bluuebunny/crossref_metadata_2025 huggingface dataset:
A combined statistical bias correction and stochastic downscaling method for precipitation
Authors: Volosciuk Claudia , Maraun Douglas , Vrac Mathieu , Widmann Martin
Published: March 2017

Abstract. Much of our knowledge about future changes in precipitation relies on global (GCMs) and/or regional climate models (RCMs) that have resolutions which are much coarser than typical spatial scales of precipitation, particularly extremes. The major problems with these projections are both climate model biases and the gap between gridbox and point scale. Wong et al. (2014) developed a model to jointly bias correct and downscale precipitation at daily scales. This approach, however, relied on pairwise correspondence between predictor and predictand for calibration, and, thus, on nudged simulations which are rarely available. Here we present an extension of this approach that separates the downscaling from the bias correction and in principle is applicable to free-running GCMs/RCMs. In a first step, we bias correct RCM-simulated precipitation against gridded observations at the same scale using a parametric quantile mapping (QMgrid) approach. In a second step, we bridge the scale gap: we predict local variance employing a regression-based model with coarse-scale precipitation as a predictor. The regression model is calibrated between gridded and point-scale (station) observations. For this concept we present one specific implementation, although the optimal model may differ for each studied location. To correct the whole distribution including extreme tails we apply a mixture distribution of a gamma distribution for the precipitation mass and a generalized Pareto distribution for the extreme tail in the first step. For the second step a vector generalized linear gamma model is employed. For evaluation we adopt the perfect predictor experimental setup of VALUE. We also compare our method to the classical QM as it is usually applied, i.e., between RCM and point scale (QMpoint). Precipitation is in most cases improved by (parts of) our method across different European climates. The method generally performs better in summer than in winter and in winter best in the Mediterranean region, with a mild winter climate, and worst for continental winter climate in Mid- and eastern Europe or Scandinavia. While QMpoint performs similarly (better for continental winter) to our combined method in reducing the bias and representing heavy precipitation, it is not capable of correctly modeling point-scale spatial dependence of summer precipitation. A strength of this two-step method is that the best combination of bias correction and downscaling methods can be selected. This implies that the concept can be extended to a wide range of method combinations.
Landslides, floods and sinkholes in a karst environment: the 1–6 September 2014 Gargano event, southern Italy
Authors: Martinotti Maria Elena , Pisano Luca , Marchesini Ivan , Rossi Mauro , Peruccacci Silvia , Brunetti Maria Teresa , Melillo Massimo , Amoruso Giuseppe , Loiacono Pierluigi , Vennari Carmela , Vessia Giovanna , Trabace Maria , Parise Mario , Guzzetti Fausto
Published: March 2017

Abstract. In karst environments, heavy rainfall is known to cause multiple geohydrological hazards, including inundations, flash floods, landslides and sinkholes. We studied a period of intense rainfall from 1 to 6 September 2014 in the Gargano Promontory, a karst area in Puglia, southern Italy. In the period, a sequence of torrential rainfall events caused severe damage and claimed two fatalities. The amount and accuracy of the geographical and temporal information varied for the different hazards. The temporal information was most accurate for the inundation caused by a major river, less accurate for flash floods caused by minor torrents and even less accurate for landslides. For sinkholes, only generic information on the period of occurrence of the failures was available. Our analysis revealed that in the promontory, rainfall-driven hazards occurred in response to extreme meteorological conditions and that the karst landscape responded to the torrential rainfall with a threshold behaviour. We exploited the rainfall and the landslide information to design the new ensemble–non-exceedance probability (E-NEP) algorithm for the quantitative evaluation of the possible occurrence of rainfall-induced landslides and of related geohydrological hazards. The ensemble of the metrics produced by the E-NEP algorithm provided better diagnostics than the single metrics often used for landslide forecasting, including rainfall duration, cumulated rainfall and rainfall intensity. We expect that the E-NEP algorithm will be useful for landslide early warning in karst areas and in other similar environments. We acknowledge that further tests are needed to evaluate the algorithm in different meteorological, geological and physiographical settings.
Assessing the risk posed by natural hazards to infrastructures
Authors: Eidsvig Unni Marie K. , Kristensen Krister , Vangelsten Bjørn Vidar
Published: March 2017

