bluuebunny/crossref_metadata_2025 huggingface dataset:
Vitamin D and COVID-19: Insight on Mechanism and Implementation in Equatorial Countries
Authors: Setyarini Indah Bachti , Nurul Ratna  , Ninik Mudjihartini
Published: August 2021

Coronavirus disease 2019 (COVID-19) is a global pandemic caused by Severe Acute Respiratory Syndrome Coronavirus-2 (SARS-CoV-2) infection, affecting millions of people worldwide due to its ease of transmission. Despite limited information on effective therapeutic options, vitamin D has been regularly reported to exert beneficial immunomodulatory effects affecting both innate and adaptive immune systems. As it is synthesized in the skin under ultraviolet radiation, population living in equatorial countries are presumed to have adequate vitamin D, however several studies have shown otherwise. This article is aimed to give an insight on the different mechanisms by which vitamin D affects our immune system in COVID-19, as well as discussing correlation of having sunlight all year round by being near the equator towards vitamin D adequacy.
Data References of Indonesian Walking Pattern at Low, Medium and High Speeds on Treadmills
Authors: Robin Novriansyah  , Agus Priambodo  , Marijo  , Yogatama Bagaskara
Published: August 2021

Introduction: Gait analysis is the study about how to move. However, the normal gait reference which is currently used is the normal gait of Europeans. The body proportions, leg length, and height between Europeans and Indonesians are different.Methods: The samples were 44 Indonesian aged 18 – 26 years which was divided into 22 males and 22 females. Samples used legging and socks that had been marked with a color at a certain point. The research sample walked on a treadmill at low, medium and high speeds and recorded from the back and sides. Based on the video, the angles of the hip joint, knee join was assessed.Results: In male subjects, the joint angles of low, medium and high speed walking: maximal thigh joint (21.30o, 21.77o, 22.67o), minimal thigh joint (-7.05o, -7.74o, 8.66o), maximal knee joint (55.25o, 57.00o, 60.04o), minimal knee joints (9.63o, 10.13o, 10.50o). In female subjects, the joint angles of low, medium and high speed walking: maximal thigh joint (24.02o, 24.43o, 24.99o), minimum thigh joint (-3.25o, -3.86o, -4.22o), maximal knee joint (53.60o, 56.80o, 58.99o), minimal knee joints (11.12o, 12.94o, 12.83o).Conclusion: The faster walking speed, the greater angle of thigh joint and knee joint
Anosmia Sebagai Faktor Prediktor Derajat Keparahan Ringan Pada Penderita COVID-19 Rawat Inap di Rumah Sakit Primasatya Husada Citra Surabaya
Authors: Wiyono  Hadi  , Titiek Ernawati  , Novita Bernadette , Tjipto Wibowo  , Vincentius Diamantino Supit  , Albert Setiawan  , Kevin Samsudin  , Ferdinand Erwin
Published: August 2021

Pendahuluan: Anosmia merupakan salah satu karakteristik klinis pasien COVID-19. Anosmia dilaporkan sebagai gejala pertama sebelum gejala yang lain. Penelitian sebelumnya menunjukkan anosmia berimplikasi sebagai faktor prognosis protektif pada pasien COVID-19. Melalui penelitian ini diharapkan dapat menggambarkan karakteristik pasien COVID-19 dengan gejala anosmia serta hubungannya dengan derajat keparahan.Metode: Penelitian studi deskriptif, cross-sectional, retrospektif dengan jumlah sampel 149 pasien dikonfirmasi COVID-19. Penelitian ini dilakukan pada pasien rawat inap mulai tanggal 01 Maret hingga 31 Juli 2020 di rumah sakit Primasatya Husada Citra Surabaya (RS PHC Surabaya). Pasien COVID-19 dibagi menjadi dua grup yaitu dengan dan tanpa gejala anosmia. Karakteristik klinis pasien dideskripsikan pada tabel dan dilakukan penghitungan odd ratio untuk mengetahui faktor risiko terjadinya derajat keparahan berat pada pasien COVID-19.Hasil: Pasien yang mengalami anosmia rata-rata berusia 32 tahun dengan jenis kelamin perempuan lebih banyak (63,2%), pasien dengan gejala anosmia didapatkan lebih banyak pasien dengan derajat keparahan rendah (89,5%) dengan odd ratio terjadinya derajat keparahan berat 0,479. Pasien dengan gejala anosmia disertai dengan gejala lain seperti batuk, rinorea, nyeri tenggorokan, sesak, nyeri kepala, dan nyeri otot (p < 0,05).Kesimpulan: Pasien COVID-19 dengan gejala anosmia memiliki derajat keparahan yang lebih ringan dibandingkan pasien yang tanpa gejala anosmia.
Pola Pengobatan Stroke Iskemik Pada Pasien Lansia di Rumah Sakit Hasan Sadikin Bandung
Authors: Togu Glenn Mark , Lisda Amalia  , Trully Deti Rose Sitorus
Published: August 2021

