bluuebunny/crossref_metadata_2025 huggingface dataset:
EIGENFREQUENCIES OF OSCILLATIONS OF A PLATE WHICH SEPARATES A TWO-LAYER IDEAL FLUID WITH A FREE SURFACE IN A RECTANGULAR CHANNEL
Authors:   Mykolayiv National Agrarian University, Lymar О.
Published: December 2021

The frequency spectrum of plane vibrations of an elastic plate separating a two-layer ideal fluid with a free surface in a rectangular channel is investigated analytically and numerically. For an arbitrary fixing of the contours of a rectangular plate, it is shown that the frequency spectrum of the problem under consideration consists of two sets of frequencies describing the vibrations of the free surface of the liquid and the elastic plate. The equations of coupled vibrations of the plate and the fluid are presented using a system of integro-differential equations with the boundary conditions for fixing the contours of the plate and the condition for the conservation of the volume of the fluid. When solving a boundary value problem for eigenvalues, the shape of the plate deflection is represented by the sum of the fundamental solutions of a homogeneous equation for a loose plate and a partial solution of an inhomogeneous equation by expanding in terms of eigenfunctions of oscillations of an ideal fluid in a rectangular channel. The frequency equation of free compatible vibrations of a plate and a liquid is obtained in the form of a fourth-order determinant. In the case of a clamped plate, its simplification is made and detailed numerical studies of the first and second sets of frequencies from the main mechanical parameters of the system are carried out. A weak interaction of plate vibrations on vibrations of the free surface and vice versa is noted. It is shown that with a decrease in the mass of the plate, the frequencies of the second set increase and take the greatest value for inertialess plates or membranes. A decrease in the frequencies of the second set occurs with an increase in the filling depth of the upper liquid or a decrease in the filling depth of the lower liquid. Taking into account two terms of the series in the frequency equation, approximate formulas for the second set of frequencies are obtained and their efficiency is shown. With an increase in the number of terms in the series of the frequency equation, the previous roots of the first and second sets are refined and new ones appear.
EFFICACY OF PROTON PUMP INHIBITORS IN CHILDREN WITH ASTHMA COMBINED WITH GASTROESOPHAGEAL REFLUX DISEASE AND REFLUX ESOPHAGITIS
Authors: Antipkin Yu. G. , Lapshin V. F. , Umanets T. R. , Buratynska А. А. , Chumachenko N. G. , Stepanova L. S. , Tolkach S. I.
Published: December 2021

EFFICACY OF PROTON PUMP INHIBITORS IN CHILDREN WITH ASTHMA COMBINED WITH GASTROESOPHAGEAL REFLUX DISEASE AND REFLUX ESOPHAGITIS Yu. G. Antipkin, V. F. Lapshin, T. R. Umanets, А. А. Buratynska, N. G. Chumachenko, L. S. Stepanova, S. I. Tolkach O. Lukyanova Institute of Pediatrics, Obstetrics and Gynecology National Academy of Medical Sciences of Ukraine, Kyiv, Ukraine Abstract. The most common comorbid pathology in children with asthma is gastroesophageal reflux disease associated with reflux esophagitis, which ranges from 32 % to 80 %. To date, the effectiveness of proton pump inhibitors in this category of children and their effect on the level of asthma control remains controversial. The aim is to study the effectiveness of treatment with proton pump inhibitors in children with asthma, combined with gastroesophageal reflux disease and reflux esophagitis. Materials and methods. Forty-six children aged 6–17 years with asthma combined with gastroesophageal reflux disease and reflux esophagitis were examined. They were taking omeprazole 20 mg once daily for 4-8 weeks to control the symptoms of gastroesophageal dysfunction. Criteria for the effectiveness of the prescribed treatment were the dynamics of symptoms of gastroesophageal reflux disease and the level of asthma control, which were assessed at 4 and 8 weeks of treatment. Assessment of symptoms of gastroesophageal reflux disease was performed according to the questionnaire. The degree of control of asthma was determined using the Asthma Control Test. Results and discussion. There was a complete regression of symptoms of gastroesophageal reflux disease after 4 weeks of treatment with omeprazole in 40 (87.0 %) patients. Only 6 (46.2 %) patients with severe asthma had episodic symptoms of gastroesophageal dysfunction after 4 weeks of omeprazole treatment that were not recorded at 8 weeks of treatment. An increase in the number of children with controlled asthma was observed with omeprazole treatment, but no significant difference was found. Conclusions. Proton pump inhibitors are effective in controlling the symptoms of gastroesophageal reflux disease in children with asthma, but not likely in the short-term level of asthma control. Key words: asthma, treatment, children, reflux esophagitis, gastroesophageal reflux disease.
ПОКАЗНИКИ ЯКОСТІ ЖИТТЯ ОСІБ, ЩО ДОГЛЯДАЮТЬ ЗА ПАЦІЄНТАМИ З ДЕМЕНЦІЄЮ
Authors: Орлова О.В. , Животовська Л.В. , Бойко Д.І. , Боднар Л.А.
Published: December 2021