Abstract. This paper proposes a model for assessing the risk posed by natural hazards to infrastructures, with a focus on the indirect losses and loss of stability for the population relying on the infrastructure. The model prescribes a three-level analysis with increasing level of detail, moving from qualitative to quantitative analysis. The focus is on a methodology for semi-quantitative analyses to be performed at the second level. The purpose of this type of analysis is to perform a screening of the scenarios of natural hazards threatening the infrastructures, identifying the most critical scenarios and investigating the need for further analyses (third level). The proposed semi-quantitative methodology considers the frequency of the natural hazard, different aspects of vulnerability, including the physical vulnerability of the infrastructure itself, and the societal dependency on the infrastructure. An indicator-based approach is applied, ranking the indicators on a relative scale according to pre-defined ranking criteria. The proposed indicators, which characterise conditions that influence the probability of an infrastructure malfunctioning caused by a natural event, are defined as (1) robustness and buffer capacity, (2) level of protection, (3) quality/level of maintenance and renewal, (4) adaptability and quality of operational procedures and (5) transparency/complexity/degree of coupling. Further indicators describe conditions influencing the socio-economic consequences of the infrastructure malfunctioning, such as (1) redundancy and/or substitution, (2) cascading effects and dependencies, (3) preparedness and (4) early warning, emergency response and measures. The aggregated risk estimate is a combination of the semi-quantitative vulnerability indicators, as well as quantitative estimates of the frequency of the natural hazard, the potential duration of the infrastructure malfunctioning (e.g. depending on the required restoration effort) and the number of users of the infrastructure. Case studies for two Norwegian municipalities are presented for demonstration purposes, where risk posed by adverse weather and natural hazards to primary road, water supply and power networks is assessed. The application examples show that the proposed model provides a useful tool for screening of potential undesirable events, contributing to a targeted reduction of the risk.
Interactions between Antarctic sea ice and large-scale atmospheric modes in CMIP5 models
Authors: Schroeter Serena , Hobbs Will , Bindoff Nathaniel L.
Published: March 2017

Abstract. The response of Antarctic sea ice to large-scale patterns of atmospheric variability varies according to sea ice sector and season. In this study, interannual atmosphere–sea ice interactions were explored using observations and reanalysis data, and compared with simulated interactions by models in the Coupled Model Intercomparison Project Phase 5 (CMIP5). Simulated relationships between atmospheric variability and sea ice variability generally reproduced the observed relationships, though more closely during the season of sea ice advance than the season of sea ice retreat. Atmospheric influence on sea ice is known to be strongest during advance, and it appears that models are able to capture the dominance of the atmosphere during advance. Simulations of ocean–atmosphere–sea ice interactions during retreat, however, require further investigation. A large proportion of model ensemble members overestimated the relative importance of the Southern Annular Mode (SAM) compared with other modes of high southern latitude climate, while the influence of tropical forcing was underestimated. This result emerged particularly strongly during the season of sea ice retreat. The zonal patterns of the SAM in many models and its exaggerated influence on sea ice overwhelm the comparatively underestimated meridional influence, suggesting that simulated sea ice variability would become more zonally symmetric as a result. Across the seasons of sea ice advance and retreat, three of the five sectors did not reveal a strong relationship with a pattern of large-scale atmospheric variability in one or both seasons, indicating that sea ice in these sectors may be influenced more strongly by atmospheric variability unexplained by the major atmospheric modes, or by heat exchange in the ocean.
Leyendo la brujería: la escritura o reescritura de esta creencia en el Malleus Maleficarum
Authors: Lara Alberola Eva
Published: March 2017

En este artículo, seguiremos profundizando en el Malleus Maleficarum, tratado escrito por los inquisidores Institoris y Sprenger (continuando una investigación previa que realizaba ya una primera incursión en este texto), pues se trata de la piedra angular en la reinterpretación de la brujería a finales del siglo XV. En esta obra, tal y como demostramos en nuestro anterior trabajo, podemos hallar multitud de exempla catalogables como relatos ficcionales. Así, se corrobora que este y otros manuales pueden servir como materia prima de la cual rescatar multitud de narraciones de ficción. En esta ocasión, completaremos nuestro análisis del Martillo desde otra perspectiva: la escritura o reescritura que de la brujería como creencia y fenómeno se opera en esta obra; la creación o recreación de un gran relato construido a partir de la tradición oral, las confesiones de las víctimas y los imputados, y de los intermediarios que hacen llegar esta información a los autores.
Au lieu du péril de Luba Jurgenson: l’écriture narrative comme articulation et projection d’une doublé mémoire linguistique
Authors: Mangada Cañas Beatriz
Published: March 2017

Dans cet article les mémoires linguistiques de l’écrivaine franco-russe Luba Jurgenson seront objet d’étude dans le but de montrer leur latence et force inspiratrice d’une trajectoire littéraire marquée par le déplacement et le bilinguisme. L’étude de sa dernière publication permet de pointer sur les éléments thématiques, discursifs et linguistiques de cette particularité.
Nawawia oviformis sp. nov. from China
Authors: Peng Jie , Chang Dou , Huang Ying , Yu Ze-Fen
Published: March 2017

Nawawia oviformis, a new species collected from decaying leaves in China, is described and illustrated. It differs from previously described Nawawia species in having oviform conidia with 5 setulae, one of which is on the conidial apex.
Distribution of Alternaria species among sections. 3. Sections Infectoriae and Pseudoalternaria
Authors: Gannibal Philipp B. , Lawrence Daniel P.
Published: March 2017

Morphological examination of material conforming to the morphological description of Alternaria sect. Infectoriae (but not phylogenetically characterized) allowed the inclusion of nine additional species in this section, which thus encompasses 34 species. Alternaria
sect. Pseudoalternaria consists of two species and one misidentified isolate that represents a novel taxon, described here as Alternaria parvicaespitosa. Emended descriptions of A. sect. Infectoriae and A. sect. Pseudoalternaria are presented, and
their species are listed.
Zasmidium oleae sp. nov. from China
Authors: Li Bao-Ju , Xie Xue-Wen , Shi Yan-Xia , Chai A-Li , Guo Ying-Lan
Published: March 2017

