bluuebunny/crossref_metadata_2025 huggingface dataset:
دراسة تأثير مثبط نتريت الصوديوم على معدل التآكل للصلب الكربوني في محلول كلوريد الصوديوم
Authors: ابوفلغة علي , قراب سالم , بلعم محمد , الزدام ابتسام
Published: September 2024

يعتبر مثبط نتريت الصوديوم من أشهر المثبطات الكيميائية لوفرته ورخص ثمنه واستخدامه في كثير من الأوساط الآكلة. تتضمن هذه الورقة دراسة تأثير مثبط نتريت الصوديوم بتراكيز (300ppm، 500ppm، 700ppm) على تآكل الصلب الكربوني في وسط راكد من محلول كلوريد الصوديوم بتراكيز (1%، 2%، 3%،4%) وآخر متحرك بسرعات (0، 60، 100 دورة في الدقيقة) من نفس المحلول. أظهرت النتائج أن إضافة مثبط نتريت الصوديوم أدت إلى تناقص معدل تآكل الصلب الكربوني في جميع الحالات دون استثناء، وأن زيادة كمية المثبط لا تؤدي بالضرورة إلى نقص معدل التآكل؛ فعلى سبيل المثال معدل التآكل بإضافة 500ppm أعلى منه بإضافة 300ppm من المثبط (عند تركيز 4% للمحلول). بينت الدراسة أيضاً الكفاءة العالية لمثبط نتريت الصوديوم والتي لا تقل عن 90% في الوسط المتحرك، وتتعدى 97% في الوسط الراكد عند أي تركيز للمثبط والمحلول.
Nitrogen and Sulfur Oxides Emissions from Fuel Oil Combustion in Industrial Steel Reheat Furnace
Authors: Abuluwefa Hussein , Alnaas Adel
Published: September 2024

Many industrial heating operations still use fueloil for combustion instead of the cleaner gaseous fuels. Inthe steel industry, large furnaces referred to as reheat furnaces are used to heat steel stocks to rolling temperaturesusing normally fuel oil for combustion. The combustionproducts of flue gases consist of mainly carbon dioxide,water vapor and traced of other oxides such as nitrogen andsulfur oxides. These oxides are of a concern to theenvironment and should be minimized as much as possible.Experiments were carried out on a steel billet reheatfurnace in which air/fuel ratios are varied while the nitrogenoxide content is being monitored using furnace instruments.These variations in air/fuel ratios for combustion are foundto affect the concentration of nitrogen oxides in the flue gaswhere higher air/fuel ratios promoted the formation ofhigher nitrogen oxides during combustion. The sulfurdioxide content in the flue gas was calculated based onactual measurements of air and fuel rates to the furnace andfound to be minimal in the flue gas.
Pedestrian Gap Acceptance and Crossing Decision outside Crossing Facilities along Urban Streets in Malaysia: A Case Study of Rughaya Street, Batu Pahat, Johor, Malaysia
Authors: alajnaf Issam , Emhamed Khaled , Almadani Moftah
Published: September 2024

Walking considered as one of the safest modes oftravel available, sustainable to human society as well asenvironmentally beneficial. In this context, the aim of thisresearch is to investigate pedestrians’ traffic gap acceptanceand crossing decision for Mid-block Street crossing in urbanareas in Malaysia. Pedestrian crossing behaviour atRughaya Street has been examined in terms of the decisionto cross or not the street and size of traffic gaps accepted bypedestrian, as well as the related contributing factors. Afield study was conducted to collect the data of pedestrians’decisions under real mix traffic Condition using videocamera on a typical unsignalized urban street section. JPEGfiles were obtained from video recording by using SnapshotWizard software. The data extracted included trafficcharacteristics such as traffic size, traffic speed, etc.pedestrian individual characteristics such as gender, inaddition to individual behavior such as waiting, frequencyof attempt, etc.). Furthermore, The extracted data wereused to develop and examine a pedestrian gap acceptancemodel based on A lognormal regression model and binarylogistic model by SPSS (22) in order to validate the impactof various parameters on the size of traffic gaps accepted bypedestrians as well as the effect on the decision of pedestrians to cross the street or not.
Fixed Output Voltage for Solar Cells Based on Buck Converter
Authors: Bakir Ahmed , Baaiu Ahmed
Published: September 2024

In order to overcome the shortcomings such asextended time and high cost of using solar cells toexperiment, this paper successfully used a DC power supplyand a variable resistor to simulate the solar cells outputcharacteristic curves. Operating principles, equivalentcircuits, and illustrative example in terms of computersimulation are presented in order to validate the approach.This paper deals the design of DC/DC converter which canmake voltage maintained at a specified value. MATLABsimulation for Open--loop and Closed--loop controlled Buckconverter for the solar cells is discussed and the results arepresented.
Effects of Using Different Valves Types on Water Hammer Transients
Authors: S. Elgassier
Published: September 2024

