bluuebunny/crossref_metadata_2025 huggingface dataset:
The Adoption of European Standards in the Sphere of Economic Law and (Anticipated) Cultural Change in Serbia
Authors: Milenković Marko
Published: June 2019

Serbian society has undergone significant changes over the last ten years. The transformation of the legal system has taken place mostly through the process of European integrations and harmonization of legislation with the EU legal order. The primary focus of the paper is on the study of (anticiapted) cultural change which is brought about by changes in economic law. By studying changing attitudes to business operation, the paper seeks to answer the questions of whether we can learn something about cultural change by analyzing economic law and whether we are witnessing the transformation of Serbian citizens into "European citizens", consumers, businessmen, farmers, bureaucrats or politicians. Some of these changes are already in evidence, and it can be said that considerable progress has already been made. Nevertheless, in most areas reforms have yet to be enacted, and therefore this transformation along with its outcome and results can only be anticipated. Following an overview of the Stabilization and Association Process, the signing of the Stabilization and Association Agreement (SAA), and the process of harmonization of legislation and monitored reforms, the paper goes on to analyze whether and to what extent the following have taken place: 1) the opening up of the Serbian economy to foreign competition (primarily European), 2) the implementation of reforms and the introduction of competition rights and government subsidy control, 3) changes in rural Serbia as part of the process of preparation for accession to the EU. It can be concluded that European integrations and the adoption of a series of different standards represent an instrumental framework for significant cultural change in Serbian society. The change will be fundamental and will take long to bring about. For this reason it can only be partially anticipated what its effects will be and whether and to what extent changes will be accopmlished in each of the areas mentioned.
Anthropological Studies of Popular Culture
Authors: Žikić Bojan
Published: June 2019

One of the questions raised at the symposium "Our World, Other Worlds. Anthropology, Science Fiction and Cultural Identity", held in Belgrade in December 2009, is how anthropology is to study contemporary art forms: how research issues are to be defined and approached; how research is to be organized in a specific semantic area, which cannot always and with absolute certainty be said not to be an anthropological construction; whether the subject of research can be said to have the shared nature of cultural communication; whether the anthropologist is to interpret the author/artist’s intention, or that which is produced as a result of that intention, etc. The aim of this paper is to suggest some answers to these questions, from the point of view of a researcher focused on cultural communication.
Symbolic Interactionism, Mass Panics and Urban Legends
Authors: Kovačević Ivan
Published: June 2019

The constructionist approach to social problems has developed a thesis about mass panics and urban legends as „unconstructed social problems“. This thesis, advanced by the American sociologist Joel Best, and his analysis of the urban legend of Halloween sadism, have provided the model for studying three mass panics and two urban legends. The three panics in question are the mass exodus from Kraljevo because of a prophesy that the town would be destroyed in an earthquake, the mass fear of body parts thieves in three villages in Srem, and the panic over the appearance of a cannibal sect in the town of Šabac. The two urban legends involve the rich old emigrant whose acquaintance a child from a poor family made while dialling phone numbers at random, and the thieving postman who set up his own business in Russia with the stolen pension money he had been supposed to deliver.
Tito as a Tourist
Authors: Krstić Marija
Published: June 2019

Yugoslavia's foreign policy orientation and the country's role in the nonaligned movement made it possible for Josip Broz Tito to behave like a tourist. This paper aims to show what kind of tourist Tito was and what elements of tourism are to be found in his travels. Tito’s travels were to be contextualized into an aristocratic tourism and the creation of his personality cult within the Yugoslav political system. The paper will also highlight the contradictions between the official communist ideology and the undisputed leader’s actions which have the characteristics of a capitalist tourist. Within this contradiction, the vindicating mediating factors, „the policy of peace“ and the nonaligned movement as the rationale for most of Tito’s travels as a tourist, were also backed up by the absolute impossibility of publicly drawing attention to the travels of aristocratic luxury unbecoming to the leader of a proletarian movement and of the working class struggle for power.
The Question of World University Rankings, Or: On the Challenges Facing Contemporary Higher Education Systems
Authors: Gačanović Ivana
Published: June 2019

In the context of the interrelatedness of the general methodology of science and the methodology of ethnology and anthropology, on the one hand, and the subject of research of the anthropology of science and the anthropology of education, on the other, as exemplified by the current European and Serbian university reforms, the paper considers one of the fundamental consequences of globalization – the increasing need to compare things on a global level. Comparison often involves the reduction of phenomena to just a few features, preferably those that are easily quantifiable. The increasingly popular, and politically increasingly relevant, world unversity rankings are a case in point. By highlighting the phenomenon of the reduction of comparison to competition and the rehabilitation of positivism, the paper explores the way in which the reduction of criteria for „quality control“ and „determining the excellence“ of institutions of higher education through their ranking leads to the possibly irreversible reconceptualization of the concept of higher education, i.e. of the parameters that define it.
Measurement of Unirrigated Turfgrass Evapotranspiration Rate in the Red River Valley
Authors: Niaghi Ali Rashid , Jia Xinhua , Scherer Thomas , Steele Dean
Published: June 2019

Core Ideas

Soil moisture is needed in defining well‐watered turfgrass condition in evapotranspiration measurement.

