bluuebunny/crossref_metadata_2025 huggingface dataset:
Epileptic seizures in patients with COVID-19: A systematic review of early evidences
Authors: Roy B , Banerjee I
Published: July 2021

Background: Global emergence of SARS-CoV-2 surfaced neurological complications amongst the patients. COVID-19 resembles with other coronavirus strains follows a trend of neurological complication, damage and encephalopathy, which entails considerable risks, requires attention for the neurologists. This is, to our knowledge, the first systematic review of the literature to investigate solely to elucidate the seizure spectrum by unfolding epileptogenicity of the SARS CoV-2 and potential pathways of neuroinvasion.

Methods: A systematic literature search was performed in PubMed and Embase database following standard guidelines, using specific keywords based on epileptic seizure onset described from December 01, 2019, to July 17, 2020

Results: A total of 17 studies were included ranging from case reports, series of cases, multicentre cross-sectional study with the first-time onset of seizure associated with an epileptic origin. We excavated causes of complex COVID-19 related neurological manifestations, e.g., cerebrovascular diseases, encephalitis, demyelinating lesions, cytokine storm and proposed routes of SARS-CoV-2 entry into the nervous system to understand the mechanism of an epileptic seizure.

Conclusion: COVID-19 is a potent neuropathogen which causes the new onset of epileptic seizures should get diagnostic recognition to evade possible deterioration of neurological conditions. However, more shreds of evidence from the future will further elucidate the epileptogenic potential of the pandemic.
INTRA-ANNUAL DYNAMICS OF MORTALITY RATES IN CITIES OF THE SOUTHERN PART OF THE RUSSIAN FAR EAST
Authors: Grigorieva E.A. , Glagolev V.A.
Published: July 2021

The analysis of the intra-annual dynamics of mortality rates features from all causes and from cardiorespiratory diseases, using the seasonality index, showed the maximum mortality rate in cities of the Far East south in winter, and the minimum-in summer. A detailed analysis of mortality caused by cardiorespiratory diseases in the older age cohort has revealed a higher risk of pathologies in winter periods, with a maximum in February. A relative indicator decline in November, apparently associated with the so-called «harvest effect», when excess mortality in one period (in October) is compensated by the indicator decrease in the subsequent time period. For the elderly population in Khabarovsk, the maximum death rate in January and its sharp rise in October repeats the picture of all-cause mortality with little gender difference. For men – residents of Vladivostok-the maximum development of cardiovascular disasters occurs in January, a slight increase in mortality is observed in May and October, and the minimum-in August and September, with an annual dynamics with an amplitude of 20%.
NYMPHOMYIIDAE (DIPTERA) OF THE AMUR RIVER BASIN
Authors: Makarchenko E.A. , Yavorskaya N.M.
Published: July 2021

The authors present the data on distribution, biology and ecology of the archaic Diptera Nymphomyiidae in the Amur River basin.
SELF-IDENTIFICATION OF THE RURAL POPULATION OF THE BORDER REGION (ON THE EXAMPLE OF THE JEWISH AUTONOMOUS REGION)
Authors: Kalinina I.V. , Solovchenkov S.A.
Published: July 2021

The article presents the results of a sociological study that examined the issues of self-identification of rural residents of the Jewish Autonomous region. It was revealed that a significant part of the respondents (49%) do no. identify themselves with the residents of the region, but consider themselves primarily residents of Russia. On the one hand, this indicates a high level of patriotism for the Motherland, but it may indicate migration sentiments, since a Russian can live in any region of his country. For 30% of the surveyed population, the border situation does no. cause concern or a positive attitude.
EDGE COLORING OF CACTUS GRAPHS WITH GIVEN SPECTRUMS
Authors: Albert Khachik Sahakyan
Published: July 2021

An edge-coloring of a graph G is a coloring of the graph edges with integers such that the colors of the edges incident to any vertex of G are distinct. For an edge coloring α and a vertex v the set of all the colors of the incident edges of v is called the spectrum of that vertex in α and is denoted by
BIOREMEDIATION OF SOILS CONTAMINATED WITH HEAVY METALS
Authors: R. Z. Uridia  , N. A. Kavtaradze  , K. N. Kochiashvili  , M. A. Stephanishvili  , I. I. Mikadze  , L. A. Dolidze  , T. A. Dgebuadze
Published: July 2021

Waste generated due to the growth of the modern industry is undergoing natural disposal in the environment for a long period of time. A special danger is caused by heavy metals that do not undergo biodegradation. Known purification methods of soils are not always effective and profitable. Correct selection of soil remediation methods contaminated with heavy metals ensures effective cleaning and restoration of soils. For this purpose, selecting representatives of various taxonomic groups of microorganisms binding heavy metals in the soil is carrying out. A complex method of purification of soils contaminated with have metals is being developed. Modified forms of humic acids were developed, geochemical barriers using local clays were created. Works to biostimulate local microorganisms required for bioremediation of soils contaminated with heavy metals are conducted. Remediation and increasing the fertility of soils contaminated with heavy metals are necessary for the prevention of further penetration of these metals into agricultural crops.
USING OF GEOINFORMATION TECHNOLOGIES IN ASSESSMENT OF QUALITY CONDITION OF ROADS
Authors: Olena Slavinska  , Mykhailo Dulia
Published: July 2021

The article presents a method for assessing the quality of roads using geographic information technologies to create digital models of the road and the surrounding area. The construction of such digital models is performed on the basis of geospatial coordinates to be processed during the certification of roads. When processing data in specialized software packages, geometric parameters and indicators of compliance with traffic safety conditions are obtained on the basis of spatial coordinates. Based on the constructed digital models, the indicators of functional wear are estimated.
Trends, features and economic efficiency of breed placement of cattle in the regions of Russia
Authors:   Federal Research Center for Animal Husbandry named after Academy Member L.K. Ernst, Dubrovitsy, Moscow Region, Russia, Bautina O.V.
Published: July 2021

