bluuebunny/crossref_metadata_2025 huggingface dataset:
A juvenile cf. Edmontosaurus annectens (Ornithischia, Hadrosauridae) femur documents a poorly represented growth stage for this taxon
Authors: Farke Andrew , Yip Eunice
Published: December 2018

A nearly complete, but isolated, femur of a small hadrosaurid from the Hell Creek Formation of Montana is tentatively referred to Edmontosaurus annectens. At 28 cm long, the element can be classified as that from an “early juvenile” individual, approximately 24 percent of the maximum known femur length for this species. Specimens from this size range and age class have not been described previously for E. annectens. Notable trends with increasing body size include increasingly distinct separation of the femoral head and greater trochanter, relative increase in the size of the cranial trochanter, a slight reduction in the relative breadth of the fourth trochanter, and a relative increase in the prominence of the cranial intercondylar groove. The gross profile of the femoral shaft is fairly consistent between the smallest and largest individuals. Although an ontogenetic change from relatively symmetrical to an asymmetrical shape in the fourth trochanter has been suggested previously, the new juvenile specimen shows an asymmetric fourth trochanter. Thus, there may not be a consistent ontogenetic pattern in trochanteric morphology. An isometric relationship between femoral circumference and femoral length is confirmed for Edmontosaurus. Overall ontogenetic trends in the femur of Edmontosaurus are concordant with patterns seen in other Hadrosauridae, supporting a fairly conserved pattern of development for this element within the clade.
Contextual Framing of Loss Impacts Harm Avoidance during Risky Spatial Decisions
Authors: Jarbo Kevin , Colaço David , Verstynen Timothy D.
Published: December 2018

While the same decision to act can occur in multiple contexts, how these contexts differentially influence behavior is not well understood. In this paper, we investigate whether contextual framing affects individuals’ behavior in spatial decision-making. While previous research suggests that individuals’ judgments are sensitive to contextual (and particularly moral) factors of a scenario, no work has addressed whether this effect extends to spatial decisions. To investigate the impact of context on perceptual sensorimotor behavior, we superimposed two moral dilemmas (which we call help and harm) on a spatial decision-making paradigm (Jarbo, Flemming, & Verstynen, 2017). The basic task required participants select a target area while avoiding an overlapping non-target area. While the visuospatial task was constant, the moral context was changed when participants had to execute either a drone missile strike on enemies in the harm context or deliver ammunition to allies in the help context. Participants more strongly avoided losses in the harm context, reflected by a greater selection bias away from the non-target (i.e., allies) on drone strike trials. These findings suggest that the contextual framing of a subjective perceived loss on a spatial decision can drive avoidant motor execution behavior.
The open diffusion data derivatives, brain data upcycling via integrated publishing of derivatives and reproducible open cloud services
Authors: Avesani Paolo , McPherson Brent , Hayashi Soichi , Caiafa Cesar , Henschel Robert , Garyfallidis Eleftherios , Kitchell Lindsey , Bullock Daniel , Patterson Andrew , Olivetti Emanuele , Sporns Olaf , Saykin Andrew , Wang Lei , Dinov Ivo , Hancock David , Caron Bradley , Qian Yiming , Pestilli Franco
Published: December 2018

We describe the Open Diffusion Data Derivatives (O3D) repository: an integrated collection of preserved brain data derivatives and processing pipelines, published together using a single digital-object-identifier. The data derivatives were generated using modern diffusion-weighted magnetic resonance imaging data (dMRI) with diverse properties of resolution and signal-to-noise ratio. In addition to the data, we publish all processing pipelines (also referred to as open cloud services). The pipelines utilize modern methods for neuroimaging data processing (diffusion-signal modelling, fiber tracking, tractography evaluation, white matter segmentation, and structural connectome construction). The O3D open services can allow cognitive and clinical neuroscientists to run the connectome mapping algorithms on new, user-uploaded, data. Open source code implementing all O3D services is also provided to allow computational and computer scientists to reuse and extend the processing methods. Publishing both data-derivatives and integrated processing pipeline promotes practices for scientific reproducibility and data upcycling by providing open access to the research assets for utilization by multiple scientific communities.
Music Performance Attendance and Happiness
Authors: Smith Byron D.
Published: December 2018

How are the performing arts and happiness sociologically connected? I propose that people who have attended a music performance in the last 12 months will report an increase in happiness. Additional knowledge-besides attending Arts-related events-is required in order to understand what makes people happy. I analyzed 2016 General Social Survey (GSS) data. The N for this sample is 1,272. Personal happiness is directly tied to one’s financial situation and their educational attainment levels and not to attendance at music performances. The results indicate that satisfaction with finances has a greater impact on happiness, and that White people also report being happier on average. Being satisfied with your financial situation has more of an impact on personal happiness than one’s years of education.
MASS MIGRATION MOVEMENTS TO TURKEY: THE CASES OF TURKS OF BULGARIA, NORTHERN IRAQIS, AND SYRIANS
Authors: Ayasli Enes
Published: December 2018

This thesis analyzes the Turkish migratory responses towards three different mass migration movements, namely Turks of Bulgaria, Northern Iraqis and Syrians, to reveal similarities and differences. While doing so, it will design an analytical framework built on an existing study, explaining motives of the Turkish state responses. The thesis, by tracing the history of the given cases, will also try to demonstrate whether refuges are used as tools of Turkish Foreign Policy or not.
Cytomorphological Spectrums in Tuberculous Lymphadenitis: Understanding the Stages of Disease
Authors: Pradhan Anju , Poudyal P. , Upadhyaya P. , Pokhrel S.
Published: December 2018

Introduction: Tuberculous lymphadenitis is the most common form of extrapulmonary tuberculosis and one of the main causes of lymphadenopathy. Fine Needle Aspiration Cytology (FNAC) has played a substantial role in diagnosis of tuberculous lymphadenopathy and it has become a first-line diagnostic technique. The aim of this study was to describe and understand the spectrum of cytomorphological changes seen in tuberculous lymphadenitis corresponding to stages of disease and to associate the cytomorphological changes with Acid Fast Bacilli (AFB) positivity.

