bluuebunny/crossref_metadata_2025_split huggingface dataset:
Application of modified starch in high-temperature-resistant colloidal gas aphron (CGA) drilling fluids
Authors: Zhu Wenxi , Zheng Xiuhua 
Published: May 2021

Abstract
Colloidal gas aphrons (CGA) are finding increasing application in depleted oil and gas reservoirs because of their distinctive characteristics. To overcome the limitations of its application in high-temperature drilling, a modified starch foams stabilizer WST with a temperature resistance of 160 °C was synthesized via radical polymerization. The chemical structure of WST was characterized by Fourier infrared spectroscopy and results showed that all three monomers acrylamide, 2-acrylamido-2-methyl-1-propane sulfonic acid, and N-vinylpyrrolidone have been grafted onto starch efficiently. Based on the microscopic observations, highly stable aphrons have been successfully generated in the WST-based CGA drilling fluids within 160 °C, and most aphrons lie in the range of 10–150 μm. WST can provide higher viscosity at high temperatures compared to xanthan gum, which helps to extend foam life and stability by enhancing the film strength and slowing down the gravity drainage. Results show that WST-CGA aged at elevated temperatures (120–160 °C) is a high-performance drilling fluid with excellent shear-thinning behavior, cutting carrying capacity, and filtration control ability. The significant improvement of filtration control and well-building capability at high temperatures is an important advantage of WST-CGA, which can be attributed to the enhancement of mud cake quality by WST.
Graf Johann Mailáths „österreichischer“ Briefwechsel.
Authors: Tamássy-Lénárt Orsolya 
Published: May 2021

AbstractThe present paper deals with the correspondence of Count Johann Mailáth, a supranational go-between in the first half of the 19th century. The essay is a stocktaking of Mailáth's letters, they are collected in the Austrian National Library and the Vienna City Library. The author of the article would like to show that 1) Count Mailáth can be seen as a multiple “Grenzgänger” between communication spaces, languages and genres and 2) that the analysis of his multilingual and multiethnic network can determine several turning points in his writing career. The aim of the contribution is to supplement the previously known biography of the author and to define epochal boundaries in his oeuvre.
Spectral modal modeling by FEM of reinforced concrete framed buildings irregular in elevation
Authors: Kheira Camellia Nehar 
Published: May 2021

AbstractThe irregular buildings constitute a large part of urban infrastructure and they are currently adopted in many structures for architectural or esthetic reasons. In contrast, the behavior of these buildings during an earthquake generates a detrimental effect on their regularity in elevation which leads to the total collapse of these structures.The objective of this work is essentially to model reinforced concrete framed buildings irregular in elevation subjected to seismic loads by the Finite Element Method (FEM). This modeling aims to evaluate several parameters: displacements, inter-storey drifts and rigidities, using two dynamic calculation methods; one modal and the other spectral modal. The latter is widely used by engineers.For this purpose, a detailed study of the frames which have several setbacks in elevation is carried out to validate the correct functioning of our FEM calculation code in both cases of modal and modal spectral analyses. The performance, accuracy and robustness of the FEM calculation code produced in this study is shown by the good correlation of the obtained results for the treated frames with those obtained using the ETABS software.
Cardiovascular risk factors and blood pressure response to various types of exercise in veteran athletes
Authors: Shmoilova A. S. , Vyalova M. O. , Shvarts Yu. G. 
Published: May 2021