Abstract — In general the severity of transient associatedwith water hammer depends upon the rate of change of theflow conditions, for example the rate of valve closure oropening determines for any pipeline the magnitude of theresulting transient. A well understood analysis of transientpropagation may allow potentially suppression transients.However, this is not always possible for the range of reasonsand in this case it may be necessary to incorporate surgecontrol or suppression devices. In this paper, detailed studyof three different valve types of commonly used are includedto determine the best functional valve. In this computationalinvestigation, method of characteristics has beenimplemented with appropriate B.C. to study the effect ofusing different valves. The three different valve types havebeen investigated subjected to a different closing time. It hasbeen found that the globe valve is the proper valve to beused at slow closure process while butterfly valve is better infast closure process in the view of minimizing the waterhammer peak pressure.
The Role of Intangible Features in Developing Open Spaces
Authors: Ibrahim Abaid  , Ibrahim Shinbira
Published: September 2024

this paper focuses on the role of intangibleelements of the public spaces in the residential areas such asa neighbourhood. The main emphasis is the significance ofthe factor of social satisfactions on developing public spaces.The research to date has tended to focus on examining thephysical quality of public space, particularly tangiblefeatures, but fewer have dealt with the intangible featuresthat related to the residents’ social life and communityinteraction. Consequently, in this research, the analysisincludes some important intangible elements such as a senseof community, social satisfaction and safety and security inthe public spaces and the local initiatives. The researchincludes two case studies in Misurata, Libya. Both cases areneighbourhoods type with similar in size, population,number of houses and distance from the city centre.However, one case is a Governmental Neighbourhood GNswhile the other one is a Traditional Neighbourhood TNs.This inquiry is a qualitative research, however, it adoptedmixed methods approach, and i.e. both questionnaires andin-depth interviews were utilized for data collection. Theresults of this study show that there are a several crucialfindings related to the importance of these intangibleelements, these findings suggest some practical guidelines tobe considered in new development projects.
Investigation into the Decision Making Processes within Some Operating Oil & Gas Companies
Authors: Aburas Hanan , Hokoma Rajab
Published: September 2024

Making decisions is considered as the key role inachieving the desired goals within any organization. Moreover, making decisions in oil & gas industry is becoming a key factorfor improving the work performance throughout practicing themost effective tools and techniques. The main purpose of thispaper is to identify how individuals making their decisionswithin operating oil and gas companies.The required data for this paper were acquired byconducting several interviews with decision makers, and aquestionnaire survey was also developed, besides reviewing therelated literatures. Decision making processes in Libyan oil &gas operating companies were being investigated. The mainfindings show that over half of participants always considersafety, security and uncertainty issues when making theirdecisions, meaning that, it is a good indication of takingprecautions when making decisions. Additionally, the majorityof participants always double check their informationresources, which is also a good indication of increasing thequality decisions and enhancing the work performance. Basedon the findings, a number of recommendations were proposedfor improving the processes of making proper and effectivedecisions within this business area
Improvement of Subgrade Soils by Using Marble Dust-(Libya, Case Study)
Authors: Eltwati Ahmed , Saleh Fares
Published: September 2024

the practice of using waste materials to modify theproperties of poor soils has become increasingly important ingeotechnical engineering. In recent years, much research hasbeen devoted to the effect of this waste material on soilproperties. This study aims to address the influence of marbledust powder on the performance of subgrade. Thus, soilsmixed with different percentages of marble dust were tested.The CBR test and modified proctor have been used toevaluate the performance of the soils mixed with marble dust.The statistical analysis illustrated that marble dustsignificantly enhanced the properties of the soils. The studyconcludes that an addition of 10% of marble dust to untreated(control) soils yields the most satisfactory results among otherpercentages of marble dust. The study recommends the use ofmarble dust in geotechnical construction.
Integrated of Seismic Refraction Tomography (SRT), and Multichannel Analysis of Surface Waves (MASW) for Verifying and Mapping a postulated Fault
Authors: Eljabri Dr. Faraj , Anderson Dr Nail
Published: September 2024

The location of the study site for the presented paper here is at Arkansas in the United States of America. Geophysical investigations using seismic refraction tomography (SRT) and multichannel analysis of surface waves (MASW) surveys have been jointly carried out on the basis of an experimental investigation in the field. The motive of this study is to validate and map a postulated fault, in the eastern part of Arkansas in the United State of America. The SRT techniques have shown their potentiality in successfully identifying the fault and generated remarkably similar images of the fault, while the MASW tool generated a slightly different image of the fault due to condition that the earth under survey made up of layers of material that increase in seismic velocity which consider the perfect case for SRT techniques. The results show that the integrated use of seismic refraction tomography and multichannel analysis of surface waves is an effective tool with great potential. They provide very useful data for shallow mapping applications.
Compressive and Split Tensile Strengths of Steel Fiber Reinforced Concrete Exposed to Temperature
Authors: Abdalkader Ashraf , Al-Sahli Sofyan , Al-Barrany Ahmed
Published: September 2024

Compressive and split tensile strengths of steel fiber reinforced concrete (SFRC) subjected to temperature (20, 100, 200, 400 and 600 oC) were experimentally investigated in this study. Four different volume percentages (0, 0.25, 0.5 and 0.75% by volume of concrete) of steel fibers were used. Concrete specimens were cured in water for 28 days and then allowed to dry for three days at laboratory temperature before subjected to heat for 2 hours in an electric furnace. After the completion of heating period, specimens were cooled down for 1 day at laboratory conditions and then tested for determining their compressive and split tensile strengths as well as ultrasonic pulse velocity (UPV). The relation between concrete strengths and temperature for steel fiber reinforced concrete (SFRC) were also discussed. The test results show that the compressive and split tensile strengths of steel fiber reinforced concrete are less affected by temperature as compared to those of control concrete (without fiber). The results of statistical analysis show a good linear relation between: 1) Compressive strength and temperature; 2) Split tensile strength and temperature for SFRC.
تقدير الحالات و المعاملات الفيزيائية لنظام ديناميكيات الكاحل البشري
Authors: السويحلي أسماء , الصغير د.عزالدين
Published: September 2024

