bluuebunny/crossref_metadata_2025 huggingface dataset:
Properties of De-Icing Agents for Use on Paved Airfield Pavements After Their Expiration Dates
Authors: Rumak Aleksandra , Kowalska Danuta , Kowalewska Agata
Published: May 2020

The NO-17-A205:2017 “Airfield maintenance in winter. Use of de-icers. Requirements and tests” Military Standard is applicable at Polish Armed Forces airports in the process of winter maintenance of airport pavements, both in the process of supplying airports with de-icing agents based on acetates and formates, as in testing, acceptance and control of de-icing agents based on formates, acetates and urea. After the expiration date of product, the tests specified in NO-17-A205:2017 shall be repeated.

Purpose of the research is to determine physico-chemical properties changes of de-icing agents applied on artificial airfield pavements, after its expiration dates. The results of research on physical and chemical parameters of de-icing agents obtained at the stage of delivery and after its expiration dates have been given. The tests included determination of appearance, density, refractive index and pH value measurement, as well as checking the freezing point temperature and, in the case of deicing agents in form of granulate, checking the granules size distribution. The requirements and test methods for deicing agents in accordance with NO-17-A205:2017 are also presented. In case of parameters changes, recommendations regarding further use of these agents shall be made. Positive tests results shall be the basis for extending the shelf life of de-icing products for the next winter season.
Modelling of SiPM Performance for Detection of Cherenkov Radiation from Extensive Air Showers in UV and Visible Ranges for Application at the TAIGA-IACT Telescope
Authors: Bogdanov A.A. , Kholupenko E.E. , Tuboltsev Yu.V. , Chichagov Yu.V.
Published: May 2020

A novel cluster of sensitive detectors based on silicon photomultipliers (SiPM) is being developed for the Cherenkov gamma-ray telescope TAIGA-IACT (Tunka valley, Republic of Buryatia, Russia). The cluster will be able to detect Cherenkov radiation from extensive air showers in two wide bands: 250–300 nm (UV) and 250–700 nm (visible and UV). Each pixel consists of a Winston cone, 4 SiPMs with the total sensitive area of 144 mm2, and readout electronics based on fast analogue memory. During operation in the UV band, a UV-bandpass filter is used to suppress cluster sensitivity in the visible range. In order to evaluate the detection efficiency of the selected SiPMs, a specific software simulator of SiPM output signal has been developed. This simulator takes into account such inherent parameters of SiPMs as total number of microcells, their recharge time, the dark count rate, the effective detection area, the quantum efficiency, the crosstalk between microcells, as well as conditions of SiPM operation, namely, the background noise and the Ohmic load in the readout (front-end) electronics. With this simulator it is possible to determine the expected trigger threshold under given conditions and parameters of selected detectors. Based on preliminary simulations, OnSemi MicroFJ-60035 SiPM chips have been chosen for the novel cluster of TAIGA-IACT. These SiPMs have sensible efficiency in the ultraviolet range (5–20% in the 250–300 nm band) and are distinguished by the presence of a fast output, which allows one to capture a low amplitude signal above a relatively high background noise.
Data Reduction and Imaging of Gravitational Lens System Class B0631+519
Authors: Prūsis K. , Nikolajevs A.
Published: May 2020

The present paper describes reduction procedures and imaging of radio astronomical data from the gravitational lens system CLASS B0631+519 acquired by e-MERLIN interferometer. The source has been previously imaged with VLA, MERLIN and the VLBA interferometers. Data reduction and polarisation calibration procedures will provide data on Faraday effects such as Faraday rotation and depolarization between lensed images that in turn carry information on large and small-scale magnetic fields in the lensing galaxy.

Reduction of data and imaging of the radio astronomical source have been achieved using Astronomical Image Processing System (AIPS) in conjunction with automatic data reduction pipelines that performed specific data processing steps. As a result, the sky map for the gravitational lens system has been successfully acquired and accuracy comparing the generated map to sky maps of the source produced by different authors has been confirmed.
Induction and Formation of Accessory Corpus Luteum after Artificial Insemination (AI) Might Increase Pregnancy Rate per AI in Heat Stressed Dairy Cows
Authors: Stojanov Boris , Atanasov Branko , Grizelj Juraj , Vince Silvio , Nikolovski Martin , Kjosevski Miroslav , Dovenski Toni , Adamov Nikola , Ilievska Ksenija , Samardzija Marko
Published: May 2020