Deep soil moisture supports turfgrass growth when surface soil moisture is not sufficient.

The ETa can be estimated from 0.96 ETo using the ASCE‐EWRI standardized method for well‐watered turfgrass.

The ASCE‐EWRI standardized reference ET equation can be used for water management of turfgrass in northern cool climates and during drought periods.

Turfgrass actual evapotranspiration (ETa) measurements are critical for water management and irrigation scheduling. With no historical ETa measurements in eastern North Dakota, turfgrass ETa rates were measured with the residual method using eddy covariance instrumentation and two arrays of soil moisture sensors on unirrigated turfgrass under natural conditions in the 2011, 2012, and 2013 growing seasons. An on‐site weather station provided weather data to calculate the standardized grass‐based reference evapotranspiration (ETo) (Allen et al., 2005). The daily ETa/ETo ratios were screened using the criteria of soil moisture ≥50% of available water for the top 30 cm of the root zone, rain amounts ≤10 mm, and a recovering period after drought. The screened monthly average ETa/ETo ratios for the unirrigated turfgrass were 1.03, 0.98, 0.94, 0.90, 0.82, and 1.18 from May to October. The mean ETa/ETo ratio for the entire growing seasons was 0.96, implying that the American Society of Civil Engineering–Environmental and Water Resource Institute ETo method was valid for guiding the turfgrass ETa calculation even in unirrigated and cold climate conditions. Because this is the first reported study on ETa measurement of a turfgrass site, the limited data can provide a baseline on water management for turfgrass under various weather conditions in this region. The results indicated that a monthly refinement of ETa/ETo values might be required to maintain the landscape turfgrass quality more precisely in terms of water management.
Portugal's First Queer Novel: Rediscovering Visconde de Vila-Moura's Nova Safo (1912)
Authors: Klobucka Anna M.
Published: June 2019

This study seeks to recover the novel Nova Safo (1912) by Visconde de Vila-Moura from the marginal status to which it has been consigned in Portuguese literary history by arguing for its momentous cultural relevance as Portugal’s first queer novel. Given the extremely limited number and scope of existing critical approaches to the text, my reading is oriented by a reparative strategy that aims, first and foremost, to remedy its precarious status as an archival object. I describe the novel's inchoate and cluttered collection of references, images, and storylines as a countercultural scrapbook of queer feeling, ruled by an antiquarian sensibility, whose structures of cohesion belong less to the realm of formal aesthetics than to the sphere of homophilic affective epistemology. Further, I chart Nova Safo's intersecting gestures of transitive embodiment—transnational, transgender, and transracial—by discussing the novel’s mournful evocation of three recently departed icons of fin-de-siècle literary culture: Oscar Wilde, Renée Vivien, and João da Cruz e Sousa.
Furtado, Gustavo Procopio. Documentary Filmmaking in Contemporary Brazil: Cinematic Archives of the Present. Oxford UP, 2019
Authors: Rajca Andrew C.
Published: June 2019

In Documentary Filmmaking in Contemporary Brazil: Cinematic Archives of the Present, film and media studies scholar Gustavo Procopio Furtado makes an impressive contribution to the study of documentary films in Brazil. Consisting of three interrelated sections with two chapters each, the book engages with the concepts of documentary and archive from a variety of perspectives—combining socio-political and theoretical discussion with close analysis of a well-chosen selection of contemporary documentaries.
Metastatic Colorectal Cancer: Prognostic and Predictive Factors
Authors: Nappi Anna , Nasti Guglielmo , Romano Carmela , Berretta Massimiliano , Ottaiano Alessandro
Published: June 2019

:

Colorectal cancer represents the third most frequently occurring cancer worldwide. In the
last decade, the survival of patients affected by metastatic colorectal cancer (mCRC) has improved
through the introduction of biological drugs. However, in this new and dynamic therapeutic context,
research about prognostic and predictive factors is important to guide the oncologists to effective
therapies as well as to improve the understanding of colorectal cancer biology. Their identification is
an intensive area of research and our future goal will be to depict tumour-specific "molecular signatures"
in order to predict the clinical course of the disease and the best treatments.

:

In this report, we describe clinical, pathological and molecular biomarkers that can play a role as
prognostic or predictive factors in mCRC.
Cultural Competence and the Global Role of Dietitians: A Haitian Medical Mission and Inter-Professional, Service-Learning Nutrition Course
Authors: Christaldi Joanne , Bodzio Jessica R.
Published: June 2019

As the poorest Western Hemisphere country, Haiti has a long history of health disparity including elevated rates of hypertension, HIV/AIDS, and tuberculosis. In the summer of 2012, a four-week knowledge and skills based course, including a one-week medical mission, was developed to meet the need for medical care in Haiti, and to provide an interprofessional, service-learning environment to enhance students’ cultural competence. A nonprofit volunteer organization that connects healthcare people with a community in need assisted in developing the mission trip. Background on the culture of Haiti, medical education, and development of nutrition education materials were incorporated into the course. Students participated in classroom activities, assisted with development of nutrition education materials, and maintained a reflective journal during the mission trip. Basic nutrition education, nutrition assessment and evaluation, and breastfeeding instruction were provided to Haitian patients. Additionally, students and faculty interacted with each member of the healthcare team; facilitating a greater understanding of an interprofessional approach to medical care. Incorporating a medical mission trip into dietetics education provides an opportunity to increase cultural competence of faculty and students while providing another outlet for students to gain hands-on experience. Interprofessional service-learning further enhances the educational experience and should be considered as a worthwhile educational technique. Programs looking to incorporate such a mission trip into their curriculum can follow a similar scheme of course development.
Teaching Clinical Judgment: a Review with Consideration of Applications for Health Professions
Authors: Gaba Ann
Published: June 2019