A new species, Zasmidium oleae on Olea tsoongii is described, illustrated and discussed. The type specimen is deposited in HMAS.
Thelenella haradae sp. nov., a saxicolous lichen from South Korea
Authors: Halda Josef P. , Hur Jae–Seoun
Published: March 2017

A new species of saxicolous lichen is described, and named as Thelenella haradae. It occurs on exposed granite rocks of Mt. Daebang, Gyeongnam Prov., southern maritime Korea, and is similar to T. brasiliensis but differs in having wider ascospores (25–30 ×
13–17 μm) and completely immersed ascomata.
Podosporium bacilliforme sp. nov. and a first record of Phaeoblastophora peckii from southern China
Authors: Wang Jin-Ye , Zhang Kai , Yang Chun-Ling , Xia Ji-Wen , Ma Ying-Rui , Gao Jian-Mei , Li Xiang-Yu , Zhang Xiu-Guo , Cai Yu-Mei
Published: March 2017

Podosporium bacilliforme is described and illustrated from specimens collected on dead branches in Guangxi Province. The fungus is characterized by black synnematal conidiomata and monotretic clavate conidiogenous cells producing solitary elongate-bacilliform phragmoconidia.
Phaeoblastophora peckii is recorded for the first time in China.
Phaeocollybia pakistanica sp. nov., the first representative of the genus from Pakistan
Authors: Khan Junaid , Sher Hassan , Khalid Abdul Nasir
Published: March 2017

A new species of Phaeocollybia, P. pakistanica, is described that represents the first record of the genus from Pakistan. Diagnostic characters include purplish red to brownish red pilei, lilaceous gills, a monopodial radicating cartilaginous stipe, small ellipsoidal verruculose
brown spores, and thin-walled subcapitate cheilocystidia. ITS-nrDNA sequence analyses support P. pakistanica as an independent new species.
Mucor indicus isolated from the semiarid region of Brazil: a first record for South America
Authors: de Souza Carlos A.F. , Lima Diogo X. , de Oliveira Rafael J.V. , Gurgel Luciana M.S. , de A. Santiago André L.C.M.
Published: March 2017

A specimen of Mucor indicus was isolated from a dung sample collected in the city of Sertânia in the Brazilian state of Pernambuco and its identity confirmed through LSU rDNA sequence analysis. The taxon is described and illustrated for the first time from South America.
An identification key is provided for Mucor species from the northeast Brazilian semiarid region (Caatinga).
Blodgettia saprophytica sp. nov. and Uberispora tropicalis, new records from southern China
Authors: Yang Chun-Ling , Zhang Kai , Wang Jin-Ye , Xia Ji-Wen , Ma Ying-Rui , Gao Jian-Mei , Zhang Xiu-Guo , Li Zhuang
Published: March 2017

A new species, Blodgettia saprophytica, is described and illustrated from specimens collected on dead branches in Guangxi Province, China. Uberispora tropicalis is newly recorded from China.
Revision of some Peziza collections in herb. TAAM (Tartu)
Authors: Medardi Gianfranco , Lantieri Angela , Cacialli Gabriele
Published: March 2017

Forty samples representing the genus Peziza kept in the Mycological Herbarium, Tartu, Estonia (TAAM) were studied. Collection data and taxonomic comments are presented.
Long Term Dynamics of Indian ADRs Market: The Case of Persistence and Irregular Cycles
Authors: Bora Ivani Mausumi , Kumar Manoj
Published: March 2017

The focus of this study is to understand the previously ignored return generating dynamics of American Depositary Receipts (ADR) markets. The main objective of this study is to investigate the nature of the return generating process of the Indian ADRs market. Specifically, the study addresses following interrelated research questions: Do returns series of Indian ADRs market exhibit random walk behavior or rather depict persistence and nonlinear dynamics? Is there any cyclicity in the returns series of Indian ADRs market? Rescaled Range (R/S) method on daily and weekly return series of Bank of the New York Mellon Indian ADR index (BKIN) from 2002 to 2016 has been applied to address the above questions. Empirical findings revealed that returns series of Indian ADRs market: (a) do not exhibit random walk behavior and rather depict both nonlinear behavior and persistence (long range dependence); (b) possess non-periodic cycles of  0.793, 2.38 and approximately 7 years. The findings can work as crucial inputs to forecasting, risk-management and market regulation processes. The knowledge of the average cycle length and persistence will enhance preparedness to handle the opportunities and risks at all levels in the market.
An unusual cause of haemorrhage in the subthalamic nucleus of luys: A post-mortem study with 7.0 tesla magnetic resonance imaging correlates
Authors: Reuck Jacques De , Auger Florent , Durieux Nicolas , Deramecourt Vincent , Maurage Claude-Alain , Bordet Regis
Published: March 2017

The present case report is the first one of an isolated haemorrhage in the subthalamic nucleus of a patient with an isolated central nervous system relapse of systemic non-Hodgkin lymphoma. The neuropathological findings and 7.0-tesla magnetic resonance imaging correlates are presented.
Financial Incentives for Adopting Cloud Computing in Higher Educational Institutions
Authors: Al-Badi Ali , Tarhini Ali , Al-Kaaf Wafaa
Published: March 2017