Aim. To study the main cardiovascular risk (CVR) factors and assess the blood pressure (BP) response to various types of exercise in veteran athletes.Material and methods. In order to identify the main CVR factors, 234 competitive athletes and 29 persons practicing physical training were interviewed. We also measured their pre- and post-exercise BP. The previously diagnosed hypertension (HTN) was also taken into account.Results. Among the participants, HTN was diagnosed in 48,5% of athletes, obesity — in 21%, smoking — in 22,9%, while 15,5% had a positive family history of coronary artery disease. The combination of two or more studied risk factors was observed in 35,7% of the subjects. The prevalence of the studied risk factors in participants significantly depended on the type of physical activity. The most unfavorable situation was obtained among hockey players. The highest pre-exercise diastolic BP values were registered in football players (p<0,05), while after exercise, in hockey and football players. In persons with obesity and HTN, the pre- and post-exercise systolic and diastolic BP, as well as the double product, were significantly (p<0,05) higher than in those without HTN and obesity.Conclusion. Veteran athletes practically do not differ from the general population in prevalence of HTN, smoking, and obesity. Elevated pre-and post-exercise BP values (>139/89 mm Hg) was recorded in >40% of veteran athletes. The highest BP levels were found among volleyball and football players. The factors predisposing to such an increase in pre- and post-exercise BP in veteran athletes are obesity, diagnosed HTN, and a positive family history of coronary artery disease. There is reason to consider BP >139/89 mm Hg in the early recovery period as an unfavorable indicator.
Effectiveness of myocarditis therapy depending on the diagnosis approach (with or without myocardial biopsy)
Authors: Blagova O. V. , Nedostup A. V. , Sedov V. P. , Zaitsev A. Yu. , Novosadov V. M. , Kogan E. A. 
Published: May 2021

Aim. To evaluate the effectiveness of myocarditis therapy depending on the diagnosis approach (with or without myocardial biopsy).Material and methods. The study included 83 patients ≥18 years old with severe and moderate myocarditis (25 women and 58 men; mean age, 45,7±11,7 years), established by myocardial biopsy (group 1, n=36) or by a non-invasive diagnostic algorithm (group 2, n=47), for which immunosuppressive therapy (IST) was carried out. Inclusion criteria were left ventricular (LV) end-diastolic dimension >5,5 cm and ejection fraction (EF) <50%. An endomyocardial (n=31) or intraoperative (n=5) biopsy with a study of the viral genome and level of anticardiac antibodies were performed. Coronary angiography (29%), cardiac multislice computed tomography (75%), cardiac magnetic resonance imaging (41%), and 99mTc-MIBI scintigraphy (35%) were also carried out. The mean follow-up period was 3 years (36 [12; 65] months). The study was approved by the Intercollegiate Ethics Committee.Results. The groups were completely comparable in age, baseline parameters (class III [2,25; 3] and III [2; 3] heart failure (HF); end-diastolic LV dimension, 6,7±0,7 and 6,4±0,7 cm; EF, 29,9±8,7 and 31,4±9,3%), the extent of cardiac therapy (excluding the administration rate of в-blockers — 94,4 and 78,7%, p<0,05) and 1ST (methylprednisolone in 91,7 and 89,4% of patients at a mean dose of 24 [16; 32] and 20 [15; 32] mg/day, azathioprine in 50,0 and 46,8% of patients at a mean dose of 150 mg/day or mycophenolate mofetil 2,0 g/day in 30,6% in group 1, hydroxychloroquine 0,2 g/day in 27,8 and 23,4%). Biopsy in group 1 revealed active/borderline (61/39%) myocarditis, in 8 patients — viral genome in the myocardium, including parvovirus B19 in 7 of them. Both groups showed a comparable significant increase in EF after 6 months up to 37,6±8,1 and 42,6±11,5% (p<0,001) and after 27 [12; 54] months up to 43,4±9,6 and 45,5±12,3% (p<0,001), as well as a significant decrease in HF class to 2 [1; 2] in both groups. An increase in EF by ≥10% was recorded in 70 and 72% of patients, respectively. The mortality rate was 13,9 and 12,8%. Taking into account the only transplantation in group 2, the death+transplantation endpoints reached 13,9 and 14,9% of patients (without significant differences between the groups).Conclusion. In patients with severe and moderate myocarditis diagnosed with and without myocardial biopsy, the effectiveness of combined therapy, including IST, was comparable. If it is impossible to perform a biopsy, complex non-invasive strategy makes it possible to diagnose myocarditis with different probability rate and conduct an effective IST, the refusal of which mostly is not justified.
Ultrastructural mitral valve abnormalities in infective endocarditis
Authors: Mukhamadiyarov R. A. , Kutikhin A. G. 
Published: May 2021

