bluuebunny/crossref_metadata_2025 huggingface dataset:
Novel fixed Z-dimension (FiZD) kidney primordia and an organoid culture system for time-lapse confocal imaging
Authors: Saarela Ulla , Akram Saad Ullah , Desgrange Audrey , Rak-Raszewska Aleksandra , Shan Jingdong , Cereghini Silvia , Ronkainen Veli-Pekka , Heikkilä Janne , Skovorodkin Ilya , Vainio Seppo J.
Published: February 2017

Tissue, organ and organoid cultures provide suitable models for developmental studies, but our understanding of how the organs are assembled at the single cell level still remains unclear. We describe here a novel Fixed Z-Dimension (FiZD) culture setup that permits high-resolution confocal imaging of organoids and embryonic tissues. In a FiZD culture a permeable membrane compresses the tissues onto a glass coverslip and the spacers adjust the thickness, enabling the tissue to grow for up to 12 days. Thus the kidney rudiment and the organoids can adjust to the limited Z-dimensional space and yet advance the process of kidney morphogenesis, enabling long-term time-lapse and high-resolution confocal imaging. Since the data quality achieved was sufficient for computer-assisted cell segmentation and analysis, the method can be used for studying morphogenesis ex vivo at the level of the single constituent cells of a complex mammalian organogenesis model system.
Ο «Νέος Ραψάκης»
Authors: Κουμαριανού Αικ.
Published: February 2017

No abstract
Ο οικονομικός μετανάστης στην πολιτική ατζέντα: η δημόσια συγκρότηση του μεταναστευτικού ζητήματος στη μεταπολίτευση
Authors: Κουντούρη Φανή
Published: February 2017

Στο άρθρο αυτό διερευνούμε τις μεταβολές τον πλαισίου ανάδειξης τον αλλοδαπού μετανάστη στην Ελλάδα κατά τη μεταπολιτευτική περίοδο. Πιο ειδικά, μελετούμε τον τρόπο με τον οποίο το μεταναστευτικό ζήτημα παρουσιάζεται ως πρόβλημα στο δημόσιο χώρο μέσα από το δημόσιο λόγο και την κοινωνική δράση, μέσα από τη δυναμική αλληλεπίδραση πολιτικών και κοινωνικών δρώντων που συγκρούονται δημόσια για τον ορισμό του. Η ανάλυση συνίσταται στην περιοδολόγηση της εξέλιξης του ορισμού του προβλήματος στη διάρκεια των τριάντα πέντε ετών της κοινωνικής του ύπαρξης: αν και το μεταναστευτικό ζήτημα τίθεται με τρόπο επιτακτικό μετά τη μαζική είσοδο μεταναστών από τις βαλκανικές χώρες, στις αρχές της δεκαετίας του 1990, οι προϋποθέσεις της κοινωνικής του συγκρότησης ανιχνεύονται ήδη στις δεκαετίες 1970 και 1980 και διαφοροποιούνται προς το τέλος της δεκαετίας του 1990. Οι αλλαγές στις κοινωνικές και πολιτικές συνθήκες μαρτυρούν τη μεταβολή των ηγεμονικών ορισμών του προβλήματος.
Η Ακροδεξιά στην Ανατολική Ευρώπη: Οι μεταμορφώσεις της, η σχέση της με τα κοινωνικά κινήματα και την Ευρωπαϊκή Ενοποίηση
Authors: Κόρδας Γεώργιος
Published: February 2017

οι έρευνες των πολιτικών επιστημόνων τις τελευταίες δεκαετίες έχουν καταλήξει στην αναγνώριση τριών εξελικτικών κυμάτων της Άκρας Δεξιάς στη Δυτική Ευρώπη (von Beyme 1988: 8-10· Γεωργιάδου 2008: 87-88, 90). Ενώ τα κύματα αυτά διαμορϕώθηκαν σε ένα σχετικά μακρύ χρονικό διάστημα έξι δεκαετιών, στην Ανατολική Ευρώπη και στα Βαλκάνια το πολιτικό σκηνικό αναδείχθηκε μετά την πτώση του κομμουνισμού κατά έναν ριζικά διαϕορετικό τρόπο. πιο συγκεκριμένα η πτώση του Τείχους του Βερολίνου το 1989 συνέβαλε στη διάχυση του εθνικισμού στη νέα πολιτική πραγματικότητα. Επιπλέον η περίοδος αυτή χαρακτηρίζεται από μια ιδιότυπη οικονομική μετάβαση, όπου οι ‘κοινωνικά χαμένοι’ αποτελούν –δυνητικά- εκλογικό κοινό για την Ακροδεξιά.
Eισαγωγή στην επιστημολογία των κοινωνικών αναπαραστάσεων και την ψυχολογία του κοινωνικού μέσω της σκέψης του Serge Moscovici
Authors: Χρηστάκης Νικόλας , Καλαμπαλίκης Νίκος
Published: February 2017

Η μελέτη των κοινωνικών αναπαραστάσεων και της κοινωνικής σκέψης αποτελεί σύμφωνα με τον Serge Moscovici θεμελιώδη αποστολή της κοινωνικής ψυχολογίας και προνομιούχο τρόπο κατανόησης κάθε συλλογικού φαινομένου. Με βάση την επιτελεστική και αμείωτα κοινωνική φύση κάθε διαδικασίας νοήματος, σκέψης και συμβολικής πρακτικής (θρησκευτικής, επιστημονικής, πολιτικής, σχεσιακής…), οι κοινωνικές αναπαραστάσεις βρίσκονται στον πυρήνα της ίδιας της κατασκευής και της εμπειρίας του κοινωνικού, της ψυχοκοινωνικής ύπαρξης και της εξέλιξης των ατομικών και συλλογικών υποκειμένων, επιτρέποντας στα πρόσωπα την καθημερινή συνύπαρξη, ανταλλαγή, επικοινωνία και δράση στις πολύπλοκες κοινωνίες μας.
Contract Commitments Accounting of Trade Organizations
Authors: Федоренко  , Fedorenko Ilya , Девяева  , Devyaeva K.
Published: February 2017