The present study aimed to evaluate whether the induction and the formation of an accessory corpus luteum (CL) after AI might increase the pregnancy per AI (P/AI) in heat stressed dairy cows. Starting at d 50±3 post-partum, 113 lactating Holstein cows from one commercial herd during summer were scored for body condition, blood sampled and examined by ultrasound. Those bearing a CL>25mm and progesterone (P4) level>2ng/mL were synchronized using a double PGF2α injection given 12 h apart and AI-ed at detected estrus. In total 18 cows, there were not any signs of estrus (n=10) nor a P4 level <2ng/mL at the time of enrolment (n=8) and therefore they were excluded from the study, leading to 95 cows finally enrolled.. At d5 post-AI, cows were randomly allocated into 2 groups: control group (CON, n=45) without any additional treatment, and treatment group (GnRH, n=50), treated with 0.008 mg Buserelin – a GnRH agonist. Blood sampling and ultrasound examination were done at d5, d14 and at d21 after AI, whereas the pregnancy diagnosis was done at d21 and d30 after AI. Average daily temperature and relative humidity values were used to calculate the temperature-humidity index (THI). The average THI during the experiment was 79.5±0.6. At d5, no differences were observed neither between the number of the CL nor between the P4 level in both groups. At d14 and d21, 82% of the GnRH-treated cows had more than one CL versus 0% of the CON cows. Both at d14 and 21, GnRH-treated cows had higher P4 levels compared to the CON cows (p<0.05). In addition, P/AI were higher in the GnRH group than in the CON group (65% vs. 48.3%, p<0.05), whereas late embryonic losses were higher in CON in comparison to GnRH cows (10.6 vs. 4%, respectively). The BCS at the moment of insemination did not affect P/AI (p>0.05). In conclusion, the induction of an accessory CL at d 5 after AI might increase P/AI in heat stressed dairy cows.
Scientific citizens, smartphones and social media – reshaping the socio-spatial networks of participation: Insects, soil and food
Authors: Reed Matt
Published: May 2020

The conjunction of citizen science and social media through the mediation of the smartphone is investigated in this Scientific Communication, following on from the last issue of the Moravian Geographical Reports (2019, Vol. 27, No. 4). Through a reconsideration of three previously published articles, in part written by the author, this paper reflects on these topics with regard to farmer innovation, local food networks and citizen-informed ecology. Each of these papers has used Twitter to gather data about practices of innovation and observation that have revealed new insights about innovation networks amongst farmers, urban-rural connections and insect behaviours. The reflections reported here are embedded in a discussion of the rise of the term ‘Citizen Science’. Recent experiences in areas as diverse as fisheries management and combating Ebola, have informed societal needs for greater engagement in finding inclusive, comprehensive solutions to urgent socio-ecological problems. This paper suggests a compositional approach to studies using citizen scientists and their data as a new avenue of practice and investigation.
Material Work Environment and Work Comfort in the Opinions of University Employees
Authors: Syper-Jędrzejak Marzena
Published: May 2020

This paper describes factors of material environment that are particularly important for employees comfort on the example of a selected University. The main goal of the presented research was to identify factors of work comfort related to material and social-living conditions of work and their assessment based on the opinion of employees in a selected institution. A two-stage study conducted in 2016–2018 among 440 university employees made it possible to identify factors relevant to the comfort of work, mainly related to material conditions. Based on the opinions of university employees (questionnaires and interviews), problem areas were identified in the scope of shaping comfortable working conditions.
Density functional study of structures, stabilities and electronic properties of AgAunλ(λ=0,±1;n=1-12){\rm{AgAu}}_n^\lambda \left( {\lambda = 0, \pm 1;n = 1 - 12} \right) clusters: comparison with pure gold clusters
Authors: Ranjan Prabhat , Chakraborty Tanmoy , Kumar Ajay
Published: May 2020

Geometrical structures, relative stabilities and electronic properties of neutral, cationic and anionic pure gold

A

u

n
+
1

λ

{\rm{A}}u_{n + 1}^\lambda

and Ag-doped bimetallic

AgAu

n
λ

(

λ
=
0
,
±
1
;
n
=
1
-
12

)

{\rm{AgAu}}_n^\lambda \left( {\lambda = 0, \pm 1;n = 1 - 12} \right)

clusters have been systematically investigated by using density functional theory methodology. The optimized structures show that planar to three-dimensional structural transition occurs at n = 5 for cationic clusters. Due to strong relativistic effect of Au clusters, the ground state configurations of neutral and anionic bimetallic clusters favor planar geometry till n = 12. Silver atoms tend to occupy the most highly coordinated position and form the maximum number of bonds with Au atoms. The computed HOMO-LUMO energy gaps, fragmentation energies and second-order difference of energies show interesting odd-even oscillation behavior. The result indicates that AgAu5,

AgAu

2
+

{\rm{AgAu}}_2^ +

and

AgAu

2
-

{\rm{AgAu}}_2^ -

are the most stable clusters in this molecular system. The DFT based descriptors of bimetallic clusters are also discussed and compared with pure gold clusters. The high value of correlation coefficient between HOMO-LUMO energy gaps and DFT based descriptors supports our analysis. A good agreement between experimental and theoretical data has been obtained in this study.
Study on Hydrodynamic Configuration Parameters of Vertical-Axis Tidal Turbine
Authors: Guangnian Li , Chen Qingren , Liu Yue , Zhu Shanqiang , Yu Qun
Published: May 2020

In this paper, a numerical code for predicting the hydrodynamic performance of vertical-axis tidal turbine array is developed. The effect of the tip speed ratio, solidity, and preset angle on the hydrodynamic performance are discussed using a series of calculations. The load principle of the rotor and the variation principle of the turbine power coefficient are studied. All these results can be considered as a reference for the design of vertical-axis tidal turbines.
Detection of Wavy Sea Surface Oil-Derivative Contamination with Forward Specular High-Frequency Scattering
Authors: Pogorzelski Stanisław , Rochowski Paweł , Grzegorczyk Maciej , Linde Bogumił B. J. , Skrodzka Ewa , Bielasiewicz Łukasz
Published: May 2020