Methods: This is a retrospective cytomorphological study of cytologically diagnosed tuberculous lymphadenitis. The recorded details of clinical presentation and site of the lymph nodes were noted. The slides were stained with Papanicolaou, Giemsa and AFB.

Result: There were a total of 203 cases with age ranging from 3- 75 years. Four cytomorphological patterns observed were Necrotising Granulomatous Lymphadenitis (NGL; 45.32%), Granulomatous Lymphadenitis (GL, 18.22%), Necrotising Suppurative Lymphadenitis (NSL; 21.18%) and Necrotising Lymphadenitis (NL; 15.27%). Necrotising patterns were observed in immunocompromised individuals like HIV infected patients, in patients with previous history of tuberculosis and in patients with chronic renal disease. Strong AFB positivity was observed in necrotising patterns. Lymph nodes of head and neck region were the most common site of involvement with cervical being the commonest.

Conclusion: Necrotizing patterns are observed in the later stages of disease or in the immunocompromised patients. Strong positivity for AFB is observed in the smears with necrotizing patterns and less in the granulomatous pattern.
Ser Professor: uma (pre)ocupação legislativa?
Authors: Bonifácio Evangelina , Lopes de Azevedo Maria
Published: December 2018

Os discursos, público e institucional, baseiam-se na urgente necessidade de valorização da profissão docente e na indispensabilidade de (re)pensar a formação docente bem como as condições de exercício da profissão exigindo professores altamente qualificados em todas as dimensões pessoais e humanas. Nesse sentido, o objetivo deste artigo centra-se na análise das recomendações produzidas pelo Conselho Nacional de Educação (CNE-Portugal) sobre a condição docente e as políticas educativas, publicadas em dezembro de 2016 - Recomendação nº 1/2016, publicada no Diário da República, 2 ª Série, nº 241. Assim, partindo de uma metodologia qualitativa, procedemos a uma reflexão teórica alicerçada, sobretudo, numa análise interpretativa do documento referido, a qual reforçamos com segmentos de textos decorrentes de uma avaliação, solicitada a alunos de mestrado em educação, no final da realização de um estágio pedagógico. Globalmente sustentamos esta reflexão no ciclo de políticas de Mainardes (2006) procedendo à análise dos referidos discursos complementando, ainda, este exercício analítico com autores de referência e identificando os reptos que se colocam à profissão professor, admitindo a necessidade de uma formação sólida. Em termos de resultados ressalvamos que estão, ainda, a ser trabalhados, mas desde já é possível afirmar que a profissão tende a ser valorizada nos discursos e nos documentos oficiais. Relativamente aos alunos (futuros professores) identificaram, de viva voz, um conjunto de aspetos lacunares salientando-se o escasso tempo de formação em contexto escolar.
O norte é o sulear: educação escolar quilombola, diálogos urgentes
Authors: Araújo Eleno Marques de , Gonzaga Samuel Pedro , Dantas Rejane Maria
Published: December 2018

Esta pesquisa não finaliza as possibilidades acerca do tema educação escolar quilombola. Nela foi usado o termo cunhado por Freire (1992) “Sulear”, que sobre as teias de possibilidades sócio-histórico-culturais oferecidas pela educação brasileira, aponta a Educação Escolar Quilombola, como uma afroperspectiva sulear.  Os saberes dos povos africanos e afro-brasileiros colaboram com a (re)significação das escolas brasileiras, com seu ensino, mas diferente do que está estabelecido pelas estruturas tradicionais (liberais, neoliberais). O Tema da educação escolar quilomba é muito apreciado e discutido nos encontros educacionais nacionais e internacionais. Essas ideias contaram com o aporte teórico em Freire (1992), Sousa Santos e Meneses (2009), Campos (2016) entre outros. A investigação cientifica foi de cunho bibliográfico e documental com dados coletados em fontes da Biblioteca Digital Brasileira de Teses e Dissertações, Livros, Revistas Eletrônicas Teias, Scielo, dentre outras. Os resultados indicaram propostas suleares com novas ações educacionais, como é o caso da História da África e Afro-brasileira da educação básica ao ensino superior e que, desta forma, as Escolas Quilombolas têm possibilidades de adentrarem na sociedade e, juntos com as demandas sociais brasileiras, amplificarem e atribuírem modelos de gestão educacional respaldados e alicerçados nas temáticas das interculturalidades. Existem muitas pessoas que são historicamente marginalizadas, ou seja, são social, cultural, econômica e politicamente excluídas das escolas, como pessoas com deficiências, transgêneros, ciganos, homoafetivos, negros, quilombolas, refugiados, entre outros seres sociais brasileiros, que são partícipes da (re)significação da nação brasileira.
Usporedba karakteristika sorata vinove loze Babica i Tribidrag
Authors: Skračić Živko , Banović Mara
Published: December 2018

