bluuebunny/crossref_metadata_2025 huggingface dataset:
PREVALENCE OF RESPIRATORY VIRUSES AMONG PATIENTS WITH SEVERE ACUTE RESPIRATORY TRACT INFECTIONS AND INFLUENZALIKE ILLNESS IN ANDAMAN ISLANDS
Authors: Sharma Shivangi , Kumar Achukatla , Lakshmikanth S. , Vijayachari P. , Nagaraju A.
Published: March 2023

Acute respiratory infections (ARI) are a major public health concern worldwide that affects a large number of the world's
population. Amongst the respiratory viruses, Inuenza viruses are becoming a major public health challenge with even
greater concern. Out of 1174 samples collected, 43 were positive with a total positivity rate of 3.66%for at least one virus. 41.86% subjects were
under 10 years old. Among the virus-positive cases, the inuenza A rate was highest 35(81.39%), followed by inuenza B 4(9.3%), Para inuenza
2(4.65%), Rhino virus 1(2.3%), and RSV 1(2.3%).
A STUDY TO IDENTIFY THE PRESENCE OF SEVERE CORONARY ARTERY DISEASE IN PATIENTS WITH NO ELECTROCARDIOGRAPHIC, BIOCHEMICAL AND ECHOCARDIOGRAPHIC EVIDENCE OF CAD USING CT CORONARY ANGIOGRAPHY
Authors: Khan Javed , Bhamu Surendra , Kumar Yadav Mohit , Ravikrishnan Aiswarya
Published: March 2023

INTRODUCTION:Acute chest pain is one of the most common reasons for seeking care in the emergency department
(ED), accounting for approximately 10% of all visits. The difficulty lies in discriminating patients with ACS or other lifethreatening conditions from those with non-cardiovascular,non-life-threatening chest pain.The diagnosis ofACS is missed
in approximately 2%ofpatients.But itis essential to rule out cardiovascular etiology of chestpain to avoidunnecessary cost
and complications of investigations and treatment. This study aims at identifying the prevalence of significant coronary
artery disease in patients with no electrocardiographic and biochemical evidence of coronary artery disease. AIM OF
STUDY: To identifying the presence of severe coronary artery disease in the patients with no electrocardiographic,
biochemical and echocardiographic evidence of CAD using CT Coronary Angiography. MATERIAL AND METHODS:
The study was conducted on 50 patients during a period of 4 months,admitted with history of chest pain without any ECG
evidence of STEMI, negative cardiac markers, no evidence of RWMA on 2D ECHO, or previous history of myocardial
infarction.RESULTS: Out of the 50 patients studied, 38 (76%) were males and 12 (24%) were females.A total of 6 patients
(12%) were found to have severe stenosis in major coronary arteries (stenosis > 70%) of which 4 were males (10.5%) and 2
were females (16.67%).CADRAD score≥3 was found in 9 patients (18%):6 males (15.78%) and 3 females (12%).Average
age of patients who presented with chest pain with no electrocardiographic and biochemical evidence of coronary artery
disease was found to be 61.7 years in males and 60.1 in females.66.7% of the female patients and 78.94% of male patients
were over the age of 55 years.CONCLUSION: Furtherworkupofpatientswith chestpainwith no electrocardiographic and
biochemicalevidenceofcoronaryarterydiseaseisnecessarytoavoidmissingdiagnosisofCAD
EFFECT OF BODY MASS INDEX ON PULMONARY FUNCTION OF ELDERLY PEOPLE OF NORTH INDIA
Authors: Khan Tazeen , Nazir Muzamil , Ali Khan Zahid
Published: March 2023

Background: Obesity significantly affects lung function which has been reported among children, adolescents and
adult age groups. However, there is limited research on effect of obesity on pulmonary function among elderly age
group.Methods:In this study 600 elderly people aged 65 years and above were selected from rural areas of Haryana in
whom lung function parameters including force expiratory volume in first second (FEV1),force vital capacity (FVC) and
FEV1/FVC were measured. Body mass index (BMI) was estimated and categorised into underweight, normal,
overweight and obese categories as per BMI classification of Asian Indians. Mean and standard deviations were
calculated and association between lung function parameters and body mass index was determined by one way ANOVA
test. Results: Mean age of subjects was 68 ± 5.2 years. Among all the three parameters, highest mean values were
observed among subjects with normal body mass index, whereas lowest mean FVC and FEV1/FVC values were
observed in underweight category and lowest mean FEV1 values in obese individuals. A statistically significant
difference in the mean FEV1 and FEV1/FVC values were observed between various body mass index categories.
Conclusion: Body mass index has significant impact on lung function of elderly people depicted by reduction in FEV1
and FEV1/FVC values in obese individuals
STUDY TO EVALUATE THYROID LEVELS IN CHRONIC KIDNEY DISEASE PATIENTS
Authors: Mariam Khatoon Afsheen , Ganesh Ganesh , Kiranma P. , Jaya N
Published: March 2023