A spectrum of low-frequency (20–30 Hz) amplitude fluctuations of the ultrasonic (10 MHz) signal specularly scattered from water surfaces covered with monomolecular and thicker crude oil origin films of well-defined, oceanographically relevant viscoelastic properties was examined in laboratory and at-sea conditions. The relationship between the surface water wave (30 Hz) damping coefficient and the oil layer thickness was established, and compared to the one predicted by the classical Stokes theory. The depression of the spectral energy density of wind-driven waves by surface films was inferred from the ratio of acoustic signal fluctuations spectra with/without films, and compared to that resulting from the Marangoni damping theory applicable to monolayers of particular surface viscoelasticity. The agreement between the theory and experimental data was satisfactory. As shown in at-sea experiments performed with a free-floating, buoy-like acoustic system, and an artificial oil slick spread over the Baltic Sea surface, the film’s rheological surface properties can be recovered from acoustic surface probing, as well as oil spill edge detection. Simultaneous statistical analyses of the scattered signal amplitude distribution parameters turned out to be unequivocally related to the oil substance fraction weight, oil layer thickness, and the form of oil contamination.
Privacy-Preserving Payment Splitting
Authors: Eskandarian Saba , Christodorescu Mihai , Mohassel Payman
Published: May 2020

Widely used payment splitting apps allow members of a group to keep track of debts between members by sending charges for expenses paid by one member on behalf of others. While offering a great deal of convenience, these apps gain access to sensitive data on users’ financial transactions. In this paper, we present a payment splitting app that hides all transaction data within a group from the service provider, provides privacy protections between users in a group, and provides integrity against malicious users or even a malicious server.

The core protocol proceeds in a series of rounds in which users either submit real data or cover traffic, and the server blindly updates balances, informs users of charges, and computes integrity checks on user-submitted data. Our protocol requires no cryptographic operations on the server, and after a group’s initial setup, the only cryptographic tool users need is AES.

We implement the payment splitting protocol as an Android app and the accompanying server. We find that, for realistic group sizes, it requires fewer than 50 milliseconds per round of computation on a user’s phone and the server requires fewer than 300microseconds per round for each group, meaning that our protocol enjoys excellent performance and scalability properties.
A Framework of Metrics for Differential Privacy from Local Sensitivity
Authors: Laud Peeter , Pankova Alisa , Pettai Martin
Published: May 2020

The meaning of differential privacy (DP) is tightly bound with the notion of distance on databases, typically defined as the number of changed rows. Considering the semantics of data, this metric may be not the most suitable one, particularly when a distance comes out as larger than the data owner desired (which would undermine privacy). In this paper, we give a mechanism to specify continuous metrics that depend on the locations and amounts of changes in a much more nuanced manner. Our metrics turn the set of databases into aBanach space. In order to construct DP information release mechanisms based on our metrics, we introducederivative sensitivity, an analogue to local sensitivity for continuous functions. We use this notion in an analysis that determines the amount of noise to be added to the result of a database query in order to obtain a certain level of differential privacy, and demonstrate that derivative sensitivity allows us to employ powerful mechanisms from calculus to perform the analysis for a variety of queries. We have implemented the analyzer and evaluated its efficiency and precision.
Listen Only When Spoken To: Interpersonal Communication Cues as Smart Speaker Privacy Controls
Authors: Mhaidli Abraham , Venkatesh Manikandan Kandadai , Zou Yixin , Schaub Florian
Published: May 2020

Internet of Things and smart home technologies pose challenges for providing effective privacy controls to users, as smart devices lack both traditional screens and input interfaces. We investigate the potential for leveraging interpersonal communication cues as privacy controls in the IoT context, in particular for smart speakers. We propose privacy controls based on two kinds of interpersonal communication cues – gaze direction and voice volume level – that only selectively activate a smart speaker’s microphone or voice recognition when the device is being addressed, in order to avoid constant listening and speech recognition by the smart speaker microphones and reduce false device activation. We implement these privacy controls in a smart speaker prototype and assess their feasibility, usability and user perception in two lab studies. We find that privacy controls based on interpersonal communication cues are practical, do not impair the smart speaker’s functionality, and can be easily used by users to selectively mute the microphone. Based on our findings, we discuss insights regarding the use of interpersonal cues as privacy controls for smart speakers and other IoT devices.
Perspective: Physiological Benefits of Short-Chain Fatty Acids from Cereal Grain Fibre Fermentation and Metabolic Syndrome
Authors: Havensone Guna , Meija Laila , Lejnieks Aivars
Published: May 2020