Vinogorje Kaštela–Trogir je područje uzgoja mnogih autohtonih sorti vinove loze. Od crnog sortimenta najzastupljenija je sorta Babica. Nakon što je DNK analizom utvrđena genetska istovjetnost kalifornijskog Zinfandela, te talijanskog Primitiva s Tribidragom započinje njegova revitalizacija. Iz komercijalnih razloga površine pod Tribidragom se povećavaju, a Babice i ostalih sorti opadaju. Dok se zadnjih godina pojavljuju neke nove okolnosti koje otežavaju uzgoj Tribidraga, Babica zaslužuje biti predmetom vinogradarskog interesa, tim više što sve mogućnosti njenog enološkog potencijala nisu u potpunosti iskorištene.
Vinski kultivari vinove loze u Hercegovini
Authors: Rotim Nino , Gašpar Mladen , Perić Ivica
Published: December 2018

Prema povijesnim podatcima vinova loza se na području Hercegovine uzgajala i u vrijeme starih Ilira, odnosno plemena Daorsa. Danas se prema procjenama u BiH nalazi oko 4.000 hektara pod vinovom lozom. U mnoštvu vinskih kultivara lokalnog sortimenta svojom kakvoćom izdvojili su se kultivari Žilavka i Blatina. Uz Žilavku se u hercegovačkim nasadima vinove loze uzgajaju prateće sorte Bena, Krkošija i Dobrogostina, a uz Blatinu autohtoni kultivar Trnjak, kao i poznati svjetski kultivari Vranac, Merlot i Alicante Bouschet. U razdoblju nakon Domovinskog rata na području Hercegovine podižu se i nasadi vinove loze u kojima su zastupljeni i ostali, cijenjeni kultivari kao što su Syrah, Chardonnay, Cabernet sauvignon, Souvignon blanc, Muscat ottonel, Graševina i brojni drugi.
Važniji štetnici šipka na području Hercegovine
Authors: Rotim Nino , Ostojić Ivan
Published: December 2018

Šipak (Punica granatum) se u Hercegovini uzgaja na površini od 54,41 ha. U okviru 58 intenzivnih nasada šipka evidentirano je 43.248 stabala ove voćne vrste. Podizanjem intenzivnih nasada u uzgoju šipka pojavili su se brojni štetnici koji ugrožavaju proizvodnju i izazivaju ekonomski značajne štete. Značajniji štetnici u nasadima šipka na području Hercegovine su: Myzus persicae, Siphoninus phillyrea, Ceratitis capitata i Zeuzera pyrina. U radu će biti prikazane biološke i ekološke karakteristike štetnika te mogućnosti zaštite šipka.
Alternaria dauci (palež lišća mrkve) i učinkovitost mjera kemijske zaštite nekim novijim fungicidima
Authors: Trajčevski Tanas
Published: December 2018

Tijekom 2014. i 2015. godine izvršeno je ispitivanje djelotvornosti kemijske zaštite mrkve od napada patogena Alternaria dauci (Kuhn) Groves & Skolko-uzročnika crnog sušenja te paleži lišća mrkve, u selu Stajkovci u okolici Grada Skoplja. Tijekom analize ispitana je učinkovitost zaštite od napada patogena Alternaria dauci (Kuhn) Groves & Skolko novijim fungicidima u usporedbi s nekim starijim fungicidima, tretmanom u različitim uvjetima (oborine i vlage), odnosno u relativno vlažnoj 2014. godini i 2015., koja je bilježila manje oborina. Izvedenim pokusima utvrđeno je da je u 2014. godini, s mnogo oborina, najbolja djelotvornost postignuta primjenom fungicida Score 250 EC (difenakonazol) s indeksom učinkovitosti od 81,45%. Nešto manji indeks učinkovitosti 79,99%, te 79,53% pokazali su fungicidi Sighnum (boskalid + piroksistrobin) i Quadris (azoksistrobin). Fungicidi Dithane M-45 (mankozeb) i Kocide (bakarni hidroksid) pokazali su indeks učinkovitosti 68,38% ,odnosno 70,91%. Pri ispitivanjima u 2015. godini (manje oborina), najbolji indeks 93,62% pokazao je fungicid Score 250 EC (difenokonazol). Dobru učinkovitost je pokazao i fungicid Quadris (azoiksistrobin) s indeksom učinkovitosti od 91,97%. Nešto slabija učinkovitost je zabilježena kod fungicida Dithane M-45 (mankozeb) s indeksom učinkovitosti 75,85%.
Microgreens kao funkcionalna hrana
Authors: Opačić Nevena , Šagud Anja , Skomrak Antonia , Đurak Josipa , Kos Fabijan , Butković Marijan , Fabek Uher Sanja
Published: December 2018

Među funkcionalnim namirnicama posljednjih godina često se ističu microgreens različitog povrća, aromatičnog bilja i žitarica kao izvor polifenola, vitamina i minerala, koji pokazuju pozitivan utjecaj na ljudsko zdravlje. Microgreens se konzumiraju u fazi kotiledona i nepotpuno razvijenih prvih pravih listova u svježem stanju pa ne dolazi do gubitka hranjivih tvari tijekom obrade. Nutricionisti preporučuju konzumaciju microgreensa zbog veće količine vitamina i minerala, odnosno, manje količine nitrata u odnosu na potpuno razvijene biljke. U radu je, na temelju pregleda literature, prikazan izbor vrsta, nutritivna vrijednost, tehnologija uzgoja i upotreba microgreensa.
Optimizacija gnojidbe usjeva dušikom u održivoj poljoprivrednoj proizvodnji
Authors: Jug Irena , Đurđević Boris , Vukadinović Vesna , Jug Danijel , Brozović Bojana
Published: December 2018