The article considers the current state of the dairy industry in the regions of Russia. A comprehensive assessment of the efficiency of the placement of main livestock breeds on a number of economic characteristics in the regional aspect was carried out. The most and least favorable breeding zones for each of the species under consideration were identified for different use indicators.
On the development of deep grain processing in Russia and abroad: an innovative aspect
Authors:   Federal Scientific Center of Agrarian Economy and Social Development of Rural Areas - VNIIESkH, Moscow, Russia, Sandu I.S. , Bykov V.G. ,   Federal Scientific Center of Agrarian Economy and Social Development of Rural Areas - VNIIESkH, Moscow, Russia
Published: July 2021

The article analyzes the current state and prospects for the development of deep processing of corn and wheat in Russia and abroad – in the United States, the European Union, Brazil and China. It is emphasized that despite the presence of some constraining factors in recent years, the development of this direction in the grain complex has intensified in Russia. This is due to the commissioning of a number of large specialized factories for the production of new products with high added value: starch, gluten, glucose-fructose syrups, amino acids, and others, which reduces the cost of foreign currency funds for their import due to import substitution. The essence of the biotechnological process and its three main fractions in the production of deep grain processing products, as well as its economic component, are considered on the example of the design solution of a plant with a capacity of 500 t/day. Additional measures of the Government of the Russian Federation and the Ministry of Agriculture of the Russian Federation to enhance support for the development of deep grain processing in the country and to increase the export of new products are presented.
Development of methods for assessment and accounting of agricultural products
Authors:   Izhevsk State Agricultural Academy, Izhevsk, Russia, Alborov R.A. , Kontsevaya S.M. ,   Izhevsk State Agricultural Academy, Izhevsk, Russia, Horuzhy L.I. ,   Russian State Agrarian University – MSKhA named after K.A. Timiryazev, Moscow, Russia
Published: July 2021

The article deals with the issues of classification, assessment and accounting of agricultural products of crop and livestock production. The main features of production and the corresponding tasks of accounting for agricultural products are determined. Organizational and methodological recommendations for rationalizing the accounting of agricultural products during their initial recognition in accounting, after recognition and when writing off these products are proposed. The methods for determining the fair value of finished (marketable) agricultural products and biological production stocks (feed, seeds, by-products) are recommended for their reflection in accounting in accordance with paragraphs 19 and 34 of FSBU 5/2019 “Inventories”.
Assessment of the attractiveness of rural areas in terms of internal migration in Russia and the EU countries
Authors:   Russian State Agrarian University – MSKhA named after K.A. Timiryazev, Moscow, Russia, Vorontsova N.V. , Merzlov A.V. ,   Russian State Agrarian University – MSKhA named after K.A. Timiryazev, Moscow, Russia, Mukhametzyanov R.R. ,   Russian State Agrarian University – MSKhA named after K.A. Timiryazev, Moscow, Russia, Platonovskiy N.G. ,   Russian State Agrarian University – MSKhA named after K.A. Timiryazev, Moscow, Russia
Published: July 2021

Those born in rural areas move to urban areas for both temporary and permanent residence. In general, urbanization is expanding in the world, as evidenced by the increase in the proportion of the urban population. However, recently, in parallel with urbanization, especially in the developed countries of Europe, there has been a reverse flow - the resettlement of a certain part of the urban population to the countryside. It attracts city dwellers with a comparatively better ecological situation, the presence of wide spaces and a sense of freedom. All of this is also supported by modern innovative capabilities. Information and digital technologies are increasingly blurring the boundaries between urban and rural areas. However, the attractiveness of rural areas for permanent habitation in a number of cases, including in our country, is reduced due to the lack of adequate urban living conditions for life and urban-centric state policy. This primarily affects rural areas remote from cities. At the same time, the suburbs, especially megacities, are the most attractive in terms of internal migration. It accommodates the conditions of urban life and the advantage of rural areas. The article touches upon the issues of internal migration of the urban population to the countryside in Russia and a number of European countries (on the example of France and Germany). In this regard, it was noted that this tendency exists, and with an increase in dynamics. As a result of the study, the factors that influence the decision-making by the townspeople to move to settlements located in agricultural areas were identified, and a set of criteria was proposed to assess their attractiveness from the point of view of internal migration of the population.
Climate and weather changes, agricultural prices and exports in the first quarter of 2021 in Russia
Authors:   A.A. Nikonov VIAPI, branch of Federal Scientific Center of Agrarian Economy and Social Development of Rural Areas - VNIIESkH, Moscow, Russia, Sobolev O.S.
Published: July 2021

The article presents the climatic and weather features of the sowing campaign in the 1st quarter of 2021. Formulas for forecasting grain resource balances in the Russian Federation for any perspective are presented. Producer prices for grain, milk, and meat in Russia, the EU, and the United States in the 1st quarter of 2021 are compared. The influence of the grain export duty on prices in the Russian Federation and in the world is analyzed.
Лабораторное изучение механических свойств мёрзлых пород и льдов. Учебное пособие для студентов кафедры криолитологии и гляциологии Географического факультета МГУ имени М.В. Ломоносова: учебное пособие, [электронное издание сетевого распространения] / Авторский коллектив. – М.: “КДУ”, “Добросвет”, 2021. – 50 с.
Authors: Кошурников Андрей Викторович , Гагарин Владимир Евгеньевич , Ржаницын Герман Анатольевич , Фролов Денис Максимович
Published: July 2021