Aim. Using an original method based on backscattered scanning electron microscopy, to study the structural features of the mitral valve leaflets in infective endocarditis.Material and methods. We examined 9 mitral valves extracted during surgical interventions due to structural malfunction in patients with infective endocarditis (IE). The samples were fixed in buffered paraformaldehyde with osmium tetraoxide postfixation. After dehydration by increasing alcohol concentration and acetone, the samples were placed in epoxy resin. After the resin has polymerized, the samples were ground and then polished to the desired depth. To increase the electronic contrast, the samples were treated with a uranyl acetate alcohol solution during dehydration and with Reynolds' lead citrate after polishing the epoxy blocks. The samples were visualized by backscattered scanning electron microscopy at an accelerating 15-kV voltage.Results. Structural leaflet injuries caused by IE were most pronounced in the central part and the base. Necrotic areas were extensive electron-dense formations located in the central leaflet layers, or displaced towards the ventricular surface. The electron-dense material in the necrotic area was poorly structured and contained individual cells and bacteria. Bacteria were also present outside the necrotic area. Necrotic areas were surrounded by a layer of a modified extracellular matrix, usually covered with a fibrin layer. Among the extracellular matrix fibers, the macrophages, smooth myocytes and fibroblasts was noted. The fibrin layer, in addition to these cells, contained a large number of blood vessels and was often covered with endothelium.Conclusion. Infection of the mitral valve leaflets causes a simultaneous inflammatory response and regeneration activation. Without adequate regulatory factors, the processes of inflammation and connective tissue creation lead to structural and functional leaflet failure. Specific causes may be overgrowth of necrotic and inflammatory areas, edema and fiber orientation disorder, as well as leaflet rupture.
BILATERAL SUDDEN MIXED HEARING LOSS: CASE STUDY
Authors: Piłka Edyta , Pastucha Małgorzata , Jędrzejczak Wiesław , Orkan-Łęcka Ewa , Włodarczyk Elżbieta , Kochanek Krzysztof 
Published: May 2021

BackgroundThis study presents a case of a patient with sudden hearing loss of a mixed type in both ears.Case reportA 45-year-old man came to our center for consultation because he had had no improvement in hearing after therapy in another clinic. In our clinic the patient was treated for 2 weeks. During each of his visits to our center, a battery of tests assessing the hearing organ were performed: pure-tone audiometry, impedance audiometry, and absorbance measurement. Decisions concerning the treatments to be applied were agreed between both centers managing the patient. In consecutive visits improvement of hearing was observed.ConclusionsAs test results showed, treatments with a wider spectrum of action, such as anti-inflammatory and immunosuppressant drugs, inhalations with an AMSA inhaler, and hyperbaric oxygen therapy restored the patient’s hearing and eliminated the concurrent ailments he reported during the first visit.
Smart IOT Based Healthcare Monitoring and Decision-Making System Using Augmented Data Recognition Algorithm
Authors: Et. al. Annamalai.M, 
Published: May 2021

Many medical errors occur because people are in charge of patients or elderly medications by handling large amounts of medications every day. This work consists of designing and establishing a pillbox prototype intended to address this shortcoming in medical areas. It can be used separately from the medication itself and other advanced features provided with this device by the hospital or retirement home. This medication pack aims to take most medications or vitamin supplements or stimulants that deal with over-salting or over-the-counter patients. The proposed smart pillbox contains a program that enables medical caregivers or clients to determine the pill size and timing of pills and service routine each day. In this research work, the Augmented Data Recognition (ADR) algorithm is also used to monitor humans' health conditions. Initially, the UCI dataset is used for training and validation of the proposed ADR algorithm. The heart rate, blood pressure and temperature of the patient have carried during the testing phase via the Internet of Things (IoT) setup. The testing phase estimates any abnormalities in the health status based on the information obtained by the sensor collected by the population structure. Statistical analysis is based on data obtained from a cumulative cloud from IoT devices to estimate percentage accuracy.
Agonist IVF-ICSI-ET sikluslarında luteal faz desteği için verilen östradiol’ün gebelik oranlarına etkisi
Authors: AKCABAY Çiğdem , ÜRÜNSAK İbrahim , KÜÇÜKGÖZ GÜLEÇ Ümran , CİHAN Esra , SUCU Mete , ATAY Yılmaz 
Published: May 2021