Background- Chronic kidney disease is a highly prevalent condition with heightened risk for cardiovascular diseases,
infections, impaired physical functions and death. Low T3 levels are the most common lab findings followed by
subclinical hypothyroidism in CKD patients. Patients with hypothyroidism have clinically important reductions in
glomerular filtration rate.Hypothyroidism can also lead to hyperlipidemia & atherosclerosis in coronary and peripheral
vessels. Studies indicated that subclinical and clinical hypothyroidism were the risk factors for all cause mortality and
CVD death. Objective- To evaluate thyroid levels in Chronic Kidney Disease Patients. Methodology- Study was
conducted in Osmania General Hospital. 40 cases of CKD patients formed the study group and 40 normal healthy
individuals formed the control group. T3, T4, TSH levels were estimated using Chemiluminiscence Immunoassay.
Results- T3 levels were found low in cases (< 0.87ng/ml) as compared to controls.TSH levels were found high (>5.60
micro IU/ml) in cases as compared to controls. No significant difference was found between groups in T4 levels.
Conclusion- Patients who are appropriately treated for thyroid diseases have a less chance of developing renal
dysfunction.Thus, clinicians should be well educated on the role of thyroid hormones in relation to CKD so that proper
treatment can be delivered to the patient.
CLINICAL STUDY OF POST OPERATIVE COMPLICATIONS IN REPEAT LOWER SEGMENT CAESAREAN SECTION
Authors: Venkata Sravya Popuri , Susmitha Reddy Polareddy , anabhan Vasundharapadm
Published: March 2023

Introduction: Caesarean section is the delivery of a new born after a period of viability through the creation of an
incision on both the anterior abdomen and intact uterus.1 The rate of caesarean section has been raising globally over
the past decades,giving women the obstetric status of “prior caesarean section”the raising CS rate raises the possibility
of complications, particularly during the repeat procedure.2 Risk factors: Increased age of mother, multipara, multiple
pregnancies,increased amount of amniotic fluid,prolonged labour,induced labour,general anaesthesia.Objectives:To
study post operative complications among antenatal women with one are more previous caesarean section. Methods:
Hospital based observational study done in Department of Obstetrics and Gynaecology at Katuri Medical College&
Hospital , Guntur from March 2021 to December 2022. Sample size- 100. Results: Out of 100, 30 cases had post op
complications.
Ÿ Post partum hemorrhage – 33.3%
Ÿ Urinary tract infection – 13.3%
Ÿ Post partum blues – 6.7%
Ÿ Surgical site infection –13.3%
Ÿ Paralytic ileus – 10%
Ÿ Hematoma – 6.7%
Ÿ Wound dehiscence – 6.7%
Ÿ Deep vein thrombosis – 3.3%
Ÿ Pneumonia – 3.3%
Ÿ Burst abdomen – 3.3%
Conclusion: Meticulous post op monitoring is required to detect post op complications and treat them appropriately to
prevent morbidity and mortality.
LEVOBUPIVACAINE VS ROPIVACAINE FOR SUPRACLAVICULAR BRACHIAL PLEXUS BLOCKS IN PATIENTS UNDERGOING UPPER LIMB SURGERIES IN A TERTIARY CARE CENTRE
Authors: Sarma Rushna , Gohain Marine , Prasad Tayung Raju , Kr Das Karuna
Published: March 2023

Regional anaesthesia techniques are gaining widespread
popularity and are a well-accepted component of
comprehensive anaesthesia care. They provide better
regional analgesia as compared to other modalities like
general anaesthesia and have been shown to decrease
postoperative opioid requirements. Supraclavicular brachial
plexus blocked, considered as the spinal anaesthesia of the
upper limb, is easy to perform, safe, and provided excellent
regional anaesthesia with almost no side effects when good
techniques and proper precautions are employed.
Bupivacaine is a commonly used and widely available since
local anaesthetic that is frequently used in supraclavicular
brachial plexus blocks due to its predictable profile and cost
efficiency, but concerns have been raised over its potential
cardiotoxicity and neurotoxicity
EFFECT OF CYTHION ON BEHAVIOURAL PATTERN OF SOME AQUATIC ORGANISMS
Authors: C. Kulkarni Kalpana
Published: March 2023

Different types of pesticides like organophosphate,organochlorine are known to produce several behavioural changes
in aquatic organisms. Exposure to pesticide is known to affect both the central and peripheral nervous system.Pollution
stresses on behavioral pattern includes a wide range of effects an predator avoidance, migratory behaviour, learning
ability habitat selection,feeding behaviour, changed movements and attitude loss of sensation .Study showed that the
crab,fish and snail were more sensitive to cythion .The 24 h LC50 values obtained were the highest in all cases followed
by 48,72 and lowest for 96 h among all exposure periods.It showed that the toxicity of pesticide is directly proportional to
exposure time. The LC50 values decreased as the exposure period increased and mortality rate increased with
increasing concentrations.These toxicity studies are important because of their economic importance and vital
position in the food chain and food web of the aquatic ecosystem
A STUDY ON VARIATIONS IN INFLAMMATORY MARKERS PROFILE OF COVID-19 PATIENTS AND ITS CORRELATION WITH SEVERITY OF DISEASE.
Authors: Jayant Santosh , Jain Arun , Niranjan Amit , Mishra Vartika , Sahai Shweta , Gaur Rajesh
Published: March 2023

Background: Since covid has emerged as the most dreadful global health crisis and data on diagnostic profile and
morbidity mortality indicators in it is still limited, we propose to study the correlation of morbidity and mortality with
values of Inflammatory markers in these patients. To STUDY variations in INFLAMMATORY MARKERS IN Aim: COVID19 PATIENTS and correlating it with severity of disease. using CLIA technique, four Materials and Methods:
inflammatory markers ( TROPONIN -I , ferritin, procalcitonin, IL -6) were studied among 400 patients. This was correlated
with severity of the disease outcome among the patients. Among the inflammatory markers we studied Results: IL-6
,Ferritin,Troponin -I ,Procalcitonin. Raised values of IL-6 and raised ferritin levels were associated with severity.
Troponin I (91%) ,Ferritin( 70.8%) ,Calcitonin ( 78.5%) were increased but showed no association with mortality.
However only IL-6 seems to be associated with increased mortality among Covid patients. On the basi Conclusion: s of
findings in this study Inflammatory markers particularly IL -6 and ferritin can be concluded as important predictors of
disease severity and outcome.These parameters can be used to identify high-risk patients at resource-limited settings
LOKPAL BILL IN PRESENT INDIAN POLITICAL SYSTEM
Authors: H Basavaraja
Published: March 2023