Teaching today relies a great deal on IT resources which require large investments and there are many higher institutions that cannot afford such investments. Educational institutions usually search for opportunities to better manage their resources, especially after the economic crisis, which has resulted in reducing government support, especially in western countries. It is argued that ‘cloud computing’ is one of those opportunities for any educational institution due to its benefits in terms of cost reduction. Today, ‘cloud computing’ can be seen as one of the latest dynamic services in the IT world because of its flexibility. This paper investigates the financial incentives for adopting cloud computing in higher educational institutions. To achieve this objective the research employs a qualitative method to collect the data. Interviews were conducted with a number of cloud service providers, experts in the field and users/potential users of the cloud. The results reveal that cloud computing drives down up-front and on-going costs, and that the number of IT staff can be reduced if the cloud is adopted. Disaster recovery and business continuity are other cost-savings areas for an educational institute in adopting the cloud, and cloud computing provides low cost testing and a development environment solution.
Skills and Knowledge Competency of Technical and Vocational Education and Training Graduate
Authors: Ridzwan Che Rus , Malik S. , Hanapi Zaliza , Mohamed Suriani , Hussain Mohd Azlan , Shahrudin Shafeeqa
Published: March 2017

The Education Development Plan of Malaysia (Higher Education) carry the nation’s aspiration to empower the technical and vocational education and training (TVET) in Malaysia. The emphasis on the development of high quality TVET graduates demands teachers and instructors of TVET who are highly knowledgeable and skilled. Thus, the emphasis on the quality of TVET teachers’ education training of Faculty of Technical and Vocational Education (FTVE), Sultan Idris Education University (UPSI) has become an interesting issue that needs exploration. To evaluate the effectiveness of the education graduates, a quantitative survey research design using the Stuffelbeam evaluation model was carried out. The samples were FTVE graduates that have been placed in secondary schools and vocational colleges all over Malaysia. A total of 111 respondents have answered the questionnaire. The research findings showed that the level of professional knowledge, skills and practice were high. However, parallel to the concept of continuous improvement, the elements that are at the level of moderate will be evaluated for improvement. These research findings were expected to give some information to policy maker in TVET Teachers Training Provider to increase the quality of TVET graduates in UPSI specifically and Malaysia in general in order to uphold the aspiration to become a developed nation by 2020.
Quality of Work Life, Job Satisfaction, and the Facets of the Relationship between the Two Constructs
Authors: J. Ramawickrama , Opatha H. H. D. N. P. , D. PushpaKumari M.
Published: March 2017

Quality of Work Life (QWL) and job satisfaction are critical concepts in the field of Human Resource Management (HRM). An intellectual puzzle was chosen by the researchers with regard to whether QWL and job satisfaction are the same or different, and if different, how they are differed. By using the desk research strategy a systematic attempt was made to solve the intellectual puzzle to a reasonable extent. Both constructs were found to be different and related. Four facets of the relationship between the two constructs were revealed: Job satisfaction being a dimension of QWL; job satisfaction not being a dimension of QWL; job satisfaction working as an antecedent of QWL; and finally job satisfaction being a consequence of QWL. Formulated synthesis is perceived as an original contribution to the concepts of QWL and job satisfaction.
European Regional Inequalities: The Other Face of Development
Authors: Perrucchini Celeste , Ito Hiroshi
Published: March 2017

Empirical evidence suggests an overall convergence in terms of GDP and per capita income occurring among the European Union (EU) Member States. Nevertheless, economic inequalities have been increasing at the regional level within European Union countries. Through the review of relevant literature, this study analyzes the increasing inequalities from an economical point of view, focusing on Italy and the UK as examples. First, a general overlook of the empirical evidence of the GDP and per capita income at national and sub-national levels will be presented. Second, an explanation of the possible causes of the results will be proposed through the use of economical and sociological theories. The findings of this research might uncover the relative inefficacy of EU Cohesion policies and point towards the necessity for deeper and more thoughtful measures to continue the convergence of Member States while preserving internal equilibria. This paper ends with discussions for the future directions of the EU.
Digital Fingerprinting of Coffee Blending by Sensitive Crystallization
Authors: Guccione Pietro , Galati Antonella , Pusceddu Emanuela , Caliandro Rocco
Published: March 2017

The authenticity and quality of productions is an area of priority interest that involves safety of consumers and potential economic damages deriving from frauds on origin, adulteration and labeling of products. Several investigation techniques are currently used to characterize food matrices from physical-chemical-biological point of view using different methods in order to limit possible adulterations. In this work, we have developed an experimental and computational framework to improve the potentialities of sensitive crystallization: an experimental technique known since 1936, but never used for quantitative assessment of food quality. As a test case, it has been applied to investigate the geographical traceability and quality of coffee samples. An extensive statistical analysis associated with a careful choice of advanced image descriptors allows gathering quantitative information about the samples, which can constitute a digital fingerprint of their composition. With this new tool we are able to distinguish with blind tests high-quality coffee brands from low-quality mixtures, different coffee species, green from toasted condition of beans and, to a lesser extent, the macro-geographical provenience. A powder X-ray diffraction analysis reinforces the results obtained by sensitive crystallization for the case where crystalline domains are present in the coffee sample.
De curator, het boedeltekort en de schade van de rechtspersoon
Authors: Ortiz Aldana F. , van Bekkum J.
Published: March 2017