The article considers the modern problems of commitments accounting, studies various interpretations of the

concept of liabilities, gives the analysis of the existing options for the use of bookkeeping account to account for the

commitmetns of trade organizations.
Breaking bad news: a case study on communication in health care
Authors: Hemming Lynne
Published: February 2017

Breaking bad news is something most nurses will be involved with at some time in their career. Research has shown a strong relationship between communication skills and patients' understanding of their diagnosis and treatment. The specialist nurse has a central role in the support and education of patients and their families, as they are able to allocate appropriate clinic time with the patient after a consultant clinic appointment to ensure they have understood the discussion. Effective communication as well as time should be tailored to each patient, allowing trust to be built. The recognition of this has led to advanced communication courses being developed for all health professionals to take advantage of.
Story of survival
Authors: Hampshire Viv
Published: February 2017

The Road Home is a spellbinding story book about a parent and child facing a perilous journey together. Its regular rhyme pattern and entrancing illustrations will enable children to engage with its positive message.
Participantes heterogéneos en MOOCs y sus necesidades de aprendizaje adaptativo
Authors: Sein-echaluce Lacleta María Luisa , Lerís López Dolores , Hernández Miguel , Fidalgo-Blanco Ángel
Published: February 2017

En numerosos estudios se señalan la masificación y la diversidad de perfiles de los participantes en los cursos masivos abiertos online (MOOC) como las principales causas de su baja tasa de finalización. Por otra parte, las metodologías de personalización del aprendizaje,  junto a las tecnologías de la información, que permiten realizar técnicas de adaptatividad, figuran en informes internacionales como una forma eficaz de mejorar el aprendizaje. En este trabajo se explora la percepción de los participantes en MOOCs respecto a sus necesidades de adaptatividad en este tipo de cursos, así como su relación con distintos aspectos de los participantes, como sus perfiles (género, edad, ubicación geográfica y nivel académico), su experiencia previa o conocimiento sobre el tema del MOOC y su motivación para iniciar el MOOC. Se realiza el estudio a través de una encuesta cumplimentada por los participantes en el Campus MOOC de Innovación Educativa. Se concluye que la edad o género de los participantes no influye significativamente en su necesidad de técnicas adaptativas en un MOOC. Sin embargo, residir en un país de América Latina, tener una profesión de gestión o inscribirse en un MOOC con una motivación concreta son algunos de los factores que influyen en un mayor deseo de técnicas de adaptatividad en un MOOC. Los resultados obtenidos contribuirán a mejorar los diseños adaptativos de los MOOCs  y son fácilmente transferibles a cualquier curso de formación en línea, en formación semipresencial o virtual.
A influência da ferramenta digital “Google Tradutor” no processo de aprendizagem de língua inglesa
Authors: Costa Thaís Bernardes
Published: February 2017

Prensky (2001) afirma que a nova geração está habituada ao uso de tecnologias e a receber e assimilar informações rapidamente; são nomeados “nativos digitais”. A aprendizagem de língua inglesa nesse contexto digital tem se justificado, principalmente, pelo seu status de língua global e por ser um instrumento de comunicação entre diferentes culturas. Dessa maneira, propomos analisar o processo de aprendizagem de língua inglesa através da ferramenta online “Google Tradutor” por um nativo digital de uma escola municipal de Uberaba (MG). Para tal propósito, recorremos ao termo affordance (GIBSON, 1981), conceito utilizado na área de Linguística Aplicada, que diz respeito às diferentes formas como o indivíduo utiliza e percebe um ambiente.  Sendo assim, acreditamos que os ambientes online são propícios para a efetivação de diferentes affordances. Além disso, Benson (1997) afirma que ambientes extraclasse (defendemos que isso inclui a internet) contribuem para a autonomia na aprendizagem. Através de questionários e de uma entrevista com um aprendiz de língua inglesa contendo relatos de experiências com o uso dessa ferramenta, concluímos que ele percebe e efetiva diferentes affordances por meio do “Google Tradutor”. Ainda, percebemos que esse aprendiz, foco do estudo, não constitui-se um sujeito autônomo na sua aprendizagem de língua inglesa.
Living on the Edge: Inughuit Women and Geography of Contact
Authors: LeMoine Genevieve M. , Kaplan Susan A. , Darwent Christyann M.
Published: February 2017

The women of northwestern Greenland experienced contact with Euro-American men in multiple ways and in a variety of geographical contexts. Together the archaeological record and unpublished historical documents reveal the complexities of these situations and women’s responses to them. Archaeological and documentary data from two early 20th-century contact situations at Iita in northwestern Greenland and Floeberg Beach on Ellesmere Island, Nunavut, highlight the varied nature of women’s responses to contact and the ways in which interaction with newcomers affected them individually and collectively. The women’s responses varied over time and across space. They responded to both the stresses and the opportunities of contact with resilience and resistance, acceptance and rejection, depending on circumstances.
Empathising and systematising in children with and without autism spectrum disorder
Authors: Girli Alev , Karadağ Filiz , Karabey Burak
Published: February 2017

