bluuebunny/crossref_metadata_2025 huggingface dataset:
Self-healing properties of Hermite-Gaussian correlated Schell-model beams
Authors: Xu Zhiheng , Liu Xianlong , Chen Yahong , Wang Fei , Liu Lin , Monfared Yashar E. , Ponomarenko Sergey A. , Cai Yangjian , Liang Chunhao
Published: December 2019

We study theoretically and experimentally the influence of the obstacle position separation from the source on the self-healing capacity of partially coherent beams using Hermite-Gaussian correlated Schell-model beams as a case in point. We establish that the shorter the distance between the obstacle and the source plane and the longer the distance between the obstacle and the observation (receiver) plane, the better the self-healing capacity of the beams. In addition, a similarity degree between the reconstructed and original beams is introduced to quantify the self-healing capacity of partially coherent beams. The derived interesting results may find applications in optical information processing, image transmission, and recovery.
Hybrid organic small molecules as a saturable absorber for passive Q-switching in erbium-doped fiber laser
Authors: Salam Sameer , Al-Masoodi A. H. H. , Wang P. , Harun S. W.
Published: December 2019

This work demonstrates a Q-switched fiber laser by utilizing hybrid organic small molecules (HOSM) based on Tris-(8-hydroxyquinoline) aluminum (Alq3) and N,N′-Di(1-naphthyl)-N,N′-diphenyl-(1,1′-biphenyl)-4,4′-diamine (NPB) as a saturable absorber. The HOSM was embedded into poly(vinyl alcohol) and inserted into a fiber laser cavity to achieve pulsing at 1560.1 nm. The pulse repetition rate was tuned from 66.3 kHz to 109 kHz whereas the pulse width duration decreased from 6.3 µs to 2.2 µs as the laser diode power gradually increased from 56 to 262 mW. Then a tunable bandpass filter (TBF) was used to produce tunable wavelength operation. As the TBF was tuned, the wavelength of the Q-switched laser shifted continuously from 1519.6 nm to 1562.8 nm. The results show that HOSM could be an efficient, easy to fabricate, and inexpensive saturable absorber for generating single and tunable wavelength Q-switched fiber laser.
Ultrafast fiber lasers mode-locked by two-dimensional materials: review and prospect
Authors: Jiang Tian , Yin Ke , Wang Cong , You Jie , Ouyang Hao , Miao Runlin , Zhang Chenxi , Wei Ke , Li Han , Chen Haitao , Zhang Renyan , Zheng Xin , Xu Zhongjie , Cheng Xiangai , Zhang Han
Published: December 2019

The year 2019 marks the 10th anniversary of the first report of ultrafast fiber laser mode-locked by graphene. This result has had an important impact on ultrafast laser optics and continues to offer new horizons. Herein, we mainly review the linear and nonlinear photonic properties of two-dimensional (2D) materials, as well as their nonlinear applications in efficient passive mode-locking devices and ultrafast fiber lasers. Initial works and significant progress in this field, as well as new insights and challenges of 2D materials for ultrafast fiber lasers, are reviewed and analyzed.
Währungsabsicherung bei Immobilienaktien außerhalb des Euroraums
Authors: Memis Halil I. , Sebastian Steffen
Published: December 2019

Währungsschwankungen sind ein zusätzliches Risiko für Immobilieninvestitionen außerhalb des Europäischen Währungsraums. Grund hierfür ist, dass die Risiken aus Fremdwährungsanlagen in der Regel nicht durch den Markt entschädigt werden. Das macht ausländische Immobilienanlagen grundsätzlich weniger attraktiv. Die gewünschten Diversifikationseffekte globaler Immobilienanlagen können in diesem Fall durch Wechselkursrisiken überlagert und können infolgedessen zu verzerrten Entscheidungen hinsichtlich der Vermögensallokation führen. Der vorliegende Beitrag hat zum Ziel, die Abhängigkeit der Diversifikationseffekte von Immobilienanlagen durch die Absicherung des Fremdwährungsrisikos für den europäischen Investor aufzuzeigen. In Einklang mit den Erkenntnissen der empirischen Forschung reduziert die Berücksichtigung von Terminkontrakten das systematische Fremdwährungsrisiko. Das Ergebnis des Spanning-Tests deutet aus Euro-Sicht auf starke Diversifikationseffekte für internationale Immobilienanlagen durch die Einführung von Terminkontrakten hin. Zusammengefasst sind die Diversifikationseffekte von Immobilienanlagen maßgeblich davon abhängig, ob das Fremdwährungsrisiko abgesichert wird oder nicht.
International and African media’s representation of African Debt to China: From stereotype to solution with constructive journalism
Authors: Yanqiu Zhang , Machila Luu Mwiinga
Published: December 2019