Dementia is associated with decreased memory, impaired thinking, behavior and ability to perform daily functions. This condition mainly affects the elderly and is one of the main causes of disability. Dementia affects not only patients, their families and caregivers, but society as a whole. The number of people with dementia is on the rise worldwide, and prognosis generally indicates a significant increase in overall prevalence associated with population aging. A large number of patients with dementia are at home, where their family members perform the function of caring for them. With the progression of the disease, patients lose the ability to care for themselves on their own, so the question of outside care arises for their relatives. The aim of this study is to analyze the quality of life indicators in persons performing the function of caring for patients with dementia. It has been found that almost 80% of patients with dementia are cared for by their relatives. Caregivers are at risk of depression, anxiety and psychological stress. In this study, the authors identified factors influencing the mental health of caregivers, among which the degree of dementia and the patient's ability to perform daily activities were significant. In caregivers with a low level of mental tension, manifestations of social maladaptation were less common. Depending on the level of psychological stress, individuals with a high level of tension had lower indicators of quality of life on the scales "physical functioning" (p=0.003), "role functioning due to physical condition" (p<0.001), "social functioning" (p=0.04), "role functioning due to emotional state" (p=0.003), "mental health" (p=0,004). For this category of people, it is recommended to use counseling, psycho-educational activities aimed at understanding the improvement of quality of life.
ОСОБЛИВОСТІ ПЕРЕБІГУ ВАГІТНОСТІ ТА РОЗРОДЖЕННЯ ЖІНОК З ЕКСТРАКОРПОРАЛЬНИМ ЗАПЛІДНЕННЯМ З ГРУПИ ВИСОКОГО РИЗИКУ ПО ВИНИКНЕННЮ ПЕРЕДЧАСНИХ ПОЛОГІВ
Authors: Шиманська Я.В.
Published: December 2021

The article is a part of the research project at the Department of Obstetrics and Gynecology No.2 of Higher Education Institution Poltava State Medical University "The role of chronic infection of the uterus and lower genital tract in the formation of obstetric and gynecological pathology" (state registration No. 0117U005276, implementation period 2017-2022). In modern reproductive medicine, infertility in marriage is considered a problem of particular importance. That is why modern assisted reproductive technologies are chosen as a method of treatment for many married couples, and their increased application necessitates intensive monitoring of the course of pregnancy and delivery. Pregnant women after in vitro fertilization programs are at high risk of miscarriage and preterm birth. The aim of the research was to study the features of pregnancy, childbirth and the condition of newborns in women after in vitro fertilization, which are classified as high risk for preterm birth. Women were included in the study at 18-20 weeks 6 days of pregnancy. We examined 85 women who became pregnant after in vitro fertilization (study group A: 37 pregnant women who refused preventive treatment and received medications in accordance with regulations; study group B: 48 pregnant women who have received the proposed treatment since their inclusion in the study. The control group included 20 apparently healthy pregnant women with its natural pregnancy onset. In pregnant women of study group A, pregnancies ended in premature birth by 1.7 times more often, and most of them occurred before 34 weeks; during pregnancy, there was a greater risk of preterm birth, which required enhanced correction in addition to conservative measures: suturing the cervix and the use of obstetric unloading pessary; the frequency of delivery by cesarean section prevailed by 1.3 times. Moreover, only in this group, pathological bleeding was observed, surgery was performed and perinatal mortality was recorded. Pregnant women who agreed to preventive treatment developed fewer preterm births after 34 weeks. Complications of pregnancy and childbirth were much less common in these women. Surgical intervention in childbirth and the frequency of delivery by cesarean section were also much less common.
Koçlarda spermaya katılan CAPE'in (caffeic acid phenethyl ester) dondurma ve çözdürme sonrası spermatolojik parametreler, oksidatif stres ve DNA hasarı üzerine etkileri
Authors: GÜNDOĞAN Mustafa , YENİ Deniz , AVDATEK Fatih , HAZMAN Ömer
Published: December 2021

Bu çalışmanın amacı koç sperma sulandırıcısına ilave edilen farklı dozlardaki caffeic acid phenethyl ester (CAPE) çözüm sonu spermatolojik parametreler, oksidatif stres ve DNA hasarı üzerine etkileri araştırıldı. Ejakulatlar beş baş Merinos koçtan haftada bir kez suni vajen yardımıyla toplandı ve bu işlem altı kere tekrarlandı. Ejakulatlar ml’de 150x106 spermatozoon olacak şekilde antioksidan içermeyen (kontrol) ve antioksidan içeren (10 µg/ml, 50 µg/ml ve 100 µg/ml) sulandırıcılar ile dört bölüme ayrıldı. Sulandırılan örnekler 0,25 ml’lik payetlerde 5 0C’de 3 saat ekilibrasyona tabi tutulduktan sonra sıvı azot buharında donduruldu. Subjektif motilite yönünden 50 ve 100 μg/ml içeren grupların, kontrol grubuna göre belirgin bir üstünlük sağladığı (P
The Orbital Channel Resource Control on Non-Markov Priority Systems of Mass Service Basis. Part 2. Dispatch Method
Authors: Kovalsky A. , Mitryaev G. , Pitrin A.
Published: December 2021

The article develops a methodology for scheduling an orbital channel resource with operational priority assignment based on the calculation of the parameters of a non-Markov service model with a limited residence time of a request in the system, which differs from known methods in that it takes into account the priority of various network subscribers, taking into account the high dynamics of their movement and the average waiting time in the service system with priority in the allocation of the orbital channel resource of the satellite command-relay system. The analysis of the influence of service quality indicators of information data flows is carried out.