Pendahuluan: Stroke iskemik di Indonesia menjadi salah satu penyakit utama penyebab disabilitas dan mortalitas pada pasien lansia. Penuaan dikaitkan dengan peningkatan penyakit penyerta. Banyaknya penyakit penyerta pada lansia meningkatkan potensi peresepan polifarmasi yang berpotensi meningkatkan kejadian efek samping obat. Penelitian ini bertujuan untuk mengetahui karakteristik demografi, pola pengobatan, dan efek samping pengobatan pada pasien lansia dengan stroke iskemik.Metode: Penelitian ini merupakan penelitian deskriptif dengan rancangan potong lintang yang dilakukan pada September-Oktober 2020. Penelitian ini menggunakan data sekunder dari rekam medik pasien stroke iskemik yang dirawat di Rumah Sakit Umum Pendidikan Dr. Hasan Sadikin periode 2015–2019 dengan metode simple random sampling.Hasil: Karakteristik demografis pasien lansia dengan stroke iskemik didominasi oleh lansia muda berusia 60-69 tahun, laki-laki, dengan hipertensi sebagai faktor risiko terbanyak. Pola pengobatan politerapi (2-4 obat) ditemukan pada 79 pasien dan polifarmasi (>5 obat) terdapat pada 21 pasien. Enam pasien politerapi dan empat pasien polifarmasi mendapat efek samping pengobatan. Efek samping pengobatan yang terjadi meliputi stress ulcer, perdarahan saluran cerna atas, dan anemia. Kesimpulan: Pola pengobatan didominasi oleh pengobatan politerapi (2-4 obat). Persentase pasien polifarmasi (>5 obat) yang mengalami efek samping pengobatan lebih banyak dibandingkan dengan pasien yang mendapatkan pengobatan politerapi. Efek samping pengobatan didominasi oleh stress ulcer.
Kadar Serum Lipid Model Tikus Wistar Diabetik Dengan Terapi Ekstrak Kunyit Putih
Authors: Fiska Maya Wardhani  , Fachrul Azmi Tanjung
Published: August 2021

Pendahuluan: Diabetes dan obesitas adalah masalah kesehatan yang dapat mempengaruhi kehidupan manusia dari segi kesehatan, sosial dan ekonomi. Komplikasi yang diakibatkan oleh diabetes diantaranya adalah gangguan metabolism dan nefropati diabetikum. Rimpang kunyit putih (Curcuma zedoaria) memiliki manfaat diantaranya sebagai antioksidan, antiinflamasi, antiproliferasi, antikanker, dan antimikroba. Tujuan: Penelitian ini bertujuan untuk mengetahui pengaruh ekstrak rimpang kunyit putih terhadap lipid darah pada tikus wistar dengan nefropati diabetikum.

Metode: Penelitian ini adalah penelitian eksperimental dengan rancangan the post-test only control group design. Penelitian dilakukan di Laboratorium Farmakolgi Fakultas Farmasi USU, Laboratorium Histologi Fakultas Kedokteran USU, dan Laboratorium Biomolekuler Fakultas Kedokteran UNPRI pada bulan April-Juli 2020.

Hasil: Tikus putih jantan galur wistar dibagi menjadi enam kelompok; yaitu kelompok kontrol normal (P1), kelompok kontrol negatif (P2), kelompok kontrol positif (P3), tiga kelompok perlakuan dengan kunyit putih masing-masing dengan dosis P4=100, P5=200, P6=400 mg/kgBB yang sebelumnya telah diberi diinduksi aloksan. Data dianalisis menggunakan uji One Way Anova. Terdapat perbedaan yang signifikan pada ekstrak dengan dosis 100mg/kgbb dibandingkan dengan kelompok yang lain.