Corruption is rampant in India's democratic system for many reasons. Lokpal, Lokayukta and Prevention of Corruption
Acts have been enacted to eliminate it. However, its quantity has not decreased. Solutions need to be found and
enforcement measures taken.In this regard an attempt has been made through this article.
ANATOMY LEARNING MADE EASY IN COVID-19 PANDEMIC: ONLINE MEDICAL TEACHING
SYSTEM AMONG THE 1ST YEAR MBBS STUDENTS: A DESCRIPTIVE CROSS – SECTIONAL STUDY
Authors: Singh Kala Janpreet , Tyagi Avi , Subhash B , Tandon Aseem , Dev Singh Jamwal Vishen
Published: March 2023

Introduction: Many teaching institutes adopted the online teaching system during COVID-19 pandemic. The
Department of Anatomy Armed Forces Medical College had also shifted to online platform for teaching anatomy in a
better way.This study was undertaking with an aim to get the student`s perspective about the efficacy of online teaching
system for learning anatomy and to explore and rectify the lacunae and address the challenges faced by students and
teachers. Methodology: a total of 300 students were enrolled, 150 each from 1st year MBBS of batches 2019 and 2020
Results: Findings suggested that student's perception towards online learning was better than offline learning.
However, the major challenges were problems in internet connection, practical anatomy, having to learn more points
related to the topic in a short allocated time and difficulties in logging onto the online platforms.The reliability of internet
connection was a major factor affecting their study of anatomy and selecting learning resources.Social media platforms
especially WhatsApp were helpful in assisting students in their study and communication between themselves and their
teachers, may be because of lesser use of bandwidth. However, assessments and practical demonstrations in anatomy
were not same as during offline teaching mode.Conclusion: COVID-19 pandemic was disruptive to medical education.
Poor Internet connection was the major bug bear faced by the students, while the social media platforms especially
WhatsApp was a helpful tool in study and communication. Students urged improvement in the modes of practical
teaching of anatomy and assessment.
SUBJECTIVE WELL-BEING, SELF-EFFICACY AND LOCUS OF CONTROL AMONG YOUNG ADULTS
Authors: Dass Kajal , Babu NC Kiran
Published: March 2023

The current study sought to investigate young adults in the age range of 18 to 24 years' subjective well-being, locus of
control, and self-efficacy following the Corona virus pandemic. The purpose of this study was to comprehend the
relationship between subjective well-being, self-efficacy,and locus of control as well as any gender differences among
young adults concerning the three variables and any variations in the three variables based on the socioeconomic status
of the young adults. The findings showed that Subjective well-being and Self Efficacy had a significant positive
relationship and a negative correlation with Locus of control. Subjective well-being and self-efficacy among young
people did not differ based on gender. Subjective well-being and locus of control did not differ according to
socioeconomic status,but self-efficacy levels did according to the socioeconomic status of the young people
Legal Reconstruction of Land Dispute Settlement Based on Justice Value
Authors: Hulu Fonaha , Gunarto Gunarto , Mashdurohatun Anis
Published: March 2023

The purpose of this study is to analyze the weaknesses in land dispute resolution regulations, as well as to reconstruct land dispute settlement regulations based on the value of justice. The research method used in this study is a normative juridical method with data analysis based on a qualitative approach. The results of the research show that the settlement of cases through courts in Indonesia costs high, not to mention the long completion times and complicated court bureaucracy. Through the reconstruction of land settlement regulations based on the value of justice, the author offers a solution in the settlement of land disputes, namely being required to mediate before land disputes are brought to court. 21 of 2020 article 2 point e. In addition, a National Land Commission (KPN) must be formed in accordance with the Agrarian Government Regulation/Head of the Republic of Indonesia's National Land Agency No. 21 of 2020 article 3, this can facilitate the process of regulation of land dispute resolution based on the value of justice that benefits various parties in the field of financing, time and accelerates the resolution of cases of land dispute settlement which has long since piling up in court.
Disrupted Sojourn and Forced Reentry: A Qualitative Inquiry of College Students’ Experiences, Stressors, and Coping Strategies After Returning Home During the COVID-19 Pandemic
Authors: Fanari Alice , Segrin Chris
Published: March 2023

This study explores the unique experience of disrupted sojourns and early reentry among U.S. college students who were abruptly repatriated from their study abroad experience in March 2020. Using a combination of focus groups and interviews with 25 U.S. returning students, the findings suggest that students’ experiences were characterized by themes of accelerated reentry and a deep grieving process, as well as numerous financial, academic, interpersonal, and COVID-19 related stressors. The findings also highlight returning students’ coping strategies of staying busy, seeking social support, and reframing the situation under a positive light. This research provides insights into the challenges and adjustments associated with a heretofore unstudied phenomenon of early reentry among returning students. Important practical implications for study abroad programs and administrators who might face additional cases of early reentry due to the uncertainty of the pandemic are discussed.
Application of photodynamic inactivation against pathogens of urinary tract infections
Authors: Ignatova Nadezhda I. , Elagin V.V. , Budruev I.A. , Antonyan A.E. , Streltsova O.S. , Kamensky V.A.
Published: March 2023

Photodynamic inactivation (PDI) is an alternative to antibiotic therapy method for biocidal action against microorganisms, which can be used for lithotripsy and sanitation of the bladder cavities.