Currently, intervention studies in humans have demonstrated that dietary fibre and whole grain consumption increase gut bacterial diversity. However, low-fibre intake drives depletion of the human gastrointestinal microbiota and indirectly stimulates metabolic abnormalities linked to metabolic syndrome insulin-resistance and abdominal obesity. The aim of the current paper was to summarise current evidence for the effect of consumption of cereal fibres on gut microbiota composition and their metabolites. By increasing the daily consumption of cereal fibre, the gut micro-biota diversity should have positive impact on the host’s health.
T-Cell Lymphoma Misdiagnosed as Crohn’s Disease: Case Report
Authors: Straume Zane , Māliņa Justīne , Proskurina Anna , Nazarovs Jurijs , Derovs Aleksejs , Dubois Patrick
Published: May 2020

For many years, there has been a concern that inflammatory bowel disease carries an increased lymphoma risk. At the same time, patients with intestinal lymphomas are occasionally misdiag-nosed as having Crohn’s disease. We report a case of T-cell lymphoma of the bowel misdiag-nosed as Crohn’s disease, which illustrates the diagnostic challenges posed by peripheral extranodal lymphomas. A 68-year old female presented with clinical symptoms (diarrhoea, abdominal pain, poor appetite and significant weight loss), and colonoscopic and initial histological findings that were similar to inflammatory bowel disease. She was diagnosed with Crohn’s disease and received treatment with sulfasalazine with subsequent improvement of symptoms. Eight months after the initial diagnosis the patient experienced sudden abdominal pain. Laparotomy revealed necrosis in the small and large intestine and ileostomy was performed. On day 10 of a complicated postoperative period the patient died. Post-mortem histopathological examination of small and large intestine revealed highly malignant peripheral T-cell lymphoma, not otherwise specified. Differentiation of intestinal T-cell lymphoma from Crohn’s disease continues to be a challenge, because clinical, colonoscopic, radiological and histopathological findings can mimic Crohn’s disease. Careful multi-disciplinary assessment and knowledge of this rare disorder is crucial for timely diagnosis.
1. Period Influence on the Work of Johann Sebastian Bach
Authors: Medňanský Karol
Published: May 2020

The work of Johann Sebastian Bach (1685 - 1750), significantly influences the work of the contemporary composers even almost 270 years after his death. It is undoubtedly caused also by the fact that by his work Bach impersonates contemporary musical tradition. There are the three most significant areas in his work – the influence of family tradition on his work, which we can observe throughout the Thuringia, where they have had a significant musical position for 200 years in all the areas of music – secular, urban, spiritual and ecclesiastical. The tradition of German music is not less important. It influenced Johann Sebastian Bach during his studies and was based directly on the essence of protestant educational principle. Filip Melanchton, the most significant collaborator and a friend of Martin Luther, was contributory in the reform of this principle. The most important is the influence of Luther’s Reformation on the spiritual world of J. S. Bach, which reached such dimensions that he unites theology and music. Under the influence of the aforementioned three areas, the work of Bach has acquired exceptional artistic and spiritual quality, a unique phenomenon in the history of music.
6. Teaching Strategies Employed to Approach a Postmodern Opus. Recital I (For Cathy) by Luciano Berio
Authors: Iațeșen Loredana Viorica
Published: May 2020

The difficulties encountered by any history of music teacher when tackling postmodern repertoire is a well-known fact. Doubts are only natural. For instance, of the innumerable creators belonging to different cultures, which would be the relevant composers? Furthermore, when finally choosing one representative, on which of his/her works should one focus? And after one particular piece of selected, what is the best way to teach the scientific arguments required for its perception? When the chosen opus fails to distinguish itself through the direct expressiveness of its language, what should one do? What are the works of music considered to be exquisite in terms of technique and expression, with an actual impact on the teaching field? This approach is all the more tedious as the specialized teacher is faced with the lack of any immediate feedback about the importance of some music, as the biggest impediment is the music score itself, which becomes gradually accessible, after numerous auditions and explanatory comments. Therefore, the purpose of this research was to achieve the teaching approach of an opus with direct expressiveness composed during the last decades of the last century: Recital I for Cathy by Luciano Berio. An innovative mezzo soprano and 17 instruments score, which promotes the subtleties existing either in the relationship between themes, dramaturgy and language, or in the correspondence between text and sonority. These are some of the aspects that we intend to tackle in order to help our students understand the postmodern phenomenon by means of Berio’s inclusive and synthetic vision. In order to ground our scientific approach, we rely on the well-known quotation technique used by the creator, which, by recalling apparently disparate music, facilitates the process of didactic demonstration. The actual quotation or allusion to different sonorities constitutes a challenge in discovering the general and particular meanings of sound dramaturgy, but especially the deep meanings of the emotional reception of the opus.
9. Personal Conception on the Way of Interpreting the Area from Act I of the Opera La Bohéma – Si, Mi Chiamano Mimì by Giacomo Puccini
Authors: Ursachi Doina Dimitriu
Published: May 2020

Giacomo Puccini’s artistic creation spans a period of 40 years, from 1884 to 1924, during which time he composed 12 works. This small number proves once again the great artistic exigency of the composer. The enormous success that Giacomo Puccini’s works have enjoyed since his life, continues to this day and is constantly growing. We aim to analyze the area SI, MI CHIAMANO MIMÌ from LA BOHÉMA’s work with personal interpretative aspects.
2. Motility in Sport-Artistic Activities – A Social Phenomenon
Authors: Leșe Ana-Cristina
Published: May 2020