This review explores the concept of clinical judgment and its relationship to critical thinking. A systematic review of the literature was performed in PubMed, using the key words “clinical judgment,” and limiting the search to papers published in English. A hand search located additional pertinent documents. While papers on clinical judgment specifically in nutrition and dietetics are scarce, literature from other disciplines can inform this discussion. How these essential skills are taught and learned in the health professions, and some theoretical views of this area are examined. Following this, the underlying philosophy and educational models are discussed. Lastly, specific educational methods and strategies are described as illustrative examples of how these theoretical concepts can be applied in training health professionals.
Virtual Reality Simulation: An Innovative Teaching Tool for Dietetics Experiential Education
Authors: Davis Anne
Published: June 2019

This paper investigates the role of virtual reality and web technologies in the field of dietetics education. Within this frame, special emphasis is given on the building of web-based virtual learning environments so as to successfully fulfill their educational objectives. In particular, basic pedagogical methods are studied, focusing mainly on the efficient preparation, approach and presentation of learning content, and specific designing rules are presented considering the hypermedia, virtual and educational nature of this kind of applications. The paper also aims to highlight the educational benefits arising from the use of virtual reality technology in dietetics and study the emerging area of web-based dietetic simulations. Virtual reality simulation allows the visualization of data in three dimensions and provides interactive functionalities that reinforce the feeling of immersion into a computer-generated virtual world. Finally, the innovative virtual reality environment for dietetics education pedagogy and development is demonstrated.
Теоретическое моделирование термоэлектрических свойств сплавов Гейслера Fe-=SUB=-2-=/SUB=-Ti-=SUB=-1-x-=/SUB=-V-=SUB=-x-=/SUB=-Sn
Authors: Ашим Е.Ж. , Инербаев Т.М. , Акилбеков А.Т. , Miki H. , Takagi T. , Ховайло В.В.
Published: June 2019

This paper presents theoretical calculations of electronic structure and Seebeck coefficient in Fe2Ti1-xVxSn alloys for the cases fully ordered L21 and partially disordered B2 Heusler crystal structure. It is shown that the band gap increases with the Ti by V substitution. Comparison with the available theoretical and experimental data indicates that taking into account the randomness in the distribution of atoms makes it possible to obtain more comparable to the experimental data values of the Seebeck coefficient
О структуре энергетического спектра дырок в материалах A-=SUP=-IV-=/SUP=-B-=SUP=-VI-=/SUP=- под иным углом зрения
Authors: Прокофьева Л.В. , Константинов П.П.
Published: June 2019

The twofold decrease in hole concentration of all PbTe  samples at 77–450 K and the same effect achieved at 77 K and heavy doping only due to introduction in PbTe of tin small addition, supplemented by observation in indicated range of temperature hysteresis in hole concentration, are the grounds for developing an other approach to a study of the energy spectrum in A(IV)B(VI) materials, an alternative two-band model. It is based on the common for these materials phenomenon — compensation of current carriers as a reaction on electroactive doping. The appearance of compensation is associated with initial (at temperatures below 77 K) two-charge process — participation in a single doping act of the pair of electrons due to their mutual attraction. With a rise in temperature, as with introduction of tin, the situation is changed. The study of all aspects of transformation is a task for further research.
Влияние отжига на свойства слоев Ge : Sb/Si(001) с концентрацией сурьмы выше уровня ее равновесной растворимости в германии
Authors: Юрасов Д.В. , Байдакова Н.А. , Дроздов М.Н. , Морозова Е.Е. , Калинников М.А. , Новиков А.В.
Published: June 2019

The impact of rapid thermal treatment on electrical and luminescent properties of Ge:Sb/Si(001) layers which have Sb concentration much higher than the equilibrium solubility limit was investigated. Local modifications of such properties throughout the structure’s depth were revealed using precise wet chemical etching. It was obtained that at relatively low annealing temperatures ( 500°С) the changes of electron concentration and photoluminescence response may occur without any remarkable diffusion-related redistribution of dopant atoms. For the relatively high ( 700°С) annealing temperatures the changes of electrical and optical properties after anneal are caused by the significant Sb bulk diffusion and desorption from the sample surface. In particular Sb bulk diffusion leads to the formation of doped regions in the initially undoped areas which further contribute to the resulting structure conductivity and its photoluminescence signal.
Сферический распределенный брэгговский отражатель cо всенаправленной стоп-зоной в ближней ИК-области спектра
Authors: Медведев А.В. , Дукин А.А. , Феоктистов Н.А. , Голубев В.Г.
Published: June 2019