В пособии рассмотрена теория и методика лабораторных методов изучения механических свойств мерзлых пород и льдов с целью применения их в области геотехники и инженерных изысканиях в строительстве.
Influence of atmospheric macroprocesses on the spatial distribution of spring precipitation within the territory of Ukraine
Authors: Goncharova L. D. , Prokofiev O. M. , Reshetchenko S. I. , Chernichenko A. V.
Published: July 2021

The article presents the results of a comprehensive statistical study of the spatial distribution of spring precipitation in Ukraine and its relationship with the main low-frequency oscillations of the Northern Hemisphere. The research focuses on the monthly amount of rainfalls in March, April and May at 40 long-range stations of Ukraine that are evenly distributed throughout its territory, and the indices of North Atlantic (NAO) and North Sea-Caspian (NCP) fluctuations over a 45-year period (1962-2006). The use of multiyear data allowed for objective clusterization and division of the Ukrainian territory into regions with different types of weather observed in the event of precipitation, with each of them being physically substantiated. To ensure clarity, the article presents regional statistical models in the form of schematic maps of probable relationships between distribution of spring precipitation in Ukraine and the North Atlantic and Euro-Mediterranean macroprocesses. In order to forecast the monthly rainfall in March, it is advisable to take into account the state of the North Atlantic fluctuations. The response of this fluctuation was found within Chernivtsi, Vinnytsia, Cherkasy, Kyiv Regions, northern part of Odesa Region, western districts of Chernihiv Region and southern part of Zhytomyr Region. In the western regions of Ukraine, as well as in Vinnytsia, Kyiv, Zhytomyr and Chernihiv Regions, the formation of precipitation in April depends on the state of both NAO and NCP; in the rest of Ukraine – only of NCP. The 90% probability linear statistical relationship between precipitation in May and the main climatic signals of the Northern Hemisphere under study was not found only in some northern regions of Ukraine, namely: Kyiv, Chernihiv, Sumy Regions and central (Poltava and northern part of Cherkasy Region) part of Ukraine. A study of the influence of North Atlantic and Euro-Mediterranean macroprocesses on the distribution of monthly rainfall in Ukraine, conducted using a statistical approach, shows its ambiguity during different spring months and within different regions of Ukraine, and requires further research to solve the general scientific problem – study of climate-conditioned natural resources required to ensure sustainable socio-economic development of Ukraine under conditions of global climate change.
Time distribution of thunderstorms observed at Odesa AMSC at the beginning of the 21st century
Authors: Nedostrelova L. V. , Chumachenko V. V.
Published: July 2021

The article presents the results of the research of thunderstorm activity at Odesa AMSC for the period of 2000-2019. Under conditions of intense warming, thunderstorm activity responds to the changes of temperature, humidity, radiation regime and atmospheric composition. Modern climate changes that are characterized by rising air temperatures have a decisive influence on the conditions under which dangerous weather phenomena are formed, thus monitoring of the thunderstorms formation in Ukraine is of great importance.

The research includes the analysis of synoptic conditions of thunderstorm activity formation such as air-mass processes, frontal activity, and studies daily and daytime variability of the number of thunderstorm cases for the given period. The results of everyday meteorological observations of atmospheric phenomena conducted by Odesa AMSC within the period of 2000-2019 were used as input data to determine the characteristics of thunderstorm activity over city of Odesa. In order to identify the presence, time and duration of thunderstorm activity aviation weather diaries AV-6 were also reviewed. Certain synoptic materials were used to analyze the types of phenomena. Such materials include interactive database ARMsyn, surface synoptic charts for the periods of observation before and during the thunderstorms.

It was established that during the period under study air-mass thunderstorms were formed in 370 cases of thunderstorm activity observed at the given observation post. Frontal thunderstorms occur less often: 241 cases over 20 years. The largest number of such thunderstorms is cold front thunderstorms amounting to 129 cases. 75 of them were identified as occlusion front thunderstorms. The least frequent were warm front thunderstorms – only 37 cases constituting 15% of the total number of frontal formations.

During the studied period a total number of 620 thunderstorm cases was recorded, 195 of which are dry thunderstorms. Considerable attention is paid to the daily and daytime variability of thunderstorm cases number recorded by Odesa AMSC. With relation to the daily variation, more thunderstorms are observed during daytime amounting to 393 cases, 130 of which are dry thunderstorms. Night thunderstorms amount to 227 cases, 65 of which are dry thunderstorms. With relation to daytime distribution, more thunderstorms were detected in the afternoon.
Cost effective meter of moisture integral parameters of the atmospheric column
Authors: Ruzhentsev N. V. , Zhyla S. S. , Pavlikov V. V. , Kosharsky V. V. , Cherepnin G. S.
Published: July 2021

Continuous remote monitoring of the atmospheric physical parameters is an urgent task for solving the issues related to meteorology, climatology, artificial influence on clouds, studying the physical parameters of cloud cover etc. In the developed countries such issues are solved using science-driven technologies of millimeter wave range radiometry. They allow, in particular, quick restoration of the values of total content and effective temperature of droplet and vaporous moisture in the atmospheric column, and distinguishing the areas with crystalline, droplet or vaporous water phases.

This work aims at substantiating, by calculation and experiment, the possibility of large-scale solving the problems of continuous remote monitoring of the studied atmospheric moisture parameters using the method of centimetre wavelength range radiometry. To determine the best pair of frequencies for restoring the atmospheric moisture parameters based on radiometric data of remote sensing the linear absorption coefficients were calculated for clear atmosphere, for cloudy atmosphere depending on the temperature of drops and for rainfalls of various intensities for 4, 12, 20, 40 and 94 GHz frequencies. In order to calculate these data, we used a well-known MPM model (Atmospheric Millimeter-Wave Propagation Model). At the same time, calculation of the altitude profiles of the atmospheric meteorological parameters was carried out based on the ERA-15 model.