Objective.
Selection of parameters and application PDI against uropathogenic microorganisms.

Materials and Methods.
In this study we used bacterial strains isolated from urine samples of patients. Differentiation media and biochemical plates were used for identification of microorganisms. The sensitivity of uropathogenic microorganisms to PDI was studied on pure cultures and in native urine. The photosensitizer “Photoditazine” (50 µg/ml) was used in the work, as well as Triton X-100 (5 % vol.) was applying to increase the permeability of the cell wall of gram-negative microorganisms. The samples were irradiated by a medical laser device “Latus-K” with a wavelength of 662 nm. To assess the effectiveness of PDI, the values of the logarithmic decrease of colony-forming unit (CFU) of the microorganisms were calculated. Statistical analysis was made by Statistica 10.0 and Mann-Whitney criterion.

Results.
50 strains of uropathogens belonging to 18 species were isolated from 36 samples of native urine. Among them, the most common were S. aureus, E. coli, P. aeruginosa, K. pneumoniae. The value of logarithmic decrease in CFU for gram-positive bacteria ranged from 5 to 6, which corresponds to inactivation 99.999-99.9999% of bacterial cells in a sample. For gram-negative strains, this value was slightly lower and ranged from 4 to 5.5, which, nevertheless, corresponds to inactivation 99.99-99.999% of CFU bacteria. The addition of Triton X-100 increase the efficiency from 46% to 99.99% for E. coli, from 99% to 99.99% for P. mirabilis, from 16% to 94% for K. pneumoniae and from 97% to 99.999% for P. aeruginosa. It should be noted that the PDI was affect microorganisms both in isolated pure cultures and in native urine.

Conclusions.
Photodynamic inactivation may be considered as an alternative to antibiotic therapy method of biocidal action against uropathogenic microorganisms.
Media Dissemination of Smart Cabinets at RA AL Kholafiyah Brani Kulon Maron Probolinggo
Authors: Rofikha Nuriyanti  , Ludfi Arya Wardana  , Ulfi Kurniawati  , Ni Putu Ayu Cahaya Putri  , Asfia Innisya
Published: March 2023

The problem that occurs in schools is that the real condition is learning in TK/RA children. Learning media is not complete and there is no visual form of learning media that can be used to develop the cognitive aspects of students. This is because seen from the characteristics of the material it requires a visual explanation in the form of a stationary object but can be used as an innovative learning medium. In addition, printed books are considered less motivating and increase the attractiveness of students in learning so that learning outcomes cannot be maximized. From these problems, the ideal condition to be achieved is the need to develop a learning media in the form of interactive and innovative media that can provide knowledge to students. With interesting media, it is hoped that it can increase motivation, the attractiveness of students to learn so that it can improve student learning outcomes.
Training and Assistance in Making E-LKPD Using “LiveWorksheets” Aplication at SD Alam Cordova Probolinggo
Authors: Ani Anjarwati  , Ryzca Siti Qomariyah  , Alvin Kurnia  , Putri Fatimattus Az Zahra  , Muhimma Yatun Nisa’ul Ulya
Published: March 2023

In the era of the industrial revolution 4.0, we are in an era of increasingly developing technology so that it requires people to be technologically literate, especially to the world of education. The industrial revolution 4.0 provides support for the learning process. The industrial era 4.0 is very helpful for educational problems that occur during the COVID-19 pandemic. During the COVID-19 pandemic, the learning process was carried out using branded learning by combining face-to-face and online learning. So that educators find it difficult to choose learning methods and media after carrying out full school online. However, educators are required to continue to provide learning materials and assignments to students because of the demands to obtain student grades on each thematic. This activity aims to introduce the LKS application directly to assist educators in making E-LKPD which can be a means of transferring students' knowledge to understand the material and get grades automatically. The training method is carried out online with the Google Meet application. The material is divided into four points and delivered in two stages, followed by the teachers of SD Alam Cordova. The results of this online “Liveworksheets” training show that teachers can apply “Liveworksheets” well.
COMPARISON OF TWO WAYS OF CONSTRUCTING A CROSS-SECTION KERNEL: DISCRETE AND CONTINUOUS
Authors: Викулов С.В. , Пахомова Л.В. , Инкижинов Н.С.
Published: March 2023

В данной работе приводятся два способа построения ядра сечения для цилиндрических стержней, имеющих различные формы поперечного сечения. Дается название этих способов. Один из способов, общеизвестный в сопротивлении материалов, назван дискретным в соответствии с конечным числом угловых шагов нейтральных прямых, касающихся контура поперечного сечения. Ядро сечения, построенное дискретным способом, имеет форму выпуклого многоугольника с числом сторон, равным числу угловых шагов при окатывании касательной вокруг контура поперечного сечения на 360º. Второй способ построения ядра сечения назван непрерывным в соответствии с непрерывным поворотом касательной по криволинейному контуру поперечного сечения. Ядро сечения или его часть, соответствующая этому криволинейному контуру, имеет вид гладкой непрерывной линии. Эта гладкая кривая строится по выведенному уравнению ядра сечения. Формулы координат ядра сечения, соответствующие этим двум способам, сопоставляются между собой. Доказывается тождественность этих формул координат сечения. Приведена формула углового коэффициента касательной к контуру ядра сечения, которая является справедливой для обоих способов.