Spherical distributed Bragg reflectors (SDBR) for near-infrared applications are elaborated via plasma-enhanced chemical-vapor deposition. They consist of the alternating quarter-wave layers of amorphous hydrogenized silicon (a-Si:H) and amorphous silicon oxide (a-SiO2) deposited onto a glass microsphere or quartz microsphere, doped by erbium ions with a diameter of 500 microns. The reflection and transmission spectra of the SDBR are measured at different points of its surface. A wide band with a high reflectance and a low transmittance – a stop-band is detected. It is demonstrated that for different radial directions from the center of the microspheres the stop-bands overlap, forming an omnidirectional stop-band. The influence of the omnidirectional stop-band on spontaneous emission of erbium ions (1.53 micron) from the quartz microsphere is studied. It is shown that the omnidirectional stop-band suppresses the intensity of spontaneous emission by more than an order of magnitude.
Особенности ионизации примесей в квазиклассически сильных постоянном и переменном электрических полях в двумерной сверхрешетке на основе графена
Authors: Бадикова П.В. , Глазов С.Ю. , Сыродоев Г.А.
Published: June 2019

The absorption coefficient of an electromagnetic wave in a two-dimensional graphene-based superlattice in the presence of a constant electric field for the case of quasiclassically strong electric fields is investigated. Anisotropy of the absorption coefficient was found for different orientations of the constant vector voltage and the polarization vector of alternating electric fields. It is shown that a slow increase in the absorption coefficient at low frequencies is due to impurity absorption, and it’s more rapid growth at high frequencies is determined by intermini-bands transitions. These features can be used to create radiation detectors.
Магнетотранспортная спектроскопия интерфейсных, квантово-ямных и гибридных состояний в структурах с многочисленными слоями HgTe толщиной 16 нм
Authors: Васильева Г.Ю. , Грешнов А.А. , Васильев Ю.Б. , Михайлов Н.Н. , Усикова А.А. , Haug R.J.
Published: June 2019

AbstractThe longitudinal and Hall components of the resistivity tensor are measured in structures with multiple HgTe layers 16 nm thick in magnetic fields to 12 T at temperatures from 1.5 to 300 K. The slope of the magnetic-field dependence of the Hall resistance is found to change its sign at a certain critical temperature T _ c = 5 and 10 K in the two studied samples, which indicates the presence of two types of charge carriers and a change in the relation between their contributions to the Hall resistance with temperature. The low critical temperature and manifestation of the “two-component” nature of the Hall curves only at T > T _ c prove that the ground state of the system at T = T _ c is gapless. At higher temperatures (20 K < T < 200 K), the Hall concentration is proportional to the temperature with good accuracy. The description of the charge-carrier dispersion laws by the 8-band kp model taking into account Γ_8-band-edge splitting caused by mechanical stresses, which forms both types of state in HgTe, makes it possible to quantitatively describe the observed magnetotransport features. It is shown that they are associated with the simultaneous filling of electron and hole states formed as a result of mixing interface states responsible for the topological-insulator phase and the quantum-confined states in the Γ_8 band.
Эпитаксиальный карбин: аналитические результаты
Authors: Давыдов С.Ю.
Published: June 2019

AbstractThe Green’s function method in the tight-binding approximation is used to obtain analytical expressions for the electronic spectra and densities of states for two carbyne structural modifications (cumulene and polyyne). Metal and semiconductor substrates are considered and charge-transfer estimates are deduced. Criteria for the occurrence of a charge-density wave in free-standing and epitaxial carbynes are proposed taking into account the intra- and interatomic Coulomb repulsion. Analytical expressions for the phonon spectrum of free-standing carbyne are presented. The data obtained are compared with the results of numerical calculations performed by other researchers.
Высоковольтные диффузионные диоды с резким восстановлением. I. Численное моделирование
Authors: Кюрегян А.С.
Published: June 2019

The operation of diffusion step recovery diodes (dSRD) as current interrupters in high-power nanosecond pulse generators was studied in detail by the methods of numerical computer simulation for the first time. One of the necessary conditions that minimize the loss in dSRD was specified. Dependences of pre-pulse voltage, front duration, amplitude and duration of pulse formed on the active load, and the energy of switching losses in the dSRD on the device area and the break current density are obtained. It is shown that simulation results can be described by simple analytical formulas obtained in the second part of the work, with an accuracy of 10-20% if the pulse amplitude does not exceed the avalanche breakdown voltage of the dSRD. The generalized figure of merit which can be used for optimization of dSRD parameters, a mode of its operation and comparison of efficiency of current interrupters of various types was offered.
Cвойства полуполярного GaN, выращенного на подложке Si(100)
Authors: Соломникова А.В. , Бессолов В.Н. , Коненкова Е.В. , Орлова Т.А. , Родин С.Н. , Середова Н.В. , Щеглов М.П. , Кибалов Д.С. , Смирнов В.К.
Published: June 2019