Comparison of the data obtained by calculation, taking into account the progress of the technical parameters of the serial element base, indicated a possibility of solving the above problems in the centimetre wavelength as well. The research presents a description of the diagram and technical solutions, as well as the appearance of a two-frequency radiometric system with 1.5 cm and 2.5 cm ranges created at the National Aerospace University (KhAI) on the basis of an easily accessible modern element base and full-scale tests' results. The budget-friendly focus of the described product allows for radiophysical measurement with a sensitivity of radiometers exceeding 0.01 K while ensuring the cost of small-scale production of the radio technical part of the system, comparable to the cost of TV converters commonly used in everyday life.
Wind potential assessment over Morocco`s Marrakesh - Safi Region in 2021-2050 based on the RCM`s forecasts as part of the CORDEX-Africa project
Authors: Hadri Y. El. , Slizhe M. , Sernytska K.
Published: July 2021

The purpose of the study is to determine the features of the spatial distribution of the wind speed in Marrakesh - Safi region in 2021-2050, as well as the distribution of the specific power of the wind flow at various altitudes above the earth’s surface to determine the wind class of the area in the coming decades. Currently, the region has two large wind farms: Essaouira-Amogdoul and Tarfayer. To assess the future state of climate in Marrakesh − Safi region, the results of calculations of regional climate models (RCM) of the CORDEX-Africa project for the period 2021-2050 were used. The RCM modeling was carried out for the region of Africa, in a rectangular coordinate system with a spatial resolution of ~ 44 km. Model calculation was performed taking into account the greenhouse gas concentration trajectory of RCP 4.5. As a result of simulation for the period 2021-2050, mean monthly values of wind speed "sfcWind" (m·s-1) and the daily maximum near-surface wind speed "sfcwindmax" (m·s-1) at 10 m height were obtained. Then, based on the wind speed rows, the values of the wind power density at a height of 50 m and 100 m were calculated. The results of model calculations of wind speed showed that the ensemble mean of wind speed for the period 2021-2050 will be from 3.8 m∙s-1 in Kelaat Sraghna Province to 7.2 m∙s-1 on the stretch of the Atlantic coast between Cap Sim and Cap Tafelny.The distribution over the territory will be influenced by proximity to the ocean, models predict the highest wind speeds on the coast, and when moving deep into the region, the wind speed will decrease.The analysis of simulation results showed that in the coastal areas of the region favorable conditions in terms of wind energy development will remain, and the highest wind speeds of the model are predicted on the Atlantic coast between Cap Sim and Cap Tafelny. By the size of the specific power of the wind flow, significant wind resources will have the territory lying along the coast from Cap Sim to the southern border of the region, and in the area of the power plants Essaouira-Amogdoul and Tarfayer models predict the conditions corresponding to the outstanding wind power class.
Peculiarities of the environmental light pollution in Chernivtsi Region
Authors: Zhuk А. V. , Zarochentseva O. D.
Published: July 2021

Introduction. Every year industrial development and economic growth make light pollution worsen on a global scale. It is a well-known fact that artificial outdoor lighting causes destruction of wildlife habitat, impacts circadian rhythms of all living beings, disrupts animal behavior and leads to medical disorders of humans. Over the last decade scientists switched their focus from artificial sky glow over large cities to light pollution of rural landscapes, protected areas and roadways. 

The purpose of this paper consists in assessing night-time light emissions over Chernivtsi Region as well as over city of Chernivtsi using satellite measurements.

Methods. Measurements of night-time light emissions were obtained with the help of GIS web application Radiance Light Trends and the light trends analysis tool. The application allows examination of changes in light pollution across selected areas since 1992 and performs time-series analysis with fitting an exponential curve into the data set.

Results. The trend in light emissions observed by satellites for Chernivtsi Region indicated brightening at the rate of 2.45 % per year from 1992 to 2014, and 2.93 % per year from 2014 to 2021. The marked increase in the intensity of atmospheric light pollution over Chernivtsi Region is largely attributable to urban expansion of district centers, national & international routes and resort complexes. At the same time, the spatial pattern of the light environment over city of Chernivtsi indicated a nearly constant level of aggregate annual light radiance for the last 8 years. A large irregularly shaped "light spot" was detected on the territory of the Prut-Siret interfluve. It crosses the region from the northwest to the southeast and covers the regional center with its suburbs and the national highway H-10. The night light radiance constitutes 47.49∙10-9 mW/cm2 sr in the center of the spot and more than 1∙10-9 mW/cm2 sr at its edges. The highest level of light pollution in Chernivtsi Region was registered in January, and the lowest – in March. Night-time light emission over two most illuminated highways remains relatively constant regardless of the season.