The history of Physical Education reports us that the physical exercises have emerged and have been perfected in accordance with the social order, evolving in direct relation with it. During this paper we will define the phenomenon of Physical education and sport as a discipline of academic education, starting from the general notions to the particular ones in the general physical training of the student actor. In this paper we try to highlight some similarities between the preparation of the actor and the preparation of the athlete for professional performance. We will present the theoretical framework with well-defined and accepted notions in both sports and theater. We will subsequently present the particular framework in which the theoretical principles in the sports field are taken over by the university theater programme and put into practice for the general preparation of the future actor. The article closes with the selection of some basic conclusions and recommendations appropriate to the topic under discussion
3. The Graphic Communication Actor: Generating Visual Rhetoric for Development Initiatives
Authors: Ebigbagha Sylvester Zifegha
Published: May 2020

The art of using language for public expression in order to persuade target audience to support development initiatives is a key reason for graphic communication. This requires communication actors particularly, the graphic encoder to know salient input and output variables of communication for effective mediation. However, the prevalence ignorance of these variables, often results in ineffective media production that is counter-productive to development. Therefore, this paper focused on production of practical rhetoric in graphic language for development programmes. The paper employed the critical-historical-analytic examination and content analysis methods. It introduced the reader to the need for practical rhetoric in visual communication. Furthermore, it highlighted the salient input and output variables that the graphic communication actor need be conversant with in order to produce visual rhetoric, using the McGuire’s Communication/persuasion Matrix. And it exemplified graphic media that result from application or neglect of the knowledge of the variables. The paper found that consideration of the variables afforded production of effective rhetoric in graphic language. The paper ended with the need for graphic encoders to internalize knowledge of the input and output variables and utilize it during the process of media production to generate visual rhetoric with desired effect.
4. Musical Skills in the Artistic Knowledge Process
Authors: Crișciuc Viorica
Published: May 2020

The article hereby includes conceptual aspects of the musical competences formation. It describes the realization of this process operating with the concepts of well-known occidental, Russian and local researchers. One of the ideas characteristic to the researchers’ pedagogical thinking is that, during the process of musical competence formation through art, the acquisition process mechanism is happening. For integrity in insuring the practical realization at of a musical education, the methodology we propose is based on research, an imposing theoretical network of successful pedagogical practices of remarkable scientists from all over the world. The analyzed theories are a source of inspiration and constitute the theoretical universe which contributes to as truthful as possible musical education.
Thromboelastography in pre-surgery monitoring in Hemophilia A with high inhibitor titer: case report and literature review
Authors: Melen Brinza , Uscatescu Valentina , Gheorghe Georgiana , Chiriac Elisabeta , Ciobanu Claudia , Orban Horia , Coriu Daniel
Published: May 2020

The development of factor VIII inhibitors (allo-antibodies) continues to be a major complication in the management of severe forms of hemophilia A, especially as far as treatment and treatment response monitoring is concerned. The need to implement a reliable laboratory assay is all the more obvious if major surgery occurs, when conventional tests (activated partial thromboplastin time APTT, prothrombin time PT, factor VIII level) are of no avail and there is a very fragile balance between bleeding and thrombosis.

We report the case of a 32 year-old patient diagnosed with severe Hemophilia A, referred to the Comprehensive Center for the Diagnosis and Treatment of Hemophilia of the Fundeni Clinical Institute for a multidisciplinary assessment in view of a total left hip arthroplasty due to aseptic necrosis of the femoral neck.

Workup showed a high inhibitor titer (>200 BU). Taking into consideration the interindividual variability of the response to bypassing agents, as well as the bleeding risk associated with a major orthopedic surgery, we used thromboelastography (TEG) to assess the patient’s response to aPCC (activated prothrombin complex concentrate) and rFVIIa (activated recombinant factor VII). The findings helped select the optimal replacement scheme to ensure perioperative hemostasis.
Influence of No-Till Technology on Reducing Soil Degradation During Sorghum Cultivation
Authors: Kabelka D. , Kincl D. , Vopravil J.
Published: May 2020

Soil degradation and water erosion are undoubtedly serious global problems. Moreover, excessive surface runoff and the lack of water in landscape are problems encountered not only in the Czech agricultural land. This condition is unsustainable in the long-term and it is necessary to find, verify and quantify suitable agricultural methods for reducing soil degradation. In this study, we tested two soil conservation technologies for sorghum (Sorghum bicolor) cultivation. Our results show that erosion was reduced by more than 78% (no-till) and 89% (no-till: narrow row) in rainfall simulation on naturally moist soil compared to conventional cultivation. Also, the use of conservation technologies reduced surface runoff (52% no-till, 68% no-till: narrow row). Sorghum has similar agronomic requirements as maize but it has the advantage of a good dryness tolerance and a high water use efficiency. The two-year research (2014, 2017) took place in the Central Bohemian Region. Soil degradation was verified using a rainfall simulator. The results have shown that both no-till technologies have a significant (P < 0.05) soil conservation effect.
Infrared Thermography Diagnostics of Air Permeability Through Building Openings – Assessment of its Reliability
Authors: Bielek Boris , Szabó Daniel , Čurpek Jakub , Suchánek Peter , Panáček Pavol
Published: May 2020