It is shown that the developed method of priority scheduling makes it possible to meet the requirements for the quality of service. A complex of experimental studies was carried out, which showed the possibility of ensuring the required level of stability with the deterioration in difficult conditions of radio electronic equipment, which made it possible to formulate practical proposals for improving the complex of coordination and distribution of resources of in the satellite command relay system.
Functional Model of Communication Network of Microwave Link Stations with Adaptive Modulation and Package Switching
Authors: Odoevsky S. , Kluychnikov V. , Stepanets I.
Published: December 2021

The article describes the model of the communication network functioning, which consist of microwave link stations with adaptive modulation and packet switching. Mathematical expressions are presented, which allow to calculate particular indicators of stability and throughput of microwave link intervals, lines and communication directions, as well as generalized quality indicators of the communication network as a whole, taking into account the peculiarities of the functioning of microwave link stations with adaptive modulation and packet switching under the fading conditions at separate microwave link intervals.
The Improvement of Anti-crіsіs Mаnаgеmеnt System іn Hotеl Business
Authors: Lipych Lubоv , Khilukhа Оksаnа , Kushnir Myroslava , Mаtviichuk Ivаnnа
Published: December 2021

Topicality. Thе predisposition to сrіsіs sіtuаtіons of hotеl enterprises, whісh are thе mаіn іnfrаstruсtural сomponеnt of the hospitality industry in Ukraine, іs hіghеr, сompаrеd to othеr types of economic activity. Thе сurrеnt сrіsіs сondіtіons, саusеd by СOVІD-19 pandemic, wаr іn Eаstеrn Ukrаіnе аnd thе decline of thе fіnаnсіаl аnd есonomіс systеm, led to the case that most hotel enterprises are in a very difficult situation, and some of them are even on the verge of bankruptcy. The necessity to adapt quickly to the changes and to offer the consumers new approaches to business development, innovative methods and technologies of service delivery, new services and new products in compliance with all safety standards and appropriate quality requires from hotel еntеrprіsеs to form an effective anti-crisis management system.
Thе aim and methods. The aim of this аrtісlе іs to develop the recommendations for thе anti-сrіsіs mаnаgеmеnt systеm improvement of thе hotеl еntеrprіsе, taking into account the stage of its life cycle, the index of diversification potential, and the level of the system of anti-crisis management development. To achieve this aim such methods are used: theoretical generalization, analysis and synthesis; statistical; economic and mathematical modeling, and graphic.
Rеsults. Іt іs еstаblіshеd thаt the еffісіеnсy of the hotеl enterprise ovеrсomіng thе сrіsіs situations dеpеnds on іts аbіlіty in quick adaptation to new operating conditions and moving to thе provіsіon of nеw advanced sеrvісеs or thе іntroduсtіon of the nеw typе of асtіvіty. Durіng thе сrіsіs mаny еntеrprіsеs аrе dеvеlopіng the strаtеgy of dіvеrsіfісаtіon, whісh саn bе an еffесtіvе tасtісs for some short tеrm, or morе fundаmеntаl strаtеgy for thе mеdіum аnd long tеrm pеrіod. Thе hotеl enterprises are forced to rеnеw the sеrvісеs аnd produсts, dіstrіbutіon сhаnnеls, dеlіvеry mеthods аnd mаrkеtіng strаtеgy сonstаntly, thеrеforе, the dіvеrsіfісаtіon of their асtіvіty should bе a pаrt of thе anti-сrіsіs enterprise mаnаgеmеnt systеm.
Conclusions and discussions. The effесtіvе anti-сrіsіs mаnаgеmеnt provides thе nееd to dеtеrmіne thе lеvеl of its systеm dеvеlopmеnt, thе аssеssmеnt of thе іndеx of thе hotеl еntеrprіsе dіvеrsіfісаtіon potеntіаl, thе formаtіon of the mаtrіx of dіvеrsіfісаtіon strаtеgy сhoісе аnd thе mесhаnіsm for іts іmplеmеntаtіon. Thе prасtісаl sіgnіfісаnсе of this rеsеаrсh іs in the anti-crisis management system, bаsеd on thе dіvеrsіfісаtіon strаtеgy, whісh аllows to mаkе аdеquаtе dесіsіons on strаtеgіс plаnnіng of thе hotеl enterprise activity іn сondіtіons of іnstаbіlіty.
Scientific Substantiation of the Technology of the Functional Beverage, Based on the Rowan Juice with Vegetative Extracts Use
Authors: Stetsenko Natalia , Goyko Irina
Published: December 2021

Topicality. Modern manufacturers of foodstuff and beverages are faced with the task of creating the new generation nutritive – sanative and functional, including drinks, that can have a positive impact on consumers’ health condition. Functional beverages are intended for systematic usage in the diet compound for all healthy population age groups; they are able to reduce the risk of diseases development, caused by nutrition, maintain and improve health state due to the presence of physiologically functional ingredients in their complement (vitamins, phenolic compounds, dietary fibers, carotenoids, organic acids, minerals).
Aim and methods. The aim of this article is to substantiate the rowan juice choice for the functional meaning drink creation, to determine its composition and physico-chemical indicators, the selection of effective formula components with antioxidant effect, and the working of the non-alcoholic drink with sanative qualities technology. In this work standard organoleptic, physico-chemical and calculated research methods are used.
Results. It was proved that the rowan juice should be used as the basis for the juice-containing beverage of functional meaning. For maximal juice extraction, it is necessary to pre-freeze the raw material, followed by its grinding and enzymatic preparation machining. Green tea and sage extracts, which are sources of antioxidant effect substances, were chosen as a supplement to the rowan juice.
Discussion and conclusions. It is established that the non-alcoholic juice-containing beverage belongs to the category of functional foodstuff, as during its using the level of daily needs providing of ascorbic acid, β-carotene, pectin, bioflavonoids, catechins is within 10...50%. The scientific novelty of this research lies in the technology development of the juice-containing functional beverage on the basis of rowan juice with vegetative extracts use. The practical significance of the received results is in their usage at enterprises, producing non-alcoholic beverages, in restaurant industry and sanatorium-resort catering establishments.
Tourist Potential of Castle Tourism in Podillia-Bukovyna Tourist Cluster
Authors: Antonenko Volodymyr , Khutkyi Volodymyr , Melnyk Denys
Published: December 2021