Constructive journalism justifies its existence by an orientation towards solutions to vexing social issues. The central idea of this article is to discuss why constructive journalism could be an important approach for African journalistic practice. The research analyses African and international media reports on the China–Africa debt issue as a case study. It also discusses how the debt issue is depicted in online articles and reports from a content illustration of western, African and Chinese online media pools. Arguably so, there is a strong assumption that western and African media share more similarities than differences in representing Africa’s debt to China compared to their Chinese counterparts investigated in the study. In the framework of finding solutions and offering alternative journalistic perspectives, the study brings to light the fact that constructive journalism approaches, if applied by African media, have the potential to positively and objectively contribute to communication about the African debt with an inclination to solution-based applications. The study closes by a call to action for African media to be more responsible for their own image and to work towards a more balanced and focused coverage of not only the debt issue but other matters of international interest currently trending on the continent.
Los coyotes de Esopo: pedagogía, humanismo y traducción cultural en el colegio de Santa Cruz de Tlatelolco en las Fábulas en lengua náhuatl
Authors: Sanchis Amat Víctor Manuel
Published: December 2019

El artículo presenta el análisis de un caso concreto del momento inicial de transculturación pedagógica y traducción cultural propiciada por los colegios franciscanos de San José de los Naturales y Santa Cruz de Tlatelolco en el virreinato de la Nueva España a partir del estudio de la transmutación de los animales de la Fábulas de Esopo traducidas en lengua náhuatl. El trabajo parte de un comentario de los testimonios conservados y del valor pedagógico de la fábula en la época del humanismo y termina con un comentario de la fábula “El chivo y el coyote” con el que se ejemplifica el ejercicio de traducción cultural que maestros y discípulos llevaron a cabo en el estudio de Tlatelolco durante las décadas centrales del siglo XVI.
Multi-agent system for selecting images based on the gender and age
Authors: Martín Álvaro , Trejo David , Yagüe Alejandro , Sánchez José
Published: December 2019

This paper presents a multi-agent system that is able to search people on a database of images recognizing patterns of facial features on each person, based on the main features of the face (eyes, nose and mouth). Using that multi-agent architecture, the system can do the work faster applying Fisherfaces algorithm for the face recognition and classification. This technology can be used for several purposes like specific ads in each user group to suit better their interests or search for the age and gender of people that usually go to different places like malls or shops.
Desarraigo, confusión y transformación: un estado del arte sobre las ideas que tiene los jóvenes escolares del conflicto armado en Colombia
Authors: Mayorga Mendieta César
Published: December 2019

El artículo realiza un rastreo por las investigaciones que han abordado las ideas de los jóvenes escolares sobre el conflicto armado en Colombia. Para ello se emplea el estado del arte como metodología permitiendo diferenciarlas en tres grandes grupos; en primer lugar, aquellas que han servido como puente para entender, además del conflicto armado, otros procesos o conceptos, en segundo lugar, las que se enfocan en la transformación pedagógica desde la praxis y, en tercer lugar, las que poseen una visión amplia e integradora, superando los límites de la escuela. Por último, se presentan los hallazgos y los posibles aportes al campo desde el ámbito investigativo.
Objetos en mares de relaciones: experiencias de enseñanza de la Historia atlántica en museos
Authors: Limírio Chaves André , Lommez Gomes René
Published: December 2019

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Roles of Infection Prevention and Control Nurses (IPCNs) in Preparing for Emerging Infectious Diseases
Authors: Fitriyah Erna Tsalatsatul , Dwidiyanti Meidiana , Dwiantoro Luky
Published: December 2019

Background: Infectious diseases have become one of the world’s serious problems including in Indonesia. Infectious diseases can originate from the community and hospital environment. Health workers performing inappropriate medical procedures could also be a cause of transmission of infectious diseases. Infection prevention and control nurses (IPCNs) as the pioneers of prevention and infection control in hospitals have not optimally played their roles.   Purpose: This study aimed to explore the roles of IPCNs and their constraints in preparing for emerging infectious diseases. Methods: The present study employed a qualitative design with the hermeneutic phenomenological approach. The samples were seven IPCNs for the primary participants, and two Infection Prevention and Control Officers (IPCOs) and 13 Infection Prevention and Control Link Nurses (IPCLNs) as the triangulation participants. The data were collected using in-depth semi-structured interviews analyzed using a content analysis technique.   Results: The results identified two themes: (1) IPCNs played roles as clinical practitioners, activity coordinators, administrators, and educators, and (2) the roles of IPCNs had not been optimal due to the lack of support from the hospital management, insufficient infrastructure, weak monitoring and evaluation, and the unavailability of appropriate rewards and  punishment.Conclusion: The majority of participants in this study agreed that IPCNs had tried well to play their roles. However, various obstacles were encountered, which hindered the IPCNs in performing their roles.
Mindfulness Mobile Application Menurunkan Tingkat Stres Mahasiswa : A Literature Review
Authors: Ningsih Hasanah Eka Wahyu , Dwidiyanti Meidiana , Hartati Elis
Published: December 2019