تتناول هذه الورقة التقدير المثالي لحالات و معاملات  نظام ديناميكيات الكاحل البشري، حيث تم العمل على النموذج الرياضي لهذا النظام من بعد تحويره و تمثيله بنموذج فضاء الحالة و أخيرا تم استخدام طريقتي التعريف التاليتين للتقديرالمثالي لكل حالات ومعاملات النظام والمقارنة بين نتائجهما. الطريقة الأولى هي مرشح كالمان الممدد (Extended  Kalman Filter) وفيها استخدم مرشح كالمان لتقدير حالات و معاملات النظام في نفس الوقت حيث تم تمديد حالات النظام الى معاملاته و من تم تقديرها كثوابث، و لان بعد التمديد يصبح النظام غير خطي و قابلية المراقبة  غير متاحة لهذا توجب تقريب نموذج المراقب الى نظام خطي حول نقاط تشغيل حالات و معاملات النظام المراد مراقبتها. الطريقة الثانية هي طريقة خطأ التنبؤ التكراري (Recursive - Prediction Error ) و فيها تم استخدام مرشح كالمان كمراقب لحالات النظام بينما معاملات النظام تم تقديرها بأستخدام خوارزميات (جاوس- نيوتن) و من ثم ارسالها الى المراقب (مرشح كالمان) و هو بدوره يقدر حالات النظام و يرسلها في نفس الوقت الى خوارزميات (جاوس- نيوتن) و تستمر هذه العملية الى أن يصل مجموع مربع خطأ التقدير الى الحد الأدنى.
An Experimental Investigation Of Perforated Manifolds To Enhance Stratification In A Solar Domestic Hot Water Tank
Authors: Alsagheer Fozi , Allen Peter , Ugursal V. Ismet
Published: September 2024

An experimental study was conducted to develop and test three perforated manifolds designed to enhance thermal stratification in a solar domestic hot water tank. The perforated manifolds extend from an immersion heat exchanger to the top of the tank. Experimental results were analyzed for each manifold to determine the most effective design. The thermal performance of the manifolds was evaluated in terms of the exergy and entropy of the water in the tank at the end of each test. It was found that perforated manifolds perform better than a conventional non-perforated manifold that delivers hot water to the top of the tank. Further work, especially using CFD tools, will help in identifying favorable perforated manifold designs.Solar domestic hot water tank
Using Memristor Element to Improve the Reliability of Digital Circuits
Authors: Abufalgha Mohamed
Published: September 2024

Memristor has been used as a filter stage to improve The reliability of digital circuits has been improved by using memristor. This element works as a filter stage to waive most of the glitches generated in prior stages. The proposed technique is applied to three different circuits to improve their reliability. Those circuits are: a chain of inverters represents a long path topology, c432 benchmark represents a short path circuit, c1908 benchmark represents a long path circuit. The memristor stage is connected between the last two stages of each output path of the circuit. The memristance of the memristor is changed using a certain parameter (x0), higher memristance means longer propagation delay and more glitches are attenuated. The experiment is run at different values of the memristance and the error probability is calculated at each value. The effect of this stage is studied by calculating the energy consumption and performance of the circuits with and without this stage. The Reliability-Energy-Performance trade-off relationship is found and introduced for each circuit, the results show that the reliability of the circuit is improved to the highest levels, when
Design of Lead, Lag and Lead-Lag Compensators Based on Frequency Response Approach
Authors: Jalgham Fatma , Zaggout Mahmoud , Larbah E. Larbah
Published: September 2024

In the control systems, the compensators are widelyused to improve system dynamics, characteristics of the openloop system and the stability. The degree of convergence of theoutput waveform for any compensator depends upon theproper selection and tuning of the compensator. The dynamicstructure and the control properties of lead, lag and lead-lagcompensators are presented in this work. A simple methodbased on the frequency domain is adopted to design the threedifferent compensators. The parameters which have effect oneach compensator performance were studied and explainedhow to choose them to achieve the optimal performance. Thecompensator algorithms are implemented with MATLABsimulation in order to control the DC motor motion. The resultsand the comparative analysis confirm the effectiveness of theproposed three compensators and improve the systemresponse.
Influence of Tefla Content as Partial Replacement of Fine Aggregate on Performance of Concrete
Authors: Alhireer Abraheem , Ben Omran Hamza , Elmbareky Mohammed
Published: September 2024