The article analyzes the state of castle tourism development in the Podillia-Bukovyna tourist cluster, its role and significance for the development of tourism in the region. The logistical potential of Khotyn and Kamianets-Podilskyi castles has been calculated. The main problems that hinder the sustainable development of castle tourism and the main objects of castle tourism in the tourism cluster and the features of their preservation have been identified.
Speculation with the Term ‘Museum’ in the Names of Consumer Infrastructure Entities and on the Pages of the Periodical Press
Authors: Boiko-Haharin Andrii , Makarenko Mariia
Published: December 2021

The purpose of the article is to outline the current problems in modern museum studies regarding the negative impact on the public perception of museum activities of the manipulation of the term ‘museum’ in the names of consumer infrastructure and periodicals. Research methodology. General scientific research methods were used, in particular historical, method of analysis, typological, method of analogies, method of generalization. Scientific novelty. The state and degree of speculation research with the term ‘museum’ in the names of elements of consumer infrastructure are determined. It is revealed that such a phenomenon did not originate in the 21st century but has existed since pre-Soviet times. It is determined why the speculation process with the term ‘museum’ is so popular in Ukraine and abroad. Conclusions. The article reflects the position of the authors on the use of the term ‘museum’ in the names of consumer infrastructure institutions – cafes, restaurants; usually carried out in order to use the authority of museums to attract new customers and consumers. Today it is popular to decorate catering establishments and cafes using antiques without investing in a special concept or design. A proposal was made to amend the legislation on the names of legal entities.
Forstpolitik in der EU: Zur Bedeutung der Europäischen Kommission in einem dynamischen Politikfeld
Authors: Böhling Kathrin , Eisele Helena
Published: December 2021

In der Europäischen Union gibt es keine vertraglich geregelte gemeinsame Forstpolitik, faktisch jedoch ein Politikfeld, das für die Wälder und die Waldbewirtschaftung in Europa relevant ist. Der vorliegende Beitrag widmet sich der Rolle der Europäischen Kommission in diesem kontrovers diskutierten Politikfeld, das sich dynamisch entwickelt. Mithilfe interpretativer Ansätze der Politikfeldanalyse wird gezeigt, dass die Kommission forstpolitisch agiert: Sie nutzt die ihr übertragenen Kompetenzen, um die Ansprüche an Wälder zu regeln, die zugenommen haben. Waldreiche EU-Mitgliedstaaten sind gefordert, sich verstärkt in EU-Politikprozesse einzubringen und eine in die Zukunft gerichtete Gestaltung des Subsidiaritätsprinzips zu gewährleisten.
Zukünftige Potenziale der nachhaltigen Waldenergieholzversorgung in der Schweiz
Authors: Erni Matthias , Thees Oliver , Lemm Renato , Stadelmann Golo , Schweier Janine , Zenner Eric K.
Published: December 2021

Mit der Entwicklung eines konzeptionellen Rahmens sind wir in der Lage, die Auswirkungen ökologischer und ökonomischer Restriktionen auf die räumlich-zeitliche Verfügbarkeit von Waldenergieholz in der Schweiz zu quantifizieren. Wir haben sie über einen Zeitraum von 40 Jahren für drei Waldbewirtschaftungsszenarien und zwei Holzmarktsituationen mit und ohne Subventionen für die Bewirtschaftung von Schutzwäldern simuliert. Ökologische und ökonomische Restriktionen schränkten die Verfügbarkeit von Waldenergieholz stark ein. Das theoretische Potenzial entsprach der jährlichen Holzproduktion von 9 bis 16 Mio. m3/a oder 67 bis 118 PJ/a. Ökologische Restriktionen reduzierten es auf etwa die Hälfte bis ein Drittel, die zusätzlichen ökonomischen auf ein Drittel bis ein Fünftel (14–41 PJ/a), und nach Abzug der aktuellen Nutzung verblieb ein Zehntel des theoretischen Potenzials oder weniger. Verglichen mit der derzeitigen Waldbewirtschaftung erhöhten die Szenarien zum Vorratsabbau die verfügbaren Energieholzmengen über 40 Jahre um das Drei- bis Vierfache – dies insbesondere kurzfristig. Günstige Energieholzmärkte erhöhten die Verfügbarkeiten um 20 bis 25% und Subventionen um 30%, vor allem in den alpinen Regionen. Unter den aktuellen Marktpreisen sind das Mittelland und der Jura mit den grössten ungenutzten Potenzialen und der geringsten Abhängigkeit von Subventionen vielversprechende Regionen für die Energieholzmobilisierung. Die Reduktion der Vorräte bietet sich an, um in der frühen Phase der Energiewende mehr Energieholz im Wald zu nutzen und auf diese Weise Versorgungslücken anderer erneuerbarer Energien auszugleichen.
Semicircles in the Arbelos with Overhang and Division by Zero
Authors: Okumura Hiroshi
Published: December 2021

We consider special semicircles, whose endpoints lie on a circle, for a generalized arbelos called the arbelos with overhang considered in [4] with division by zero.
A Rarity in Geometry
Authors: Odehnal Boris
Published: December 2021

We study the locus C of all points in the plane whose pedal points on the six sides of a complete quadrangle lie on a conic. In the Euclidean plane, it turns out that C is an algebraic curve of degree 7 and genus 5 and not of degree 12 as it could be expected. Septic curves occur rather seldom in geometry which motivates a detailed study of this particular curve. We look at its singularities, focal points, and those points on C whose pedal conics degenerate. Then, we show that the septic curve occurs as the locus curve for a more general question. Further, we describe those cases where C degenerates or is of degree less than 7 depending on the shape of the initial quadrilateral
Visualization of Sphere and Horosphere Packings Related to Coxeter Tilings by Simply Truncated Orthoschemes with Parallel Faces
Authors: Yahya Arnasli , Szirmai Jenő
Published: December 2021