In this paper, two methods are given for constructing a cross-section core for cylindrical rods having different cross-sectional shapes. The name of these methods is given. One of the methods commonly known in the "Resistance of materials" is called discrete in accordance with a finite number of angular steps of neutral lines touching the contour of the cross section. The cross-section core, constructed in a discrete way, has the shape of a convex polygon with the number of sides equal to the number of angular steps when the tangent is rolled around the contour of the cross-section by 360 °. The second method of constructing the cross-section core is called continuous in accordance with the continuous rotation of the tangent along the curved contour of the cross-section. The core of the section or its part corresponding to this curved contour has the form of a smooth continuous line. This smooth curve is constructed according to the derived equation of the cross-section kernel. The formulas of the coordinates of the core of the section corresponding to these two methods are compared with each other. The identity of these formulas of the section coordinates is proved. The formula of the angular coefficient of the tangent to the contour of the core of the section is given. This formula is valid for both ways.
Methods for improving the efficiency of a wind power plant and reliable estimation of output control parameters and disturbances
Authors:   Buyalskiy V.I.
Published: March 2023

A method for controlling a wind power plant based on the use of the optimization model that takes account of the drive vibration loading under different operating modes of the power unit is validated. The transfer functions of the rotor systems dynamic links are proposed, taking account of the influence of wind speed and electrical load, the block diagram of the control system and the transient process graph of the angular velocity regulating of the installation generator rotor. To ensure the reliability of the output control parameters and disturbing influences estimation, the determining method substantiation of the dynamic links correlation coefficients for the wind power plant rotor system is performed. These coefficients are necessary to develop models of the system dynamic behavior used in the modification of the wind power plant automated control in order to reduce the vibrations of all rotor systems elements under different operating modes of the power unit that will improve the reliability of modern wind turbines. The correlation function parameters to determine the correlation dependences for the measured values of wind speed and electrical load are found. Formulas are derived for determining the spectral density of input and output random processes at changing wind speed and electrical load, as well as the mutual spectral density of input and output random processes for dynamic links of rotor systems (rotary blades, rotor, generator, gearbox) based on the block diagram of the entire process in order to determine the correlation degree of transfer functions. The analysis of the input and output signals of the transfer functions with respect to their coherence is carried out from a correlation coefficients calculation of the rotor systems dynamic links. This makes it possible to describe the transfer function within the framework of the vibration fields analysis for the unit as a whole.

Keywords
wind power plant, control, rotor system, vibration, correlation coefficient
Mathematical model of the UAV landing approach system on the example of the course-glide path system
Authors:   Talpa K.D. Maslennikov A.L.
Published: March 2023

A mathematical model of the landing approach system for an unmanned aerial vehicle (UAV) on the example of a course-glide path system (СGS) is presented. The proposed mathematical model includes an information model of the ground and airborne segments operation for the approach system. The mathematical model of the ground segment implements the calculation of the CGS radio signals power level at a given point in space — the position of the UAV. The mathematical model of the onboard segment implements the determination of the UAV getting into the radio beacon coverage area and the calculation of the UAV deviation angles from the glide path line. The UAV dynamics model is considered as a set of pre-obtained trajectory points. The carried out computational experiments showed the fundamental adequacy of the mathematical model and its application possibility for checkout automatic control systems for aircraft-type UAVs during landing approach.

Keywords
UAV, landing approach system, course-glide path system, localizer, glide path radio beacon, marker beacon, mathematical model, UAV landing
Analysis of methods for improving network reliability during virtualization of network components
Authors:   SHibaev R.V.
Published: March 2023

The increase in the volume of data exchange and the complexity of network topologies leads to an increase in the requirements for ensuring reliability and guaranteed delivery of information. Known methods of improving reliability, based on redundant devices or the presence of several redundant paths, require more and more computing power. In addition, these methods do not always satisfy the requirements for the uptime of physical telecommunications equipment. The article reviews the existing methods for improving the reliability of information delivery in virtualized networks. Ways to improve the quality of network operation using network functions virtualization mechanisms are proposed for consideration.

Keywords
network, network virtualization, software-defined networks, reliability
Study of topography of surface layer of structural steel subjected to electromechanical coining
Authors: Dudkina N.G. , Zakharov I.N. , Romanenko M.D. , Barinov V.V.
Published: March 2023

The results of studies of the formation of a discrete structure of a hardened surface layer of normalized steel 45 after electromechanical processing with the dynamic application of a deformation force (electromechanical chasing EMC) are presented. The influence of the treatment current density on the macrogeometry, structure and microhardness of surface-hardened steel specimens has been established. It is shown that EMС allows creating discrete structures on the treated surface, consisting of hardened and non-hardened metal zones with various topography. The main dependences are given that connect the characteristics of discrete structures of different topography with the parameters of the electromechanical coinage mode. The results obtained can be used to provide a targeted distribution of physical and mechanical properties in the surface layer after EMС depending on the specific operating conditions of the parts.
Pengaruh Metode Jigsaw Terhadap Hasil Belajar Siswa Kelas VII A Pada Materi Operasi Hitung Bentuk Aljabar SMP Negeri 8 Kota Bima
Authors: Sriaryaningsyih
Published: March 2023