Održiva poljoprivreda temelji se na načelima prilagodbe agroekosustava stanišnim čimbenicima nekog područja i optimalnom korištenju biološko-fizikalno-kemijskih resursa. Mjerama dobre poljoprivredne prakse provode se optimalni agrotehnički zahvati koji osiguravaju stabilne prinose bez štetnog djelovanja na okoliš. Cilj ovog rada bio je utvrditi optimalnu, profitabilnu i ekološki prihvatljivu gnojidbu dušikom za tri najzastupljenija usjeva istočne Hrvatske: kukuruz, pšenicu i soju uz praćenje razine podzemne vode i koncentracije NO3- i NH4+. Koncentracija nitratnog dušika u podzemnoj vodi na lokalitetima Šljivoševci i Ćelije kretala se od 16 mg NO3- dm-3 do 34 mg NO3- dm-3, a NH4+ od 3,2 do 9,3 mg NH4+ dm-3. Najveći prinos, najgušći sklop i najveća masa žetvenih ostataka pšenice ostvareni su na tretmanu sa 170 kg N ha-1, dok su najmanji prinos, najrjeđi sklop i najmanja masa žetvenih ostataka zabilježeni na kontroli i na tretmanu gnojidbe stajskim gnojem. Najveći prinosi i najveća masa žetvenih ostataka soje ostvareni su na lokalitetu Šljivoševci pri gnojidbi od 50 kg N ha-1, dok su najmanji prinosi izmjereni na kontroli. Najveći prinosi kukuruza izmjereni su u Šljivoševcima na tretmanu s 170 kg N ha-1, a najmanji na kontroli. Masa žetvenih ostataka nije bila pod utjecajem gnojidbe, a najveći sklop je izmjeren na tretmanu sa 150 kg N ha-1 na lokalitetu Šljivoševci. Dobiveni rezultati ukazuju na važnost dobrog poznavanja dinamike i raspoloživosti hraniva, posebice dušika i primjenjivanja gnojiva u skladu s biološkim, ekonomskim i ekološkim uvjetima. Visinu prinosa potrebno je promatrati kroz profitabilnost proizvodnje istovremeno vodeći računa o očuvanju plodnosti tla, sprječavanju njegove degradacije i zaštiti okoliša.
Primarne arome grožđa bijelih kultivara dobivenih međuvrsnim križanjem
Authors: Maslov Bandić Luna , Peršin Filip , Karoglan Kontić Jasminka
Published: December 2018

Uz veliki broj kultivara vinove loze (Vitis vinifera L.), danas se sve veća pažnja posvećuje mogućnosti uzgoja kultivara međuvrsnih hibrida s otpornošću na gljivične bolesti i abiotske stresove. Kultivari međuvrsnih hibrida nastali su križanjem kultivara vinove loze (Vitis vinifera L.) i nekih drugih vrsta roda Vitis. Uz međuvrsne hibride često se veže i prisutnost nekih nepoželjnih aroma (najčešće se navode tzv. foxy ili strawberry-like arome) podrijetlom od aromatskih spojeva identificiranih u najstarijim generacijama međuvrsnih hibrida. Zato se pri evaluaciji ovih sorata njihovom aromatskom profilu pridaje velika važnost. Istraživanje je provedeno na 11 kultivara. Analizirani kultivari pripadaju međuvrsnim križancima nastalim u oplemenjivačkim programima u Mađarskoj, Njemačkoj i Srbiji: „Bačka“, „Bianca“, „Johanniter“, „Kozmopolita“, „Lisa“, „Merzling“, „Orion“, „Phoenix“, „Sirius“, „Solaris“ i „Staufer“. U ovom istraživanju provedena je analiza sastava aromatskih spojeva lociranih u kožici grožđa. Putem vezanog sustava plinska kromatografija-spektrometrija masa (GC-MS) određen je aromatski profil kultivara.
Važnost kalcija (Ca) u gnojidbi jabuke
Authors: Gluhić David
Published: December 2018

Kalcij (Ca) je važan element u gnojidbi jabuke te je direktno vezan uz kvalitetu plodova. Uslijed nedostatka kalcija (Ca) u plodovima jabuke dolazi do pojave gorkih pjega. Gorke pjege su posljedica fiziološkog poremećaja kod usvajanja kalcija tijekom rasta i razvoja plodova jabuka. Postoji mnogo razloga za pojavu gorkih pjega, te je u modernom uzgoju jabuka potrebno voditi računa o svim čimbenicima koji ograničavaju usvajanje kalcija. Pravilna gnojidba i izbor gnojiva na bazi kalcija može značajno smanjiti pojavu gorkih pjega u jabukama.
Senzorski poduprti sustavi za mehaničko uništavanje korova u kukuruzu i šećernoj repi
Authors: Stajnko Denis
Published: December 2018

U ovom su istraživanju prikazani temeljni principi rada strojeva za mehaničko uništavanje korova (međuredna kultivacija) u kukuruzu i šećernoj repi te kultivacija unutar redova usjeva koja je omogućena razvojem različitih prstastih kultivatora. Kako bi se olakšao rad traktoriste i ubrzao radni proces nužna je upotreba senzorskih pomagala bilo na temelju RGB slike te odgovarajućih mikro-kontrolera odnosno u zadnje vrijeme sve dostupnijih autonomnih sustava (RTK-GPS) navođenja strojeva. Za njihovu upotrebu nužna je precizna sadnja istim sustavom te izrada karata pomoću kojih se provodi kultivacija. Pravu budućnost kultivacije kukuruza i šećerne repe predstavlja razvoj i vođenje autonomnih robota za kultivaciju koji u svakom trenutku pomoću bi-spektralnih sustava analize slike te RTK-GPS navođenjem traže i uništavaju korove bez neposredne ljudske kontrole na polju.
Istraživanje preferencija u odabiru sobnog bilja za interijere na primjeru Veleučilišta „Marko Marulić“ u Kninu
Authors: Dorbić Boris , Gugić Mirko , Hadžiabulić Alisa , Zrno Željko , Šuste Marko , Gugić Josip , Šarolić Mladenka , Temim Elma , Čuturić Tin , Marić Aleksandar
Published: December 2018