In this paper we describe and visualize the densest ball and horoball packing configurations to the simply truncated 3-dimensional hyperbolic Coxeter orthoschemes with parallel faces, using the results of [24]. These beautiful packing arrangements describe and show the very interesting structure of the mentioned orthoschemes and the corresponding Coxeter reflection group. We use the Beltrami-Cayley-Klein ball model of 3-dimensional hyperbolic space H^3, the images were made by the Python programming language.
Internet User Stickiness in the Social Q & A Community from the Perspective of Interactivity – A Case Study on Zhihu Website
Authors: Yuan Sheng-jun , Chen Jia-xin
Published: December 2021

This paper mainly explores how the user’s perceptual interaction towards a specific website affects the user stickiness and the interaction mechanism of various influencing factors of user stickiness, which may encourage socialized Q & A community operators to adopt more appropriate ways to enhance user’s stickiness. We comprehensively use the planning behavior theory and technology acceptance model with the perceptual perspective of interaction. Based on the framework of “belief → attitude → intention”, an attempt is made to construct a conceptual model of influencing factors of user stickiness in socialized Q & A community by collecting the data through questionnaire survey, and using spss23.0 and amos23.0 to analyze the data and validate the model. The empirical research results prove that the factors such as perceived usefulness, perceived ease of use, information exchange perception, social interaction perception satisfaction, and heart flow experience have positive effects on social users. We conclude that the operators can build and consolidate user engagement, attract and retain the users by enhancing interactive perception, optimizing user experience, and improving their satisfaction.
Multi-Stage Prediction of Feed System Time Series
Authors: Shen Lihua , Wang Biling , Liu Hongjun
Published: December 2021

In order to reduce the tracking error of the computer numerical control (CNC) feed system and improve the CNC machining accuracy, a novel prediction model is proposed based on fuzzy C-means robust variational echo state network. Firstly, the feed speed time series is clustered, and then reconstructed for different categories. The multi-stage robust prediction models are established to realize the multi-state robust prediction of the CNC machining feed velocity to reduce the tracking error of the feed system. Finally, the reference and actual time series with different feed speed are used to verify the established models. The results show that the proposed method can reduce the tracking error and realize the effective prediction of the time series of the feed system.
Study on Dune Morphology in Computer Mapping Based on 3S Technology
Authors: Ba Zhidan
Published: December 2021

Take the parabolic dune of Hobq desert in Inner Mongolia as research object. Based on the GIS platform by using differential GPS data and spatial interpolation to generate DEM, then using Multi-periods high resolution images to acquire the environmental background, at the same time combine with regional wind regime and vegetation condition to measure and analyze the morphology of the parabolic dune. The result shows that the parabolic dune showed U shape in plane, and dune arms point to the west which was also wind direction. The windward slope of longitudinal profile is gentler, while leeward slope is steeper. And cross section wasn’t symmetric. The dune’s average moving speed is 11.76 m/yr. Desert ridge line’s medial axis direction is WNW-ESE, in accord with the direction of prevailing wind and resultant drift potential. Artemisia Ordosicas mainly distribute on leeward slope, two arms, and the plane ground between them, and the annual average vegetation coverage decreased 0.95%. In the long-term effect of resultant wind, the dune keeps moving forward and Artemisia Ordosica between two arms show gradual natural stage recovery which presented zonal distribution. 3S technology has already become important research method in modern Aeolian sand morphology.
Online Life Forecasting Method and State Assessment Architecture of Power Cable Based on Recurrent Neural Network and Internet of Things
Authors: Song Changcheng , Xue Binglei , Lu Fumu , Lan Feng , Yang Zheng , Zhang Chunlei , Yuan Peiran
Published: December 2021

For the purpose of increasing the accuracy of power cable life forecasting and status assessment, improving its life cycle management process, this paper proposes a power cable online life forecasting method and status assessment system based on recurrent neural network and Internet of Things (IoTs). Power cable electrical insulation online monitoring system is established on the first place. Then, recurrent neural network and fuzzy analytical hierarchy process are used in the IoTs based power cable online status assessment architecture to proceed life forecasting and status assessment process. Lastly, example analysis is presented to verify the effectiveness and superiority of the methodology introduced in this paper. It is shown that artificial intelligence and IoTs will also have broad development and application prospect when combined with power cable life cycle management.
Virtual Power Plant Platform for Demand Response Based on Microservice Architecture
Authors: Jiang Guodong , Xie Zuixi , Han Tao , Du Hongwei , Feng Rongqiang , Luo Shouquan , Wu Xueqiong , Zhang Jiaqi
Published: December 2021

It is a trend to use virtual power plant technology to realize demand response and participate in electricity trading. We design and implement the software control platform of virtual power plant for demand response. For this software platform, we analysed the requirements and got the overall architecture of the platform. On this basis, we design and implement the microservice architecture, interface design, basic application function design, advanced application function design, hardware architecture, communication architecture and security encryption of the platform. Finally, we summarize the application of the platform, and put forward the direction of further research and development.
Application Status and Research of Instrumentation Device in Solar Thermal Power Generation Industry
Authors: Xie Xiaojun , Xi Hang , Wu Qiong , Zhang Ruigang , Yang Bo , Liu Zengbo
Published: December 2021