De curator, het boedeltekort en de schade van de rechtspersoon

Tussen artikel 2:9 en artikel 2:248 BW bestaan aanmerkelijke verschillen. Met name wordt op beide gronden iets anders gevorderd. Curatoren zouden de artikel 2:9 BW-vordering veel meer dan op dit moment gebruikelijk is als een zelfstandige vordering naast artikel 2:248 BW moeten behandelen. Dat voorkomt de potentiële verwaarlozing van een belangrijk boedelactief.
Projeto de extensão de inclusão digital: estratégias de relações públicas e de aproximação com a comunidade local
Authors: Rhoden Valmor , Tavares Victor Augusto Cinquini , Rhoden Juliana Lima Moreira
Published: March 2017

Este artigo é resultado de um projeto de extensão de inclusão digital realizado em São Borja, de 2012 a 2014. O objetivo foi contribuir para a cidadania e incluir no âmbito da informática e da cibercultura e teve como públicos alvos os adolescentes, adultos para a capacitação para o trabalho e idosos. Contemplou oito turmas e cerca de cento e vinte pessoas concluintes. Os resultados demonstraram a relevância do projeto que se preocupou com a inclusão digital e como estas vistas a partir das relações públicas são importantes, pois geram também uma imagem institucional positiva das instituições envolvidas junto ao público local.
O livro como construção simbólica: entre a identidade e as tensões
Authors: Moraes André Carlos
Published: March 2017

Através de revisão bibliográfica e interpretação de dados empíricos, busca-se apontar elementos para ajudar a compreender o aspecto coercitivo sociocultural representado pelo livro impresso e pela leitura em uma comunidade de leitores, cotejando-se as teorias sobre construção simbólica com a observação de uma amostra de estudantes universitários de primeiro ano. Este esforço inicial de aproximação ao problema não buscou resultados conclusivos, mas a delimitação de um espaço embasado de pesquisa para futura investigação aprofundada.
Ativismo mídiatico circunstancial – uma análise da relação entre representações mídiáticas e políticas
Authors: Sartoretto Paola Madrid
Published: March 2017

Mídia alternativa radical (Downing, 2000) é um tipo de produção midiática comum entre movimentos sociais cujos membros não veem suas causas representadas na mídia dominante. Esse é o caso do Movimento Sem-Terra (MST), que desde 1984 tem criado meios de comunicação próprios e produzido conteúdo para plataformas variadas, tornando-se mais tarde ativo na área da democratização da comunicação. Baseado em trabalho de campo realizado em 2013 e 2014, esse artigo propõe uma perspectiva de direito à comunicação que aborde a configuração estrutural do setor de comunicação e não apenas a provisão de tecnologias e habilidades de produção. O estudo demonstra que ação coletiva e promoção de mudanças estruturais ainda são relevantes, aliadas às novas tecnologias de comunicação.
O ensino de "Teorias da Comunicação" no Nordeste do Brasil: subsídios para refletir sobre a produção teórico-comunicativa Latino-americana
Authors: Gobbi Maria Cristina , Santos Augusto Junior da Silva , Rosa Bruno Navarini , Komono Emery Sumie Masuko , Nascimento Monique Dos Santos
Published: March 2017

Um dos desafios da Comunicação tem sido identificar como e quem tem contribuído para o desenho da área enquanto ciência. Articulado a essa questão, este artigo, que integra um trabalho mais amplo conduzido desde 2008, traz um panorama sobre as disciplinas “Teorias da Comunicação” ministradas em instituições de ensino superior públicas e particulares do Nordeste do Brasil, entre 2014-2015. Por meio de uma pesquisa analítico-descritiva, verificou-se as características dos planos de ensino, buscando pistas sobre as principais correntes teórico-metodológicas que fundamentam esse segmento de estudos na região. O resultado aponta que o campo ainda não definiu suas fronteiras, levando-o a buscar empréstimos em correntes mais consolidadas das Ciências Humanas e Sociais.
Voltage Stability Improvement By Using FACTS Elements With Economic Consideration
Authors: Kianersi Hadi , Asadi Hamid
Published: March 2017

In last two decades due to increasing power demand power systems are operated to their maximum operation conditions. It will cause to any problems that one of these is voltage instability. To overcome this problem Flexible AC Transmission Systems(FACTS) have been used in power systems. The FACTS devices improves system stability, reduce losses and power generation cost. Best location of FACTS devices will help to maintain bus voltages at desired level, reduce cost of these devices and improve voltage stability margins. This paper presents the methods to location and rating of FACTS devices are optimized with using weighted coefficients method and Sterength Paretto Evolutionary Algorithm(SPEA).Thyristor controlled series capacitor(TCSC)and Static Var Compensator(SVC)are also considered in this paper.
Simulation and Comparison of Control Methods of Doubly Fed Induction Generator in Energy Conversion System
Authors: Rahmani Omid , Amiri Parviz , Mokhtari Zahra , Amirjamshidi Zhale
Published: March 2017