Upotreba sobnog bilja potječe još iz davne povijesti čovječanstva. Većina sobnog bilja koja se koristi u ukrašavanju interijera dolazi iz tropskih i suptropskih područja, dok ih manji broj dolazi iz umjerene klime. Prilikom odabira biljke za ukrašavanje interijera, važno je imati na umu da neke biljke nisu uvijek „moderne“ te također da ljudi imaju različita mišljenja vezano uz takav odabir. Cilj ovog rada je odrediti odgovarajuće sobno bilje za interijer jedne institucije visokog obrazovanja te utvrditi cjelokupni vizualni dojam (vizualni „geštalt“) putem ankete vezane uz određene odabrane lončanice u interijeru prostorija Veleučilišta „Marko Marulić“ u Kninu. Istraživanje je provedeno putem ankete tijekom studenog i prosinca 2014. godine na uzorku od 43 ispitanika (studenata i zaposlenika). Ustanovljeno je da su različite palme i lončanice dobile najbolje ocjene i najbolje su prihvaćene za upotrebu u interijeru Veleučilišta.
Altered Neural Networks in the Papez Circuit: Implications for Cognitive Dysfunction after Cerebral Ischemia
Authors: Escobar Iris , Xu Jing , Jackson Charles W. , Perez-Pinzon Miguel A.
Published: December 2018

Cerebral ischemia remains a leading cause of mortality worldwide. Although the incidence of death has decreased over the years, surviving patients may suffer from long-term cognitive impairments and have an increased risk for dementia. Unfortunately, research aimed toward developing therapies that can improve cognitive outcomes following cerebral ischemia has proved difficult given the fact that little is known about the underlying processes involved. Nevertheless, mechanisms that disrupt neural network activity may provide valuable insight, since disturbances in both local and global networks in the brain have been associated with deficits in cognition. In this review, we suggest that abnormal neural dynamics within different brain networks may arise from disruptions in synaptic plasticity processes and circuitry after ischemia. This discussion primarily concerns disruptions in local network activity within the hippocampus and other extra-hippocampal components of the Papez circuit, given their role in memory processing. However, impaired synaptic plasticity processes and disruptions in structural and functional connections within the Papez circuit have important implications for alterations within the global network, as well. Although much work is required to establish this relationship, evidence thus far suggests there is a link. If pursued further, findings may lead toward a better understanding of how deficits in cognition arise, not only in cerebral ischemia, but in other neurological diseases as well.
Particle Swarm Optimization and strength pareto to solve multiobjective optimization problems
Authors: Barbosa Leandro Zavarez , dos S. Coelho Leandro , Lebensztajn Luiz
Published: December 2018

Many attempts have been made to extend Particle Swarm Optimization to solve Multiobjective Problems. In this paper, the Strength Pareto concept, proposed by Zitzler, is incorporated to a Particle Swarm Optimization to build a new approach to solve Multiobjective Optimization Problems, the Multiobjective Strength Pareto Particle Swarm Optimization. Numerical results are reported to validate the proposed method to solve some unconstrained benchmarks problems and a constrained design of a brushless direct current motor.
Numerical calculation and comparison of temperature profiles and martensite microstructures in induction surface hardening processes
Authors: Schlesselmann D. , Nikanorov A. , Nacke B. , Galunin S. , Schön M. , Yu Z.
Published: December 2018

In the present paper, a new numerical model for calculating martensite microstructure in induction surface hardening processes is introduced. The model was developed with the help of the Department of Electrotechnology and Converter Engineering (LETI). It takes into account the heating as well as the quenching process and uses the temperature history of a work piece to calculate martensite formation. The calculation is based on an empirical equation found by Koistinen and Marburger [1]. A comparison between the heat distribution within a work piece at the end of the heating process and the distribution of martensite after quenching is performed for different process parameters. Thus, it is determined, in which case the temperature distribution is sufficient to predict the hardened layer and in which case the microstructure has to be calculated to receive accurate results. The model is verified by comparing simulation results with different experiments.
Flow measurement in metal melts using a non-contact surface velocity sensor based on time-of-flight Lorentz force velocimetry
Authors: Schumacher D. , Karcher Ch.
Published: December 2018

This paper attempts to present a novel development of an electromagnetic non-contact surface velocity measurement technique in electrically conducting liquids which could be applied in high-temperature metallurgical processes involving metal melts. The technique is based on Lorentz force velocimetry, i.e. on measuring the force which is generated by the interactions of the melt flow and an externally applied magnetic field that is spanned by permanent magnet system. The electromagnetically induced force pushes the magnet system into the direction of the flow and can be measured using a force sensor that is attached to the magnet system. As the measured force linearly depends on melt velocity, a non-contact evaluation of the velocity can be achieved. However, the recorded force also depends on the electrical conductivity of the melt. In application this material property is a priori unknown as it strongly depends on both temperature and composition of the melt. Hence, calibration of such a measuring device becomes a cumbersome task. Our development aims to circumvent this deficit by applying a time-of-flight technique. According to this principle we design and test a prototype of sensor for measuring free-surface velocity. In the model experiments we use both solid bodies and the liquid metal GaInSn as test liquids.
Parametric {\it vs} non-parametric optimal design of induction heating devices
Authors: Di Barba P. , Dughiero F. , Forzan M. , Sieni E.
Published: December 2018

A comparison between a classical parametric NSGA (Non-dominated Sorting Genetic Algorithm) and a non-parametric NSKA (Non domination Sorting Kinetic Algorithm) optimization method is proposed on a benchmark problem of inverse induction heating characterized by two conflicting objectives.
Efficiency optimization for phase controlled multi-source microwave oven
Authors: Więckowski A. , Korpas P. , Krysicki M. , Dughiero F. , Bullo M. , Bressan F. , Fager C.
Published: December 2018

A solid-state microwave generators system is considered as an alternative to the magnetron, in order to inject electromagnetic energy into the cavity of a microwave oven for domestic use. Over current devices, the use of solid state technology allows one to control the frequency and phase of the electromagnetic field generated.