It is known that children with autism are insufficient in building empathy. A part of the difficulties in social interaction may originate from the lack of empathy. This research consists of two studies. First study is adaptation of the “Child Empathy Systemizing Quotient” (EQ-SQ) to Turkish culture which is prepared considering the behaviour characteristics of children in the Autism Spectrum Conditions (ASC) group, and realizing its validity and reliability. This research is conducted with 760 children with typical development processes, aged 9 – 16. The findings show that the Turkish EQ-SQ is a valid and reliable tool. The second study is conducted with 112 children, 32 of them having ASC and 80 not. Through this quotient, the empathy and systematizing abilities of children with ASC are compared with their peers who demonstrate typical development processes. The EQ-SQ levels of the participants are evaluated with their mothers and their demographical values are taken from the mothers. In line with the findings in the literature, the empathy skills of children diagnosed with ASC are significantly lower than children with typical development processes. Among the children with typical development processes, females’ empathy skills are shown to be significantly higher than males.
EinFach Logistik. Nauczanie niemieckiego języka logistyki – źródła inspiracji oraz nowe wyzwania dla logistyków i germanistów
Authors: Górski Karol , Janiak Tomasz
Published: February 2017

Driven by sociolinguistic inspirations, the authors make an attempt to assess the teaching of German logistics language in Poland for professional purposes against a broadly understood logistic education and emphasize the aspect of close correlation of the linguistic training outcome with the labor market demand. The intention of the authors is to highlight an important component of the education environment, namely the need to interrelate the proper content-oriented knowledge with linguistic skills of the logistic secondary school students and the university level students dealing with logistics.
Profesjolekt hotelarski w mediach na przykładzie pisma menedżerów hoteli – „Biznes Hotel”
Authors: Smól Joanna
Published: February 2017

The article presents the main features of hotel professiolect on the basis of a paper “Business Hotel”, aimed at hotel managers. The basic considerations are preceded by the introduction of the term professiolect as well as features of media messages which confront with the specificity of specialized texts. The main purpose of this article is to characterize hotel professiolect in its variety used in media, particularly at the lexical level (borrowings, professional vocabulary, acronyms) and to indicate the main semantic areas which the analyzed lexemes fall under.
DIALECTS AT THE BORDER BETWEEN KOREA AND CHINA
Authors: LEE Choonkyu
Published: February 2017

In this paper, we seek a closer comparative dialectological study of the dialects of the Democratic People’s Republic of Korea and the Korean dialects of the ethnically Korean Chinese near the Korea-China border. Accessible resources published in English and other languages besides Korean are particularly necessary in these times of increasing instability in the North Korean regime and foreseeable cases of asylum seekers. Speech samples are discussed to illustrate the relative difficulty of distinguishing between North Korean and Korean-Chinese speakers, compared to distinguishing between North Korean and South Korean speakers. Based on an over-view of previous literature, some guidelines are developed for identifying some distinguishing characteristics of these speech communities. Continuing dialectological research with refugees and field research making direct comparisons between these communities are necessary for further and up-to-date insight.
Chopinowski impuls. Dzienniki Stefana Żeromskiego wobec twórczości Fryderyka Chopina
Authors: Karpińska Karolina
Published: February 2017

The article Chopin’s impulse. Stefan Żeromski’s „Diaries” versus Fryderyk Chopin’s output shows writer’s fascination for Fryderyk Chopin and his work. The main emphasis is put on the strength of influence of particular elements of composition on the neurotic system of Stefan Żeromski. Besides, it touches upon the synthesis of arts which the artist often referred to in his Diaries.
Zasada proporcjonalności a podatkowe ograniczenia swobód rynku wewnętrznego Unii Europejskiej
Authors: Lipniewicz Rafał
Published: February 2017

Integracja europejska obejmuje wiele obszarów społeczno-gospodarczych, a jednym z nich są systemy podatkowe państw członkowskich. Harmonizacji poddano podatki pośrednie, natomiast podatki bezpośrednie pozostają nadal domeną państw członkowskich. Autonomia w dziedzinie opodatkowania bezpośredniego nie oznacza jednak pełnej suwerenności. Państwa członkowskie muszą brać pod uwagę fundamentalne swobody rynku wewnętrznego, których ograniczanie regulacjami podatkowymi oceniane być powinno w świetle zasady proporcjonalności.
Efficacy of Phytogenic Feed Additive on Performance, Production and Health Status of Monogastric Animals – A Review
Authors: Upadhaya Santi Devi , Kim In Ho
Published: February 2017

The growing concerns of consumers on the use of antibiotic as a growth promoter in livestock feed have fueled the interest in alternative products. In the recent years a group of natural products known as phytogenics has been a focus of several studies. Phytogenics are a heterogeneous group of feed additives originating from plants and consist of herbs, spices, fruit, and other plant parts. These feed additives are reported to have a wide range of activities including antimicrobial, anthelminthic, antioxidant, growth enhancer, and immune modulator. Besides these properties they are also reported to stimulate feed intake and endogenous secretion and enhance production. They include many different bio-active ingredients such as alkaloids, bitters, flavonoids, glycosides, mucilage, saponins, tannins phenolics, polyphenols, terpenoids, polypeptide, thymol, cineole, linalool, anethole, allicin, capsaicin, allylisothiocyanate, and piperine. These feed additives have been tested in the form of extracts, cold pressed oils, essential oils in a number of animals but the results are variable. Therefore, their application as feed additive has been limited, largely owing to their inconsistent efficacy and lack of full understanding of the modes of action. The future of these feed additives depend on the characteristics of herbs, the knowledge on their major and minor constituents, the in-depth knowledge on their mode of action and their value based on the safety to animal and their products. The aim of this review is to summarize on the current knowledge on the use of phytogenic as a feed additive in monogastric animals.
Differential expression of miR-145, miR-429 and its target genes in partial reproductive tissues of swine with high and low litter size
Authors: Zhang Xiao-Dong , Feng Yi-Fang , Zhang Xu , Tian Mi , Wu Tao , Ye Peng-Fei , Zhang Wei , Ding Yue-Yun , Yin Zong-Jun , Chu Ming-Xing
Published: February 2017