AbstractSemipolar GaN layers synthesized on a nanostructured Si(100) substrate are studied. It is shown that using a Si(100) nanoprofile combined with Si_ x N_ y nanostrips on top of nanostructures can yield, via metal-organic chemical-vapor deposition, GaN(10 $$\bar {1}$$ 2) layers. An additional SiC buffer layer makes it possible to obtain GaN(10 $$\bar {1}$$ 1) layers with a full-width at half-maximum of the diffraction-curve of ω_θ ≈ 35′ arcmin. It is found that the luminescence properties of the semipolar layers are mostly due to basal plane stacking faults BSF_ S -I_1, in contrast to polar layers in which these properties are mostly due to the recombination of excitons.
Исследование влияния переходного слоя нанопористого кремния на атомное и электронное строение, а также оптические свойства гетероструктур A-=SUP=-III-=/SUP=-N/por-Si, выращенных методом плазменно-активированной молекулярно-пучковой эпитаксии
Authors: Середин П.В. , Леньшин А.С. , Золотухин Д.С. , Голощапов Д.Л. , Мизеров А.М. , Арсентьев И.Н. , Бельтюков А.Н.
Published: June 2019

This paper reports on influence of the nanoporous Si buffer layer on morphological, physical and structural properties of the InxGa1-xN layer with nanocolumnar morphology of the surface, grown by plasma assisted molecular beam epitaxy on the traditional Si(111) substrates. By means of various structural and spectroscopy methods electronic structure, morphology of the surface and optical properties of grown heterostructures was studied. We showed that usage of por-Si ad-layer helps to achieve more isotropic InGaN nanocolumns diameter distribution as well as to increase PL intensity up to 25%.
Cоотношение Холла-Петча для размеров скачков деформации металлов
Authors: Шпейзман В.В. , Якушев П.Н.
Published: June 2019

AbstractThe paper presents an attempt to use the Hall–Petch relationship to relate the yield strength of copper and titanium in three different states (initial, annealed, and after equal-channel angular pressing) to the sizes of nano- and micrometer deformation jumps measured using a precision interferometric technique. It is shown that, upon a compression strain near the yield point, one can observe six levels of deformation with three nano- and three micrometer sizes of deformation jumps from 1–2 nm to 20–35 μm. Each of the six structural states of metals is characterized by its own set of deformation jump sizes. Dependences of the yield strengths of copper and titanium on the jump sizes L ^–1/2 are constructed, and the general regularities and features of deformation jumps for each of the metals in different structural states are discussed.
Микрокристаллическая структура и светоизлучающие свойства 3C-SiC островковых пленок, выращиваемых на поверхности Si(100)
Authors: Орлов Л.К. , Вдовин В.И. , Ивина Н.Л.
Published: June 2019

AbstractThe crystal structure features and light-emitting properties of 3 C –SiC island films grown at decreased temperatures on the Si(100) surface by vacuum chemical epitaxy with the use of hydrogen-containing compounds are studied. The nucleation character and growth mechanisms of the nanocrystalline texture of microislands and the effect of elastic stresses accumulated on the surface of a growing carbide film on the shape of nucleating islands are traced by the methods of microscopy. The cathodoluminescence spectra from the surface carbidized Si layer and different areas of an individual 3 C –SiC island are compared. The possible mechanisms of the appearance of additional spectral lines shifted with respect to the major peak towards the red and ultraviolet spectral regions in the observed spectra of epitaxial structures are discussed. These emission bands were earlier revealed only in the luminescence spectra of SiC nanocrystallites embedded into different (most often SiO_2) matrices. The comparative analysis of the behavior of lines in the observed luminescent spectra has not revealed any appreciable size effect of formed surface nanocrystallites on their positions, but demonstrated their evident dependence on the oxygen content at the 3 C –SiC layer/silicon substrate interface.
Высокотемпературные фазовые переходы в ZrO-=SUB=-2-=/SUB=-
Authors: Горелов В.П.
Published: June 2019

Abstract. Analysis of the primary sources shows that there is only one reliable message about the observation of the cubic phase by x-ray method. This phase is observed at least 2500°C. All other reports on the observation of the phase transition in tetragonal modification at about 2300°C are reliable only regarding the existence of the transition at that temperature. But this is a transition to the t'-tetragonal phase. It should be concluded that at normal pressure ZrO2 has four polymorphic modifications: monoclinic (m), two tetragonal (t and t') and cubic (c), passing one to another with increasing temperature.
Work is performed under partial support of RFBR grant 17-08-01227. The author is grateful to A.V. Kuzmin and V.B. Balakireva for valuable comments and assistance in the work.
Локализация экситона Ванье-Мотта на органополупроводниковом интерфейсе ленгмюровская пленка / CdS"
Authors: Королькова К.А. , Новак В.Р. , Селькин А.В.
Published: June 2019

Low temperature (T=2 K) optical reflection spectra have been studied for the organic-semiconductor structures prepared by deposition of Langmuir-Blodgett films on CdS surface. The spectra are measured in the resonant spectral range of the exciton state in CdS. Theoretical analysis of the spectra is carried out with an account of the spatial dispersion effects and the exciton-free surface “dead” layer. The conclusion has been drawn of the interface localization of the Wannier-Mott exciton due to organic film deposition on the crystal surface.
Магнитная анизотропия тонких пленок железа, покрытых графеном
Authors: Дунаевский С.М. , Лобанова Е.Ю. , Михайленко Е.К. , Пронин И.И.
Published: June 2019