Considering a simplified cavity with 2 solid state sources, the influence of the electrical parameters on maximum efficiency obtainable in the process of microwave heating is investigated. By varying the frequency, different values of optimal phases and different values of maximum efficiency are detected.

Moreover, the procedure is repeated with varying the position of one source port and the influence of geometry on the system performance is evaluated.

Our results demonstrate that the ability to control the electrical quantities of a microwave heating process makes it possible to obtain better results in terms of energy efficiency over the current poorly controllable systems.
Investigation of negative resistance shunt damping for the vibration control of a plate
Authors: Yan Bo , Zhang Xinong , Luo Yajun
Published: December 2018

In this study, vibration isolation of a plate is investigated by using an electromagnetic shunt damping vibration isolator. The isolator consists of a box-shaped spring, a permanent magnet, an electromagnet, and a shunt circuit. The two ends of the electromagnet connect the negative resistance shunt impedance to constitute a circuit. In principle, the negative resistance shunt impedance could improve the damping force by canceling the inherent resistance of the electromagnet. The governing equation of the plate is established according to Hamilton's principle and Galerkin's method. The numerical simulation is conducted and the result demonstrates that the isolator with the negative resistance shunt circuit is able to dampen the vibration of the plate. What's more, an interesting phenomenon is that the negative resistance shunt influences the natural frequencies of the coupling system.
Study on pump using liquid crystalline flow under electric field
Authors: Tsukiji Tetsuhiro , Miyahara Kohei
Published: December 2018

This paper presents small pumps to transport liquid crystal, herein called a liquid crystal pump. The mechanism of liquid crystalline flow by applying an electric field to the liquid crystal is used to generate one-directional flow in a pump. In this study, the pressure-flow rate characteristics of the pump were measured and the relationships between the non-dimensional flow rate and pressure of the pump were obtained. In addition the silicone oil is also used to compare the flow phenomenon with the liquid crystalline flow under application of the electric field. The structure of a liquid crystal pump is simple and the size can be decreased by further research. So our pump has a good possibility for use in cooling system because it makes no noise and no mechanical vibrations.
Measurement of residual stress with laser-EMAT ultrasonic method
Authors: Pei Cuixiang , Wu Wenjiang , Uesaka Mitsuru , Demachi Kazuyuki , Fukuchi Tetsuo , Hirai Shunsuke
Published: December 2018

In this work, a non-contact ultrasonic method based on laser generation and EMAT (electromagnetic acoustic transducer) detection is proposed for residual stress measurement. A numerical method based on finite element model is established to simulate the laser-generated ultrasound in pre-stressed media to determine the capability and sensitivity of this method. Finally, the laser-EMAT ultrasonic method isstudied to measure the residual stress in bearing balls to assess the fatigue level of the bearings.
3D electro-mechanical modeling of conductor after stranding and compacting process simulation
Authors: Zeroukhi Youcef , Vega Guillaume , Juszczak Ewa Napieralska , Morganti Fabrice , Komeza Krzysztof
Published: December 2018

In this paper we propose a new method using finite elements modelling to predict the impact of stranding and compacting process on a conductor electrical resistance. The experimental work has highlighted the complexity of physical phenomenon within the conductor caused by elastic and plastic deformations and inters-strands electrical contact resistance. In reality, electrical performance of a conductor depends on the nature of the material and its metallurgical state, on the mechanical pressure and electrical conductance of inter-strands contact areas. For these reasons, mechanical models have been developed in Abacus software to study different parameters involved in the stranding and compacting process to determine the actual conductor shape, strands actual deformations, residual stresses and contact pressure, etc. The deformed geometries were exported to COMSOL Multi-physics software using ECAD IMPORT module. DC simulations were, then, performed to analyze the electrical resistance of the conductor. Finally, the results obtained by simulation have been compared to the measurements to determine the accuracy of the models.
Pulsed eddy current characterization of local wall-thinning
Authors: Cheng Weiying
Published: December 2018

Pulsed eddy current testing was carried out to inspect wall thinning. An excitation coil with a relatively small footprint was developed and used. An algorithm based on convolution and deconvolution operations was established to evaluate local wall-thinning.
Development of vibration control device with changeable spring constant spring
Authors: Murakami Iwanori , Matsumoto Shunya , Tomaru Keiya , Ando Yoshinori , Yamada Kou
Published: December 2018

Springs are used for various purposes, particularly for vibration control and the removal of machines. However, the use of a spring generates high amplitude at the resonance point; therefore, it is difficult to eradicate vibration from all frequency bands. To solve this issue, the variable rate spring was developed, which is composed of a magnetic spring. This variable rate spring can change the spring constant. Basically, the natural frequency of the vibration system fluctuates with changes in the spring constant. As a result, the problem can effectively be resolved by changing the resonance point and eradicating the vibration. The variable rate spring is composed of a magnetic spring and a compression spring; the utility of this spring was verified by an experiment.
Thermoanalysis of the permanent magnet rotor of the microturbine generator
Authors: Cheng Wenjie , Geng Haipeng , Sun Yanhua , Yang Lihua , Yu Lie
Published: December 2018