The solar thermal power generation system adopts a dual-axis timely tracking instrument device, which realizes that the sunlight and the central axis of the heliostat instrument device are kept parallel, and greatly improves the utilization efficiency of the light source and the power generation efficiency. At the same time, the study of instrumentation selection in the solar thermal power generation industry cannot be ignored, which can guarantee the normal operation and basic work quality of solar thermal power projects. Therefore, based on instrumentation devices in the solar thermal power generation industry, this article explores the drawbacks of instrumentation devices in the application, and puts forward several research ideas for the drawbacks. Finally, by taking the tower-type solar thermal power generation instrument device as an example.
Research on Identification of Power Grid Weakness Based on Bayesian Inference
Authors: Hu Jiang , Li Wei , Liu Wenxia , He Xianggang , Zhang Yu
Published: December 2021

With the gradual reform and development of the power grid, it is of great significance to study how to effectively identify and evaluate the weak links of the power grid for the actual planning, construction, and operation of the power grid. This paper analyzed the power grid’s historical component data and real-time operation state parameters. We established a weak link identification model based on Bayesian reasoning. Firstly, we constructed the node branch Bayesian network according to the network topology relationship. The power transmission distribution factor is modified according to the historical operation load of the grid components, and the conditional probability table is calculated based on the grid structure; finally, we used the maximum possible explanation algorithm in the Bayesian network. The weakness degree of all components in the network is calculated, and the maximum probability weak link sequence is obtained. The correctness and effectiveness of the proposed method are verified by IEEE 39 bus simulation and regional power grid data.
Development and Application of Virtual Simulation Teaching Platform for the Transcritical CO2 Two-Stage Compression Refrigeration System Based on LabVIEW
Authors: Sun Yuyao , Wang Jinfeng , Xie Jing , Wu Chenlong
Published: December 2021

Based on the principle of transcritical CO2 two-stage compression refrigeration system, a virtual simulation teaching platform was developed. Two operation modes can be selected which are practice mode and test mode. According to questions and tips about experiments, students can do simulation experiments by open required valves, running the refrigeration system, adjusting pressure control valves and so on. When these operations are completed, students can save the file of the simulation experiment and exit the system. Then, test marks of students can be exported to Excel for teachers to view. In addition, some risks of operational errors can also be avoided, such as equipment damage. Moreover, if there is a computer, the simulation experiments can be done by this virtual simulation teaching platform, which is very convenient. The virtual simulation teaching platform is innovative and practical. The application of this virtual simulation teaching platform can improve the quality of the traditional teaching in the refrigeration field.
Design of Bluetooth Automatic Check in System Without Operation Based on Cross Mobile Platform
Authors: Bao Yiqin , Sun Zhengtang
Published: December 2021

Because the traditional way of sign in is not to call the roll, or sign in on the paper list, or sign in through fingerprint recognition and face recognition, on the one hand, it is cumbersome and time-consuming, on the other hand, it is non-human. The update of roll call sign in is a hot topic at present, and many new schemes rush out. This paper introduces the automatic sign in system based on Bluetooth technology, which does not rely on the mobile phone operating system, does not need the mobile phone installation software, as long as you bring a mobile phone, you can realize automatic sign in. This paper designs and implements the automatic check-in system, and compares it with other ways, proving that it is an innovative check-in method.
A Novel Dual Mode Decision Directed Multimodulus Algorithm (DM-DD-MMA) for Blind Adaptive Equalization
Authors: Tadmor Sagi , Carmi Sapir , Pinchas Monika
Published: December 2021

In this paper, we propose for the 16 quadrature amplitude modulation (QAM) input case, a dual-mode (DM), decision directed (DD) multimodulus algorithm (MMA) algorithm for blind adaptive equalization which we name as DM-DD-MMA. In this new proposed algorithm, the MMA method is switched to the DD algorithm, based on a previously obtained expression for the step-size parameter valid at the convergence state of the blind adaptive equalizer, that depends on the channel power, input signal statistics and on the properties of the chosen algorithm. Simulation results show that improved equalization performance is obtained for the 16 QAM input case compared with the DM-CMA (where CMA is the constant modulus algorithm), DM-MCMA (where MCMA is the modified CMA) and MCMA-MDDMA (where MDDMA is the modified decision directed modulus algorithm).
Complex-Coefficient Microwave Photonic Filter Based on Orthogonally Polarized Optical Single-Sideband Modulation
Authors: Qian Jinwang , Sun Junling , Ma Pengge , Gao Xinlu , Huang Shanguo
Published: December 2021

A complex-coefficient microwave photonic filter with continuous tunability is proposed and experimentally demonstrated. The filter taps are based on a 360° tunable microwave photonic phase shifter, which is realized by orthogonally polarized optical single-sideband (OSSB) modulation. The experimental results are shown and regarded as good performance for the proposed filter. The phase shift for the two taps covers a full 360° range from 8 GHz to 26 GHz. Frequency responses with different center frequency are measured within 20–21 GHz with the full free spectral ranges (FSRs) of 185 MHz and 285 MHz, respectively.
Hipertensão secundária: abordagem nos cuidados de saúde primários
Authors:   Médico de Família, Costa Tiago , Leitão Diana Catarina Coelho ,   Médico de Família
Published: December 2021