AbstractThe ab initio calculations of the magnetic anisotropy of thin (to six monolayers) nickel films and iron films with unusual fcc structures formed upon intercalation of graphene with Fe atoms are presented. The data have been obtained for both the pure-surface films and the films coated with graphene. The density functional theory and the pseudopotential method are used to calculate the magnetic moments of atoms of all the layers and to determine the total energies of the structures with different orientations of magnetic moments of iron and nickel atoms with respect to the film surface. A strong influence of graphene on the magnetic properties contacting iron films is demonstrated.
Синхронизация в турбулентном сферическом течении Куэтта под действием неравномерного вращения
Authors: Жиленко Д.Ю. , Кривоносова О.Э.
Published: June 2019

Turbulent flows of viscous incompressible fluid in rotating spherical layer in the presence of synchronization are under consideration. Numerical results are presented. Synchronization of turbulent flow is due to the action of periodical modulation of the angular velocity of inner spherical boundary. The angular velocity of outer spherical boundary is constant. Obtained results were compared with experimental data. The interval of modulation amplitudes was determined where synchronization is followed by intermittency “chaos – chaos”.
Формирование наночастиц натрия и калия при локальном электронном облучении щелочно-галоидных кристаллов
Authors: Сидоров А.И. , Юрина У.В. , Подсвиров О.А.
Published: June 2019

It is shown experimentally that during local electron irradiation of NaCl, KCl and KBr crystals by electrons with energy 50 keV spherical metal nanoparticles of sodium and potassium with plasmon resonances in visible spectral region are formed. Optical density spectra of crystals after electron irradiation are presented. By computer simulation the possibility of solid or liquid state of nanoparticles is studied, as well as interference effects, which appear in the irradiated zone of crystals.
О границах применимости приближения Хольма--Кольрауша для определения нагрева сильноточных симметричных электрических контактов
Authors: Бегаль Д.И. , Павлейно М.А. , Павлейно О.М. , Сафонов М.С. , Статуя А.А.
Published: June 2019

On the basis of numerical simulation of heating of symmetric contacts by flowing current,were drawn conclusions about the accuracy of determining the temperature by the Holm – Kohlraus method for various methods of cooling the contacts, including with intensive air and liquid cooling. The question of the possibility of using this method for pulsed heating of contacts. It is shown how the accuracy of determining the temperature of the contact pads depends on the choice of locations for measuring the surface temperature and the potential difference.
Дальнейшее развитие и уточнение концепции эффективного потенциала для стробоскопических выборок координат и скоростей ионов в квадрупольных радиочастотных полях
Authors: Бердников А.С. , Галль Н.Р. , Масюкевич С.В.
Published: June 2019

The recently proposed concept of the effective potential for stroboscopic samples of the coordinates and velocities of ion motion a radio frequency quadrupole field, is considered. The exact formulas are obtained which are valid for the stroboscopic model of ion motion at any point of the stability zone. The analysis of the formulas obtained leads to the adjustment of some provisions of the initial concept of the effective potential of stroboscopic samples, developed for the neighborhood of the top of the zone of stability.
Комбинированные электромагнитные подвесы с пониженным энергопотреблением для левитационного транспорта
Authors: Андреев Е.Н. , Арсланова Д.Н. , Ахметзянова Е.В. , Базаров А.М. , Васильев В.Н. , Васильева О.С. , Верхотуров М.С. , Гапионок Е.И. , Дёмина А.А. , Завадский С.В. , Зенкевич М.Ю. , Капаркова М.В. , Кузьменков В.Д. , Лабусов А.Н. , Ларионов М.С. , Манзук М.В. , Мизинцев А.В. , Неженцев А.Н. , Овсянников Д.А. , Овсянников А.Д. , Хохлов М.В.
Published: June 2019

The magnetic levitation technology is principally categorized as electromagnetic suspension and electrodynamic suspension, both now practically implemented in maglev trains in China, Korea, Japan and other countries. The magnetic field to levitate a vehicle can be provided by either normal conducting electromagnets, or superconducting magnets, or high-coercivity permanent magnets. With the technology advancing in superconductors and magnetic materials, hybrid configurations that employ different types of magnets become promising for commercial application. Magnets synergy results in better performance and lower energy consumption as justified by virtual prototyping and measurements on sub-scale models. Stable levitation of a loaded platform has been demonstrated on a test bench. A series of parametric simulations (performed with the use of software developed in RF) and magnetic measurements enabled validation of computational and physical models of all magnets and adjustment of numerical procedures for scaling parameters with respect to the practical load capacity and other operational characteristics. The established approach will be used for full-scale modelling of realistic maglev vehicles, particularly, a 50-ton flat freight car.
Поверхностные поляритоны в пленках нитридов алюминия и галлия, легированных кремнием
Authors: Новикова Н.Н. , Яковлев В.А. , Климин С.А. , Малин Т.В. , Гилинский А.М. , Журавлев К.С.
Published: June 2019