To justify the function of miRNAs in reproductive regulation in swine, the expression of miR-145, miR-429 and their related genes were studied in reproductive tissues of sows. Wannan black pig and Yorkshire pigs with extremely high (n=6) and low (n=6) litter size were sampled, and real-time quantitative PCR (qPCR) was performed on tissue samples from ovaries, uterus, oviduct, hypothalamus, and pituitary. The results indicated that miR-145, miR-429, and zinc finger E-box binding homeobox 1 gene (ZEB1) were expressed significantly different in Wannan black pig and Yorkshire pigs. In pigs with different fecundity, miR-145 in the uterus was expressed significantly lower in pigs with high litter size, than in pigs with low litter size. The miR-429 expression in the oviduct and pituitary of pigs with high litter size was significantly higher compared with tissues sampled from pigs with low litter size. The ZEB1 expression in the pituitary was lower in pigs with high litter size in comparison to pigs with low litter size, while luteinizing hormone beta subunit (LHβ) showed the opposite pattern of expression. In conclusion, miR-145 and miR-429 were differently expressed in pigs with high and low litter size and might have a role in affecting litter size of sows.
Effect of temperament on performance of primiparous dairy cows
Authors: Sawa Anna , Bogucki Mariusz , Neja Wojciech , Krężel-Czopek Sylwia
Published: February 2017

This study was designed to analyse the effect of milking behaviour (temperament) of primiparous dairy cows on their milk and reproductive performance as well as survival to the second lactation. Milk performance, reproductive performance and culling data on 12028 Polish Holstein-Friesian primiparous dairy cows were acquired from the SYMLEK database. Using the methodology of the Polish Federation of Cattle Breeders and Dairy Farmers, the temperament of the cows was assessed as: 1 - calm, 2 - normal, 3 - excitable or aggressive. Primiparous cows from the analysed population were characterized by averagely normal temperament and optimal milking speed. Daily and lactation yield depended (P≤0.01) on the temperament of cows. Excitable (aggressive) cows had higher daily and lactation yield compared to normal and calm cows. The temperament trait was found to correlate (P≤0.01) also with functional traits such as milking speed, survival to the second lactation, and culling level. As milking speed increased, the proportion of cows with calm temperament decreased and that of excitable (aggressive) primiparous cows increased. As the temperament score increased, so did the proportion of primiparous cows sold for further breeding. Excitable (aggressive) primiparous cows had the lowest chance of survival to the second calving.
Comparative response of IgA and IgG activity and hematological parameters among four main beef-cattle breeds infected with gastrointestinal nematodes in the warm humid tropic of Mexico
Authors: González-Garduño Roberto , López Arellano María E. , Mendoza de Gives Pedro , García Javier Arece , Marie-Magdeleine Carine , Hernández Glafiro Torres , Hernández Jorge Oliva , Hinojosa-Cuéllar J. Alfonso
Published: February 2017

This study determined the immunoglobulin (A and G) activity against gastrointestinal nematodes (GIN) and also the hematological parameters in four beef-calf breeds naturally infected in a tropical region of Mexico. Thirty-six infected calves were used to determine the fecal nematode egg counts (FEC), the IgA and IgG activity in serum and saliva, the packed cell volume (PCV), the plasmatic protein (PP) and the differential leukocyte counts. These parameters were measured for a five-month period. ELISA assay was performed using adult worm crude antigen (AWCA) from Haemonchus contortus, Trichostrongylus colubriformis, Mecistocirrus digitatus and Cooperia punctata. The variables were analyzed using a fixed model according to the breed group. The FEC records (means ± standard deviation) for the different breeds were: Brangus (122±115), Charolais (391±507), Guzerat (294±326) and Brown Swiss (413±395). No statistical differences (P>0.05) were found among breeds. Cooperia and Haemonchus were the main identified genera in the coprocultures. Differences in hematological parameters were observed among breeds (P<0.01); Guzerat showed the highest PCV (42.6±4.7%). The lowest leukocyte counts were observed in the Charolais breed (9.2±2.4 × 109 cells L-1). Differences between Guzerat and Charolais were only detected in eosinophils, neutrophils and lymphocytes. Increased activity of IgA was observed against M. digitatus (21% OD) compared with the response against C. punctata in serum samples (13% OD). The lowest IgA activity in serum and saliva was found in Guzerat calves. Charolais and Brown Swiss showed the highest IgA activity in serum and the highest value in saliva was found in Brangus.
Rye non-starch polysaccharides: their impact on poultry intestinal physiology, nutrients digestibility and performance indices – a review
Authors: Bederska-Łojewska Dorota , Świątkiewicz Sylwester , Arczewska-Włosek Anna , Schwarz Tomasz
Published: February 2017