Objetivos: Identificar situações sugestivas de hipertensão secundária (HS). Rever a fisiopatologia, manifestações clínicas e/ou laboratoriais, diagnóstico e tratamento das principais formas de HS, bem como estabelecer o papel do médico de família na sua abordagem à luz da evidência mais recente. Fontes de dados: MEDLINE/PubMed, The Cochrane Library, UpToDate, U.S. Preventive Services Task Force e normas de orientação clínica da Direção-Geral da Saúde. Métodos: Foi realizada a pesquisa de artigos científicos em plataformas online de medicina baseada em evidência utilizando as palavras-chave Secondary Hypertension e Primary Health Care. A pesquisa foi realizada em julho de 2019, sendo a seleção dos artigos feita com base no título, conteúdo do resumo e data de publicação. Foram também consultadas normas de orientação clínica e guidelines. Resultados: A HS deve ser suspeita em contexto de hipertensão resistente, início de hipertensão antes dos 30 anos num utente sem fatores de risco, elevação súbita ou instabilidade da pressão arterial basal, hipertensão maligna ou acelerada, início de hipertensão diastólica em idosos, hipertensão associada a distúrbios hidro-eletrolíticos ou hipertensão associada a clínica sugestiva de determinada etiologia específica. Em crianças e adolescentes, as principais causas de HS são as doenças do parênquima renal, ao passo que nos adultos as etiologias mais comuns incluem a síndroma da apneia obstrutiva do sono, doenças do parênquima renal, estenose da artéria renal, hiperaldosteronismo primário e feocromocitoma. O reconhecimento de manifestações clínicas e/ou laboratoriais sugestivas da etiologia da HS deve orientar a realização dos testes de rastreio para posterior tratamento ou referenciação. Conclusão: Avaliar em todos os utentes hipertensos a existência de causas secundárias não é custo-efetivo, pelo que apenas devem ser estudados os utentes com características sugestivas de HS. A realização e interpretação dos testes de rastreio de forma adequada é fundamental para a referenciação e tratamento dos utentes com HS.
Perder um filho em idade pediátrica: estudo qualitativo do apoio ao luto parental
Authors:   Médico de Família, Costa Ana Rita , Almeida Filipe ,   Médico de Família
Published: December 2021

Objetivos: A perda de um filho em idade pediátrica é uma das vivências mais dolorosas que o ser humano pode enfrentar, sendo que o luto parental é um processo intenso e dinâmico que urge acompanhar e apoiar. Assim, pretende-se identificar necessidades a suprir no apoio prestado pelos profissionais de saúde e pela entidade Centro Hospitalar Universitário de São João (CHUSJ) a pais que vivenciaram a morte de um filho em idade pediátrica por doença oncológica e delinear recomendações para a melhoria desse apoio. Métodos: Estudo qualitativo baseado em entrevistas semiestruturadas a pais que perderam um filho em idade pediátrica por doença oncológica, acompanhados no Serviço de Oncologia Pediátrica (SOP) do CHUSJ. Após transcrição das entrevistas procedeu-se à análise qualitativa dos dados com recurso ao software ATLAS.ti. Resultados: Os dados colhidos confirmam o impacto que a doença oncológica e a perda de um filho têm na vida de um pai a nível pessoal, familiar, social e profissional. Identificaram-se pontos fortes nos apoios prestados a nível emocional, instrumental e informacional, principalmente ao longo do período de doença e fim de vida (luto antecipatório). Os principais aspetos a melhorar pela entidade hospitalar e pela equipa de profissionais de saúde relacionam-se com a comunicação de más notícias, articulação com outras unidades de saúde (e.g., cuidados de saúde primários) ou de ação social e prestação de apoio psicológico. Destaca-se a necessidade de reforçar o apoio ao luto após a morte do filho. Conclusão: À semelhança do realizado em vários países, é pertinente investir nos cuidados paliativos pediátricos e na estruturação de programas formais de apoio ao luto parental. Neste sentido, considera-se importante estudar mais aprofundadamente esta realidade a nível nacional, para melhor definir os pontos a reforçar no apoio prestado a quem perde um filho.
Quando o tratamento se torna causa da doença
Authors:   Médico de Família, Oliveira Jaime , Peixoto Fabiana ,   Médico de Família, Monteiro Joana Silva ,   Médico de Família
Published: December 2021

Introdução: A cefaleia é uma queixa frequente, não sendo raros os casos de automedicação. Este artigo relata a abordagem da cefaleia por uso excessivo de medicamentos (CUEM) numa doente automedicada com analgésicos, cuja intervenção foi dificultada pela má adesão ao acompanhamento médico. Descrição do Caso: Mulher de 41 anos, empregada de limpeza. Antecedentes de enxaqueca desde a adolescência, agravada depois do segundo parto, com episódios semanais, sem alívio após tentativa de vários fármacos. Em 2015, após referenciação para consulta de neurologia, iniciou profilaxia com amitriptilina, tendo suspendido precocemente e abandonado o seguimento. Nos três anos seguintes teve consultas motivadas por doença aguda na unidade de saúde familiar, sem acompanhamento regular. Por persistência da enxaqueca recorreu ao serviço de urgência em jan/2018, onde foi referenciada novamente à consulta de neurologia, constatando-se automedicação com paracetamol + codeína, vinte supositórios em cada episódio de enxaqueca (com duração de três dias). Iniciou profilaxia com topiramato e agendou-se nova consulta. Suspendeu topiramato por emagrecimento e faltou à consulta. Recorreu à consulta da médica de família (MF) em jan/2019, referindo tristeza, insónia, obstipação e emagrecimento. Mantinha os episódios semanais de enxaqueca e o uso de supositórios. Após despiste de causa orgânica diagnosticou-se perturbação depressiva e CUEM. Explicou-se que o abuso medicamentoso poderia causar cefaleia e que o tratamento passaria pela cessação do fármaco. Foi medicada com antidepressivos e, nas consultas de reavaliação, constatou-se recuperação ponderal, melhoria do humor, cefaleia menos frequente e redução do uso de supositórios até à abstinência. Comentário: A CUEM desenvolve-se pelo uso excessivo de medicação para a cefaleia, sendo a suspensão da medicação o único tratamento eficaz. A doente manteve uma situação de abuso medicamentoso durante oito meses, tendo como consequência uma CUEM e correndo risco de toxicidade hepática. O MF é fulcral na deteção e abordagem precoce do abuso medicamentoso.
Atualização sobre a definição, consequências e diagnóstico da sarcopenia: uma revisão literária
Authors: Oliveira Vitor , Deminice Rafael
Published: December 2021