Amaç: Bu çalışmanın amacı agonist in-vitro fertilizasyon (IVF) / intrasitoplazmik sperm enjeksiyonu (ICSI) / embriyo transferi (ET) siklüslerinde, luteal faz desteği için progesterona ek olarak estrojen vermenin gebelik oranları üzerine etkisinin araştırılmasıdır.
Gereç ve Yöntem: Bu çalışmaya toplamda IVF / ICSI endikasyonu olan 142 hasta çalışmaya alındı. Hastalar, oosit toplama işleminden (OPU) sonra luteal destek için progesteron (kontrol grubu n = 71) ve ek olarak transdermal östrojen (çalışma grubu n = 71) verilmek üzere randomize edildi. Östrojen seviyeleri, embriyonun transfer gününde ve transfer sonrası 12. günde ölçüldü. Çalışmanın esas sonucu devam eden gebelik oranıdır. Her iki grup indüksiyon özellikleri, östrojen seviyeleri, β-hCG pozitifliği ve düşük oranları açısından da karşılaştırıldı.
Bulgular: Gruplar arasında yaş, infertilite süresi ve endikasyon açısından istatistiksel olarak anlamlı fark yoktu. Her iki grup indüksiyon özellikleri ve E2 düzeyleri açısından benzerdi. β-hCG pozitiflik oranı benzerdi ve devam eden gebelik oranı her iki grupta benzerdi. Biyokimyasal ve klinik abortus oranları açısından da her iki grup arasında anlamlı fark yoktu. 12. gün östrojen seviyesi gebelik elde edilen hastalarda, elde edilemeyenlere göre anlamlı düzeyde yüksekti.
Sonuç: Çalışmamız; luteal destek amacı ile progesterona ek olarak östrojen eklenmesinin β-hCG pozitifliği, devam eden gebelik ve düşük oranları üzerinde olumlu bir etkisi olmadığını göstermiştir.
Deprem travmasının erken dönem psikolojik etkileri ve olası risk faktörleri
Authors: AKÇA TAŞÇI Gülay , ÖZSOY Filiz 
Published: May 2021

Amaç: Bu çalışmanın amacı; 24.01.2020 tarihinde merkez üssü Elazığ Sivrice ilçesi olan, toplamda 44 kişinin vefat ettiği ve 1500 üzerinde insanın yaralandığı deprem sonrası ortaya çıkan psikiyatrik semptomları ortaya koyabilmektir.
Gereç ve Yöntem: Çalışma depremden 2,5 ay sonra yapılmıştır. Tüm katılımcılara; sosyodemografik veri formu, Beck Anksiyete Ölçeği (BAÖ), Beck Depresyon Ölçeği (BDÖ), Peritravmatik Disosiyasyon Ölçeği (PTDÖ), DSM-5 Travma Sonrası Stres Bozukluğu Kontrol Listesi (TSSBKL) uygulandı.
Bulgular: Çalışmaya 360 kişi; 284 kişi deprem mağduru ve 76 kişi de kontrol grubu olarak alındı. Katılımcıların yaş ortalaması 30.9±9.9 olarak hesaplandı. Deprem mağdurlarından yakınını kaybeden 11 kişi (%3.87) olduğu saptandı. Katılımcıların BAÖ ve BDÖ skorları gruplar arasında farklılık göstermedi. PTDÖ ve TSSBKL için deprem mağdurlarının hesaplanan skorları çok daha yüksekti.
Sonuç: Çalışmamızda deprem sonrası hayatta kalanların depresyon ve ansiyete düzeyleri artmasa da travma ve dissosiyasyon skorlarının artmış olduğu görüldü. Elde ettiğimiz sonuçlara dayanarak; deprem gibi felaketler sonrası hayatta kalanların psikiyatrik ve sosyal olarak iyi desteklenmeleri, hem kayıplarına alışabilmeleri hem de psikiyatrik olarak rahatsızlanmamaları açısından önemlidir.
Effect of Covid-19 pandemic on the progression of bladder cancer patients
Authors: VURUŞKAN Ediz , KARKİN Kadir , ERÇİL Hakan 
Published: May 2021