Background: Stress among college students have been widely researched. The interventions such as mindfulness, meditation, relaxation and yoga using mobile application become most appealing choices to reduce stress. Technology is used as media to help implementing the interventions include mindfulness mobile application. It provides mindfulness steps and other features.Purpose: The aim of this paper is to evaluate previous research studies of mindfulness mobile application on decreasing stress level among college students.Method: Literature searches were conducted in October 2018. The search involved the utilization of the following online database: Google Scholar dan Medline. Keywords were “stress, mindfulness, and mobile application”. Searches were limited from 2008 to 2018 with paper in full-text and English language.Results: Four literatur were found which met inclusion and exclusion criteria. Three themes were identified: aplikasi mindfulness, framework penggunaan aplikasi, dan mengukur tingkat stres.  Conclusion: This review expands the knowledge in the area of stress reduction using mindfulness mobile application and calls for further research. The researchers should develop an application using mindfulness as the therapy to decrease stress level of college students. The institution or universities should utilize the findings of this review to promote training of mindfulness in managing the stressors or reducing stress through mobile application.
Efektivitas Konseling dengan Pendekatan Motivational Interviewing Terhadap Penurunan Depresi pada Pasien Post Stroke Depression
Authors: Apriani Baiq Nurainun , Hadi Irwan , Warongan Anwar Wardi , Supriyatna Nana
Published: December 2019

Background : Stroke is a serious global health problem, strokes can be threatening and result in morbidity and mortality and increase the length of days of treatment that cause maintenance costs to increase, stroke prevalence increases every year, followed by increased post-stroke depression. Motivational interviewing (MI) is a patient-focused counseling technique designed to help individuals explore and overcome ambivalence in behavior.Purpose : This study aims to determine the effectiveness of counseling with a motivational interviewing approach to reducing depression in post-stroke depression patients in NTB Province Hospital.Method : Quasi Experiment Pre-test design Post-test control group design with a sample of 32 respondents selected by purposive sampling technique.Results: The results of bivariate analysis with paired t test there were significant differences in post-stroke depression in the control group and the intervention group with a value of 0.028, in the intervention group the average depression was 2.25 with a value of 0.000 < α (0.05).Conclusion: Counseling with a motivational interviewing approach is effective in decreasing depression in post stroke depression patients at NTB Hospital. Suggestions for the next researchers can research with different places with more samples and qualitative and quantitative methods (mixed methods) so that research results are more optimal.
Perbedaan Tingkat Caregiver Burden Yang Merawat Lansia Demensia Di Panti Wreda
Authors: Triyono Heru Ginanjar , Dwidiyanti Meidiana , Widyastuti Rita Hadi
Published: December 2019

Background: The prediction of the number of elderly people in Indonesia will increase along with changes in Indonesia's demographic status. Elderly people who feel that at home less socialize with elderly people choose to live in a nursing home, this is an alternative for the elderly, elderly degenerative diseases are very diverse one of which is elderly dementia with dementia will require a level of dependence beyond the elderly who do not have dementia. Caregivers who treat the elderly with dementia will be very vulnerable to burden in treating elderly dementia.Purpose: The purpose of this study was to analyze the difference in the level of caregiver burden who care for elderly dementia at a nursing home.Method: This research method uses "Quasy experiment pre and posttest with control group". Number of samples 34 from each group. Data were analyzed using the Mann Whitney test with the help of SPSS 22.0 for Windows.Results: Research in the control group has a higher level of burden caregivers compared to intervention groups, this is because the control group respondents have lower wages than the city minimum wage, besides that the elderly characteristics carried out by nursing care have more severe dementia than the intervention group.Conclusion: The results of this study can be used as a reference in developing services for the elderly and elderly caregiver, especially the elderly who suffer from dementia.
Kualitas Hidup Suami Dengan Istri Yang Bekerja Sebagai Buruh Migran
Authors: Mu'in Muhammad , Isgiantika Erika O.D
Published: December 2019

Some Indonesian women have to work as migrant worker in foreign countries because of many reasons, especially economic problem. They should leave spouse and family to fullfill live needs. Husband and children, the closest people, is the most impacted and should adapt to inexistence of wife and/ or mother. This lead to disruption to all spouse and family dimensions of quality of life. This study aimed to describe quality of life among husband whose wife were migrant worker in foreign country who have 1-18 years children. The study conducted in a village in Kendal District, Central Java. Total sampling technique were taken consist of 75 husbands. The study showed that mean score of physical dimension of quality of life was 56, psychology 43, social 44 and environment 34. Some dimensions of quality of life illustrated in this study are expected to be the initial data for further research on the problems and needs of migrant workers' families as well as input for the development of programs to meet the needs of families left by their wives and / or mothers as migrant workers.
Effect of Temperature and Humidity on the Visibility of Mirage on the Runway of Sultan Iskandar Muda Airport, Aceh, Indonesia
Authors: Idris Nasrullah , Maswati Maswati , Usmawanda T. N. , Sari Arlin Maya
Published: December 2019

The relationship between temperature and humidity of the environment with visibility of mirage has been studied by observing mirage on the runway of Sultan Iskandar Muda International Airport (SIM) Aceh, Indonesia. Temperature and humidity data were obtained from the Blang Bintang Meteorological Station database, Aceh Besar, Aceh, Indonesia. The observation shows that the mirage has been found since 07.00 AM in the morning until the afternoon at 18.00 PM, even until sunset. Mirage is also still visible when the weather is cloudy or drizzling, but disappears when heavy rain. The lowest and highest temperatures where the mirage can still be observed are 26 0C and 32 0C, respectively. Meanwhile, the lowest and highest air humidities where mirages can still be observed are 51 % and 92 %, respectively. Observation shows that changes in temperature and humidity in the runway environment greatly affect the appearance and visibility of mirages. When the air temperature is high and the humidity is low, the mirage appears with high visibility (very thick), so that it can be observed clearly. Conversely, when the air temperature is low and the humidity is high, the mirage appears with low visibility (very thin) or almost non-existent or completely gone
Propagation loss on a Si-Slab Waveguide: Simulation revisited
Authors: Tresna Wildan Panji , Maruyama Takeo
Published: December 2019