A high content of non-starch polysaccharides (NSP), namely arabinoxylans (AX), in rye is a reason for the potential adverse effect of this grain on intestinal functions, gut microflora, absorption of nutrients and performance indices. As such, the use of rye grain in intensively produced poultry diets is limited. However, recently developed new types of hybrid rye are characterised not only by increased yield potential, resistance to fungus and pests and low production costs, but also the content of antinutritive substances may be reduced in these varieties. The aim of this paper is to discuss the mechanisms of NSP effects in the digestive tract, as well as to review the results of recent studies on the use of rye in poultry nutrition. Based on the literature data, it can be concluded that the use of new hybrid rye varieties with decreased NSP concentration and NSP-hydrolising enzymes may be a way of increasing the share of rye grain in poultry diets.
Radio Interferometric Research of Ionosphere by Signals of Space Satellites
Authors: Dugin N. , Antipenko A. , Bezrukovs V. , Gavrilenko V. , Dementjev A. , Lesins A. , Nechaeva M. , Shmeld I. , Snegirev S. , Tikhomirov Yu. , Trokss J.
Published: February 2017

Since 2012, the Radiophysical Research Institute and the Lobachevsky State University at Nizhny Novgorod, Russia and the Ventspils International Radio Astronomy Centre at Irbene, Latvia are making radio interferometric experiments on study of ionosphere parameters in a quiet (natural) state of medium and research of artificial turbulence of the ionosphere, heated by the emission from the SURA facility. Remote diagnostics of the ionosphere is implemented using a method of radio sounding by signals of navigation satellites in combination with the Very Long Baseline Interferometry (VLBI) method. As a result of spectral and correlation analysis, interferometric responses of the two-element (RRI–UNN) and three-element (RRI–UNN–Irbene) interferometers were received by observations of 12 satellites of the navigation systems GLONASS and GPS. Here the first results are reported.
On the Spectrum of Extremely Metal-Poor Star HD 52961
Authors: Kipper Tõnu
Published: February 2017

High resolution spectra of the extremely metal-poor star HD 52961 are investigated. The atmospheric parameters found are: T
eff = 6000 ± 100 K, log g = 0.5±0.5, ξ
t = 6.8 km s−1, [Fe/H] = −4.50±0.20. The carbon abundance is close to the solar one, [C/H] = −0.17±0.12. At the same time abundances of heavy refractory elements are very low. The chemical composition and atmospheric parameters have not changed compared to the first observations of the star about 20 years ago, contrary to expectation of dissolving the peculiarities by mass-loss during a relatively short time. We also find evidence of ongoing mass-loss in this post-AGB star with a rate of Ṁ ≈ 5 · 10−6
M
⊙ yr−1.
Pulsation of IU Per from the Ground-based and ‘Integral’ Photometry
Authors: Kundra E. , Hric L. , Gális R.
Published: February 2017

IU Per is an eclipsing semi-detached binary with a pulsating component. Using our own ground-based, as well as INTEGRAL satellite photometric observations in the B and V passbands, we derived geometrical and physical parameters of this system. We detected the short-term variations of IU Per in the residuals of brightness after the subtraction of synthetic light curves. Analysis of these residuals enabled us to characterize and localize the source of short-term variations as the pulsations of the primary component typical to δ Scuti-type stars.
Environmental Dependence of Different Colors for the Apparent Magnitude-Limited Main Galaxy Sample of the SDSS DR7
Authors: Deng Xin-Fa , Luo Cheng-Hong , Xin Yong , Wu Ping
Published: February 2017

The apparent magnitude-limited Main galaxy sample of the Sloan Digital Sky Survey Data Release 7 is used to investigate the environmental dependence of u–r, u–g, g–r, r–i and i–z colors. All the five colors strongly correlate with the local environment: red galaxies tend to be located in dense regions, while blue galaxies tend to be located in low density regions. We also note that with increasing of redshift, the environmental dependence of galaxy colors becomes weaker, especially in the high redshift region (z between 0.17 and 0.20). This can be explained accepting that subsamples with high redshifts contain only luminous and red galaxies.
New Methods in Modeling of Hot Stellar Atmospheres
Authors: Sapar A. , Poolamäe R. , Sapar L.
Published: February 2017

In the present study we had three main aims. First to study the possibility of reducing the initial model atmosphere data to short analytical polynomials. The second was to use as the depth variable the logarithm of the local gas pressure instead the Rosseland mean. The third aim was to check the applicability of the derived formulae and proposed computation methods to obtain high precision self-consistent results in modeling hot plane-parallel stellar atmospheres. Introducing the dimensionless (reduced) local quantities θ = T/T
eff and β = P/P(T
eff) it has been shown that for hot convection-free stellar atmospheres the curves log θ versus log β reduce an initial grid of models to simple polynomials and bring forth some general features of the model stellar atmospheres. Even for stellar atmospheres having the convective zones in the deeper atmospheric layers, the outer part of the atmosphere (up to T = T
eff and for T
eff > 5000 K) can be described in the same manner by curves log θ versus log β as for the hotter stars. Iterative modeling of any hot stellar atmosphere can be started from these formulae (obtained for solar abundances), using rational polynomial ratios for P(T
eff), obtaining from these data the needed T versus P dependence. To check suitability of the formulae, the iterative correction of the model stellar atmospheres has been carried out by the traditional Unsöld-Lucy method and by the novel least squares optimization based on Levenberg-Marquardt method, followed by Broyden correction loop. It has been shown that the flux constancy obtained by it is almost 2 dex higher than obtained by the Unsöld-Lucy method. The precision estimators as criteria of the modeling algorithms self-consistency and of the computational precision level have been proposed and used.
Seven-Color Photometry and Classification of Stars in the Vicinity of the Emission Nebula Sh2-205
Authors: Čepas V. , Zdanavičius J. , Zdanavičius K. , Straižys V. , Laugalys V.
Published: February 2017