One of the most applicable methods for utilization of wind energy is the use of doubly fed induction generator (DFIG). This paper presents two various strategies for control of DFIG in wind energy conversion system. Two most common and best control methods are implemented vector control and direct torque control. The studied control methods and their performance have been compared and analyzed based on the results of stimulation. The results indicate the fact that although direct torque control method is a bit slow at the start time; due to less usage of machine parameters, less complexity of control algorithm and improvement of transient response speed of the system, this method presents better performance compared to vector control method.
Optimal Planning and Management of Hybrid Vehicles in Smart Grid
Authors: Mortazavi Seyed Mohammad Bagher , Shiri Nabiolah , Javadi Mohammad Sadegh , Dehnavi Saeed Daneshvar
Published: March 2017

Smart grid can be expressed as a combination of power network substructures with an extensive telecommunication network which is able to provide a two-way communication and use of advanced sensors in order improve efficiency, system reliability, transport security, and power consumption. Loads in this network are divided into two groups, linear and non-linear. The majority of these loads on the network, such as rectifiers, electric vehicles are non-linear. The non-linear loads can cause odd harmonics in the network and can damage transformers. In this article, management and planning of hybrid vehicles for total harmonic index reduction and also annual cost reduction has been considered.
Design of New High-Performance Full Adder Using Hybrid-CMOS Logic Style for High-Speed Applications
Authors: Morad Milad Jalalian Abbasi , Talebiyan Seyyed Reza , Pakniyat Ebrahim
Published: March 2017

This paper, presents a new design for 1-bit full adder cell using hybrid-CMOS logic style. Using a novel structure for implementation of the proposed full adder caused it has better performance in terms of propagation delay and power-delay product (PDP) compared to its counterparts. According to the simulation results, the propagation delay of the proposed full adder is 22.8% less than the propagation delay of next fastest full adder, and the power-delay product of the proposed full adder is 22.7% less than the next best PDP. HSpice simulations using 65nm technology with a power supply of 1.2V was utilized to evaluate the performance of the circuits.
A Survey of Visual Attention Models
Authors: Hashemi Seyyed Mohammad Reza
Published: March 2017

The present paper surveys visual attention models, showing factors’ categorization. It also studies bottom-up models in comparison to top-to-down, spatial models compared to spatial-temporal ones, obvious attention against the hidden one, and space-based models against the object-based ones. It categorizes some challenging model issues, including biological calculations, correlation with the set of eye-movement data, as well as bottom-up and top-to-down topics, explaining each in details.
Solution of the space-fractional telegraph equations by using HAM
Authors: Abedi-Varaki Mehdi , Rajabi Shahram , Ghorbani Vahid , Hosseinzadeh Farzad
Published: March 2017

In this study by using the Homotopy Analysis Method (HAM) obtained approximate solutions for the space and time-fractional telegraph equations. In Caputo sense (Yildirim, 2010)these equations considered. Examples are solved and the obtained results show to be more accurate than Adomian Decomposition Method (ADM) and are more efficient and commodious.
Proxy electrochemical process for Acid humic
Authors: Kashi G. , Khoshab F.
Published: March 2017

Humic substances are produced by the microbial degradation of dead plant matter. The goal of this research is to investigate of humic acid (HA) from urban drinking water by batch proxy electrochemical reactor(PER)with using zinc-copper electrode(distance 2 cm) and hydrogen peroxide. The variables include pH(4-10), concentration of HA(5-15 mg/L), reaction time(7.5-22.5 min), concentration of hydrogen peroxide(40-120 mg/L), and current density(3-9 mA/cm2). In electrochemical reactor, the removal percentage for HA concentration(5 mg/L) in current density 9 mA/cm2 and electrolysis time 15 min in pHs 4, 7, and 10 are obtained 61%, 56%, and 51%, respectively. In electrochemical reactor, the removal percentage for HA concentration (15 mg/L) in current density 9 mA/cm2 and electrolysis time 15min in pHs 4, 7, and 10 are obtained 41%, 36%, and 31%, respectively. In PER, the removal percentage for HA concentration (5 mg/L), in optimum conditions, in hydrogen peroxide concentration 120 mg/L, current density 9 mA/cm2, optimum pH 4, electrolysis time 15 min in HA concentrations 5, 10, and 15 are obtained 100%, 93%, and 83%, respectively. The findings indicate that HA removal efficiency is increased with increasing current density, electrolysis time, and decreasing HA concentration. PER has appropriate efficiency for the HA removal from water.
Comparing the performance of Organic-inorganic hybrid tandem multijunction solar cells of different organic bulk thicknesses
Authors: Kosarian Abdolnabi , Kankanan Mehrdad , Khalafi Mohamad Ali
Published: March 2017

In this study, J-V curves of a-Si:H/PCPDTBT:PC70BM hybrid tandem solar cells were simulated using a modified drift-diffusion model, and the influence of the thickness of the organic blend layer was investigated. The results of the simulations were compared with experimental data from literature.It is shown that as the thickness of the blend layer increases, the fill factor and the voltage corresponding to maximum power point decrease whereas the maximum power point and the short circuit current density of solar cell increase up to thicknesses of 60 nm and 138 nm respectively. Finally, the modified organic solar cell was used as second sub-cell and the power conversion efficiency increased from 1.90% to 2.1% in simulation.
Preparation and In vitro Evaluation of Isoniazid-Containing Dex-HEMA-Co-PNIPAAm Nanogels
Authors: Jafari Maryam , Kaffashi Babak
Published: March 2017