Kesimpulan: Dapat disimpulkan ekstrak kunyit putih dapat menstabilkan kadar kolesterol dan trigliserida serum pada tikus model diabetes nefropati.
Risk Factors Of Complicated Pneumonia In Children
Authors: Oktafia Pratista , Prananda Surya Airlangga  , Ira Dharmawati  , Retno Asih Setyoningrum
Published: August 2021

Introduction: Pneumonia causes morbidity and mortality in children worldwide. Pediatric patients with complicated pneumonia have a poor prognosis and are more at risk of death. Objective To identify risk factors for complications in pediatric patients with pneumonia.

Method: This research was a case-control study, involving children with pneumonia aged 1-59 months in Dr. Soetomo in 2016-2020. The sample was divided into two groups. Patients who had complications at first admission were classified as a case group. Whereas patients without complications at first admission were classified as a control group. Samples for the case group were obtained by using total sampling method, while the control group employed random sampling technique. Data were collected from medical records and analyzed by chi-square test.

Result: A total of 44 case group samples and 53 control group samples were involved during this study. Among investigated variables, male gender (OR=2,842; 95% CI, 1,24-6,49) and anemia (OR=3,283; 95% CI, 1,26-8,49) might increase the risk of complicated pneumonia. Meanwhile other variables, namely age, comorbidities, birth weight, malnutrition, and immunization status did not have a significant relationship with the incidence of complications in pneumonia patients.

Conclusion: Male gender and anemia are risk of complicated pneumonia.
Agility Score of Junior Soccer Athletes in Jakarta
Authors: Regie Santoso  , Tamin Tirza Z
Published: August 2021

Introduction: Agility score is important in setting the rehabilitation’s goal of injured athlete. More agility requirement needs more rehabilitation effort. The aim of this study is to measure the agility score of junior soccer athletes in Jakarta and compare the agility score based on athlete’s playing positions.

Methods: Agility score of 65 junior athletes measured using T-Agility test. Subjects categorized based on playing positions which are defender, midfielder and forward. Mean agility score of each group was then compared. Data analyzed using descriptive analysis and one-way annova.

Results: The mean agility score is 10.89 ± 0.47 seconds. The mean agility score in defender is 11.02 ± 0.51, midfielder 10.79 ± 0.41 and forward 10.73 ± 0.47. No significance statistical difference between the three groups (p=0,70).

Conclusion: Agility score of junior soccer athletes in Jakarta using the T-Agility test is 10.89 ± 0.47 seconds and may illustrate the risk of sport injury. The forward soccer player has higher agility score compared to the midfielder and defender.
Pengelolaan Stigma COVID-19
Authors: Werdhani Retno Asti , Tambunaan Fiona , Latuasan Kitra
Published: August 2021

Virus SARS-CoV-2 yang terbilang baru ini mencetuskan berbagai permasalahan. Ketidakpahaman masyarakat terhadap penyakit ini menjadi salah satu celah sumber permasalahan yang harus dihadapi dan segera diperbaiki. Ketiadaan pemahaman yang benar mengenai pasien COVID-19 dapat menimbulkan stigma sosial. Stigma sosial dalam konteks wabah adalah pemberian label, stereotip, diskriminasi, perlakuan terpisah, dan / atau penghilangan status karena seseorang/sekelompok orang dianggap berkaitan dengan suatu penyakit. Stigma sosial yang timbul pada pandemi COVID-19 memicu perilaku diskriminatif terhadap individu yang terjangkit maupun terhadap individu yang diduga pernah melakukan kontak dengan virus ini, termasuk tenaga Kesehatan. Hal ini dapat menghambat upaya pemutusan rantai penularan Covid-19.
The Hubungan Faktor Sosial Orang Dengan HIV/AIDS Dengan Akses Pelayanan Antiretroviral Selama Pandemi COVID-19 Di Kabupaten/Kota Kediri
Authors: Sidjabat Forman Novrindo , Betty Lania Arrumasari  , Ni Putu Priyanka Ayu Ratnanggana  , Silvia Tri Ambarwati
Published: August 2021

Pendahuluan: Terjadi penurunan akses layanan antiretroviral (ARV) yang disebabkan kekuatiran ODHA terinfeksi COVID-19, anjuran karantina oleh pemerintah dan fungsi fasilitas kesehatan yang difokuskan menangani keadaan darurat COVID-19. Penelitian ini bertujuan untuk mengetahui hubungan faktor sosial orang dengan HIV/AIDS dengan akses layanan ARV selama pandemi COVID-19 di Kabupaten/Kota Kediri.