Slab waveguide is one of the simplest types of optical waveguide, the confinement factor is only determined by the thickness of one side so that the propagation of light passing through it will be confined in the material. The slab waveguide is built from Si as the core material and SiO2 as the substrate. The use of various optical waveguides is very dependent on the objectives to be achieved in its application, for it is very important to know the characteristics of each optical waveguide. In this paper the writer wants to know the characteristics of a slab waveguide, specifically with regard to propagation loss. The simulation results show that the propagation loss in the slab waveguide design that the authors propose is around 0.1dB / mm in TE mode conditions. The occurrence of propagation loss in the simulation is likely due to imperfections in determining the effective material index in the design of the slab waveguide.
Synthesis of Zn-Fe nanoparticles using pulse laser ablation as a contrast agent in magnetic resonance imaging
Authors: Hikmantiyah Nurul , Hidayanto Eko , Khumaeni Ali
Published: December 2019

Synthesis of zinc oxide nanoparticles, iron oxide nanoparticles and Zn-Fe nanoparticles using pulse laser ablation method has been conducted. Experimentally, a pulse Nd:YAG laser (1064 nm, 7 ns, 35 mJ) was directed and focused on a metal plates of pure Zn and Fe, which are placed in the liquid medium of polyvinyl pyrrolidone (PVP). The PVP functions as a stabilizer agent. The results show that the produced nanoparticles have a spherical shape with an averaged diameter of Zn-Fe nanoparticles of 13 nm. FTIR and XRD test results of Zn-Fe nanoparticles show characteristics of Zn-Fe compounds. The examination of Zn-Fe nanoparticles as MRI contrast agents was carried out by varying the concentration of nanoparticles. Cenh calculation results showed the highest contrast enhancement occurred at a concentration of 1.25 mM with a value of 64.26% for T1 weighted images, and 81.52% for T2 weighted images. The SNR calculation results show the highest value at a concentration of 1.25 mM of 70.52 for T1 weighted images. The highest SNR value in the T2 weighted image at a concentration of 0.156 mM of 165.09.
Post-traumatic stress disorder or emergence phenomena? A case of psychomotor agitation after procedural sedation and analgesia
Authors: Jalali Alireza , Akbari Hamideh , Bahreini Maryam
Published: December 2019

Background

Psychomotor agitation can be problematic in an overcrowded emergency department (ED) during uncontrolled procedural sedation. Although emergence phenomena have been studied, various presentations may exist.

Case presentation

During procedural sedation, a 58-year-old man was sedated with a dissociative dose of ketamine in conjunction with propofol. His shoulder dislocation was reduced successfully but eventually, an exaggerated agitation occurred resembling a post-traumatic stress disorder (PTSD) flashback of past war scenes He was controlled by physical and chemical restraint with an intramuscular injection of 0.1 mg/kg midazolam. After resolution of sedation in rather stable psychiatric conditions, he left the ED with his relatives insisting for discharge against medical advice.

Conclusions

A PTSD flashback may occur from ketamine sedation in patients with a past history of military experience and can be a manifestation of psychologic adverse effects of ketamine.
Knowledge and attitude regarding reproductive and sexual health among school teachers: a descriptive survey
Authors: Sankhyan Aakanksha , Sheoran Poonam , Kaur Simarjeet , Sarin Jyoti
Published: December 2019

Background

Adolescence is a time of evolving from the immaturity of childhood into the maturity of adulthood. This is a stage which requires extra care and protection. Physiologically and physically, adolescents go through a series of transformations as they grow and develop.

Method

A descriptive study design was adopted with 70 teachers selected using a convenience sampling technique from five different government schools of the Ambala District, Haryana. Knowledge and attitude were assessed using a structured knowledge questionnaire and a 5-point Likert scale, respectively. The reliability coefficient of the structured knowledge questionnaire was found to be 0.67 by the Kuder-Richardson method and for the attitude scale, it was found to be 0.7 by Cronbach’s α.

Results

More than one third (37.1%) of the teachers were between 31 and 35 years of age. Out of 70 the majority (75.7%) of the teachers were female. More than half (62.9%) of the teachers had an average level of knowledge and the majority (71.4%) of the teachers had moderately favorable attitudes regarding reproduction and sexual health. Furthermore, teachers had more knowledge about the reproductive organs and the concept of puberty followed by the concept of reproductive and sexual health and had the least knowledge in the area of contraception.