To evaluate the rotor temperature field of a high speed permanent magnet synchronous generator (PMSG), an electromagnetic-eddy current-thermal coupled field model is constructed using 2D Time-stepping Finite-Element-Method(FEM). In the model, the electromagnetic field and the temperature field have the same meshed grids to make a node-to-node data transmission and are solved independently. The data transmission ensures the coupling of the fields and the solve order of these fields is controlled by an external program. Temperature-dependent parameters, for example conductivity, can be set in the model. Windage loss of the rotor calculated by empirical formulas is loaded to the temperature field. Distribution of the rotor temperature is obtained by a calculation example of a 100 kW, 45000 r/min microturbine generator. Experimental data are used to show the validity of the proposed model which is helpful to the thermal design of the high speed PM generator.
Enhancement of the signal strength for longitudinal guided wave sensors using the magnetic concentrator
Authors: Sun Pengfei , Wu Xinjun , Xu Jiang
Published: December 2018

For the ultrasonic guided wave testing technology based on the magnetostriction effect, the structure of the sensor has a significant influence on its detectability. A structure for enhancing the received signal strength by encircling a magnetic concentrator around the coil is studied in this work. Based on theoretical analysis, influences of the magnetic permeability of the magnetic concentrator and the electrical conductivity on the signal strength are analyzed. Experiments are presented to verify the analysis.
Analytic investigation on commutation angle of brushless DC motors with 120° voltage source inverter
Authors: Wei Yanyu , Xu Yongxiang , Zou Jibin , Liu Kai , Wang Hao
Published: December 2018

Commutation angle is a key design criterion when brushless DC (BLDC) motors sensorlessly operate based on the detection of back electromotive force(EMF) zero-crossing and must be designed significantly less than 30 electrical degree. The paper describes a detailed investigation on the commutation angle of brushless DC motors with 120° voltage source inverter. Analytic method is applied to analyze the influence factors. The proposed design principles can provide a clear guide for the adjustment of system parameters. Then two criteria and an estimation method based on approximate anlytical solution of commutation angle are presented with experimental validation.
Characteristic analysis of two-degree-of- freedom cylindrical actuator
Authors: Mori Masaki , Kitagawa Wataru , Takeshita Takaharu
Published: December 2018

This paper presents the characteristic analysis of the two-degree-of-freedom cylindrical actuator that can move in rotary and linear direction. The actuator uses the permanent magnet that is magnetized in axial direction so that the polarity in rotary and linear direction is generated alternately. When the rotary coil or the linear coil is excited, the mover moves by the principles of PMSM or PMLSM, respectively. As a result, the torque and the thrust are almost out of interference. It was confirmed that the actuator can move in rotary and linear motion independently. Moreover, the iron loss of the mover is smaller than that of the stator in rotary and linear motion, and the hysteresis loss is much larger than the eddy current loss.
Development of an improved version of sample holder for measuring the shielding effectiveness of planar films
Authors: Desideri Daniele , Cavallin Tommaso , Maschio Alvise
Published: December 2018

An improved version of a coaxial sample holder with continuous inner conductor for measuring the shielding effectiveness of planar films is presented. Keeping the design idea of the previously realized version of inner conductor split in two parts that are screwed on the sample under test, new aspects are: presence of tapered transitions, compact realization, and overall small size (total length less than 150 mm; maximum diameter of the cylindrical device of 48 mm). The theoretical only TEM mode maximum frequency is about 5 GHz. The assembly of the device is easy, as it is the sample preparation. Experimental data have been get in the range 0.1 MHz–3 GHz by using a vector network analyzer. The reliability of the system has been proved by using, as reference samples, copper and aluminium thin films deposited by DC magnetron sputtering on kapton substrates. Films with different thicknesses have been prepared, with values around a few hundreds of nanometers, as measured by using a surface profiler. The shielding effectiveness experimental data of the used reference samples are reported and are well in agreement with the theoretical values.
Absorbing coating thickness measurement based on lift-off effect of eddy current testing
Authors: Cheng Yuhua , Chen Yifan , Jiang Jixiang , Bai Libing , Zhang Bing
Published: December 2018

According to the lift-off effect of eddy current testing, a ferromagnetic absorbing coating thickness gauge was proposed in this paper. After comparison, hyperbolic regression model was adopted to estimate the relationship between the detecting coil impedance and the absorbing coating thickness. An efficient probe with high quality factor and temperature compensation was developed. At the same time, a novel and more flexible calibration method was designed in this paper to improve the measurement accuracy. The experimental results show that the thickness measurement error is less than 0.02 mm, which proves the validity of this absorbing coating thickness gauge.
PM magnetization characteristic analysis of a post-assembly LSPMM using coupled preisach modeling and FEM
Authors: Lee Jung Ho , Kim Young Hyun
Published: December 2018

This paper deals with characteristics evaluations for PM magnetization with a stator coil in a post-assembly Line Start Permanent Magnet Motor (LSPMM), using a coupled Finite Element Method (FEM) and Preisach modeling. The focus of this paper is characteristics analysis, relative to magnetizing direction and the quantity of permanent magnets due to eddy currents which occurr in the rotor bar during post-assembly magnetization and which effect Nd-Fe-B magnets.
Dynamic analysis of a ferromagnetic structure in strong magnetic field with electromagneto-mechanical coupling
Authors: Yuan Zhensheng , Li Weixin , Pei Cuixiang , Wu Wenjing , Chen Zhenmao
Published: December 2018