Conclusion. The study highlights that despite low population and low economic activity, rural landscapes demonstrate a trend towards increasing brightness of the night sky. The findings provide a quantitative reference for light pollution management in the region and for further research in the area.
HUMAN URINARY BLADDER GLANDS AND THERE MACRO-MICROSCOPIC PECULIARITIES
Authors: Huseynova G. , Ojagverdizade E. , Nasirova Z.
Published: July 2021

Purpose of the investigation is to learn the morphological peculiarities (quantity parameters, age, individual and regional characteristics) of the glands of urinary bladder in the different age stages of the postnatal ontogenesis in the norm. A macro-microscopy method on total preparations of a wall of the bladder 54 received from corpses. Victims from the casual reasons at the age from the period newborn to senile age and we investigated variants of the form of a bladder glands, feature of its change in different sites of a wall of organ (proximal, average, distal thirds), taking into account age. Glands have preliminary been painted 0.05 % by a solution methylene dark blue with Sinelnicov’s method. The glands were investigated with the application of stereomicroscopic-binocular microscope MBS-9. Statistical data processing included calculation of arithmeticmean values, their errors, confidential intervals (excel). In quantity of the parameters of the urinary bladder, glands have individual changeability in the investigation. The boundary of variation of the parameters of the urinary bladder glands is rather wider in the maturity and senile stages. Connected with biological activity of the people in the definite degree, the quantity of the glands does not change in comparison with elderly period in old stage. In the stages of the first maturity and majority, the parameters of the measure and quantity of the urinary bladder glands in the women have difference from men. In this microscopic investigation, there is very important anatomical scientific information about the human urinary bladder glands that in the different stages, their quantity, age, form and regional changeability, proximal-distal gradient as well as other anatomical facts were established.
GENDER DIFFERENCES IN MYOCARDIAL REVASCULARIZATION IN INDIVIDUALS WITH ACUTE CORONARY SYNDROME AFTER CORONARY ARTERY BYPASS SURGERY
Authors: Ibrahimov F.
Published: July 2021

The purpose of this study was to study the gender differences in the frequency of major cardiovascular and cerebrovascular events (MACCE), cardiac mortality, mortality from all other causes, and to study the relationship between these conditions and risk factors in patients after CABS. Materials and methods. The study included 717 patients after the CABS, of whom 596 were male and 121 female. Patients admitted to hospital with acute coronary syndrome (ACS) and only those undergoing CABS surgery participated in the study. All clinical data on demographic characteristics, risk factors, and complications were selected and the survival and mortality analysis was performed retrospectively. The results. In assessing the age indicator, it was found that females (59.9±7.3 years) were significantly older than males (56.3±8.2 years) (p=0.00012). In the estimation of the 30-day mortality rate, it was shown that this indicator was 3.4% for women and 0.5% for men, the differences were statistically significant (p=0.004). Identical differences were also observed for 1-year mortality, as this indicator was 3.5% for women, while for men it was 0.7% and significantly lower (p=0.012). The 5-year MACCE percentage was 19% for women and 16.9% for men, i.e. the difference was not statistically significant (p=0.585). Conclusion. The main finding of this study was the difference between the profiles of female and male populations of preoperative patients after CABS. As in other studies in this area, and in this study, female patients were older, more likely to have AH, DM, obesity and anaemia than male patients.
PRACTICAL WORK ON VOICE TRAINING, PART V. WORK ON A WORK OF ART
Authors: Pokrovskiy A.
Published: July 2021

The article examines the General provisions of vocal pedagogy: the relevance of the issue, principles, goals, objectives and methods of teaching singing; the criteria, methods of selection and basic skills necessary for those wishing to learn vocal art.
Mjere rječničke raznolikosti u pričama djece predškolske i rane školske dobi
Authors: Hržica Gordana , Trtanj Ivana
Published: July 2021

Razvoj rječnika u usvajanju prvoga jezika može
se pratiti analizom transkripata govorenog jezika djece predškolske i rane
školske dobi, dobivenih, primjerice, pričanjem nepoznate priče prema slikovnom
predlošku. Pri analizi rječnika takvih jezičnih uzoraka upotrebljava se niz
mjera poznatih kao mjere rječničke raznolikosti. Za dvije mjere, broj različitih
riječi (BRR) ili omjer različnica i pojavnica (ORP), utvrđeno je da ovise o
duljini transkripta te zbog toga nisu prikladne za analizu. Preporučuje se da
se te mjere izračunavaju na ograničenom broju riječi ili da se upotrebljavaju
druge mjere, primjerice parametar/mjera D (D) ili pomični prosječni omjer
obličnica i pojavnica (MATTR). Dosadašnja istraživanja nisu u potpunosti
razriješila dvojbu oko prikladnih mjera za mjerenje rječničke raznolikosti.
Validacijska istraživanja u najvećem broju slučajeva temelje se na analizi
pisanoga jezika te na analizi engleskoga jezika. Zbog toga je cilj ovog rada
bio istražiti koje mjere rječnike raznolikosti mogu razlikovati govorenu
jezičnu proizvodnju djece različite dobi u hrvatskom jeziku. S pomoću
slikovnice bez riječi Frog, where are you? ispitano je ukupno 157 djece
u četiri dobne skupine. Podatci pokazuju da rječnička raznolikost mjerena svim
četirima mjerama raste s porastom kronološke dobi. Tri mjere (BRR, ORP, D)
statistički značajno razlikuju dvije najmlađe skupine (četverogodišnjaci i
šestogodišnjaci) od najstarije (desetogodišnjaci). No, samo mjera MATTR
razlikuje dvije najmlađe skupine od dviju najstarijih skupina (osmogodišnjaci i
desetogodišnjaci).
Phân tích đặc trưng dao động của dầm FGM theo lý thuyết dầm Euler-Bernoulli bằng tiếp cận giải tích
Authors: Long Nguyễn Văn , Tú Trần Minh , Quốc Trần Hữu
Published: July 2021