Conclusion

This study highlights the need for special training and awareness programs regarding reproduction and sexual health among school teachers.
Palladium nanoparticles supported on nitrogen doped porous carbon material derived from cyclodextrin, glucose and melamine based polymer: promising catalysts for hydrogenation reactions
Authors: Sadjadi Samahe , Malmir Masoumeh , Léger Bastien , Monflier Eric , Heravi Majid M.
Published: December 2019

Melamine based polymer (MT) was prepared and then reacted with a mixture of glucose (Glu) and β-cyclodextrin (CD) under hydrothermal conditions to afford, MT/Glu-CD. Then, the adsorption of Pd salt was realized on MT/Glu-CD. The resulting compound was subsequently carbonized to furnish Pd/MT/C that exhibited high catalytic activity for the hydrogenation of nitroarenes in aqueous media. To elucidate the roles of CD, Glu, the molar ratio of Glu:CD and the carbonization in the catalytic activity, several control catalysts have been prepared and their performances for a model hydrogenation reaction were compared with that of Pd/MT/C. The results confirmed the importance of the carbonization as well as the presence of CD for achieving high catalytic activity. Moreover, it was found that the molar ratio of Glu:CD could affect the catalytic activity of the final catalyst and the optimum molar ratio of Glu:CD was 30:70. The recycling test as well as measurement of Pd leaching demonstrated high recyclability and low Pd leaching of Pd/MT/C.
Entropy on noncompact sets
Authors: Cánovas Jose S.
Published: December 2019

In this paper we review and explore the notion of topological entropy for continuous maps defined on non compact topological spaces which need not be metrizable. We survey the different notions, analyze their relationship and study their properties. Some questions remain open along the paper.
Rehabilitation, Guidelines, and Exercise Prescription for Lower Limb Amputees
Authors: Wilhoite Sydni , Williams Shonterious , Cook Jordan , Ryan Greg
Published: December 2019

Exercise is important for optimal recovery and quality of life for lower limb amputees. General guidelines for training to improve quality of life, gait retraining, and attenuation of risk factors for lower limb amputees will be outlined. Exercise prescription outlined in this column for lower limb amputees is based on the amputee's progress and stage of rehabilitation.
Live streaming at international academic conferences: Ethical considerations
Authors: Parncutt Richard , Seither-Preisler Annemarie
Published: December 2019

Anthropogenic global warming (AGW) and the long tradition of political failures to address it have created an unprecedented global crisis. Individual carbon footprints are higher in industrialized countries; in that context, academics contribute substantially by flying to conferences. How and why should the global academic community respond to this situation? We evaluate the seriousness and urgency of AGW, consider relevant ethical theory, and compare possible academic strategies, focusing on communication technologies in conference culture. We argue that academic privilege facilitates climate action. Academics are well placed to understand and explain complex material including relevant ethical theory. Academics are extensively networked with local, regional, and international students and colleagues. Academics can significantly reduce their greenhouse-gas (GHG) emissions by avoiding flying to conferences and developing low-GHG conference formats. Academic leadership is needed to courageously address the moral issues and take advantage of modern internet-based communication technologies. Social equity issues are also relevant. International conferences that include live streams are more global and accessible (independent of each participant’s finances), and hence more culturally diverse. Video recordings complement existing academic documentation, communication, and dissemination. Individuals can reduce their carbon footprint by focusing on regional conferences, contributing remote presentations to distant events, and by contributing to political discussions—putting pressure on governments, institutions, and corporations to change. By combining individual action with social leadership, academic climate action may significantly reduce future the environmental damage and human impact of AGW.
From Tusk to Town
Authors: Coutu Ashley , Damgaard Kristoffer
Published: December 2019

This article investigates the nature of usage, as well as the geographical origin, of a small group of ivory artifacts recently discovered in the earliest exposed cultural depositions at the Early Islamic (650–1100 C.E.) port of Aylah (Aqaba, Jordan). In addition to explaining the finds and the significance of their context for interpreting possible historical implications, the article uses a range of techniques to learn more about the raw material. In combining archaeological, visual, and biomolecular analyses on these ivories, fresh perspectives are provided that shed new light on the infrastructure and geographical scope of late antique and early medieval trade systems. Moreover, it informs us about the economic and commercial roles played by Red Sea ports in this period and highlights the potential of analyzing organic artifacts from sites in the region to reveal new details and characteristics of historical Indian Ocean trade networks.
SEASONAL AND SPATIAL VARIATION OF PM10 IN AN URBAN AREA FROM ROMANIA
Authors: BĂLĂNICĂ DRAGOMIR MARIANA CARMELIA , MUNTENIȚĂ CRISTIAN , SIMIONESCU AUREL GABRIEL , ZECA DANIELA ECATERINA , KRAMAR IRYNA , MARYNENKO NATALIIA
Published: December 2019