Concrete is the most widely used material, Natural aggregate consists of up to 80% of the volume of concrete. Given the increasing depletion of natural aggregate, Fine aggregate is a prime material used for preparation of concrete and which plays a major role in mix design. Tefla is considered alternative material satisfy properties of fine aggregate and available easily, domestically with a great amount in OmAlrozam, a town near the city of Derna, Libya. The tefla were ground to roughly fine aggregate fineness, sieve analysis in ASTM C33 requirement of fine aggregate and tefla. physical tests were conducted and chemical composition of the tefla material was determined using X-Ray Fluorescence (XRF). This study aimed to investigate the suitability of tefla, I think is missing partial fine aggregate replacement on performance of concrete, the yellow tefla utilized in its dry condition (without pre-wetting). Four replacement levels, 2.5%, 5%, 7.5%, and 10%, were compared with the control specimen of w/c ratio 0.50. The mechanical and physical properties tests were performed after 7 and 28 days of curing in water. Results showed that concrete containing tefla as partial replacement of fine aggregate compare favourably well with the control specimen. Consequently, it is suggested that tefla can be used as replacement of fine aggregate in the production of concrete.
دراسة وتحليل بعض المتغيرات على أداء مقطر شمسي مزدوج معمليًا
Authors: المطردي علي , الطويل علي , الفقي منار
Published: September 2024

يهدف هذا البحث إلى تصميم ودراسة أداء المقطر الشمسي المزدوج عملياً، حسب الظروف الجوية لمدينة مصراته، حيث يتكون المقطر المقترح من حوض مساحته 1 متر مربع من الخشب وارتفاعه 10 سم به فتحات دخول وخروج الماء, وتم عزل جوانب حوض المقطر بمادة عازلة من الفوم ويطلى الحوض بطلاء اسود من مادة السيلكون ويغطى الحوض بغطاء زجاجي بسمك 3 ملى يميل بزاوية خط العرض لمدينة مصراته وهو موقع البحث لغرض الحصول على أكبر قيمة للإشعاع الشمسي الساقط على الغطاء الزجاجي، وقناتين تكثيف لتجميع المياه المقطرة . تم البحث في بعض الأيام التي تكون فيها السماء صافية، وذلك بوضع كمية من مياه البحر على أعماق مختلفة في حوض المقطر وتؤخذ القراءات كل ساعه. المتغيرات هي درجة حرارة الجو ودرجة حرارة الماء داخل المقطر ودرجة حرارة زجاج المقطر وقياس الإشعاع الشمسي وسرعة الرياح وكذلك كمية المياه المقطرة الناتجة لكل ساعة.
    إضافة إلى ذلك تم تحليل عينات المياه قبل وبعد عملية التقطير في مركز البحوث والاستشارات جامعة مصراته حيث تم فيه قياس الأس الهيدروجين (HP) والموصلية الكهربائية (C.E) ومجمل المواد الصلبة (S.D.T) لمعرفة هذه الخصائص قبل وبعد عملية التقطير .
    من خلال النتائج المتحصل عليها اتضح أن إنتاجية المقطر تزداد كلما ازدادت شدة الإشعاع الشمسي الساقط على الغطاء الزجاجي، وكذلك كلما انخفضت نسبه ملوحة الماء. كما أوضحت النتائج إمكانية الحصول على كمية من الماء المقطر في حدود 2.4 لتر خلال 10 ساعات من بداية تشغيل المقطر عندما يكون عمق ماء البحر في الحوض 1.5 سم أما عندما يكون عمق ماء البحر في المقطر 1 سم نتحصل على 1.4 لتر من المياه المقطرة و1.9 لتر عندما يكون عمق ماء البحر 0.5 سم .
صب الخرسانة تحت الماء باستخدام تقنية الخرسانة ذات المرحلتين
Authors: الشعاب نورالهدي , إشطيبة خولة , الباشا نوري
Published: September 2024

يعتبر صب الخرسانة تحت الماء أمرًا ضروريًا في تنفيذ معظم الهياكل الداخلية والخارجية،  ويعتبر تحديًا كبيرا للمهندسين، أثناء مرحلة التصميم أو التنفيذ والإشراف. هذا يرجع إلى أنه يجب اتخاذ العديد من الاحتياطات لنجاح عملية الصب، أهم الاحتياطات هو حماية الخرسانة الطازجة أثناء عملية الصب في الماء لتجنب مخاطر انجراف الإسمنت، هناك تقنيات جديدة للخرسانة تحت الماء مثل الركام المحقون والذي يعرف باسم طريقة الخرسانة ذات المرحلتين  Two-Stage Concrete.
والهدف الرئيسي من الدراسة هو تقديم إمكانية صب الخرسانة تحت الماء باستخدام طريقة الخرسانة ذات المرحلتين (TSC)، حيث تم استخدام نوع من الاضافة (  Sika ViscoCrete-5930 ) و تعمل كمادة  تمنع  اختلاط الاسمنت بالماء ودراسة الخواص الميكانيكية للخلطات المنفذة وذلك باجراء اختبار الموجات فوق الصوتية واختبار مقاومة الضغط واختبار مقاومة الشد غير المباشر.
حيث تم إعداد ثلاث خلطات، الخلطة الأولي(R ): احتوت على خلطة مونة اسمنتية عادية بنسبة (W/C=0.45%) ،الخلطة الثانية (SV-0.8): احتوت على خلطة مونة اسمنتية بإضافة Sika ViscoCrete-5930 بنسبة (0.8%) من وزن الاسمنت، الخلطة الثالثة SV-2): احتوت على خلطة مونة اسمنتية بإضافة Sika ViscoCrete-5930 بنسبة (%2) من وزن الاسمنت، ، تم صب جميع الخلطات في قالب بأبعاد 600×300، تم استخراج العينات الأساسية وفحصها بصريًا وإجراء اختبار الضغط واختبار الشد غير المباشر واستخدام اختبار سرعة النبض بالموجات فوق الصوتية،
من النتائج التي تم الحصول عليها، لوحظ أنه من الممكن صب الخرسانة تحت الماء باستخدام الخرسانة ذات المرحلتين بطريقة ناجحة.
The role of non-fermenting gram-negative bacteria Stenotrophomonas maltophilia in the etiology of infectious diseases (review)
Authors: Golubeva A. O. , Bondarenko A. P. , Trotsenko O. E. , Ogienko O. N.
Published: September 2024