Purpose: The aim of this study was to discuss the progression results of patients with muscle invasive bladder cancer (MIBC) who delayed their treatment by not making hospital visits on time for fear of contamination during the COVID-19 pandemic.
Materials and Methods: Records of patients diagnosed with MIBC and recommended radical cystectomy (RC) between March 2020 and June 2020 were reviewed. Whether patients were operated on the scheduled time, and if not, the time elapsed after the first diagnosis or the end of neoadjuvant chemotherapy (NAC) were recorded. The patients who applied to our clinic late were restaged and examined whether there was any progression during the pandemic period.
Results: NAC was recommended before RC in 9 of 24 patients, RC was recommended directly to the remaining 15 patients. After NAC, RC was applied to four patients in the planned period, and 4 patients applied delayed. The mean admission period of the patients who applied late after NAC was 197.8±68.5 days. Lung metastases and pelvic lymphadenopathies were found in two (50%). RC was applied to eight of fifteen patients who did not receive NAC in the planned period. Five of these patients applied for RC in the late period and the average application time after diagnosis was 202.8±31.9 days. In the staging of these five patients who presented late, two (40%) had progression (cT2, N0,M1b).
Conclusion: In times of widespread COVID-19 outbreak, physicians should be alert to potential stage progression and worse survival outcomes resulting from delays in diagnosis and treatment.
Visual Scale as a Non-Invasive Method for Evaluation of Risk and Severity of Coronary Atherosclerosis
Authors: Zhatkina M. V. , Gavrilova N. E. , Metelskaya V. A. , Yarovaya E. B. , Rudenko B. A. , Drapkina O. M. 
Published: May 2021

Aim To evaluate quantitative and qualitative characteristics of atherosclerotic plaques (ASP) in carotid arteries (CA) and femoral arteries (FA) and to use these data for developing a visual scale (VS) for noninvasive diagnosis and determination of severity of coronary atherosclerosis.Material and methods This study included 216 patients (115 men and 101 women) aged 24 to 87 years (mean age, 61.5±10.73 years). All patients underwent coronary angiography (CAG) for detecting and determining severity of CA atherosclerosis and duplex scanning (DS) for detecting atherosclerosis of CA and FA.Results Analysis of ultrasound parameters of ASP in CA and FA showed that the maximal ASP height, moderate stenosis and maximal stenosis of the arterial bed had higher predictive values than other ultrasound parameters. These parameters were used for forming diagnostic complexes, on the basis of which two individual VSs for CA and FA were developed. Based on the high prognostic value of both scales, they were combined into one that was named VSCOMB. A ROC analysis determined cut-off points of the VSCOMB for diagnosis of CA atherosclerosis of various severity. VSCOMB scores  >4 indicated pronounced CA atherosclerosis with sensitivity of 86.1 % and specificity of 87.5 % whereas VSCOMB scores  ≤4 excluded it. Thus, VSCOMB score 0–1 indicated the absence of CA atherosclerosis; score 2–4 indicated the presence of subclinical CA atherosclerosis; and score >4 indicated severe CA atherosclerosis.Conclusion A VSCOMB was developed that includes a set of ultrasound parameters for CA and FA and is useful for noninvasive diagnosis of CA atherosclerosis of various severity. Simple and convenient use of VSCOMB allows it to be used at the screening stage to detect subclinical CA atherosclerosis and to prevent its progression.
СОЦИОЛОГИЧЕСКИЙ АНАЛИЗ СОЦИАЛЬНОЙ БЕЗОПАСНОСТИ СОВРЕМЕННОГО КРУПНОГО РОССИЙСКОГО ПРЕДПРИЯТИЯ
Authors: Кареева Анна Петровна 
Published: May 2021