Tujuan dari penelitian ini adala untuk mengetahui hasil belajar siswa sebelum dilakukannya metode    jigsaw kelas VII di SMP Negeri 8 kota bima dan mengetahui pengaruh metode jigsaw terhadap hasil belajar matematika siswa kelas VII di. SMP Negeri 8 kota bima.Penelitian ini menggunakan jenis penelitian kuasi eksperimen (quasi experimental). Berdasarkan analisis data dan pembahasan hasil penelitian yang telah diuraikan pada bab IV, maka peneliti dapat memberikan kesimpulan bahwa: ada pengaruh signifikan pada metode jigsaw terhadap hasil belajar siswa kelas VII terkait materi operasi hitung bentuk aljabar di SMPN 8 kota bima.  Hal ini sesuai dengan pengujian hipotesis menggunakan uji t pada taraf 5% untuk hasil belajar dengan menggunakan metode jigsaw dengan nilai thitung = 4,478 > ttabel = 1,66426, dengan taraf signifikasi = 0,001 < 0,05 yang mempunyai arti Ho ditolak dan Ha diterima
SIMULATION OF THE TRAJECTORY OF AN ELECTRIC WHEELCHAIR CONTROLLED THROUGH PROGRAMMABLE LOGIC CONTROLLER AND HMI
Authors:   ", CÎRSTOIU Adelina-Maria ,   University POLITEHNICA of Bucharest Faculty of Electrical Engineering", CHIRILĂ Aurel- Ionuț ,   "University POLITEHNICA of Bucharest Faculty of Electrical Engineering", DEACONU Ioan-Dragoș ,   "University POLITEHNICA of Bucharest Faculty of Electrical Engineering"
Published: March 2023

This paper presents a software module made by means of a programmable logic controller and an HMI (Human Machine Interface), designed to control the movement of an electric wheelchair. By developing this module, a major advantage is offered to people with disabilities, who have movement difficulties. By implementing this command on a wheelchair, people can move independently using this machine that can be controlled from a touch screen. In this direction, the user has the possibility to choose the following directions of movement of the car: forward-backward and left-right, as well as the possibility to impose the speed of movement. The software program was created using ladder diagram language, and the user interface is provided through an HMI.
NUMERICAL ANALYSES ON THE RESPONSES OF UNIMORPH AND BIMORPH PIEZOELECTRIC HARVESTERS IN TIME DOMAIN
Authors:   ", VELI Yelda ,   University POLITEHNICA of Bucharest Faculty of Electrical Engineering", SĂVESCU Claudia ,   "University POLITEHNICA of Bucharest    Faculty of Electrical Engineering Romanian Research and Development Institute for Gas Turbines COMOTI, Bucharest, Romania", MOREGA Alexandru-Mihail ,   "University POLITEHNICA of Bucharest  Gheorghe Mihoc–Caius Iacob” Institute of Statistical Mathematics and Applied Mathematics, Romanian Academy", COMEAGĂ Daniel ,   "University POLITEHNICA of Bucharest Faculty of Electrical Engineering"
Published: March 2023

The paper presents the assessment of the electric output rendered by a unimorph and a bimorph piezoelectric harvester, with one and two active piezoceramic wafers, using numerical simulations. Expected sinusoidal voltages were obtained in a time-dependent study, with a time step corresponding to the eigenfrequency found after conducting an Eigenfrequency study. The terminal voltages obtained agree with the Euler-Bernoulli beam theory and with the distance of the piezoelectric layers from the neutral fiber. By adding an electric circuit node to the electric field problem to form a closed internal circuit, a single unified sinusoidal voltage response should be obtained, coinciding with the input vibration signal. The independent voltages of the layers of a piezoelectric structure with more than one layer (usually two or four) cannot be observed experimentally, as a harvester has only two terminals that pick the overall electric response from all the layers, giving a single alternating voltage output.
DESIGN OF AN HTS SUPERCONDUCTING ELECTROMAGNET INTENSE AND UNIFORM MAGNETIC FIELD GENERATOR
Authors:   Institutul național de Cercetare-Dezvoltare pentru Inginerie Electrică ICPE-CA, DUMITRU Goerge , DOBRIN Ion ,   Institutul național de Cercetare-Dezvoltare pentru Inginerie Electrică ICPE-CA, Enache Dan ,   Institutul național de Cercetare-Dezvoltare pentru Inginerie Electrică ICPE-CA
Published: March 2023

The paper presents the important elements for the design of an HTS superconducting electromagnet, generator of an intense magnetic field (5T) and of high uniformity (<1%). To establish its geometric and functional parameters, the value of the induction of the generated magnetic field and the uniformity in its central area were taken into consideration. Numerical modeling of the generated magnetic field was performed in Comsol Multiphysics. The characteristics of the YBCO type HTS superconducting material were also taken into account. The coils will be made in the form of double buckets of superconducting tape, the chosen configuration being Helmholtz type. In this way, the central magnetic field area of ​​the electromagnet is accessible for applications from two directions: vertical and horizontal.
ASPECTS REGARDING THE SIMULATION OF THE OPERATION OF THE CONTROL PART FOR A THREE-PHASE VOLTAGE INVERTER USING OPEN SOURCE SOFTWARE TOOLS
Authors:   ", STĂNESCU Dan Gabriel ,   University POLITEHNICA of Bucharest Faculty of Electrical Engineering", BUȘE Marian Cosmin ,   "University POLITEHNICA of Bucharest Faculty of Electrical Engineering", SÎRBU Ioana Gabriela ,   "University POLITEHNICA of Bucharest Faculty of Electrical Engineering", MANDACHE Lucian ,   "University POLITEHNICA of Bucharest Faculty of Electrical Engineering", DINU Radu Cristian
Published: March 2023

In this paper, a series of aspects regarding the simulation of the control part related to a three-phase voltage inverter with PWM modulation are presented. The simulations were carried out using an open source software. The advantage of using this type of software is related to the fact that simulations can be carried out quickly, results can be validated, analyzes can be made, without the need for commercial software tools.
L’IA, LES MUTATIONS DU TÉLÉMARKETING ET L’ÉCOLOGIE
Authors: Michaud Thomas
Published: March 2023