The presented paper deals with an analysis of the reliability of a diagnostic method of air permeability through building openings (windows, doors, glass walls) by the application of infrared thermography. A test sample of a plastic double casement window was experimentally tested for air permeability and watertightness in a large pressure chamber. Different levels of the tightness were adjusted between the casement and frame part of the window. Additionally, the window test sample was measured in the large climate chamber with variant air pressure differences. Moreover, the surface temperatures were measured on the window by thermocouples and subsequently compared with images directly taken by infrared thermography. The effect of the increased air infiltration can be detected by infrared thermography but cannot quantify the overall air permeability of the window. The distribution of the exterior window surface temperature is influenced by several factors which should be taken into consideration in the final assessment of the window.
Non-Linear Analysis of an RC Beam Without Shear Reinforcement with a Sensitivity Study of the Material Properties of Concrete
Authors: Sucharda Oldrich , Mateckova Pavlina , Bilek Vlastimil
Published: May 2020

A detailed analysis of concrete structures requires knowledge of the mechanical properties of the materials used. In the case of a non-linear analysis, the scope of the information needed is even greater. In particular, the tensile strength and fracture-mechanical parameters are required for the concrete. Prospective approaches that could increase the informative value of detailed analyses include the use of stochastic modelling. It particularly enables the definition of the effects of individual input parameters on the load capacity, failure mode, and general behaviour of the structure. The presented paper aims at a detailed analysis of a reinforced-concrete beam without shear reinforcement, which is based on a complex set of laboratory tests and non-linear analyses with a sensitivity study. The laboratory program includes different types of laboratory tests. Selected and missing material parameters of the concrete are calculated according to recommendations in scientific papers and the valid standards. The results are compared and discussed.
The Symbolic Stakes of an Academic Degree. Reconfigurations of Power Relationships and New Tensions Within the Nursing Profession
Authors: Toffel Kevin
Published: May 2020

The opening in 2009 at the University of Lausanne of a master’s degree program marked a new stage in the history of the profession in Switzerland. With new resources, the emergence of these nurses disrupting professional relationships, both with respect to doctors as well as within the profession. After having presented the issues of making knowledge more academic and more scientific in every sense, we show some effects of this diploma, in particular the attempt of redefinition of the practical and symbolic roles to which it gives rise.
Performance of Quiet Helicopter
Authors: Stanisławski Jarosław
Published: May 2020

Noise generated by helicopters is one of the main problems associated with the operation of rotorcrafts. Requirements for reduction of helicopter noise were reflected in the regulations introducing lower limits of acceptable rotorcraft noise. A significant source of noise generated by helicopters are the main rotor and tail rotor blades. Radical noise reduction can be obtained by slowing down the blade tips speed of main and tail rotors. Reducing the rotational speed of the blades may decrease rotor thrust and diminish helicopter performance. The problem can be solved by attaching more blades to main rotor. The paper presents results of calculation regarding improvement of the helicopter performance which can be achieved for reduced rotor speed but with increased number of rotor blades. The calculations were performed for data of hypothetical light helicopter. Results of simulation include rotor loads and blade deformations in chosen flight conditions. Equations of motion of flexible rotor blades were solved using the Galerkin method which takes into account selected eigen modes of the blades. The simulation analyzes can help to determine the performance and loads of a quiet helicopter with reduced rotor speed within the operational envelope of helicopter flight states.
Body Training Systems of Stage Movement Courses, in the Drama School of Iasi City
Authors: Florentin Alice-Ioana , Florentin Emanuel
Published: May 2020

The contemporary choreographic movement of the 21st century may be viewed as a true patchwork of performance techniques and styles; a build-up of movements taken from established techniques, with elements of drama, ballet, improvisation and other connected disciplines. These challenges may be met only by a multi-technical and multi-stylistic approach in the training of future actors and choreographers. The transition from the everyday body to the theater body is the result of a process based on self-knowledge, documentation and practice.
Mime Language. From Singularity To Community
Authors: Mateiciuc Ioan
Published: May 2020

This article approaches the subject of theatrical language in mime, aiming to identify the mechanisms and resources of stage performance, referring itself to the silence/speech binomial. Can mime impose a valid theatrical language? Will a type of structuralism, through a reduction of complexities, manage to encompass the essence of the implications of stage acting within social structures? We will see the extent to which theater can trace a pattern of collective mime language socially and the extent to which such an approach will manage to encompass the interaction of the mind with an external reality, while also analysing the ability of the performer – when the latter understands their own mind or creates maps of their own mind or of the community – to create a sort of cognitive empathy, resulting in an extraction of a theory of collectivity, which is, most often, ignored in such a cultural performance as mime, and its protagonists may or may not find a place in a social mind.
Necessary and Sufficient Conditions for Oscillatory and Asymptotic Behaviour of Solutions to Second-Order Nonlinear Neutral Differential Equations with Several Delays
Authors: Santra Shyam Sundar
Published: May 2020