In this work, Dex-HEMA-Co-PNIPAAm nanogels containing Isoniazid antibiotic were made. Characteristic features of nanogels were studied by Fourier transform infrared spectroscopy (FTIR), dynamic light scattering (DLS) and scanning electron microscopy (SEM). Drug loading capacity and entrapment efficiency were determined. In vitro drug release amount was estimated at room and body temperature. Biocompatibility of gels was investigated through cytotoxicity assay. Finally antimicrobial properties of synthesized gels were studied. It was shown from the experimental data that the nanogels size after drug loading increased about 1-2%. %Isoniazid loading and %entrapment efficiency were in the range of 15-22% and 37-48% respectively. After 10 days of degradation ca. 80% at 25ºC and ca. 90% at 37ºC of the nanogel structures were destructed. No significant toxic product produced while degradation and all nanogels depicted good biocompatibility. No antimicrobial features observed through the test condition against gram negative E Coli.
Safeguarding energy tunnels against explosive load by using concrete and soil annihilators
Authors: Hassanpour Mahmood Reza Toloue , Movahedifar Seyed Mojtaba
Published: March 2017

Utilization of buried structures is one of the usual approaches of non-factor defense in order to protect vital plants and arteries of cities against terroristic attacks (explosion). Besides the examination of the effect of surface and deep explosions on buried structures and how to model and analyze them in Abaqus software and in 3D mode, this study investigates various strategies to improve their safety. In this investigation, the influence of using concrete annihilators made horizontally on the upper surfaces of tunnels is examined. In addition, the improvement of the performance of these structures by using soft sand vertical sinks that are able to be made around energy tunnels, is examined. Investigations show that although using anti-explosion eagles reduces the damages of explosive loads, using mixed annihilators may effectively improve this performance.
Expression of Spatial Continuity of Architecture and Urban Development within Iranian Bazaars (Case Study: Tabriz Bazaar)
Authors: Mirzaei Vahid , Bemanian Mohammad Reza , Saremi Hamid Reza , Lilian Mohammad Reza
Published: March 2017

Architecture is a reality which is recognized within the space. Accordingly, there is a spatial continuity (hierarchy) across various elements in the historical context of old Iranian cities, which had promoted a kind of movement, dynamism, discipline and hierarchy. Without a discontinuity, an individual may find himself/herself within something with the sense of place would be induced into him/her. Iranian bazaars along with adjacent spaces are highlighted examples of such continuity. The present research is mainly aimed at providing a pattern of communication and physical spatial continuity within old Iranian architecture to be used by contemporary architecture. The main research question is that: how can one express the spatial continuity of architecture and urban development across bazaar?Followed in the present study is a descriptive – analytic approach. In particular, Tabriz Bazaar is considered via data gathered by documentary – field methods. The results emphasized on the fact that, meeting the principle of hierarchy, a spatial continuity is established, i.e. any activity defines a specific scope and territory. Furthermore, communication and physical features (the principle of link among urban elements) of architecture and urban development are created. Working as a joint, the principle of spatial continuity either connects or disconnects a place to/from another place; it is the physical connection between the spaces and their continuity.
Study of water salinity effect on geotechnical behavior of soil structure using response surface method (RSM), (Case study: Gotvand Dam)
Authors: Ajam Mohammad , Sabour Mohammad Reza , Dezvareh Gorban Ali
Published: March 2017

Specifying the mechanical characteristics of soil is as one of the major steps in designing the foundation for civil projects, particularly hydraulic structures. This study examines the water salinity effect on engineering characteristics of fine-grained soil in clayey core of Gotvand dam which it is located on the Karun River in Khuzestan province, Iran. For this purpose, three types of salt; sodium chloride, magnesium chloride and calcium sulfate is considered that the last one has the highest concentration in the water of reservoir behind the dam, and then their effect on the mechanical characteristics of clay including density, Atterberg limits, angel of internal friction, adhesion and open inflation have examined. Therefore, treatments required for testing were provided by combining the mentioned salts considering the weight percentage of salt in the water behind the dam and designing a test using response surface methodology (RSM). The results were statistically analyzed by RSM. Results showed that type and amount of soil salinity has no significant impact on the compaction characteristics of soil namely optimum moisture content and the maximum dry density. Results of changes in Atterberg limits showed that presence of salt ions reduces the plasticity of the soil and it was seen a certain decrease in the liquid limit and subsequently a dramatic drop in soil plasticity by increasing the percentage of soil; while the plastic limit remained almost unchanged. Eventually, results of open inflation showed that whatever the salt concentration be higher, the rate of sample's open inflation will be lower.
Application of Cooperative Distributed Predictive Control in Power Grid Frequency Adjustment
Authors: Iranmanesh Hamidreza , Afshar Ahmad
Published: March 2017