Gram-negative bacteria Stenotrophomonas maltophilia rank third among non-fermenting gram-negative bacteria in terms of detection frequency in various infectious pathologies. This review presents information on the various virulence factors, mechanisms used by S. maltophilia for colonization and infection of the human body, multiple drug resistance, clinical manifestations of the diseases caused, and methods of bacteriological diagnosis. The importance of early identification of this pathogen for practicing physicians is emphasized. The selection of treatment for infections caused by S. maltophilia is discussed, highlighting the challenges faced by both clinicians and microbiologists. To this end, current domestic and international scientific publications were reviewed using scientific electronic library search engines such as PubMed, Google Scholar, eLIBRARY.ru, and CyberLeninka.
Peculiarities of granulocyte-macrophage and macrophage colony-stimulating factors receptors expression in subpopulations of peripheral blood monocytes of patients with chronic obstructive pulmonary disease
Authors: Gassan D. A. , Naumov D. E. , Sugaylo I. Yu. , Kotova O. O. , Gorchakova Y. G. , Afanas’eva E. Yu.
Published: September 2024

Introduction. To analyze of the severity of respiratory symptoms in patients with chronic obstructive pulmonary disease (COPD), depending on the presence of an exacerbation or novel coronavirus infection (NCVI), taking into account the activity of acute phase blood parameters.Materials and methods. The medical documentation of 162 patients with COPD was studied, which were divided into 3 groups: group 1 (n=61) ‒ COPD and NCVI, group 2 (n=53) – stable COPD, group 3 (n=48) ‒ COPD exacerbation. The severity of respiratory symptoms was assessed using points. To assess the activity of inflammation the following biochemical indicators were used ‒ C-reactive protein (CRP) and fibrinogen (g/L).Results. According to the severity of cough and the intensity of dyspnea on the mMRC scale, the first, second and third groups did not differ statistically (p=0.07). Patients of the first group (82.5%) characterized by the absence of classical criteria for exacerbation of COPD. In terms of the severity of sputum production, the first, second and third groups are statistically different (p=0.0001). The first, second and third groups differ significantly in the level of serum CRP (p=0.0001) and fibrinogen (p=0.009). According to the results of the correlation analysis, some relationships found between respiratory symptoms and the level of CRP and fibrinogen.Conclusion. The clinical feature of the associated course of stable COPD and NCVI is the presence of severe dyspnea and the absence of classic criteria for exacerbation of COPD. Systemic inflammation in NCVI and stable COPD are more pronounced than in isolated stable COPD or exacerbation and correlates with cough and dyspnea. Practitioners for the differential diagnosis of NCVI in stable COPD can use the data obtained.
Lung function in patients with asthma in the post-COVID period
Authors: Mineeva E. E. , Antonyuk M. V. , Yurenko A. V.
Published: September 2024

Aim. To assess the lung function in patients with bronchial asthma (BA) after new-onset coronavirus infection.Materials and methods. Fifty-five patients who underwent COVID-19 participated in the study under conditions of voluntary informed consent. The main group consisted of 30 patients with mild BA, the comparison group – 25 patients without chronic respiratory diseases (CRD). According to chest computed tomography (CT) findings, the degree of lung parenchyma involvement was classified as follows: mild COVID-19 (CT 0 stage) in 14 patients; moderate COVID-19 (CT 1-2 stages) in 27 patients; and severe COVID-19 (CT 3-4 stages) in 14 patients. Lung function tests were conducted once, adhering to both Russian and international standards.Results. In patients with BA, obstructive pulmonary function impairment was predominant at CT 1-2 stages (79%), CT 0 stage (67%), and CT 3-4 stages (43%). Lung diffusion capacity (LDC) was impaired predominantly in CT 3-4 stages in both BA patients and those without CRD, occurring in 57% of cases. Analysis of lung function showed that LDC reduction was detected in 17% of BA cases and 24% of non-CRD cases. There were no statistically significant changes in pulmonary ventilation among BA patients with impaired LDC compared to patients without CRD.Conclusion. All patients with respiratory symptoms after COVID-19 should undergo comprehensive lung function assessment to identify bronchial obstruction, impaired lung diffusion capacity, and ensure timely intervention.
Multivariate regression analysis of risk factors for the development of polyposisrhinosinusitis
Authors: Ivanov M. O. , Egorova E. V. , Fefelova E. V. , Tsybikov N. N.
Published: September 2024