In this paper, necessary and sufficient conditions are obtained for oscillatory and asymptotic behavior of solutions to second-order nonlinear neutral delay differential equations of the form

d

d
t

[

r

(
t
)

[

d

d
t

(

x

(
t
)

+
p

(
t
)

x

(

t
-
τ

)

)

]

α

]

+

∑

i
=
1

m

q

i

(
t
)

H

(

x

(

t
-

σ

i

)

)

=
0
 
 
 
for
 
t
≥

t

0

>
0
,

{d \over {dt}}\left[ {r\left( t \right){{\left[ {{d \over {dt}}\left( {x\left( t \right) + p\left( t \right)x\left( {t - \tau } \right)} \right)} \right]}^\alpha }} \right] + \sum\limits_{i = 1}^m {{q_i}\left( t \right)H\left( {x\left( {t - {\sigma _i}} \right)} \right) = 0\,\,\,{\rm{for}}\,t \ge {t_0} > 0,}

under the assumption ∫∞(r(n))−1/αdη=∞. Our main tool is Lebesque’s dominated convergence theorem. Further, some illustrative examples showing the applicability of the new results are included.
CARACTERIZAÇÃO DOS FATORES DE RISCO CARDIOVASCULARES ENTRE GRADUANDOS DE ENFERMAGEM
Authors: Souza Cristiana Aparecida Pedra de , Gonçalves Jovania Aparecida , Monteiro Cristiane Aparecida Silveira , Silva Andressa Fernanda
Published: May 2020

Objetivo: Caracterizar os fatores associados ao risco cardiovascular entre os estudantes do curso de enfermagem bem como identificar os dados sociodemográficos dos acadêmicos, o consumo alimentar, os hábitos de vida diária, a prática de atividade física dentre outros. Métodos: trata-se de um estudo transversal, descritivo, com abordagem quantitativa dos dados, que foi realizado entre universitários do curso de graduação em enfermagem. Os dados biopsicossoais e clínicos foram coletados pelos pesquisadores com utilização de um instrumento e medidas clínicas (pressão arterial, dados antropométricos) entre estes estudantes. O estudo foi aprovado junto ao Comitê de Ética (40096114.6.0000.5137). A análise de dados foi realizada por meio da utilização de estatística descritiva, demonstrando as frequências absolutas e relativas. Resultados: a maioria dos estudantes (87%) foi do sexo feminino, 9% deles eram sedentários, foram encontrados em 32% sobrepeso ou obesidade, no que se refere a relação cintura-quadril 36% tiveram o resultado alto ou muito alto. Sobre as doenças já diagnosticadas, 2% dos graduandos relataram os diagnósticos de hipertensão arterial e 13% o de dislipidemia. Já na avaliação do consumo regular de álcool foi relatado por 51% dos estudantes. Conclusão: a mudança de hábito e de comportamento requer esforço coletivo, como políticas de saúde mais abrangentes que objetivem a valorização de comportamentos saudáveis.
After the event: Debrief to make a difference
Authors: Austin Diana
Published: May 2020

No description supplied
Rousseau, theorist of constituent power
Authors: Colon-Rios Joel
Published: May 2020

© The Author 2016. Rousseau has always had an uncertain relationship with the theory of constituent power. On the one hand, his distrust of political representation and support for popular sovereignty seem consistent with the idea of the people as a legally unlimited constitution-maker. On the other hand, if, from those views about representation and sovereignty, it follows that Rousseau is a proponent of direct democracy, then there seems to be no place in his thought for a theory that presupposes, above all, a separation between those who exercise a delegated authority (eg legislators) and those who possess an original constitution-making power (the people). In a legal order in which all laws must be directly made by the people, such a separation is absent: the constituent and the legislative body are one and the same. It is therefore not surprising that Rousseau's name is largely absent from contemporary literature on constituent power. In this article, however, I will show that once Rousseau's particular conception of law, as well as his distinction between sovereignty and government, are properly understood, one finds in his work not only the first major formulation of the theory of constituent power, but also a careful exploration of its implications for actual constitutional practice.
Accreditation System of Distance Higher Education in the U.S. and Its Implications for China
Authors: Shen Xinyi , Wu Jianwei , Yang Yuanyuan
Published: May 2020

Distance higher education is an important component of the Chinese higher education. How to enhance the quality of distance higher education is one of the key issues to be addressed in the research areas of distance education and higher education. As a crucial step to quality improvement, the constitution of accreditation system in distance higher education balances the benefits of all parties involved. This paper explores the American accreditation system of higher education and distance education and concludes with suggestions for the constitution of the Chinese quality assurance system: 1) establishing third-party institutions to share part of the government roles; 2) constituting the accreditation system; 3) setting up appropriate standards; 4) publicizing results of quality assurance work; and 5) building internal quality assurance mechanism. This paper is aimed to provide some reference to the constitution of accreditation system of distance higher education in China, facilitate the solution of quality problems in distance education, and promote the continuous improvement and development of distance education in China.
Analysis on the Trend of International Economy and Trade Development under Cross-Cultural Exchanges
Authors: Wang Yueer
Published: May 2020