AbstractThe reflection and attenuated total reflection spectra of aluminum and gallium nitride films doped with silicon on sapphire substrates with a buffer layer of aluminum nitride have been measured. In the spectra of attenuated total reflection, surface phonon and plasmon–phonon polaritons were observed. A high concentration of charge carriers in the gallium nitride film and their practical absence in the aluminum nitride film were experimentally observed.
В каких случаях и почему стандартная модель туннелирующих двухуровневых систем неадекватно описывает низкотемпературную внутреннюю динамику реальных стекол
Authors: Вайнер Ю.Г.
Published: June 2019

AbstractExperiments carried out in recent years using single-molecule spectroscopy to study the low-temperature dynamics of some molecular solid-state media with a disordered internal structure made it possible to obtain new information on the dynamics of such media at the local level. In some substances, the time-dependent behavior of the majority of individual spectra of single fluorescent molecules introduced into the studied medium as a local spectral probe corresponded to the predictions of the standard model of tunneling two-level systems. In others, the behavior of most of the spectra of single molecules was more complicated, which it is difficult to describe in the framework of the standard model. This paper is devoted to the analysis of the results of studies of low-temperature spectral dynamics of single fluorescent molecules in a number of disordered molecular systems (amorphous polyisobutylene, toluene, cumene, propylene carbonate). The observed deviations from the predictions of the theory are associated with the microstructure of the systems under study and the sample shape. Possible reasons for the deviations of the observed local spectral dynamics from the predictions of the standard model of tunneling two-level systems are discussed. Inadequately.
Диагностика горячих зон методом абсорбционной спектроскопии с диодными лазерами (обзор)
Authors: Лигер В.В. , Мироненко В.Р. , Курицын Ю.А. , Большов М.А.
Published: June 2019

AbstractA review of the works that we have been carried in the last 5 years on the use of the method of absorption spectroscopy with diode lasers for the diagnosis of hot zone parameters is given. A spectrometer with two lasers operating in different spectral ranges with sufficiently strong absorption lines has been developed for the case of high pressures and gas temperature. The results of the search for optimal lines in different spectral ranges have been presented. The results of laboratory measurements and tests at the experimental power stand at TSAGI Named after Prof. N.E. Zhukovsky have been presented. Approaches to determining the maximum temperature for spatially inhomogeneous hot zones have been discussed. The method of difference spectra and method of fitting the experimental spectrum with the sum of one-temperature spectra have been proposed. The efficiency of the proposed processing algorithms for specific types of hot zones has been shown experimentally.
Изучение корреляций содержания клинически важных жирных кислот в пище и крови со спектрами поглощения ближнего инфракрасного диапазона
Authors: Калинин А.В. , Крашенинников В.Н. , Титов В.Н.
Published: June 2019

AbstractFatty acid triglycerides are essential components of the human diet, while possessing unique biological activity. Their content in biological media is traditionally determined by gas and liquid chromatography. They are not readily available for mass analysis of food products and blood serum due to the complexity of these methods. The aim of our work is to study the correlation of the absorption spectra of near-infrared radiation with the characteristic oscillations of functional groups of clinically important fatty acids, such as palmitic saturated ones and oleic and linoleic unsaturated ones, as well as their trans -isomers, as well as to develop techniques and test equipment for rapid assessment of their content in fat products and blood serum. As a result, evidence of the applicability of the Fourier spectrometer in the wavelength range of 1.0–2.4 μm for the operational analysis of clinically important fatty acids in butter, spreads and serum, as well as the correlation of the absorption spectra of serum with the content of total triglycerides and cholesterol were revealed. In addition, using a portable spectrometer in the wavelength range of 1.0–1.65 μm suitable for mass analysis of fat-and-oil products quality, the content of these fatty acids was determined, and the selectivity of their determination was studied.
Роль жидкого подслоя Al в качестве катализатора направленного роста нанокристаллов ZnO
Authors: Волчков И.С. , Ополченцев А.М. , Задорожная Л.А. , Григорьев Ю.В. , Каневский В.М.
Published: June 2019

The study shows for the first time the effect of preformed alloying Al layer
deposited on silicon substrate upon the morphology and orientation growth of
ZnO:Al nanocrystals array. The stages of decay of the alloying Al layer into droplets
of the quasi-liquid phase, from temperature treatment at the initial stage of the
growth according to the vapor-liquid-crystal (VLC) mechanism, are demonstrated.
The schema of growth stages of ZnO nanocrystals according to VLC mechanism, on
Si substrate with a pre-applied layer of the alloying metal, is presented.
Способ сохранения ориентации плоского ударника, ускоряемого в канале сжатым газом
Authors: Гук Д.Е. , Мешков Е.Е.
Published: June 2019

The problem of acceleration in a cylindrical channel by a compressed gas (in particular, by the detonation products of a mixture of acetylene and oxygen) of a thin flat striker is related to the problem of a falling sheet of paper", since the movement of the striker in the channel is unstable with respect to the lateral displacement. This can lead to a violation of the symmetry of the flight of the striker, its skew and a sharp decrease in the achieved speed of the striker. The possibility of preserving the orientation of the striker by limiting its lateral displacement by a uniform arrangement on the inner surface of the channel (on the forming surface) of several thin strands of polymer fishing line is experimentally shown.
Рост полупроводниковых III-V гетероструктур на подложках SiC/Si
Authors: Шарофидинов Ш.Ш. , Кукушкин С.А. , Редьков А.В. , Гращенко А.С. , Осипов А.В.
Published: June 2019