Metode: Penelitian ini menggunakan desain potong lintang dengan 107 responden. Faktor sosial meliputi variabel status hubungan, dukungan sosial, status tempat tinggal dan keikutsertaan komunitas sebaya. Variabel akses layanan ARV merupakan tindakan mengunjungi layanan ARV secara mandiri selama pandemi. Data dikumpulkan dengan teknik snowball sampling menggunakan kuesioner online dan dianalisis menggunakan uji chi-square.

Hasil: Mayoritas responden berusia 26-35 tahun (57,9%), berjenis kelamin laki-laki (56,1%), dan berorientasi heteroseksual (74,8%). Variabel yang memiliki hubungan bermakna dengan akses layanan ARV meliputi status hubungan (p<0,05), dukungan sosial (p<0,05), dan status tempat tinggal (p<0,05). Sedangkan tidak ditemukan hubungan yang bermakna antara variabel keikutsertaan komunitas sebaya dengan akses layanan ARV (p=0,69).

Kesimpulan: Ada hubungan faktor sosial meliputi status hubungan, dukungan sosial, dan status tempat tinggal orang dengan HIV/AIDS dengan akses layanan ARV selama pandemi. Perlu dilakukan pelibatan dan penguatan peran sosial masyarakat terkhusus keluarga dengan memberikan pelatihan dan edukasi terkait pemahaman tentang HIV/AIDS, kebutuhan dan motivasi ODHA.
Preparing Returning Workplaces for COVID-19: An Occupational Health Perspective
Authors: Mikhael Yosia  , Nuri Purwito Adi
Published: August 2021

With the COVID-19 pandemic continuing and the resulting economic burden increasingly apparent, the Indonesian government began to prepare a "new normal" phase and make peace with COVID-19. From this new decision arises the question of the readiness of businesses and the industrial sector to resume operations amid COVID-19. This article aims to provide concise and precise information about the preparations that can be made by businesses to operate safely amid COVID-19 based on existing scientific studies and literatures. From the literature visits it can be concluded that transmission and danger of a COVID-19 pandemic can be prevented through: creation of infectious disease prevention and response plan, implementing basic infection prevention measures, policies and procedures for proper identification and isolation of sick people, applying flexibilities in policies, and protections in the workplace.
Laporan Kasus: Ventilator Non-Invasif sebagai Salah Satu Alternatif dalam Memperbaiki Gerakan Diafragma, Arus Puncak Ekspirasi dan CO2 Akhir Ekspirasi Pasien Tuna Laring
Authors: Siti Chandra Widjanantie  , Ferius Soewito
Published: August 2021

Pasien tuna laring dapat memiliki masalah pada komplians paru karena beban pada diafragma yang meningkat, Hal tersebut dapat mengakibatkan CO2 end-tidal yang meningkat. Pemberian Non-invasive ventilator (NIV) diperkirakan dapat meningkatkan komplians paru, dan pada akhirnya memperbaiki CO2 end-tidal. Serial kasus ini dibuat untuk melaporkan efek NIV pada beberapa parameter fungsi paru. Dilaporkan tiga kasus dengan tuna laring. Masing-masing dicatat riwayatnya dan keluhan saat itu.Selain itu diukur gerakan diafragma pada saat inspirasi dan ekspirasi dengan memakai ultrasonografi, arus puncak ekspirasi dan CO2 end tidal. Pengukuran dilakukan sebelum dan setelah diberikan NIV. Seluruh pasien menunjukkan adanya perbaikan pada gerakan diafragma dan CO2 end tidal. Satu pasien menunjukkan penurunan arus puncak ekspirasi. Secara klinis NIV dapat memberikan hasil yang baik pada komplians diafragma dan CO2 end-tidal. Efek NIV pada arus puncak ekspirasi tidak terlihat konsisten. Perlu penelitian labih lanjut untuk menentukan apakah NIV dapat memberikan efek positif secara signfikan pada pasien tuna laring.
A Justificação das Operações Algébricas na Inglaterra do Século XVII a XIX – O Caso das Quantidades Negativas
Authors: Salazar Michel Santos , Schubring Gert
Published: August 2021