One of the efficient control methods is the model predictive control(MPC) that calculates appropriate system inputs to reduce the difference between the desired and the system predicted output. One of the important applications of this strategy is in power grids for load-frequency control and power balancing. Different architectures of MPC are applied in large scale structures such as power grid. In this paper a feasible cooperation based MPC(FC-MPC) controller has been used as a suited solution to control problem with relatively strict constraints. Also it can be used as one of options for control system of smart grids in future. In this paper, a power grid with 4 control zones has been chosen as a case study. The simulation results indicate the superior performance of the discussed control method in comparison with the traditional control of load- frequency.
Identification and prioritization the factors affecting the insurance industry customer preferences using KANO and AHP model (case study:the city of Kashan(
Authors: Sabbaghian Ali , Edalaty Maryam
Published: March 2017

It is noticed that the environmental changes in world market, impress the insurance companies, accepting new models for their business, as it is important to utilize the customers ideas for services, especially that the customers are affected by the environmental changes. The satisfied customers act for developing the insurance culture as, applying effective strategy, increasing the customer services and attracting the customers. In modern variable environment, it is necessary that the companies adopt themselves with variations, for continuing to survive life. Creating an appropriate structure is one of the main components and integrated features of today's societies and in the present competitive world, successful companies are those that of a step above theirs competitors. In this paper, it is tried to identificate the effective indicators in customer preferences using KANO model and finally prioritized using AHP model.
Produtos televisuais: trajetória e alterações de percurso
Authors: Strassburger Damaris
Published: March 2017

Resumo: A investigação propõe-se a examinar a trajetória de produtos televisuais que não têm data prevista para término, conferindo especial atenção às alterações de percurso por eles efetuadas com vistas à sua permanência no ar. Com essa finalidade, elegeu-se como objeto de estudo o programa Esquenta!, exibido inicialmente por temporadas, mas que, a partir de maio de 2013, passou a fazer parte da grade fixa de programação da Rede Globo de Televisão.Palavras-chave: Produtos televisuais. Subgênero programa de auditório. Programa Esquenta!. Estratégias comunicativas e discursivas. Productos televisivos: trayectoria y alteraciones del recorridoResumen: La investigación se propone examinar la trayectoria de los productos televisivos que no tienen fecha para la finalización, con especial atención a los cambios de curso realizados por ellos con vistas a su estancia en el aire. Para este fin, fue elegido como el objeto de estudio el programa Esquenta!, representada inicialmente por temporadas, pero que, desde mayo de 2013, pasó a formar parte de la red fija de la programación de televisión Rede Globo.Palabras clave: Productos televisivos. Subgénero programa de auditorio. Programa Esquenta!. Estrategias comunicativas y discursivas.Televisual products: trajectory and course changesAbstract: The investigation aims at examining the trajectory of televisual products that do not have estimated completion date, paying special attention to the course changes realized by them, aiming at staying on air. For this purpose, the show Esquenta!, initially broadcast by seasons, but, from May 2013 onwards, became a part of the fixed time slot of Rede Globo television network, was elected as object of study.Keywords: Televisual products. Subgenre auditorium show. Esquenta! TV show. Communicative and discursive strategies.
Consumo Midiático em Comunidade Online: Um Estudo Sobre o Mundo T-GIRL
Authors: Scherer Fernanda
Published: March 2017

Este estudo investiga o consumo de mídia no Mundo T-Girl, uma comunidade de mulheres transexuais e travestis no Facebook. Analisamos os sentidos que as integram e distinguem, objetivando compreender por que pertencem a esse espaço online. Diferente de outros âmbitos, na comunidade é possível compartilhar perspectivas e encontrar pessoas que compreendam suas aspirações, as quais incluem uma esfera social mais igualitária e o ajuste à feminilidade. RESUMEN Este estudio investiga el consumo de medios en Mundo T-Girl, una comunidad de mujeres transexuales y travestis en Facebook. Hemos analizado los sentidos que las integran y distinguen, para entender por qué pertenecen a este espacio online. A diferencia de otros lugares, en la comunidad pueden compartir perspectivas y encontrar personas que entienden sus aspiraciones, que incluyen una esfera social más igualitaria y el ajuste a la feminidad.Palabras-clave: Consumo de medios. Etnografía. Comunidad Online. Transexualidad. Travestilidad. ABSTRACT This study investigates the media consumption in the Mundo T-Girl, a community of transsexuals women and transvestis on Facebook. We have analyzed the senses that integrate and distinguish them, in order to understand the reasons to belong to this online space. Unlike other areas, in the community they can share perspectives and find people who understand their aspirations, which includes a more egalitarian social sphere and the adjustment to femininity.Keywords: Media Consumption. Cultural Consumption. Ethnography. Online Community. Transexuality. Travestility.
The type of Cypella Herbertii subsp. brevicristata Ravenna (Iridaceae: Tigridieae)
Authors: Deble Leonardo Paz , Alves Fabiano Da Silva
Published: March 2017

In the absence of original vouchers deposited in Herbaria of Cypella Herbertii subsp. brevicristata a neotype is proposed, having as base collections performed in the typical region of occurrence, in Artigas Department, Uruguay. Furthermore, description, photos, geographic distribution, conservation data are supplied, as well as its taxonomic relationships are discussed.