The cyclic variance of PM10 mass concentration in the urban area in the South-East of Romania has been analysed in the article. SE of Romania is considered to be a territory which has medium level of pollution for a period of last ten years, from 2009 to 2018. The spatial dispersion of PM10 concentration was obtained using the METI-LIS soft wear for each season. The objective of dispersion models is to evaluate how pollutant concentration is spread out taking into account the diffusion. The average measurements of PM10 and meteorological parameters as inputs has been used. An evident seasonal change of PM10 concentrations is observed in the article. In order to establish national measures for the improvement of the atmospheric pollution control it was analysed the mechanism of atmospheric pollution. It was observed that the air quality was overall better in spring and in summer in comparison to the other two periods. With regard to the seasonal variation characteristics of PM10 significant differences for the air quality registered in different months in the researched region were observed. The impact of air temperature on atmospheric pollution was insignificant in spring and autumn; moreover, precipitation was defined as an important influence factor upon the atmospheric pollution. The impact of precipitation on the possibility of atmospheric pollution was obviously different in the four seasons. The research results indicate the meteorological parameters that influence the air pollution become active during the cold seasonal days. It was shown that relative humidity and wind speed are the meteorological parameters that impact the PM10. It was found out that the probability of atmospheric pollution decreased with the increase of air temperature in summer. The research results also testify that the air pollution mapping could be enhanced using atmospheric dispersion models and in-situ measurements.
The development of the tourist sphere of Ukraine and Zaporizhzha region based on the cluster approach
Authors: Golovkova Liudmyla S. , Yuhnovska Yuliya O.
Published: December 2019

The research is designed to analyze the development of the tourism industry in Ukraine and its regions based on a cluster approach. The following research methods have been used in order to achieve this goal: dialectical method, analysis and synthesis (when forming the algorithm of the development of tourism industry of the region on the basis of a cluster approach), graphic method (to illustrate the results of the study); system-structural and expert analysis (for determining the composition of organizations of the tourism cluster of Zaporizhzhya region). This article explores the current state of the formation and development of the tourism industry of Ukraine and Zaporizhzhia region based on a cluster approach, as well as perspectives, advantages and problem solving by clustering the tourist industry of Ukraine and its separate regions. The analysis of the development of regions of Ukraine requires the use of new modern approaches in shaping and developing the potential of the tourism industry of the country and its regions, which we believe involves the formation of cluster associations of business entities in a certain region of the country. The algorithm of the formation and development of the tourism industry of the region based on a cluster approach is proposed; the structure of a tourism cluster of the region is proposed, which, unlike the others, should include enterprises (organizations, firms) that are geographically close, the tourism infrastructure, local labour markets, and a tourism product, which is a direct geographical and historical component of the region; a targeted model for the formation of a tourism cluster in Zaporizhzhya region is proposed, which, unlike the existing models, will facilitate the development of the existing models and the creation of new types of tourism (industrial tourism, therapeutic and recreational tourism, adaptive tourism and active recreational activities). Using the above suggestions will allow the management at various levels of the governance of the tourism cluster of Ukraine, and Zaporizhzhia region in particular, to take scientifically grounded and organizational decisions on the formation and the development of the tourism industry on the basis of a cluster approach, improve the economic situation (which is characterized by the lack of coordination of actions , which adversely affects the results of activities of the entire tourism industry of the country, obstructs the holding of joint festivals, exhibitions, etc., hampers marketing and scientific investigation, progress being held back by the lack of sufficient funding, the lack of qualified personnel of the given specialty, lack of managerial knowledge and the necessary information resources) through the establishment of interaction and cooperation.
Scientific-practical approaches to justification of location of quick service restaurants
Authors: Hladkyi Oleksandr , Rasulova Alla , Rasulov Ramis , Stefurak Vitalii
Published: December 2019

Research on specifics of selecting locations for QSR and assessing their potential is becoming increasingly vital in the conditions of high uncertainty and risks associated with the restaurant business. Therefore, the investigation of theoretical and applied fundamentals for justifying factors influencing the choice of QSR location is becoming more urgent. The aim of this investigation is to consider the development of recommendations on the ways of applying the above mentioned fundamen- tals .Decisions on deployment of the operating system of service facilities including restaurants are strategic in nature. The key factors affecting location of projected QSR can be divided into general and specific, which consider the requirements for the territorial location of the facility in the city/area and the development site. Among them are: proximity to residential areas and other objects necessary for potential employees and consumers; availability, capacity and significance of transport routes, vehicle speed; volume of transportation of potential consumers, convenient access roads; composition and territorial dispersion of a cluster of product form and territorial com- petitors; availability of a high-professional competitive supply network; availability and proximity to traffic generators (magnets); size, configuration, relief and other technical features; its visibility; zonal restrictions (norms for development of the territory, consistency with neighbouring objects, possibility of organizing a parking lot); appropriate format of quick-service; possibility of reconstructing leased premises. Important variables in the decision to choose a QSR location include analysis of: 1) the routes of potential customers, their initial and final destination before/after visiting a QSR with «HOUSE», «WORK», «SHOPPING (ENTERTAINMENT) « AND OTHERS» being most decisive; 2) the size of the QSR’s commercial area defined as the distance customers are mentally prepared to cover for visiting a restaurant; 3) focal distance providing division of the commercial area into sectors of 5, 10, 15, 20 and 30 minutes of accessibility and showing contribution of the inhabitants of each sector to the overall structure of the QSR sales; 4) existing and potential generators of QSR customer flows, requirements for their mutual location. When choosing a QSR location it is necessary to provide a realistic assessment of the market opportunities and threats to the QSR’s further development; take into account sector speci- ficity in determining the intensity of competition and market capacity; analyze flows of customers; substantiate the focal distance and the size of the QSR’s commercial area; consider generators of QSR customer flows and specifics of their mutual placement.
Palynological data on the description of the Gelasian and Calabriane analogues in the strato- type section of the Kuyalnik deposits near Kryzhanivka village (Odessa region)
Authors: Sirenko Olena A.
Published: December 2019