We present the results of CCD photometry in the seven-color Vilnius system for 922 stars down to V ~ 17 mag in a 1.5 square degree field at the northern edge of the HII region Sh2-205, at the Perseus and Camelopardalis border. Using the intrinsic color indices and photometric reddening-free Q-parameters, two-dimensional spectral types for most stars are determined.
How does the Structure of Spherical Dark Matter Haloes Affect the Types of Orbits in Disk Galaxies?
Authors: Zotos Euaggelos E.
Published: February 2017

The main objective of this work is to determine the character of orbits of stars moving in the meridional (
How does the Mass Transport in Disk Galaxy Models Influence the Character of Orbits?
Authors: Zotos Euaggelos E.
Published: February 2017

We explore the regular or chaotic nature of orbits of stars moving in the meridional (R, z) plane of an axially symmetric time-dependent disk galaxy model with a central, spherically symmetric nucleus. In particular, mass is linearly transported from the disk to the galactic nucleus, in order to mimic, in a way, the case of self-consistent interactions of an actual N-body simulation. We thus try to unveil the influence of this mass transportation on the different families of orbits of stars by monitoring how the percentage of chaotic orbits, as well as the percentages of orbits of the main regular resonant families, evolve as the galaxy develops a dense and massive nucleus in its core. The SALI method is applied to samples of orbits in order to distinguish safely between ordered and chaotic motion. In addition, a method based on the concept of spectral dynamics is used for identifying the various families of regular orbits and also for recognizing the secondary resonances that bifurcate from them. Our computations strongly suggest that the amount of the observed chaos is substantially increased as the nucleus becomes more massive. Furthermore, extensive numerical calculations indicate that there are orbits which change their nature from regular to chaotic and vice versa and also orbits which maintain their orbital character during the galactic evolution. The present outcomes are compared to earlier related work.
Improvements in the Spherical Collapse Model and Dark Energy Cosmologies
Authors: Del Popolo A.
Published: February 2017

In the present paper, we study how the effects of deviations from spherical symmetry of a system, produced by angular momentum, and shear stress, influence typical parameters of the spherical collapse model, like the linear density threshold for collapse of the non-relativistic component (δc) and its virial overdensity (ΔV). The study is performed in the framework of the Einstein-de Sitter and ΛCDM models, and assuming that the vacuum component is not clustering within the homogeneous non-spherical overdensities. We start from the standard spherical top hat model (SCM) which does not take account the non-spherical effects, and we add to this model the shear term and angular momentum term, which are finally expressed in terms of the density contrast,δ. We find that the non-spherical terms change the non-linear evolution of the system and that the collapse stops “naturally” at the virial radius, differently from the standard spherical collapse model. Moreover, shear and rotation gives rise to higher values of the linear overdensity parameter and different values of ΔVwith respect to the standard spherical collapse model.
Stochastic 2-D Models of Galaxy Disk Evolution. The Galaxy M33
Authors: Mineikis T. , Vansevičius V.
Published: February 2017

We have developed a fast numerical 2-D model of galaxy disk evolution (resolved along the galaxy radius and azimuth) by adopting a scheme of parameterized stochastic self-propagating star formation. We explore the parameter space of the model and demonstrate its capability to reproduce 1-D radial profiles of the galaxy M33: gas surface density, surface brightness in the i and GALEX FUV passbands, and metallicity.
Outer Rings in Early-type Galaxies: From Vorontsov-Velyaminov to Present
Authors: Silchenko O. , Ilyina M. , Katkov I.
Published: February 2017

‘Ringed galaxies’, or disk galaxies with prominent outer ring structures, separated visually from the main galactic bodies, were discovered and intensively studied by B. A. Vorontsov-Vel’yaminov whose 110th anniversary is celebrated this year. We discuss progress reached during recent years in understanding outer ring structures of disk galaxies, in particular, the results of our spectroscopic studies on the ring gas kinematics, excitation and chemical composition.
On the Formation of Tails in the Galactic Tidal Field
Authors: Davydenko A.
Published: February 2017

The trajectories of stars of a cluster moving in the Schuster-Plummer potential on a circular orbit in the Galactic plane (Bok’s problem) are investigated. The impact of initial conditions on stellar motions, in particular on the possibility of escape of a star from the cluster, is analyzed, and numerous computations of stellar orbits are performed for various initial values of energy and momentum with respect to the cluster. Stars escaping from the cluster are shown to move mostly in spiral orbits and form well-defined spiral tails.
On the Possibility of Applying the Quasi-Isothermal Stäckel’s Model to Our Galaxy
Authors: Gromov A. O. , Nikiforov I. I. , Ossipkov L. P.
Published: February 2017

An earlier derived quasi-isothermal Stäckel’s model of mass distribution in stellar systems and the corresponding formula for space density are applied to our Galaxy. The model rotation curve is fitted to HI kinematical data. The structural and scale parameters of the model are estimated and the corresponding density contours for our Galaxy are presented.
The Evolution of a Supermassive Retrograde Binary Embedded in an Accretion Disk
Authors: Ivanov P. B. , Papaloizou J. C. B. , Paardekooper S.-J. , Polnarev A. G.
Published: February 2017