Under the influence of “Belt and Road”, the development of international economy and trading has improved drastically, which provided many help and support for domestic macroeconomic development under the new economic normal. Cross-cultural communication is a kind of customer service for different cultures. At this stage, under the cross-cultural exchange, the advantages of domestic and international economic and trade activities are constantly emerging. Plus, under the influence of the diplomatic thinking of seeking common ground while reserving differences, cross-cultural exchanges have greatly promoted the development of international economic trade. This paper will forecast and analyze the development trend of international economic trade under the cross-cultural exchange in the new era as well as put forward reasonable suggestions on how to improve international economic and trade development.
Structural Analysis of Factors Affecting Dairy Cattle Industry Development in Malaysia
Authors: Faghiri Hamed , Yusop Zulkornain , Hj Othman Mohdshahwahid , Eric Krauss Steven
Published: May 2020

Malaysian dairy cattle industry has not produced enough quantity of dairy products to satisfy domestic market needs. Various initiatives were made by the government to improve the industry output for more than five decades; however, the results are yet to be materialized. Indeed, Malaysia is still one of the highest milk and dairy products importing countries in the world in terms of overall volume and per capita. The objective of this study is to investigate the most important factors influencing the dairy cattle industry development in Malaysia. A quantitative approach involving Structural Equation Modeling is applied to achieve the aim of this study. After testing the validity and reliability (based on Cronbach’s alpha technique) of the original research instrument, the Structural Equation Modeling (SEM) is implemented to analyze the data by using Smart-PLS 3 software. The findings demonstrate that the factors such as adequate land allocation for dairy farming and animal feed plantation, climate condition, logistic costs, animal feed price and accessibility, poor cow breed, lack of well trained and experienced labors, lack of knowledge on dairy farming, government policies, and the inappropriate environment of the industry are among the most important factors affecting Malaysian dairy cattle industry growth. Industry stakeholders such as farmers, policymakers and researchers may benefit from this study. Results of this study can be used as the guidance and roadmap in their future development policies, plans, projects, and studies.
Procedure for forming nominal control program of solar sail spacecraft heliocentric movement using locally optimal control laws
Authors: Khabibullin R. M.
Published: May 2020

The paper is devoted to the non-coplanar interplanetary flight Earth-Venus of the spacecraft equipped with a solar sail. The goal of the heliocentric movement is to transfer a spacecraft with a non-perfectly reflecting solar sail into the Hill’s sphere of the Venus with zero hyperbolic excess speed. The magnitude and direction of acceleration is calculated taking into account specular and diffuse reflections, absorption and transmission of photons by the surface of the solar sail. One of the main tasks in the field of navigation and motion control of a spacecraft is the search for a simple energy-efficient control scheme for performing maneuvers during flight. These control schemes are locally optimal control laws, various combinations of which allow you to perform the necessary maneuvers during an interplanetary flight. The procedure for the formation of a control program for a non-coplanar interplanetary flight of the Earth-Venus type of a spacecraft with a non-perfectly reflecting solar sail is described. The results include the flight trajectory, the change in phase coordinates in time, graphs of changes in control angles, and the nominal control program. The obtained results satisfy all the boundary conditions described in the statement of the problem.
Growing semiconductor structures for high-performance solar cells in open space
Authors: Blinov V. V. , Vladimirov V. M. , Kushnarev N. A. , Nikiforov A. I. , Pridachin D. B. , Pchelyakov D. O. , Pchelyakov O. P. , Skorodelov V. A. , L. V. Sokolov
Published: May 2020

Practical space activities of the country in near-Earth space and in deep space have been developing for more than fifty years. During this time, many new scientific and technical problems were solved, the latest technologies were developed and mastered. This article describes the prerequisites for conducting an experiment on growing semiconductor structures for highly efficient solar cells in the conditions of orbital flight of an international space station. The advantages of carrying out the process in a deep vacuum formed as a result of the manifestation of the molecular screen effect are shown to obtain new thin-film materials with unique properties. A ground-based simulator of a space module and a working molecular screen prototype are described. The features of the preliminary design of a universal automated installation of molecular beam epitaxy in space are discussed. The rationale for the economic efficiency of space technology based on the absence of the need for expensive ultrahigh vacuum pumping facilities, cryogenic equipment and vacuum volumes containing a large amount of stainless steel is given. The experience of three orbital flights of the American Shuttle spacecraft is analyzed, confirming the economic feasibility of projects related to the production of semiconductor heterostructures in space flight conditions.
THE CONTROL FOR THE ACTIVITIES OF RELIGIOUS ORGANIZATIONS IN THE RUSSIAN FEDERATION
Authors: Mihaylenko Natal'ya , Bondar' Elena
Published: May 2020

This article analyzes the concept of control over the activities of religious organizations. The authors focus on certain provisions of the Federal Law “On Freedom of Conscience and on Religious Associations”, for example, one of which contains the following subject of control — the conformity of the activities of religious associations with their statutory goals.
FORMATION OF STUDYING LEGAL COMPETENCIES IN THE FIELD OF INTERNET COMMUNICATIONS
Authors: Polischuk Sergey
Published: May 2020

The article analyzes the formation of student legal competence in conditional rapid development technologies based on the basic pedagogical principles. Variants of new legal (information) competences are proposed.