Introduction. Chronic rhinosinusitis with nasal polyps is a group of chronic recurrent inflammatory diseases of the nasal mucosa and paranasal sinuses with an incompletely understood etiopathogenesis. Despite various theories on the development of this disease and principles of pathogenetic therapy, some patients continue to suffer from the disease, which is resistant to both medical and surgical treatment.The aim of this study was to identify the most significant risk factors for the development of polypoid rhinosinusitis in patients with chronic purulent rhinosinusitis using binary logistic regression.Materials and methods. The study included patients diagnosed with chronic purulent rhinosinusitis (n=40) and chronic purulent-polypoid rhinosinusitis (n=40) who were treated at the otorhinolaryngology department of the Chita Clinical Hospital "RZD-Medicine" from 2016 to 2020. The control group consisted of 20 healthy volunteers, matched by sex and age with the study groups. All subjects underwent comprehensive clinical examinations, bacteriological analysis, endoscopic examination, and measurements of interleukin (IL)-1β, IL-2, IL-4, IL-6, IL-8, IL-10, defensins (HAD 1-3), heat shock protein 70 (HSP70), and autoantibodies to it in serum and nasal secretions, as well as the coagulation activity of nasal secretions. Binary logistic regression was used to analyze risk factors for the development of polypoid rhinosinusitis.Results. We demonstrated that high predictive significance for the development of nasal mucosal polyps in patients with purulent rhinosinusitis is associated with concentrations of heat shock protein 70, IL-10, and HAD 1-3 in serum.Conclusion. A test set that includes levels of HSP70, IL-10, and HAD 1-3 in serum can predict the development of chronic polypoid rhinosinusitis with 99% accuracy.
Leveraging Oracle HCM for Enhanced Employee Engagement
Authors: Md Abul Khair  , Venkata Ramanaiah Chintha  , Vishesh Narendra Pamadi  , Shubham Jain  , Shalu Jain
Published: September 2024

As the current corporate environment continues to evolve, employee engagement has emerged as a critical component in determining the success of an organisation. Oracle Human Capital Management (HCM) systems provide a revolutionary chance to improve employee engagement by providing a full suite of tools that are geared to handle different areas of workforce management. This opportunity presents itself as a result of the availability of these systems. In order to provide a more unified and responsive approach to employee engagement, Oracle Human Capital Management (HCM) offers an integrated platform that incorporates basic HR tasks, talent management, workforce management, and analytics.
In this article, we investigate how the capabilities of Oracle Human Capital Management (HCM) may be strategically used to cultivate a staff that is more engaged and motivated. The cloud-based design of the system guarantees accessibility and real-time data processing, both of which are crucial for interactions with workers that are timely and relevant. A variety of features that may be adapted to assist engagement activities are provided by the modules that make up Oracle Human Capital Management (HCM). These modules include Employee Central, Talent Management, and Learning Management. For example, the Talent Management module helps to connect employee goals with organisational objectives, which in turn improves both work happiness and performance. While this is going on, the Learning Management module offers individualised training and development possibilities, according to the workers' requirements for professional advancement and their goals for their careers.
Multi-Sensor Biomarker Using Accelerometer and ECG Data
Authors: Nishit Agarwal  , Raja Kumar Kolli  , Shanmukha Eeti  , Prof.(Dr.) Arpit Jain  , Prof.(Dr) Punit Goel
Published: September 2024

The development of multi-sensor biomarkers offers a promising avenue for enhancing personalized healthcare and remote monitoring. This study focuses on the integration of accelerometer and electrocardiogram (ECG) data to create a comprehensive multi-sensor biomarker capable of assessing both physical activity and cardiovascular health. Accelerometers track movement patterns, activity levels, and postures, while ECG sensors monitor heart rate, heart rate variability (HRV), and overall cardiac function. By combining these data streams, it is possible to correlate physical exertion with heart performance, resulting in a more holistic health assessment.
This research employs advanced machine learning algorithms to analyze synchronized accelerometer and ECG data, identifying patterns that reflect an individual's physiological state. The primary goal is to develop a reliable, real-time biomarker that can detect early signs of disease, monitor chronic conditions, and support preventive health measures. This multi-sensor approach aims to improve accuracy in health assessments by providing deeper insights into the relationship between physical activity and cardiovascular function.
Innovative strategies for sustainable development of enterprises in a changing market
Authors:   TAS ESSET Management, Khakhaliev Dmytro , Miniailo Nataliia ,   Simon Kuznets Kharkiv National University of Economics
Published: September 2024

The article analyzes various approaches to innovation development for enterprises operating in volatile markets. It explores critical innovation strategies, including proactive, reactive, imitative, niche, mergers and acquisitions (M&A), open innovation, incremental, and radical strategies. The proposed utilization of these strategies aims to ensure sustainable development for enterprises, considering their specific activities and market conditions. Proactive Strategies are characterized by their focus on anticipating and shaping market trends—proactive strategies position companies as market leaders by developing new products and services ahead of market demand. Analyzing technological trends and innovations is highlighted, enabling enterprises to maintain a competitive edge by staying ahead of competitors. Reactive strategies, however, adapt to changes in market and consumer demand. This approach involves responding swiftly to market shifts and competitive innovations. Imitative Strategies involve replicating or adapting innovations introduced by other companies. Niche Strategies concentrate on serving narrow market segments or specific technological niches. Companies utilizing niche strategies aim to become specialists in their chosen fields, offering unique solutions tailored to specific customer needs. This approach requires deep understanding, specialization, and expertise, allowing enterprises to command premium prices due to the distinctiveness of their products or services. This approach accelerates innovation processes by integrating external capabilities while reducing competitive pressures. However, successful implementation of M&A strategies demands meticulous planning and effective management to achieve synergy between organizations. In conclusion, the article offers a comprehensive framework for selecting and implementing innovative strategies tailored to enterprises’ specific needs and conditions in dynamic market environments. By strategically applying these approaches, enterprises can enhance their innovation capabilities, adapt to market changes effectively, and achieve sustainable development in the long term. Keywords: innovation strategies, sustainable development, dynamic market, proactive strategies, reactive strategies, imitative strategies, niche strategies, mergers and acquisitions, open innovation, incremental strategies, radical strategies, university partnerships, R&D, competitive advantage, market stability.
A Study of $\phi$-Pluriharmonicity in Quasi bi-slant Conformal $\xi^\perp$-Submersions From Kenmotsu Manifold
Authors: Al-dayel Ibrahim , Shuaib Mohammad , Fatima Tanveer , Sikander Fahad
Published: September 2024