A heterostructure consisting of three thick layers: AlN (thickness 0.72 μm), AlGaN (thickness 1.82 μm) and GaN (thickness 2.2 μm) was grown by the method of chloride hydride epitaxy on Si with a buffer layer of nano-SiC. The nano-SiC layer was obtained by the method of atomic substitution. The grown heterostructure was studied by scanning electron microscopy, back-reflected electron diffraction, energy dispersive analysis, and Raman scattering. Studies have shown that the use of nano-SiC/Si substrates makes it possible to grow III-V layers with a high growth rate (~ 66 μm/h) without cracks and with small residual elastic stresses (~ 160 MPa).
Термокапиллярные структуры и разрыв нагреваемой пленки жидкости
Authors: Чиннов Е.А.
Published: June 2019

The data of thermocapillary structures formation and breakdown of the heated liquid film flowing down on a vertical surface with the Reynolds number varied from 0.1 up to 500 are analyzed. It is shown that the interaction of waves with thermocapillary structures type A leads to an increase in critical heat flux, corresponding to the liquid film rupture, compared with literature data (regime B).
Young People’s Attitudes and Motivations Toward Social Media and Mobile Apps for Weight Control: Mixed Methods Study
Authors: Nikolaou Charoula Konstantia , Tay Zoey , Leu Jodie , Rebello Salome Antonette , Te Morenga Lisa , Van Dam Rob M , Lean Michael Ernest John
Published: June 2019

Background

Effective prevention at a young enough age is critical to halt the obesity epidemic. Mobile health (mHealth) apps would potentially reach large numbers at low-cost. While there is already a profusion of lifestyle apps, they are mostly non-evidence-based and evidently ineffective against rising obesity prevalence.

Objective

The aim of this study was to explore preferences and usage of lifestyle apps among young people in 6 countries.

Methods

A mixed methods study was conducted among young people aged 13 to 24 years residing in the United Kingdom, Belgium, Finland, Greece, Singapore, and New Zealand. Participants were recruited from Web advertisements on Facebook, asking for volunteers interested in mobile apps in general, not specific to lifestyle or health, to complete a short survey comprising 18 questions on demographics, weight gain, and mobile app preferences and then to join English-language online focus groups, which were held during 2017, in password-protected Web rooms, moderated by an experienced researcher. Descriptive statistics were carried out for the survey, and thematic analysis was applied to transcripts.

Results

A total of 2285 young people (610 adolescents aged 13-17 years and 1675 young adults aged 18-24 years) responded and completed the survey, with 72.0% (1645) reported being concerned about weight gain for themselves or friends. Later, 807 young people (376 adolescents and 431 young adults) were selected based on age and country to participate in 12 online focus groups, with 719 young people completing. Analysis revealed 4 main themes: (1) feelings toward personal weight; (2) perception of lifestyle apps and desired content for weight gain prevention; (3) social media apps, lifestyle apps, and motivation for downloading and retaining; and (4) data safety and data usage and confidentiality. Young people are interested in evidence-based advice in programs incorporating their preferences.

Conclusions

Young people are commonly, and consistently across 6 countries, concerned about weight gain and obesity and would welcome evidence-based mHealth programs, provided the views of young people themselves are incorporated in the program content.
Smartphone-based interventions in German language in affective disorders – a review about currently available products (Preprint)
Authors: Fellendorf Frederike , Hamm Carlo , Platzer Martina , Dalkner Nina , Bengesser Susanne Astrid , Birner Armin , Rieger Alexandra , Lenger Melanie , Maget Alexander , Reininghaus Eva Z
Published: June 2019

BACKGROUND

Currently, numerous new products such as applications (apps) for smartphones are being marketed in the electronic (e)-health sector. Mood-graphs, diagnostic questions, mindfulness exercises and chat-therapy affect psychiatric treatment of affective disorders (ADs) positively. The products are easily available and allow for little control over efficacy and adverse effects.

OBJECTIVE

A systemic review was performed in order to examine the currently available apps that advertise for supporting people with AD and anxiety disorders.

METHODS

The keywords “psychiatry”, “depression”, “bipolar”, “anxiety”, “mood” in German language were entered in Google Play Store and IOS iTunes and all available products were examined. Furthermore, the current research on these apps should be listed transparently at clinicaltrials.com and PubMed.

RESULTS

Depending on keywords and app store, respectively, 98 to 250 products were spotted. 56 of the apps were included in this paper as they are related to AD. However, only nine of them are supported by scientific research or federal authorities. Five products are currently study subjects in clinical trials, but no publication was available at the time of research. Moreover, five publications of study protocols of other German-language apps, as well as five publications about evaluated products in PubMed were found.

CONCLUSIONS

Diverse free apps with potentially favorable effects on mood stabilization are available for people suffering from ADs. As currently only a very small number of them have been scientifically evaluated, there is an urgent need for research in the mobile e-health sector. In addition, physicians and psychotherapists should talk to their patients about the advantages and disadvantages of apps and inform them about the lack of evidence.