Актуальность исследования определена наличием в современном обществе значительного количества рисков и желанием людей, живущих в нем, обезопасить себя от их негативного воздействия. Социальная жизнь в таком рискогенном обществе характеризуется неопределенностью. Институциональные среды риска охватывают как отдельные социальные группы, так и все человечество. Безопасность при этом выступает сдерживающим элементом, который не дает разрушить сложившуюся социальную структуру данного общества и смягчает возникающие в нем социальные риски. Цель работы: изучить социальную безопасность современного крупного российского предприятия, создать теоретическую модель и провести её практический анализ. Методы исследования: теоретико-методологической основной исследования стали труды ученых, сформировавших основные подходы к пониманию концепции «общества риска», теории институциональных матриц, социальной безопасности, социологии труда и универсумной социологической парадигмы. В рамках исследования проведен социально-исторический анализ открытых документальных источников, контент-анализ печатных средств массовой информации, анкетный опрос и сравнительный анализ представлений руководства и работников отдельных промышленных предприятий атомной отрасли. Результаты: выявлены основные характеристики социального риска, дано его определение, описана социальная сфера современного рискогенного общества. Безопасность при этом рассмотрена как базовый социальный институт такого общества. В нем выделены «внутренняя структура» института и его институциональные формы. Социальная безопасность определена одной из таких форм. Анализ социальной безопасности крупного российского предприятия проведен на различных уровнях социума (макро-, мезо- и микроуровень), создана теоретическая модель. Практический анализ теоретической модели социальной безопасности проведен на отдельных промышленных предприятиях атомной отрасли. Такими предприятиями стали ГХК (г. Железногорск, Красноярский край), СХК (г. Северск, Томская область), ПО «Маяк» (г. Озерск, Челябинская область) и Атомфлот (г. Мурманск, Мурманская область).
Gas Emissions from Mixed Coal-Biomass Derived Fuel Burned in an Industrial Boilers
Authors: Nurhayati Annita 
Published: May 2021

Textille industry consumes huge amount of coal to operate their boiler. At the same time, the company generated huge amount of bottom ash from the boiler operation and it is considered as hazardous waste. PT. X has been attempting to reuse bottom ash mixed with solid waste compost to generate biofuel named as biomass coal fuel (BCF) briquettes as co-fuel for boiler combustion. This study conducted two boiler combustion experiments: i) co-firing boiler operation with 90% coal and 10% of BCF, and ii) 100% of coal. The SO2 and NO2 emissions were measured from the two experiments. The emission test was carried out using the MRU Optima 7 which is equipped by an electrochemical sensor, combined with an extraction probe to be inserted into the stack. From the emission test results, the SO­2 concentration of 100% of coal burning was 150 mg/Nm3. SO2 concentration of coal fuel with a substitution of 10% BCF was 498.8 mg/Nm3. The NO2 concentration from 100% coal combustion was 174.2 mg/Nm3 while from mixed fuel combustion was 370.3 mg/Nm3. Using BCF as an aggregate for coal combustion did not bring in lower emissions of SO2 and NO2. Emission factor for SO2 from 100% coal combustion is 6.295 g/kg while for coal fuel with a substitution of 10% BCF is 31.09 g/kg. NO2 emission factor from 100%, coal burning is 7.31 g/kg while the emission factor of NO2 in coal fuel with a substitution of 10% BCF is 23.31 g/kg.