Le métier de téléconseiller pourrait disparaître dans les prochaines années, remplacé par des chatbots. Les imaginaires du futur du marketing révèlent les peurs et aspirations de la société face à l’IA et mènent à repenser en profondeur la manière de vendre les nouveaux produits.
EVALUATION OF LAND COVER, LAND USE AND WATER QUALITY IN THE REGIONS WITH VARIOUS ANTHROPOGENIC ACTIVITY – A CASY STUDY OF OSAM RIVER BASIN, BULGARIA
Authors:   National Institute of Geophysics, Geodesy and Geography-Bulgarian Academy of Sciences (NIGGG-BAS), Hydrology and Water Management Research Center, Sofia 1113, Acad. G. Bonchev str., Bulgaria., GARTSIYANOVA Kristina , GENCHEV Stefan ,   National Institute of Geophysics, Geodesy and Geography-Bulgarian Academy of Sciences (NIGGG-BAS), Department of Geography, Sofia 1113, Acad. G. Bonchev str., Bulgaria, KITEV Atanas ,   National Institute of Geophysics, Geodesy and Geography-Bulgarian Academy of Sciences (NIGGG-BAS), Department of Geography, Sofia 1113, Acad. G. Bonchev str., Bulgaria
Published: March 2023

Nowadays the world´s demand for natural resources is more pressing than ever before. The good quality of the water and it’s enough quantity, the provision of energy sources and food is a very important and difficult issue. This challenge could be done by ensuring a better management of the mentioned resources. Strengthening synergies and reducing trade-offs among the sectors is possible by applying a Nexus approach. This article aims to assets the land cover, land use and water quality in the upper and middle catchment of the Osam River (municipalities of Troyan and Lovech) for the period 2012-2019. Land use and land cover is a key factor in relation to water quality characteristics. The emphasis is on acquiring new knowledge through spatio-temporal analysis of the problem. To assess the river water quality this study considers the following parameters: pH, dissolved oxygen (DO), electric conductivity (EC), ammonia (N-NH4), nitrates (N-NO3), nitrites (N-NO2), phosphates (P-ortho-PO4), biological oxygen demand (BOD5). To identify the land use/cover in the region was based on GIS, digital topographic and thematic maps, Corine Land Cover data, high-resolution satellite imagery (Google Earth), digital elevation model, statistics and field studies. The obtained results are a good basis for popularizing the Nexus paradigm at different scales (i.e., local, regional, national, European and beyond) including planning and elaboration of the necessary policies for sustainable management of both land use and river waters in terms of their quality.
AN ENVIRONMENTALLY BENIGN APPROACH FOR GOLD RECOVERY FROM GOLD-BEARING ORE: MODELING AND OPTIMIZATION
Authors:   Chemical Engineering Department, Faculty of Engineering, Alexandria University, Alexandria, Egypt, MUANDA Meschack Mukunga , OMALANGA Pele Pascal Daniel ,   Department of Industrial Chemistry, Faculty of Polytechnic, University of Lubumbashi, Lubumbashi, Democratic Republic of the Congo, ANNYFA Anaïs Belembo ,   Chemical Process Engineering Department, School of Industrial Engineers, University of Lubumbashi, Democratic Republic of the Congo, MITONGA Vanessa Mwambaie ,   Civil Engineering Department, School of Industrial Engineers, University of Lubumbashi, Democratic Republic of the Congo, ILUNGA Michée Ngoy ,   Electrical Engineering (Computer Engineering) Department, School of Industrial Engineers, University of Lubumbashi, Democratic Republic of the Congo
Published: March 2023

The current work focuses on the extraction of gold using alpha-cyclodextrin (α-CD) from the Kimpese quarry in the Democratic Republic of the Congo, through an environmentally friendly gold process as an alternative to the amalgamation process. The ore was sampled and characterized using atomic absorption spectroscopy (AAS) prior to the experiments, and the analysis revealed 0.08% of gold. The ore was then leached with modified aqua regia (MAR). Time, HBr concentration, pH, and stirring speed were all varied during leaching to highlight the parameters that influence the leaching yield. The optimum conditions were determined using analysis of variance (ANOVA) and response surface methodology (RSM), implying time, HBr concentration, pH, and stirring speed of 6 hours, 80g/l, 1, and 800rpm, respectively, and a leaching percentage of 98.6928%. Following leaching, neutralization tests with potassium hydroxide (KOH) were performed by varying the following parameters: time, KOH concentration, and pH. The following factors were varied in the extraction tests after neutralization: time, α-CD concentration, pH. The optimal parameters were as follows: time of 30 minutes, α-CD concentration of 8.8639g/l, and pH of 6, with yield of 89.7350%. This method of recovering gold from ore using α-CD is inexpensive and does not harm the environment.
Anticiper l’impact de la météo sur l’influent des stations d’épuration grâce à l’intelligence artificielle
Authors: HARINAIVO A. , HAUDUC H. , TAKACS I.
Published: March 2023