Bài báo phân tích dao động riêng và đáp ứng động của dầm bằng vật liệu có cơ tính biến thiên (FGM) dưới tác dụng của tải trọng phân bố vuông góc với bề mặt dầm. Với cách chọn hệ tọa độ quy chiếu được đi qua mặt trung hòa, các hệ thức quan hệ và phương trình chuyển động của dầm FGM được thiết lập trên cơ sở lý thuyết dầm Euler-Bernoulli. Lời giải giải tích dạng hiển được xây dựng cho trường hợp dầm FGM có liên kết hai đầu khớp. Ví dụ kiểm chứng đã được thực hiện qua so sánh với công bố của các tác giả khác trong đó sử dụng hệ quy chiếu gắn với mặt trung bình. Ảnh hưởng của các tham số về vật liệu, kích thước hình học, tải trọng cưỡng bức lên đặc trưng dao động của dầm được khảo sát cụ thể qua các ví dụ số.
Nghiên cứu thực nghiệm sự làm việc chịu uốn của dầm bê tông cốt hỗn hợp thép và polyme cốt sợi thủy tinh (GFRP) bị ăn mòn bởi ion clorua
Authors: Ninh Nguyễn Tuấn , Linh Trịnh Hoài , Hải Đỗ Văn , Tài Khúc Văn , Hiếu Nguyễn Trung
Published: July 2021

Thanh polymer cốt sợi thủy tinh (GFRP) với những ưu điểm như cường độ cao, không bị ăn mòn, không từ tính có thể được sử dụng như cốt chịu lực trong các kết cấu công trình bằng bê tông làm việc trong môi trường xâm thực. Bài báo này trình bày nghiên cứu thực nghiệm ứng xử uốn của dầm bê tông cốt hỗn hợp thép-thanh GFRP (hay cốt SGFRP) bị ăn mòn bởi ion clorua. 02 mẫu dầm bê tông cốt SGFRP được chế tạo. Bên cạnh đó, để có sự đánh giá tương quan ảnh hưởng của thanh GFRP đến ứng xử của dầm, 02 mẫu dầm bê tông cốt thép thường có cùng cấu tạo cốt thép như dầm bê tông cốt hỗn hợp cũng được chế tạo. Thí nghiệm ăn mòn đẩy nhanh bằng phương pháp ăn mòn điện hóa được tiến hành trên 04 mẫu dầm, cho đến khi xuất hiện các vết nứt trên bề mặt dầm, do cốt thép bị ăn mòn gây ra. Tiếp đến, các mẫu dầm bị ăn mòn được thí nghiệm uốn bốn điểm cho đến khi phá hoại. Kết quả thực nghiệm thu được cho phép làm rõ ứng xử uốn của dầm bê tông cốt SGFRP khi cốt thép bị ăn mòn cũng như vai trò của thanh GFRP trong việc phân tán các vết nứt do uốn và gia tăng khả năng chịu lực của dầm.
Nghiên cứu quy trình thi công bù co cột nhà siêu cao tầng theo phương pháp bù co di chuyển tối ưu trong điều kiện Việt Nam
Authors: Xuân Nguyễn Đức , Khoa Hồ Ngọc , Hùng Nguyễn Sỹ , Tùng Nguyễn Thị Thanh
Published: July 2021

Trong bài báo này tác giả trình bày quy trình bù co cột nhà siêu cao tầng bằng phương pháp bù co di chuyển tối ưu MCO (Moving Compensation Optimization). Phương pháp MCO đã được nghiên cứu, tính toán bằng máy tính và tỏ rõ sự ưu việt khi có lượng nhóm bù co tối thiểu, giá trị bù của mỗi nhóm tối ưu và các giá trị vênh co sau bù được kiểm soát tốt trong giới hạn cho phép của yêu cầu kỹ thuật so với các phương pháp bù co gộp nhóm đều, bù co gộp nhóm di chuyển và bù co gộp nhóm tối ưu. Quy trình bù co theo MCO được áp dụng cho tòa nhà Lotte Center Hanoi cao 70 tầng và chứng tỏ được sự linh hoạt hiệu quả khi điều chỉnh phương án bù trong giai đoạn thi công thực tế, xử lý được các tình huống phát sinh cụ thể do biến động co ngắn cột xảy ra trong tiến trình xây dựng.
Ước lượng khả năng chịu nén đúng tâm của cột ống thép nhồi bê tông bằng thuật toán máy học
Authors: Hoàn Phạm Thái
Published: July 2021

Cấu kiện cột ống thép nhồi bê tông (Concrete-Filled Steel Tube-CFST) với nhiều ưu điểm được quan tâm nghiên cứu và ứng dụng rộng rãi trong các công trình xây dựng khoảng 3 thập kỷ qua. Bên cạnh đó, sự phát triển mạnh mẽ cùa kỹ thuật máy tính đã mở ra nhiều cơ hội ứng dụng các kỹ thuật trí tuệ nhân tạo (AI) vào trong thiết kế công trình. Bài báo giới thiệu và ứng dụng XGBoost, một trong những kỹ thuật trí tuệ nhân tạo mới nhất và mạnh mẽ nhất để ước lượng khả năng chịu nén dọc trục của cột ống thép nhồi bê tông (CFST) tiết diện tròn. Kết quả từ 1017 thí nghiệm về loại cấu kiện này được sử dụng làm dữ liệu để huấn luyện mô hình. Các thông số bao gồm đường kính ngoài của tiết diện (D), chiều dày của ống thép (t), cường độ chảy của thép (fy), cường độ chịu nén của bê tông (f'c) và chiều dài cột (L) được sử dụng như những thông số đầu vào, trong khi đó khả năng chịu lực nén đúng tâm dọc trục (N) là thông số đầu ra. Kết quả huấn luyện từ mô hình cho thấy thuật toán XGBoost có thể ứng dụng hiệu quả trong việc ước lượng khả năng chịu nén dọc trục của cột CFST tiết diện tròn với độ chính xác cao với thời gian ngắn.
Nghiên cứu thực nghiệm khả năng chống xâm thực axit của bê tông sử dụng xỉ lò cao và tro bay
Authors: Chính Nguyễn Văn , Trung Phạm Công Tuấn
Published: July 2021