The state of paleontological study of the Kuyalnik deposits of Odessa region,   in particular the stratotype section near Kryzhanivka village was analyzed. Attention is paid to the absence of the palynological description of the Krizhanivka climatolith in the section and the insufficient palynological study of the liman-marine Kuyalnik sediments. The goal of the presented research was to obtain a detailed palynological description of the subaerial Eopleistocene and the liman- marine Kuyalnik sediments of the stratotype section near Kryzhanivka village. Based on the results of the research, the palynological description of rocks of the upper part of the section of the liman-marine Kuyalnik sediments is presented for the first time, as well as the materials to substantiate the correlation of the studied sediments with the Beregove and Siversk climatolyths of the continental Upper Cenozoic section of Ukraine, which correspond to the Gelasian of the International Stratigraphic Scale (ISS). For the first time, palynological description of the Kryzhanivka climatolith correlated with the Calabriane of the ISS is presented for the studied section. Three subcomplexes are described in the composition of the Kryzhanivka complex. The characteristic features of the Kryzhanivka spore-pollen complex (SPC) and the changes in the ecological structure of each subcomplex are determined. Correlation of the established complex with the even-aged SPC of the Kryzhanivka deposits of the southern part of the Ukrainian Shield (the Eastern Azov Sea region). Outstanding questions of stratigraphic division of different facial deposits of the section based on palynological data are outlined. The necessity of further palynological studies of deposits of the section near Kryzhanivka village is substantiated.
Eco-service potential of sustainable development of small towns
Authors: Yukhnovskyi Vasyl Yu. , Zibtseva Olga V.
Published: December 2019

The purpose of the study is to determine the ecosystem services potential and capacity for ecological stability of the five nearest small towns to Kyiv by comparative analysis of their territories by the number of ecosystem services provided per unit  area  and per capita. The researched towns have a similar history of development, but differ in area, number and density of population, industrial development and land use structure. The research is conducted on the basis of public indicators of the master plans of the small towns using the transfer method and relative values. The cost of ecosystem services in the territories of the small towns is calculated according to the categories of the land fund by agricultural land, forest and water. Ecosystem services per 1 ha of each land use category are adjusted for transfer coefficient into USD, taking into account the purchasing power parity factor for Ukraine. The cost of ecosystem services per capita and 1 ha of territory of each town is calculated for the current state of towns and for a 20-year perspective. It was established that the total cost of ecosystem services in Boyarka, Vyshgorod, Bucha and Irpin towns exceeded that of the ecosystem services of Vyshneve by 3.6, 5.8, 10.6 and 25.7 times respectively The cost of ecosystem services per capita in Irpin exceeds by 28.8 times the same indicator of Vyshneve, due to the small number of water bodies, forests and agricultural lands in the territory of the latter town, as well as due to its extremely high level of develop- ment. An analysis of the dynamics of the cost of ecosystem services per unit area of the small towns shows that the maximum cost   of ecosystem services per 1 hectare of urban territory is borne by Vyshgorod and Irpin, and in the long run – the maximum will be increased by 2.9 and 3.0 times in Vyshgorod and Boyarka respectively. These dynamics are due to the expansion of the urban area. The results of the study indicate the need to adjust the master plans of urban development in terms of expanding the environmental component of Irpin and Bucha.
On the classic geometrodynamics of a spherically-symmetric configuration of gravitational and electromagnetic fields
Authors: Gladush V. D.
Published: December 2019

Analytical aspects of the classical geometrodynamics for the spherically-symmetric configuration of the electromagnetic and gravitational fields in GR are considered. The feature of such configurations is that they admit two motion integrals – the total mass and charge. The Einstein-Hilbert action for the configuration, after dimensional reduction, by means of the Legendre transformation is reduced to the Hamiltonian action. Using the conservation laws for the mass and charge, as well as the Hamiltonian constraint, the momenta are found as functions of configuration variables. The set of equations, which associate momenta and functional derivatives of the action in the configuration space (CS) is integrable. This allows us to obtain the action functional as a solution of the Einstein-Hamilton-Jacobi equation in functional derivatives. Variations of the action functional with respect to mass M and charge Q of the configuration lead to the motion trajectories in the CS. We note that the minisuperspace metric, which is induced by the kinetic part of the Lagrangian, does not coincide with the CS metric that arises when the function of lapse N is excluded from the action. The space-time metric for which the indicated metrics coincide in the T-region up to a coefficient are considered. The metric of CS is constructed and its geometry is studied. Under the trivial embedding of hypersurfaces of the foliation into a dynamical T-region, the CS is flat. It allows introducing pseudo-Cartesian coordinates in which the CS metric takes the Lorentz form.
Structure and corrosion in NaCl solution of quasicrystalline Al–Cu–Fe cast alloys and thin films
Authors: Ryabtsev S. I. , Sukhova O. V. , Polonskyy V. A.
Published: December 2019

