eight rearing units. 160 Russian sturgeon juveniles with an initial weight of 349.81±34.56 g, were randomly distributed, in order to create four experimental variants in duplicate. At the end of the experiment all fish were weight and measured and the growth parameters were calculated. The results indicated that fish fed twice and once per day had the highest growth performance compared to fish feed with three and four meals/day. It was concluded that choosing a feeding frequency of two meals per day is much more sustainable in terms of economic costs.
Morphometric Characteristics and Length-Weight Relationship of Russian Sturgeon Juveniles Fed with Different Ratio
Authors: ANDREI(GURIENCU) Raluca Cristina , CRISTEA Victor , DEDIU Lorena , CREȚU Mirela , DOCAN Angelica Ionelia
Published: December 2017

The aim of this paper was to analyze some morphometric characteristics and the correlation between them for Russian sturgeon juveniles (Acipenser gueldenstaedtii) reared in a recirculating aquaculture system fed at different fed with different ratio: 1% body weight (BW), 1.5% BW, 2% BW and ad libitum feeding (which was around 2.8% BW).Fish, with an average body mass around 248.194 ± 1.59 g. Following biometric measurements were made for each fish, including weight (W), total length (TL), standard length (SL), fork length (FL), maximum body depth (last depth of caudal peduncle, H); preanal distance (AD), predorsal distance (PD), length of head (C), preorbital distance (PO), length of pectoral fin (LPF), interorbital distance (ID), maximum width of head (MH), width of mouth (WM), width of the head at the level of the mouth (WHM). The obtained results showed significant differences between all morphometric measurements (p<0.05) for all the experimental variants, emphasizing that in the ad libitum feeding all morphometric measurements were significantly higher than in the other experimental variants. In order to highlight more eloquent these differences, were developed some linear regressions between the morphometric measurements and significant positive correlation (p<0.05) between dependent and independent variables were found.
Propagation of Drosera rotundifolia and Drosera capensis in an in vitro Culture System
Authors: MICLEA Ileana , ZĂHAN Marius
Published: December 2017

Drosera rotundifolia and Drosera capensis (Droseraceae) are carnivorous plants grown as ornamentals and sources for homeopathic medicine. The aim of this study was to optimize nutrient and growth regulator concentrations for the in vitro propagation of these species. Half strength MS medium (1/2MS) was supplemented with kinetin (0.5, 2, 5 mg/l) or 6-benzyladenine (3, 5 mg/l) and plantlets were transferred to 1/2MS with or without cytokinins. After 8 weeks rosette diameter, plant height, number of roots, root length were recorded and plants were cultured in full strength MS, 1/2MS or 1/2MS with 0.5 mg/l α-naphthaleneacetic acid for the same period of time. Afterwards, plant characteristics (number of roots, root length, number of shoots, number of flower stalks) were assessed. For D. rotundifolia, shoot development and rosette diameter increased significantly in the medium with 0.5 mg/l kinetin and 3 mg/l 6-benzyladenine, while root development decreased. Plant growth regulator free medium was more suitable for root development than medium with α-naphthaleneacetic acid and thus supported the formation of significantly more flower stalks. For D. capensis, kinetin was detrimental for shoot development, the optimum medium for both shoot and root formation being MS without plant growth regulators.
The Effect of Saline Solution Used as an Activating Factor of the Semen in Brown Trout, Salmo Trutta Fario (Linnaeus 1758)
Authors: UIUIU Paul , COCAN Daniel I. , LAŢIU Călin , PĂPUC Tudor , POPESCU Florentina , CONSTANTINESCU Radu , COROIAN Cristian O. , IHUȚ Andrada , MIREŞAN Vioara
Published: December 2017

In this research we analysed the phenotypic characterization of Salmo trutta fario species and we studied the effect of the saline solution used as an activator for seminal material. The spermatozoa mobility ratio in our study ranged from 60% to 95%, with an average of 74% when using water and 84.5% when a saline solution (NaCl) of 7‰ was used. The average mobility time ranges between 58.7 seconds (water) and 99 seconds (saline solution). Biochemical analyses of seminal plasma were performed and parameters such as ions concentration (Na+ , K+ , Ca2+ , Mg2+ , Cl- ), protein profile (BUN, TP), lipid profile (TG, Chol) and enzyme profile (ALP) were followed. As a result of our research on semen in brown trout, we noticed that saline solution (7‰) compared to water when used as an activator of seminal material, is more effective in activating spermatozoa.
Morphological Traits of Brown Trout (Salmo Trutta Fario) from Fiad Trout Farm, Bistrița-Năsăud County
Authors: UIUIU Paul , LAŢIU Călin , POPESCU Florentina , CONSTANTINESCU Radu , COROIAN Cristian O. , IHUȚ Andrada , COCAN Daniel I. , MIREŞAN Vioara
Published: December 2017

The purpose of this this study was to complete the data from the specialized literature regarding some morphological charactersof male and female breeders of brown trout (Salmo trutta fario), exploited in Fiad trout farm, Bistrița-Năsăud County, Romania. The body mass (Bm) of males ranged from 0.67 kg to 1.39 kg with a mean value of 0.96 ±0.07 kg. The body mass of females (Bm) ranged from 0.50 kg to 0.90 kg with a mean value of 0.73±0.04 kg. In terms of descriptive statistics, the values of variability of studied characters, both males and females, are low. This low variability, shows the existence of a good homogeneity of the breeding group from Fiad trout farm.The One-Way ANOVA analysis showed that there is no statistically significance difference for the means of studied characters, except for commercial length and small perimeter of fishes. The results of t-test for showed that there is a statistically significance difference between the measurements and the gender of the specimens.
Research on the Effect of Diferential Organic Fertilization of Cauliflower Hybrids Grown in Open Field
Authors: APAHIDEAN Alexandru Ioan , HOZA Gheorghiţa , DINU Maria
Published: December 2017

Use of manufactured fertilizers has been increasingly incorporated into regular farming practice in EU since its introduction in mid to late nineteenth century. In 2014, mineral fertilizer consumption in EU was 18 million tons. Given intensive use of fertilizers and pesticides, horticulture and vegetable growing are considered to be major contributors to some existing environmental impacts, such as water and soil pollution. Therefore farmers need to be aware and use only necessary amount of fertilizer for good plant development and to obtain high productions and to move from classical fertilization to organic fertilization. Cauliflower is not a pretentious culture but applying fertilizers can have a beneficial effect on production. Experience was carried out in 2016 in Apahida village, near Cluj-Napoca. It followed the effects of differentiated organic fertilization on three cauliflower hybrids: ‘Casper’ F1, ‘Cercy’ F1and ‘Charlot’ F1. Experiment was carried out in open field and was started with seedlings. Experimental factors were: hybrid and number of fertilizations. Each experimental factor had three graduations which combined resulted in a number of nine variants. During vegetation period, growth measurements were made and also the specific technology for autumn grown cauliflower in open field was applied.