In the present research paper, we look into quasi bi-slant conformal $\xi^{\perp}$-submersions from Kenmotsu manifolds onto Riemannian manifolds as a generalisation of quasi hemi-slant conformal submersions. We investigate the geometry of distributions's leaves in order to explain integrability conditions for distributions. Furthermore, we study of certain decomposition theorems, additionaly provide non-trivial examples of quasi bi-slant conformal $\xi^{\perp}$-submersions from Kenmotsu manifolds. We also look at the $\phi$-pluriharmonicity of quasi bi-slant conformal $\xi^{\perp}$-submersions.
Classification of Vector Fields and Soliton Structures on a Tangent Bundle with a Ricci Quarter-Symmetric Metric Connection
Authors: Gezer Aydın , Karakaş Erkan
Published: September 2024

Consider $TM$ as the tangent bundle of a (pseudo-)Riemannian manifold $M$, equipped with a Ricci quarter-symmetric metric connection $\overline{\nabla }$. This research article aims to accomplish two primary objectives. Firstly, the paper undertakes the classification of specific types of vector fields, including incompressible vector fields, harmonic vector fields, concurrent vector fields, conformal vector fields, projective vector fields, and $% \widetilde{\varphi }(Ric)$ vector fields, within the framework of $\overline{% \nabla }$ on $T\dot{M}$. Secondly, the paper establishes the necessary and sufficient conditions for the tangent bundle $TM$ to become as a Riemannian soliton and a generalized Ricci-Yamabe soliton with regard to the connection $\overline{\nabla }$.
Generalized Ricci-Recurrent Weyl Manifolds
Authors: Hafızoğlu Gökdağ Zehra , Arsan Güler
Published: September 2024

This present paper is concerned with the study of the generalized Ricci-recurrent Weyl manifolds. First, we obtain a sufficient condition for the generalized Ricci-recurrent Weyl manifold admitting harmonic conformal curvature tensor to be a quasi-Einstein Weyl manifold. Also, we give an example of a quasi-Einstein Weyl manifold. Then, we prove that a generalized Ricci-recurrent Weyl manifold satisfying the Codazzi type of Ricci tensor is an Einstein Weyl manifold if and only if its scalar curvature is a prolonged covariant constant. Moreover, we prove that a generalized Ricci-recurrent Weyl manifold with a generalized concircularly symmetric tensor is an Einstein-Weyl manifold whose scalar curvature is prolonged covariant constant.
Cuyahoga Valley National Park: Paleontological resource inventory (sensitive version)
Authors: Shaffer Austin , Hodnett John-Paul , Santucci Vincent , Tweet Justin , Hodnett John-Paul , Santucci Vincent , Shaffer Austin , Tweet Justin
Published: September 2024

Cuyahoga Valley National Park (CUVA) was established as Cuyahoga River National Recreation Area on December 27, 1974, to preserve and protect the Cuyahoga River Valley and its historic, scenic, natural, and recreational values. While not explicitly mentioned in the park?s mission statement, paleontological resources preserved at CUVA are nevertheless of importance, particularly when considering the significant fossil discoveries made elsewhere across northeast Ohio.
The upper Paleozoic geologic strata of CUVA encompass sedimentary rocks dating from the Late Devonian to the Early Pennsylvanian, recording a series of shallow marine and coastal riverine environments. Within these rocks, a diverse assortment of fossil organisms is preserved at the park, including corals, bryozoans, brachiopods, bivalves, cephalopods, gastropods, arthropods, crinoids, early land plants, fish, and more.
To comprehensively assess the paleontological resources at CUVA, a field inventory was conducted from April to June 2024. Fifteen notable paleontological localities were documented in the park during this inventory, with several potentially significant new fossil discoveries made as well, such as rare Early Mississippian tetrapodomorph material. A review of published and gray literature supplemented the 2024 fieldwork. Between the fossil discoveries of the 2024 field inventory and previous research conducted within the park, it is clear that significant paleontological resources occur within CUVA. Future research on these fossils holds a high likelihood of yielding important scientific information as well as potential new species.
This report provides foundational data on the scope, significance, and distribution of paleontological resources at CUVA and provides recommendations to support the management, interpretation, and research of these resources.
Structural changes in the foreign sector and its consequences for the economy of Ukraine
Authors: NAZARKEVYCH Ihor , DUBYK Viktoriia
Published: September 2024