For the first time, quasicrystalline Al60Cu28Fe12 films with 260 nm thickness cooled at 1012–1014 K/s were produced by the modernized method of three-electrode ion-plasma sputtering. Films were deposited on NaCl substrate. The structure of as-sputtered films was investigated in comparison with that of as-cast specimens by methods of quantitative metallography, X-ray analysis, and scanning electron microscopy. Corrosion behavior in 5% NaCl aqueous solution was studied by potentiodynamic method and model tests. In the structure of the as-cast Al–Cu–Fe alloy, the quasicrystalline icosahedral i-phase was established to co-exist with λ -Al13Fe4 , τ-AlCu(Fe), η-AlCu, and θ-Al2Cu crystalline phases and occupy ~56 % of the alloy volume. The Al–Cu–Fe film contains dispersive quasicrystalline i-phase (~3 nm in size) that is stable up to 723 К. Corrosion of the as-sputtered Al–Cu–Fe film runs at the lower rate as compared with that of the as-cast alloy of the same composition. Model corrosion tests for 1, 2, 3, 4, 8 days with 5% NaCl solution at 293 K indicate that the investigated Al–Cu–Fe film remains virtually untouched by corrosion. No marks of pittings typical for as-cast Al–Cu–Fe alloys are observed on the film surface affected by saline solution.
Effect of impurities and disordering on the photoluminescence of crystals and glasses in the system Li2O - 7GeO2
Authors: Ohiienko O. V. , Moiseienko V. N. , Volnyanskij M. D.
Published: December 2019

The work is devoted to the study of photoluminescence spectra of weakly polar ferroelectric crystals Li2Ge7O15 and Li2O – 7GeO2 glasses. For all initial samples was observed the wide intensive luminescence band with maximum in the region of 525–550 nm. The spectral distribution of intensity and the position of the maximum of the band for a Li2Ge7O15 crystal depended on the excitation wavelength (λex=405 nm or 365nm were used). The spectral profile of the luminescence band was broadened in glass containing of 0.67% copper. The intensity of the luminescence band was decreased 6 times for glass doped with Cr3+ ions (0.01%) as compared with glass containing Cu2+ ions. The intense luminescence band of Cr3+ ions with λmax=659nm was appeared starting from 600. The assumption about the nature of the broad luminescence band observed in both nominally pure and doped glasses and crystals was made: the source of luminescence can be germanium - oxygen complexes [GeO4] and [GeO6] of the tetrahedral and octahedral configuration in the material structure.
From Home-Studios to Mobile Phones
Authors: Wilson Oli
Published: December 2019

This article explores changes in home-based recording contexts in Papua New Guinea to highlight the ways that digital recording and communication technologies become embedded in localized social practices. It seeks to contribute to the emerging discourse in ethnomusicology about new technologies, local agency and cultural diversity. The research is informed by ethnography undertaken with urban music producers, and explores the impact of mobile phonebased music sharing, as well as the dissemination of music through social media. The article problematizes notions of homogenization in the context of indigenous music recording practices, and contributes to an emerging discourse on musical cultures in the Pacific that positions local popular music as a constituent part of local social relations. I conclude by considering how technological disruptions represent new possibilities for understanding the ways that cultures embed technologies in the context of music recording and production.
Evaluation of Genetic Stability and Effects of Plant Growth Regulators for in vitro Propagation of Underutilized Vitis amurensis ‘Cheongsan’
Authors: KWON Joon-Ho , PARK Young-Sik , KIM Si-Hong , HEO Jae-Yun
Published: December 2019

Vitis amurensis ‘Cheongsan’ is a plant with high economic value in both medical and agricultural applications. However, its utilization has been restricted owing to difficulties encountered when applying traditional mass propagation methods, requiring instead application of in vitro propagation methods for their mass scale production. Hence, this study was conducted to find the optimal plant growth regulators for shoot multiplication and root induction during in vitro propagation. Among the three cytokinins used at multiple concentrations for culture initiation and shoot multiplication, the most positive response was found with MS medium containing 5.0 μM 6-benzyladenine (BA), compared to more modest responses from other types of cytokinin, such as kinetin (KIN) and thidiazuron (TDZ). For root induction, medium supplemented with α-naphthaleneacetic acid (NAA) produced a callus and inhibited shoot growth in explants, whereas indole-3-butyric acid (IBA) and indole-3-acetic acid (IAA) did not create any significant problems, but did display differences in root induction efficiencies. Generally, root induction responses with IBA were better that those with IAA. The maximum rooting rates were observed without callus formation and no shoot growth inhibition from explants grown on media supplemented with 0.67 μM IBA. Further, inter-simple sequence repeat (ISSR) analyses revealed that micropropagated plantlets generated in medium supplemented with 5.0 μM BA and 0.67 μM IBA did not lead to genetic variation. Therefore, the application of the in vitro propagation method developed in this study could be used on a commercial scale and will offer opportunities to strengthen the industrial use of V. amurensis ‘Cheongsan’.