Bài báo trình bày kết quả nghiên cứu thực nghiệm ảnh hưởng của xỉ lò cao S95 và tro bay loại F từ nhà máy nhiệt điện Vũng Áng đến khả năng chống xâm thực axit của bê tông. Tỉ lệ các thành phần cấp phối là chất kết dính : cát : đá : nước = 1 : 2 : 3 : 0,6. Xi măng portland được thay thế bởi xỉ lò cao S95 và tro bay loại F với tổng tỉ lệ thay thế theo khối lượng là 20%, trong khi chất kết dính được định nghĩa bằng tổng của xi măng, xỉ lò cao và tro bay. Thí nghiệm về khả năng chống xâm thực axit sunfuric được thực hiện trên mẫu lập phương kích thước 100 × 100 × 100 mm sau khi ngâm 28, 56 và 90 ngày. Kết quả thí nghiệm cho thấy rằng nằm trong giới hạn nghiên cứu, xỉ lò cao và tro bay đều góp phần nâng cao độ linh động của vữa bê tông. Xỉ lò cao và tro bay đều nâng cao khả năng chống xâm thực axit của bê tông thông qua việc giảm sự hư hại bề mặt, giảm sự hao hụt khối lượng và sự suy giảm cường độ chịu nén. Ngoài ra, khả năng chống xâm thực axit sunfuric của tro bay lớn hơn so với xỉ lò cao.
Đánh giá hoạt động xây dựng đô thị tăng trưởng xanh tại thành phố Yên Bái giai đoạn 2015 – 2019
Authors: Mai Nguyễn Thị Thanh , Diệp Lại Thị Ngọc , Quý Trần Việt , Tiến Nguyễn Trọng
Published: July 2021

Giống như nhiều thành phố khác ở Việt Nam, thành phố Yên Bái có những bước phát triển nhanh chóng trong những năm qua, làm thay đổi diện mạo và nâng cao chất lượng đời sống người dân đô thị. Tuy nhiên, tốc độ đô thị hoá nhanh chóng cùng với tăng trưởng kinh tế đang gây ra tác động tiêu cực tới môi trường và xã hội, đòi hỏi chính quyền địa phương quan tâm nhiều hơn tới tăng trưởng kinh tế xanh, phát triển bền vững đô thị. Đánh giá hiện trạng xây dựng đô thị TTX có vai trò quan trọng, giúp chính quyền địa phương phát hiện những hạn chế, thách thức, cũng như chỉ ra những thay đổi tích cực trên các khía cạnh của phát triển đô thị, từ đó đề xuất kế hoạch hành động tăng trưởng xanh phù hợp ở giai đoạn tiếp theo. Dựa trên các chỉ tiêu xây dựng tăng trưởng xanh quy định trong thông tư số 01/2008/TT-BXD, bài báo tiến hành thu thập số liệu, phân tích, đánh giá hiện trạng xây dựng đô thị TTX của thành phố Yên Bái giai đoạn 2015 – 2019. Những kết quả này sẽ được kế thừa và phát triển trong nghiên cứu tiếp theo liên quan tới đề xuất kế hoạch xây dựng đô thị Tăng trưởng xanh của thành phố Yên Bái.
Tính nhiệt của đầu đốt thiết bị gia nhiệt hồng ngoại sử dụng trong sửa chữa đường bê tông asphalt
Authors: Chương Lê Hồng , Năng Tống Đức , Nhất Đỗ Văn , Long Ngô Thanh , Dũng Nguyễn Quốc
Published: July 2021

Thiết bị gia nhiệt sửa chữa mặt đường bê tông asphalt theo phương pháp sửa chữa tái chế nóng tại chỗ (HIR) đang được áp dụng rộng rãi trên thế giới do có những ưu điểm như chất lượng miếng vá tốt, thời gian thi công nhanh, tiết kiệm vật liệu và bảo vệ môi trường. Tuy nhiên, ở Việt Nam chưa có thiết bị loại này để thực hiện phương pháp HIR. Bài báo giới thiệu phương pháp tính toán quá trình gia nhiệt bằng hồng ngoại dùng cho thiết bị gia nhiệt mặt đường, làm cơ sở cho thiết kế và chế tạo thiết bị này ở Việt Nam. Các kết quả thử nghiệm trên thực tế của thiết bị chế tạo có sự tương đồng với tính toán lý thuyết nên kết quả của nghiên cứu là đáng tin cậy và có tính khả thi cao.
Exploring of e-WOM, Destination Image and Perceived Value toward Return to Visit
Authors:   Universitas Negeri Medan, Prayogo Rangga Restu
Published: July 2021

Factors of tourism into one of the largest and fastest way to grow an economy is suitable for a country that would like to expand it to include Indonesia. The development of tourism through promotion and maximum service is already undertaken by the authorities to attract domestic and foreign tourists in Indonesia. One of the attractions which are experiencing an increase in visiting Goa Pindul. The problems in Goa Pindul are increase tourists revisit intention, but the facilities and infrastructure are less well. The purpose of this research was to study the relationship between e-WOM, destination image, perceived value, and return to visit in the tourism industry. Sample techniques used in this research is purposive sampling using accidental sampling. Respondents who used as many as 200 respondents on travelers who already visited one time, aged 17 years, and using the internet to searching for information about Goa Pindul. Data analysis techniques used are PLS-SEM and Sobel test. The empirical results from PLS-SEM showed that e-WOM positive and significant impact on destination image, perceived value, and return to visit. The destination image has a positive and significant impact on perceived value but on return to visit insignificant. Perceived value positive and significant impact on back to visit. Sobel test findings that effect of e-WOM on arrival to visit through perceived value significantly.
Theory Consumption of Value: Destination Images in Local Culinary
Authors:   Universitas Muhammadiyah Surakarta, Praswati Aflit Nuryulia , Mukharomah Wafiatun ,   Universitas Muhammadiyah Surakarta, Ramadhani Amelia Jihan ,   Universitas Muhammadiyah Surakarta, Murwanti Sri ,   Universitas Muhammadiyah Surakarta
Published: July 2021