Le changement climatique a pour conséquence l’apparition de forts événements pluvieux de plus en plus fréquents, occasionnant de fortes variations de débit et de concentrations à l’influent des stations d’épuration. La connaissance des risques d’orage et des débits potentiels plusieurs heures ou plusieurs jours en avance permettrait d’anticiper les adaptations opérationnelles pour préparer la station et protéger les différents ouvrages des risques de défaillance. Dans cette étude, les données météorologiques (pluies, température, vents, humidités, précipitations…) et l’historique des données d’influent de la station sont utilisés pour entraîner un algorithme d’intelligence artificielle, d’apprentissage automatique et d’apprentissage profond pour prédire les débits entrants sur la station jusqu’à une semaine en avance. Trois jeux de données journalières et horaires, de 1 à 3 ans, sont utilisés pour entraîner un modèle de Forêt aléatoire à 30 arbres, un modèle LSTM (long short-term memory) et un modèle GRU (gate recurrent unit) à trois couches de 100 neurones suivis chacun d’un dropout de 20 % et une couche de sortie entièrement connectée. Les données sont préalablement nettoyées pour supprimer les valeurs aberrantes et sont réparties à 80 % pour les données pour l’apprentissage et 20 % pour les données de test afin d’obtenir des modèles avec les meilleures prédictions. Les algorithmes utilisés dans cette étude sont simples et détectent bien les pics. La durée de l’entraînement sur les données de trois ans se fait en moins de deux minutes pour la Forêt aléatoire et en moins d’une demi-heure pour les réseaux de neurones LSTM et GRU. Les résultats montrent que les données horaires et la prise en compte de l’effet de l’historique par l’utilisation des réseaux de neurones récurrents LSTM et GRU permettent d’obtenir une meilleure prédiction des débits d’influent. Les séries de données plus longues permettent également un meilleur apprentissage des algorithmes et une meilleure prédiction du modèle.
3D-Printed disposable nozzles for cost-efficient extrusion-based 3D bioprinting
Authors: I. Albalawi Hamed , N. Khan Zainab , H. Rawas Ranim , U. Valle-Pérez Alexander , Abdelrahman Sherin , A. E. Hauser Charlotte
Published: March 2023

3D bioprinting has significantly impacted tissue engineering with its capability to create intricate structures with complex geometries that were difficult to replicate through traditional manufacturing techniques. Extrusion-based 3D bioprinting methods tend to be limited when creating complex structures using bioinks of low viscosity. However, the capacity for creating multi-material structures that have distinct properties could be unlocked through the mixture of two solutions before extrusion. This could be used to generate architectures with varying levels of stiffness and hydrophobicity, which could be utilized for regenerative medicine applications. Moreover, it allows for combining proteins and other biological materials in a single 3D-bioprinted structure. This paper presents a standardized fabrication method of disposable nozzle connectors (DNC) for 3D bioprinting with hydrogel-based materials. This method entails 3D printing connectors with dual inlets and a single outlet to mix the material internally. The connectors are compatible with conventional Luer lock needles, offering an efficient solution for nozzle replacement. IVZK (Ac-Ile-Val-Cha-Lys-NH2) peptide-based hydrogel materials were used as a bioink with the 3D-printed DNCs. Extrusion-based 3D bioprinting was employed to print shapes of varying complexities, demonstrating potential in achieving high print resolution, shape fidelity, and biocompatibility. Post-printing of human neonatal dermal fibroblasts, cell viability, proliferation, and metabolic activity were observed, which demonstrated the effectiveness of the proposed design and process for 3D bioprinting using low-viscosity bioinks.
Malignant versus normal breast tissue: Optical differentiation exploiting hyperspectral imaging system
Authors: Aref Mohamed Hisham , Aboughaleb Ibrahim H. , Hussein Abdallah Abdelkader , Farag Ayman Mohammed , El-Ghaffar Sara Abd , El-Sharkawy Yasser H.
Published: March 2023

Breast malignancy is a critical problem that severely affects women’s health globally with a high-frequency rate, necessitating fast, effective, and early diagnostic methods. The present study aims to measure the breast tissue’s optical properties by capturing the spectral signatures from malignant and normal breast tissue for therapeutic and diagnostic applications. The optical imaging system incorporates a hyperspectral (HS) camera to capture the spectral signatures for both the malignant and normal breast tissues within 400 ~ 1000 nm. The system was subdivided into two exploratory (reflection/transmission) to measure the tissue’s diffuse reflectance (Rd) and light transmission (Tr), respectively. The study involved 30 breast tissue (normal/tumor) samples from 30 females in the age range of 46 ~ 72 years, who were optically inspected in the visible and near-infrared (VIS-NIR) spectra. Then, the inverse adding doubling (IAD) method for breast tissue characterization and descriptive analysis (T-test) was exploited to verify the significant difference between the various types of breast tissues and select the optimum wavelength. Finally, comparing the study outcome with the histopathological examination to evaluate the system’s effectiveness by calculation (sensitivity, specificity, and accuracy). The average outcome values demonstrated that the optimal spectral bands distinguishing between the normal and the tumor tissues regarding the reflectance approach were 600 ~ 680 nm and 750 ~ 960 nm at the VIS and NIR spectrum, respectively. Then, for the transmission technique, the optimal spectral bands were 560 ~ 590 nm and 760 ~ 810 nm at the VIS and NIR spectra, respectively. Later, the T-test and the IAD verified that the highest Rd values for discrimination were 600 ~ 640 nm and 800 ~ 840 nm at the VIS and NIR spectra, respectively. On the other side, the highest Tr values were 600 ~ 640 nm and 760 ~ 800 nm at the VIS and NIR spectra, respectively. The investigation’s average reading accuracy, sensitivity, and specificity were 85%, 81.88%, and 88.8%, respectively. The experimental trials revealed that the system could identify the optimal wavelength for therapeutic and diagnostic applications through the light interaction behavior of the breast tissue’s optical properties.