In this note we discuss the main results of a study of a massive binary with unequal mass ratio, q, embedded in an accretion disk, with its orbital rotation being opposed to that of the disk. When the mass ratio is sufficiently large, a gap opens in the disk, but the mechanism of gap formation is very different from the prograde case. Inward migration occurs on a timescale of t
ev ~ M
p/Ṁ, where M
p is the mass of the less massive component (the perturber), and Ṁ is the accretion rate. When q ≪ 1, the accretion takes place mostly onto the more massive component, with the accretion rate onto the perturber being smaller than, or of order of, q
1/3
Ṁ. However, this rate increases when supermassive binary black holes are considered and gravitational wave emission is important. We estimate a typical duration of time for which the accretion onto the perturber and gravitational waves could be detected.
On the Pseudo Phase-space Density of Dark Matter Haloes and the Universality of Density Profiles
Authors: Del Popolo A.
Published: February 2017

We examine the radial dependence of the pseudo phase-space density,ρ(r)/σ3(r), for structures on galactic and galaxy cluster scales. We find that it is approximately a power-law only in the range of halo radius resolved by current simulations (down to 0.1% of the virial radius) while it has a non-power law behavior below the quoted scale, with inner profiles changing with mass. The non-power-law behavior is more evident for halos constituted of both dark matter and baryons, while halos constituted just of dark matter are characterized by an approximately power-law behavior. The results argue against universality of the pseudo phase-space density and, as a consequence, argue against universality of density profiles constituted of dark matter and baryons as also discussed in Del Popolo (2009).
Baryon Physics and the Missing Satellites Problem
Authors: Del Popolo A.
Published: February 2017

In the present paper, we combine the model of Del Popolo (2009) with the models dealing with tidal stripping, tidal heating, and photo-heating to study how baryon physics can solve the missing satellite problem (MSP) and the too-big-to-fail (TBTF) problem. Applying to the Via Lactea II (VL2) subhaloes a series of corrections similar to those of Brooks et al. (2013), namely, a Zolotov et al. (2012)-like correction obtained with our model, and further correcting for the UV heating and tidal stripping, we find that the number of massive and luminous satellites is in agreement with that number observed in the Milky Way. In conclusion, baryon physics is of fundamental importance in solving the ΛCDM small scale problems.
On the Possibility of Determining the Distance to the Galactic Center from the Geometry of Spiral Arm Segments
Authors: Nikiforov I. I. , Veselova A. V.
Published: February 2017

A new approach to determining the solar galactocentric distance,
Databases of Publications and Observations as a Part of the Crimean Astronomical Virtual Observatory
Authors: Shlyapnikov A. , Bondar’ N. , Gorbunov M.
Published: February 2017

We describe the main principles of formation of databases (DBs) with information about astronomical objects and their physical characteristics derived from observations obtained at the Crimean Astrophysical Observatory (CrAO) and published in the “Izvestiya of the CrAO” and elsewhere. Emphasis is placed on the DBs missing from the most complete global library of catalogs and data tables, VizieR (supported by the Center of Astronomical Data, Strasbourg). We specially consider the problem of forming a digital archive of observational data obtained at the CrAO as an interactive DB related to database objects and publications. We present examples of all our DBs as elements integrated into the Crimean Astronomical Virtual Observatory. We illustrate the work with the CrAO DBs using tools of the International Virtual Observatory: Aladin, VOPlot, VOSpec, in conjunction with the VizieR and Simbad DBs.
Assessing Quality of City Development by the Acquired Criteria of Landscape Urbanism
Authors: Stauskis Gintaras , Deveikienė Vaiva
Published: February 2017

We may see modern urbanism as a collection of many successful developments as well as a series of endless mistakes and repeated failures. The paper focuses on the analysis of existing and former urban planning and design patterns in aspect of efficiency of applied methods to achieve higher quality referring to the philosophy and practice of Landscape Urbanism. The Missionaries Block in Vilnius City serves as a case study for assessing its development in three distinguishable periods by the set of quality criteria derived from Landscape Urbanism theories and practices. The assessment results disclose an evident drop in the overall quality of the selected site’s development in the recent period. The paper discusses if and how one may use the method employed hereby for programming and shaping the future regeneration and redevelopment of existing urban setting.
Structure of hydrophobic core in plant carboxylesterase
Authors: Banach Mateusz , Konieczny Leszek , Wiśniowski Zdzisław , Roterman Irena
Published: February 2017

The fuzzy oil drop model was applied to characterize the hydrophobic core structure in plant carboxylesterase. The characteristics revealed the status of β-sheets in the central part of the molecule as discordant as opposed to the expected hydrophobicity distribution. Particularly, the β-strands and helices in close proximity to the enzymatic residues recognized as discordant with respect to the ideal hydrophobicity distribution of hydrophobic core are of high importance. It is assumed that this local irregularity is the form of coding the specificity of enzymes. The protein under consideration appears to be the next example proving this assumption.
Automatic sleep stage classification of single-channel EEG by using complex-valued convolutional neural network
Authors: Zhang Junming , Wu Yan
Published: February 2017