Introdução: A sarcopenia é definida como uma desordem muscular esquelética progressiva e generalizada que está associada a maior probabilidade de complicações de saúde, incluindo quedas, fraturas, incapacidade física e mortalidade. Esta desordem, anteriormente entendida como uma condição inerente à idade, apresenta causas diferentes e afeta muitos indivíduos independentemente da idade. A sarcopenia é atualmente reconhecida como uma condição patológica e foi incluída na Classificação Internacional de Doenças (CID-10-CM – M62.84). Objetivo: Apresentar uma revisão literária sobre as causas da sarcopenia, epidemiologia e forma e métodos de diagnóstico atualmente utilizados. Fontes de dados: MEDLINE/PubMed, Embase e SciELO (pesquisa inicial) e referências bibliográficas dos artigos selecionados da pesquisa primária (pesquisa em cascata). Métodos de revisão: Utilizou-se uma combinação dos seguintes termos: sarcopenia, diagnóstico, definição operacional, prevalência, consequências. Foram considerados artigos originais, artigos de revisão, diretrizes clínicas e consensos em inglês e português publicados desde 1989 (ano da proposta do termo sarcopenia) até maio de 2020. Resultados: As principais referências selecionadas foram os artigos que tratavam da definição de sarcopenia. Foram também selecionados os artigos relacionados com testes e avaliações utilizados para o diagnóstico da sarcopenia e artigos que descrevem a prevalência da sarcopenia em diferentes populações. Conclusões: Considerando a evolução histórica do diagnóstico da doença, é notório tentar aproximar o conhecimento científico da prática clínica com a sugestão de métodos e pontos de corte que facilitam a identificação imediata da sarcopenia. No entanto, há um elevado número de diferentes posições e definições operacionais de sarcopenia, o que dificulta a determinação da prevalência real. Apesar dos recentes desenvolvimentos na compreensão da sarcopenia, uma definição operacional definitiva e a melhor forma de diagnosticar a sarcopenia ainda são motivo de debate. Assim, acredita-se que a atual definição operacional não é definitiva e pode sofrer alterações consideráveis à medida que o conhecimento sobre a sarcopenia se desenvolve.
Fermentasi Litter Broiler dengan Lama Inkubasi yang Berbeda dan Pengaruhnya terhadap Produksi Protein Total dan Kecernaan Protein secara In-Vitro
Authors: Christiyanto Marry , Pangestu Eko , Sari Betty Mega Kartika , Utama Cahya Setya
Published: December 2021

Litter broiler dapat dimanfaatkan sebagai pakan alternatif ruminansia karena kandungan nutrien yang masih baik. Penelitian bertujuan mengkaji produksi protein total dan kecernaan protein dari litter broiler fermentasi dengan lama inkubasi yang berbeda secara in vitro. Rancangan percobaan yang digunakan yaitu Rancangan Acak Lengkap (RAL)  dengan 4 perlakuan  dan 4 ulangan. Perlakuan lama inkubasi adalah T0 = fermentasi 0 minggu (0 hari), T1 = fermentasi 3 minggu (21 hari), T2 = fermentasi 6 minggu (42 hari), dan T3 = fermentasi 9 minggu (63 hari). Parameter penelitian meliputi produksi protein total dan kecernaan protein litter broiler. Hasil penelitian menunjukan bahwa perlakuan lama fermentasi yang berbeda memberikan pengaruh berbeda nyata (p<0,05) terhadap produksi protein total dan kecernaan protein kasar. Produksi protein total litter broiler berturut-urut T0, T1, T2, dan T3 adalah 666 mg/g, 822 mg/g, 914 mg/g, dan 934 mg/g. Kecernaan protein litter broiler berturut-urut T0, T1, T2, dan T3 adalah 47%, 51,3%, 53,2% dan 53%. Kesimpulan dari penelitian adalah semakin lama inkubasi litter broiler fermentasi meningkatkan produksi protein total dan kecernaan protein. Fermentasi litter broiler terbaik pada lama inkubasi 6 minggu.
Analisis Pendapatan Usaha Peternakan Kerbau pada Kawasan Pengembangan Kabupaten Sijunjung
Authors: Putra Riza Andesca , Rahmi Elfi , Madarisa Fuad
Published: December 2021

Penelitian ini bertujuan untuk mengetahui pendapatan peternak dan efisiensi usaha peternakan kerbau yang dilakukan masyarakat Kabupaten Sijunjung. Penelitian dilakukan di wilayah Kabupaten Sijunjung yaitu pada peternak di daerah terpilih pada bulan November 2020. Penelitian ini menggunakan metode survey dengan respondennya adalah peternak kerbau sebanyak 50 orang responden. Data yang dianalisis adalah data 1 tahun berjalan yaitu bulan Oktober 2019 - September 2020. Berdasarkan hasil penelitian dapat disimpulkan bahwa pendapatan masyarakat peternak Kabupaten Sijunjung dari usaha peternakan kerbau adalah sebesar Rp 6.644.344/peternak/tahun. Kemudian dari analisis R/C ratio, didapatkan nilai 8,07 yang artinya usaha yang dilakukan sudah efisien dan layak untuk dilanjutkan.