The paper defines the essence and role of the external sector in the development of the national economy. It has been studied that the main endogenous and exogenous factors affecting the state and structure of the external sector of the national economy are globalization, technological progress, foreign economic policy and economic integration. The impact of the war on the development of the external sector of Ukraine's economy is substantiated. In particular, the main consequences of the impact of the war on the external sector of Ukraine's economy are the disruption of trade, the insecurity of investments, and the instability of the national currency.
It was analyzed that during the period 2020-2022, the deficit of foreign trade in goods and services of Ukraine increased significantly, by more than two times. This negative trend was due to a significant reduction in the export of Ukrainian goods caused by military actions, which led to a decrease in production and complications with logistics. On the other hand, the import of goods to Ukraine decreased slightly. An important aspect is that the share of raw materials in the export structure is constantly growing. Only in the period of 2021-2022, the share of raw products in the export structure increased by as much as 13.3%, which is of a threatening nature in general for the national security of Ukraine. The structure of imports almost did not change, but the volume of imports also decreased, although significantly less than exports. Such a reduction in imports, especially in 2022, is dictated by the contraction of Ukraine's economy, primarily the level of consumption. Since at least 3 million people left Ukraine during the war, inflation and devaluation of the national currency increased, and the economy was partially transferred to military lines. It has been established that a chronic deficit in the balance of goods and services can lead to the accumulation of external imbalances and negatively affect the stability of the country's economy.
The analysis of the external debt structure of the Ukrainian economy reveals both challenges and opportunities. While the high level of external debt poses risks to economic stability, it also highlights the need for prudent fiscal management, structural reforms and investment in key sectors. By solving these challenges and using its strengths, Ukraine will be able to manage the dynamics of external debt and build a sustainable and growing economy.
Evaluation of financial strategies for balancing the investment climate in Ukraine
Authors: MARUSIAK Nataliia , MANYLICH Ivan , MANYLICH Vitalii
Published: September 2024

Introduction. Evaluation of financial measures to stabilize the investment climate in Ukraine is an extremely important topic in the conditions of modern economic development of our country. Investments play an important role in strengthening our economy. However, in order to achieve stable economic growth, effective financial strategies are needed, which will contribute to the improvement of the investment climate and its balance.
The purpose of this paper is to study financial strategies for balancing the investment climate in Ukraine. To achieve the goal, the following tasks were performed in the research process: the concepts of investment and investment climate were considered; the main financial strategies for balancing the investment climate in Ukraine were investigated.
Results. It is noted that the country’s investment climate is a set of political-legal, financial-economic, social, institutional, infrastructural, innovative and other conditions affecting investment activity. Creating a favorable investment climate is a key factor for attracting investments and ensuring further economic growth of the country. It was also noted that investments are the main tool for forming both microeconomic and macroeconomic proportions that determine the rate of economic growth. Availability of a sufficient volume of investments in vital areas is a guarantee of effective development and increase of the country’s investment attractiveness. In order to improve the investment climate in Ukraine, it is necessary to implement balanced and transparent financial strategies that will contribute to the stability of the economic environment, reduce risks for investors and ensure the efficient use of resources. It is critical to improve the regulatory environment by reducing bureaucratic barriers and increasing the transparency of procedures. Ensuring reliable protection of investors’ rights and fighting corruption is the basis for creating a trusting investment environment. Fiscal stability, including inflation control and effective public debt management, are important to maintain investment attractiveness. The development of financial markets, support for innovations and technological start-ups, as well as attracting international financial assistance will contribute to the stabilization of the economic environment and the reduction of risks for investors.
Conclusion. Implementation of these strategies can help Ukraine increase its investment attractiveness even in difficult current conditions and ensure sustainable economic development in the long term.
Formation of the prerequisites of the analysis of investment activities to the era of the establishment of the market economy
Authors: MUZYCHENKO Andrii , LAZARYSHYNA Inna
Published: September 2024

The paper is devoted to the study of the prerequisites for the development of investment activity analysis before the era of the formation of a market economy in the countries of European civilization. In the 21st century, investment activity has gained particular importance, and understanding the historical aspects of economic relations and accounting practices is crucial for its effective analysis. For this purpose, the paper systematizes and periodizes the stages of development of accounting and economic analysis, starting from the early civilizations up to the end of the 19th century.
The research employs a comprehensive set of methods, including dialectical, historical, abstract-logical, methods of induction and deduction, as well as expert evaluation and comparison methods. The application of these methods allowed for the identification of patterns in the development of accounting and economic activity analysis in connection with the evolution of socio-economic relations.
Significant attention is given to the analysis of the stages of accounting development, starting from its primitive forms in a natural economy to the emergence of complex accounting and analysis systems in the context of expanding commodity-money relations and the establishment of capitalist relations. The development of economic theory concepts, particularly mercantilism, physiocracy, classical and neoclassical theories, which influenced the formation of approaches to accounting and analysis, is also examined.
The research results indicate that the development of investment activity was closely linked with the evolution of economic relations, the growth of production scales, trade, and financial market services. Important prerequisites for the formation of investment analysis included the emergence of the institution of property, the development of commodity-money relations, and the need to account for and analyze capital to manage resources effectively.
The paper also systematizes information about the formation of investment analysis, which initially had an empirical nature and, with the development of accounting and economic theory, adopted a systematic approach. This laid the foundation for modern investment analysis, which is an important tool for making managerial decisions in a market economy.
Overall, the paper emphasizes the importance of a historical approach to studying the development of accounting and analysis, which allows for a better understanding of modern trends and challenges in the field of investment activity.