Purpose: This study aims to analyze the effect of taste value, epistemic value, emotional value on the culinary destination image with tourist attitude as an intervening variable. Research methods: This research uses quantitative methods. Primary data is obtained directly from tourists who have visited and enjoyed local cuisine. The sample was determined using nonprobability sampling with a purposive sampling technique and obtained a sample of 335 respondents. The data collection method in this study used a questionnaire that was distributed online through Google forms. This research was analyzed using SPSS software. Results and discussions: The results of this study indicate that all variables have a significant effect on tourist attitudes. Variable attitude of tourists significantly influence the image of culinary destinations. Taste value, epistemic value, emotional value variables significantly influence the image of local culinary destinations mediated by tourist attitudes. Conclusion: Taste value, epistemic value, and emotional value significantly influence the image of culinary destinations mediated by tourist attitudes.
The Influence of Service Quality, Destination Image, and Memorable Experience on Revisit Intention with Intervening Variables of Tourist Satisfaction
Authors:   Politeknik Negeri Medan, Sitepu Edy Sahputra , Rismawati Rismawati ,   Business Administration Department, Politeknik Negeri Medan, Indonesia
Published: July 2021

Purpose: This study aims to build a model for tourists' revisit intention who come to visit tourist destinations. Research methods: This study uses primary data with 400 samples assigned by random sampling. The data were processed using the Structural Equation Model (SEM). Results and discussions: In total (total effect) of each variable, which has the most considerable full effect, is given the destination image followed by service quality, tourist satisfaction, and memorable experience, respectively. For the mediation role, it is found that the tourist satisfaction variable is a mediator of the relationship between an unforgettable experience and revisit intention. Tourist satisfaction is not a mediator of the relationship between service quality and revisit intention and tourist satisfaction, nor is it a mediator of the relationship between destination image and revisit intention. Regarding revisit intention, the analysis results show that this variable is significantly influenced by the variables of service quality, destination image, and tourist satisfaction. Meanwhile, the effect of memorable experience is not statistically significant. Conclusion: The results of this study prove that efforts to increase tourists' revisit intention can be made by improving destination management that considers service quality, destination image, memorable experience, and tourist satisfaction.
Development of Strategy for Culture-Based Tourism Village in Tempilang Village, Bangka Barat, Indonesia
Authors:   Bangka Belitung University, Wardhani Rulyanti Susi , Ayuni Devi ,   Universitas Terbuka, Indonesia, Minrohayati Minrohayati ,   Universitas Terbuka, Indonesia
Published: July 2021

Tempilang Village is one of the culture-based villages in Bangka Barat District which has historical value and various cultural attractions. However, there are some factors which may inhibit the position of Tempilang Village as a tourism-based village, such as the inadequate role of the local district government in managing cultural assets, especially in its utilization as a tourism attraction, community involvement in promoting villages and the role of cross sectors in development of cultural and economic potentials in Tempilang Village. This research aimed at formulating a sustainable cultural tourism development strategy to enhance the cultural potential and economic condition of the surrounding local community. This research used descriptive qualitative analysis, content analysis, IFAS EFAS and SWOT matrix. The results of the IFAS and EFAS analysis in the SWOT Cartesian diagram indicated that Tempilang Village is in a favorable position with the dominant strength and opportunity factors and growth strategy as the main focus of the development strategy. Based on the results of analysis of internal and external factors using the SWOT matrix, there were four main strategies for sustainable tourism development to be implemented in Tempilang Village, including strategies for optimizing the management of cultural tourism, strategies for optimizing the potential of home based enterprises in the village to support tourism activities, utilizing intangible culture in the village as a product of cultural tourism and managing tangible cultural assets in the village through opportunities for cooperation.
The Community Participation in Tourism Sustainability and Tourist Satisfaction
Authors:   Politeknik Negeri Sriwijaya, Ridho Sari Lestari Zainal , Paisal Paisal ,   Politeknik Negeri Sriwijaya, Mellita Dina ,   Universitas Bina Darma, Roseno Muhammad Taufik ,   Universitas Sumatera Selatan
Published: July 2021

Purpose: The purpose of this study was to evaluate the role of community in economic sustainability towards post-visit behavior to cultural tourism destinations in the city of Palembang. Research methods: This research is a quantitative study, which examines the relationship between the variables of the role of community, in this case, the community, in the economy sustainability of tourism and several other variables, which is the role of the community in ecological, social, cultural sustainability toward post-visit behavior, in the form of tourist satisfaction. The technique analysis used was multiple regression analysis techniques and the data of this study were collected through a survey in 2019, using a questionnaire of 107 respondents who were tourists who had visited one of the cultural tourism destinations in Palembang. Result and Discussion: The results of this study indicate that the role or participation of community in the sustainability of tourism has a positive and significant effect on visitor or tourist satisfaction Conclusion: the community participation in tourism sustainability is significantly important in order to create tourist satisfaction; hence it’s important to focus on community empowerment.