Many systems are developed for automatic sleep stage classification. However, nearly all models are based on handcrafted features. Because of the large feature space, there are so many features that feature selection should be used. Meanwhile, designing handcrafted features is a difficult and time-consuming task because the feature designing needs domain knowledge of experienced experts. Results vary when different sets of features are chosen to identify sleep stages. Additionally, many features that we may be unaware of exist. However, these features may be important for sleep stage classification. Therefore, a new sleep stage classification system, which is based on the complex-valued convolutional neural network (CCNN), is proposed in this study. Unlike the existing sleep stage methods, our method can automatically extract features from raw electroencephalography data and then classify sleep stage based on the learned features. Additionally, we also prove that the decision boundaries for the real and imaginary parts of a complex-valued convolutional neuron intersect orthogonally. The classification performances of handcrafted features are compared with those of learned features via CCNN. Experimental results show that the proposed method is comparable to the existing methods. CCNN obtains a better classification performance and considerably faster convergence speed than convolutional neural network. Experimental results also show that the proposed method is a useful decision-support tool for automatic sleep stage classification.
Morphology and surface topography of Ti6Al4V lattice structure fabricated by selective laser sintering
Authors: Maszybrocka J. , Stwora A. , Gapiński B. , Skrabalak G. , Karolus M.
Published: February 2017

Construction of metallic implants with a porous structure that mimics the biomechanical properties of bone is one of the challenges of orthopedic regenerative medicine. The selective laser sintering technique (SLS) allows the production of complex geometries based on three-dimensional model, which offers the prospect of preparing porous metal implants, in which stiffness and porosity can be precisely adjusted to the individual needs of the patient. This requires an interdisciplinary approach to design, manufacturing and testing of porous structures manufactured by selective sintering. An important link in this process is the ability to assess the surface topography of the struts of porous structure. The paper presents a qualitative assessment of the surface morphology based on SEM studies and methodology that allows for quantitative assessment of stereometric structure based on micro-tomographic measurements.
Analytical and experimental determination of the parasitic parameters in high-frequency inductor
Authors: Zdanowski M. , Barlik R.
Published: February 2017

The paper presents the results of calculations, simulations, and measurements of parasitic capacitance of winding in ferrite inductor suitable for cooperating with 2 kW DC-DC boost converter built using SiC JFET transistors, operating with a switching frequency of 100 kHz. The inductor winding is made of litz wire in a two-layer configuration. The lumped model of inductor winding was adopted. The results of analytical calculations have been compared with the results obtained from experimental investigations based on the resonance effect.
Multimodal face recognition method with two-dimensional hidden Markov model
Authors: Bobulski J.
Published: February 2017

The paper presents a new solution for the face recognition based on two-dimensional hidden Markov models. The traditional HMM uses one-dimensional data vectors, which is a drawback in the case of 2D and 3D image processing, because part of the information is lost during the conversion to one-dimensional features vector. The paper presents a concept of the full ergodic 2DHMM, which can be used in 2D and 3D face recognition. The experimental results demonstrate that the system based on two dimensional hidden Markov models is able to achieve a good recognition rate for 2D, 3D and multimodal (2D+3D) face images recognition, and is faster than ICP method.
A review of the challenge in measuring and standardizing BCR-ABL1
Authors: Yu Shuping , Cui Ming , He Xiao , Jing Rongrong , Wang Huimin
Published: February 2017

Breakpoint cluster region-Abelson (
High-dose biotin therapy leading to false biochemical endocrine profiles: validation of a simple method to overcome biotin interference
Authors: Piketty Marie-Liesse , Prie Dominique , Sedel Frederic , Bernard Delphine , Hercend Claude , Chanson Philippe , Souberbielle Jean-Claude
Published: February 2017

Background:

High-dose biotin therapy is beneficial in progressive multiple sclerosis (MS) and is expected to be adopted by a large number of patients. Biotin therapy leads to analytical interference in many immunoassays that utilize streptavidin-biotin capture techniques, yielding skewed results that can mimic various endocrine disorders. We aimed at exploring this interference, to be able to remove biotin and avoid misleading results.

Methods:

We measured free triiodothyronine (fT3), free thyroxine (fT4), thyroid-stimulating hormone (TSH), parathyroid homrone (PTH), 25-hydroxyvitamin D (25OHD), follicle-stimulating hormone (FSH), luteinizing hormone (LH), prolactin, C-peptide, cortisol (Roche Diagnostics assays), biotin and its main metabolites (liquid chromatography tandem mass spectrometry) in 23 plasmas from MS patients and healthy volunteers receiving high-dose biotin, and in 39 biotin-unsupplemented patients, before and after a simple procedure (designated N5) designed to remove biotin by means of streptavidin-coated microparticles. We also assayed fT4, TSH and PTH in the 23 high-biotin plasmas using assays not employing streptavidin-biotin binding.

Results:

The biotin concentration ranged from 31.7 to 1160 µg/L in the 23 high-biotin plasmas samples. After the N5 protocol, the biotin concentration was below the detection limit in all but two samples (8.3 and 27.6 μg/L). Most hormones results were abnormal, but normalized after N5. All results with the alternative methods were normal except two slight PTH elevations. In the 39 biotin-unsupplemented patients, the N5 protocol did not affect the results for any of the hormones, apart from an 8.4% decrease in PTH.

Conclusions:

We confirm that most streptavidin-biotin hormone immunoassays are affected by high biotin concentrations, leading to a risk of misdiagnosis. Our simple neutralization method efficiently suppresses biotin interference.
Electronic Commerce
Authors: Slavko Đerić
Published: February 2017

Electronic commerce can be defined in different ways. Any definition helps to understand and explain that concept as better as possible.. Electronic commerce is a set of procedures and technologies that automate the tasks of financial transactions using electronic means. Also, according to some authors, electronic commerce is defined as a new concept, which is being developed and which includes process of buying and selling or exchanging products, services or information via computer networks, including the Internet. Electronic commerce is not limited just to buying and selling, but it also includes all pre-sales and after-sales ongoing activities along the supply chain. Introducing electronic commerce, using the Internet and Web services in business, realizes the way to a completely new type of economy - internet economy.