In this paper, a numerical method is proposed for simulating dynamic response of a ferromagnetic structure immersed in a strong magnetic field aiming at applications to the in vessel Tokamak structure of RAFM steel. The magnetic damping coupling effect and the magnetic stiffness coupling effect are considered in the numerical simulation. For simple, the static magnetic field is supposed very strong and the material is considered saturated in this work, i.e., the material is of air permeability but with a strong residual magnetization. To demonstrate the validity of the numerical method, the dynamic response of a ferromagnetic plate immersed in a transient transverse magnetic field with in-plane magnetic field component is simulated with the developed numerical code and compared with the simulated results with ANSYS. The good consistency of numerical results and simulation results demonstrated the validity of the proposed method and the corresponding numerical code.
The finite element analysis and parameter optimization of the axial flux variable- reluctance resolver with short pitch distributed winding
Authors: Wang Hao , Shang Jing , Li Yong , Xu Yongxiang
Published: December 2018

Electrical error which contains amplitude error, function error and zero error has a direct impact on accuracy of resolver when resolver is used as a angle measuring device in control system. Harmonic interference existing in the output electromotive force (EMF) of signal windings is the main influencing factor of function error. Therefore, the reduction of harmonic interference will greatly weaken function error. In this paper, an axial flux variable-reluctance (AFVR) resolver with short pitch distributed winding is put forward on the basis of former variable-reluctance resolver. By the analyses of finite element method (FEM), high order harmonic of output EMF makes the distortion of EMF waveform and causes errors. Furthermore, the change regulation of high harmonics in the output EMF is got. The optimization analysis is done to rotor shape, pole-pairs and each group teeth number of this new resolver. Through FEM analysis and discussion on the optimized AFVR resolver, the analytic results show that the influence of harmonic interference is seriously weakened, and measurement accuracy is upgraded.
A study on the impact of DSS electromagnetic properties changes caused by a sigma phase on an eddy current transducer pick-up signal
Authors: Psuj Grzegorz , Chady Tomasz
Published: December 2018

Different phases which exist in a duplex stainless steel (DSS) affect mechanical as well as electromagnetic properties. Therefore, an eddy current (EC) technique can be utilized to detect phases inclusions. In order to evaluate and identify the amount of deleterious phases it is important to assess the impact of electromagnetic properties of material on a measuring signal. This paper presents a study on the influence of DSS properties changes caused by a sigma (σ) phase on signal measured by an EC transducer. The results of an analytical and numerical analysis are presented. The analytical modeling allows to identify the electromagnetic properties and evaluate the amount of σ phase in the tested material.
Mass measurement of grasped object with tweezers employing bimorph piezoelectric actuators
Authors: Furutani Katsushi , Sakata Atsushi
Published: December 2018

This paper deals with tweezers for a mass detection during micromanipulation. It measures 52 mm × 30 mm × 10 mm and weighs 37 g. Each finger consists of a bimorph piezoelectric actuator with a stainless steel tip. One of the tweezers working as a vibrator was oscillated at its resonance frequency, and another working as a grasper opened and closed the gap between the tips of the bimorph piezoelectric actuators. The simulation model that represents the contact of two beams and a lumped mass as springs was described. The resonance frequency was increased when the tweezers grasped an object. The relationship between the mass of the object and frequency was obtained experimentally. Because the charge generated by the piezoelectric effect also affected the resonance frequency, the frequency change in the experiments was smaller than that in the simulation.
Comparative investigation of permanent magnet linear oscillatory actuators used in orbital friction vibration machine
Authors: Xu Fei , Hu Jianhui , Zou Jibin , Li Yong , Xu Yongxiang , Fan Hua
Published: December 2018

The paper describes the alternative designs and performances of a single-phase moving-magnet linear oscillating actuator (LOA) which has been developed for orbital friction welding. The influences of the pole ratio on the performance of the LOAs are investigated and the optimal parameters have been identified with reference to the thrust force characteristics. It can be illustrated that a quasi-Halbach magnetized LOA, in which the magnets are assembled on a nonmagnetic mover yoke, represents the best electromagnetic performances. Finally, the predicted thrust force-current characteristic of quasi-Halbach magnetized LOA is validated by measurements on a prototype actuator.
Frequency-domain defect characterization in pulsed eddy current testing
Authors: Zeng Zhiwei , Li Yansong , Huang Lin , Luo Minfang
Published: December 2018

Pulsed eddy current (PEC) testing has attracted researchers' interest because the pulsed excitation comprises a broad band of frequencies and the response signal provides more information about defect than traditional eddy current testing. Various features have been extracted from PEC signal for defect characterization. In this paper, we extract frequency-domain features and propose defect characterization scheme for identifying defect's location, radius, and height.
Suitability study of hybrid model of electrodynamic actuator
Authors: Jankowski Piotr , Woloszyn Miroslaw
Published: December 2018

This paper presents the proposal of the hybrid circumferential-field model of an electrodynamic actuator. The field model uses the inductor current as the input data which is obtained from the circumferential model or experimentally. The field model implemented using the FLUX program makes it possible to easily determine the pressure distribution acting on the disc. The results have been verified experimentally.
A robust optimal methodology using ant colony algorithm for inverse problems
Authors: Zhang Wei , Yang Shiyou , Bai Yanan
Published: December 2018

To develop an efficient robust optimal method for numerical solutions of inverse problems, a metaheuristic based on ant colony optimization(ACO) algorithms is proposed. In accordance to robust design specifications, the algorithm iterative procedures are redesigned, and the methodology and mechanism for reducing the heavy computational burdens associated with robust performance computations are introduced. To validate the feasibility and showcase the merits, of the proposed method, it is used to solve an engineering inverse problem with promising results.