O período de XVII a XIX abarcou uma forte discussão sobre os fundamentos da álgebra e questionamentos sobre a legitimidade de quantidades negativas e imaginárias, que eram comumente chamadas de “absurdas” ou “ininteligíveis”. A discussão, motivada pelo estabelecimento da álgebra como uma ciência de conhecimento certo, acabou trazendo interessantes movimentos entre algebristas britânicos, com a virada das abordagens analíticas para as sintéticas e finalmente com o surgimento da chamada álgebra simbólica. A presente pesquisa pretende analisar algumas dessas diferentes concepções de álgebra, com foco na maneira como eram introduzidas e justificadas as quantidades negativas e as operações básicas que as envolviam.
FELIX KLEIN: Visões de Matemática, Aplicações e Ensino
Authors: Oliveira Davidson Paulo Azevedo
Published: August 2021

Ensaio/ Resenha TOBIES, Renate. 2019. Felix Klein: Visionen für Mathematik, Anwendungen und Unterricht. Springer Spektrum– Verlag. 574 páginas.
Editorial - UBIRATAN D’AMBROSIO (1932–2021) – IN MEMORIAM
Authors: Nobre Sergio Roberto
Published: August 2021

No dia 12 de maio de 2021, Ubiratan D’Ambrosio faleceu na cidade de São Paulo – Brasil. Seus pais, Nicola e Albertina D’Ambrosio, ele Professor de Matemática e Advogado e ela Técnica em Ciências Contábeis, tiveram três filhos e, embora de descendência italiana, batizaram os filhos com nomes indígenas. Ubiratan, o primeiro filho do casal, Iara, a segunda filha e Ubirajara, o terceiro. Ubiratan, (Ubi, como era conhecido no meio acadêmico internacional) nasceu no dia 08 de dezembro de 1932 na cidade de São Paulo e viveu sua infância em bairros tradicionais da região central da cidade (Brás, Belenzinho e Bom Retiro).
Design and Simulation of an 8-Lead Electrical Capacitance Tomographic System for Flow Imaging
Authors: Ghaly S. M. A. , Al-Snaie K. A. , Khan M. O. , Shalaby M. Y. , Oraiqat M. T.
Published: August 2021

Electrical Capacitance Tomography (ECT) is a method for determining the dielectric permittivity distribution inside an object from measurements of external capacitance. The technique differs from conventional tomographic methods in which high-resolution images are formed from slices of the material. The measuring electrodes, which are metal plates, must be large enough to give a measurable change in capacitance. The main objective of this paper is the implementation and simulation of 8 external electrode ECT systems in order to increase the quality of reconstructed permittivity images while preserving the simplicity of design and fulfilling the demand for real-time process tomography. A complete sensor model was developed to improve the accuracy of the forward validation, especially the validation of measured data from neighboring electrodes. A prototype ECT sensor with high sensitivity was designed that can be applied to all materials which have low electrical conductivity. The capacitance between different electrode pairs is calculated for some typical permittivity distributions based on LabVIEW and MATLAB. The obtained capacitance data can be used to reconstruct images. The sensitivity distributions for the ECT sensors with different numbers of electrodes were analyzed. Preliminary tests were performed and the developed prototype showed good performance. The developed concept contributes to the study and comprehension of the ECT systems that can be used for the monitoring of oil-gas flow.
Classification of Chest X-Ray Images using Wavelet and MFCC Features and Support Vector Machine Classifier
Authors: Owida H. A. , Al-Ghraibah A. , Altayeb M.
Published: August 2021

The shortage and availability limitation of RT-PCR test kits and is a major concern regarding the COVID-19 pandemic. The authorities' intention is to establish steps to control the propagation of the pandemic. However, COVID-19 is radiologically diagnosable using x-ray lung images. Deep learning methods have achieved cutting-edge performance in medical diagnosis software assistance. In this work, a new diagnostic method for detecting COVID-19 disease is implemented using advanced deep learning. Effective features were extracted using wavelet analysis and Mel Frequency Cepstral Coefficients (MFCC) method, and they used in the classification process using the Support Vector Machine (SVM) classifier. A total of 2400 X-ray images, 1200 of them classified as Normal (healthy) and 1200 as COVID-19, have been derived from a combination of public data sets to verify the validity of the proposed model. The experimental results obtained an overall accuracy of 98.8% by using five wavelet features, where the classification using MFCC features, MFCC-delta, and MFCC-delta-delta features reached accuracy around 97% on average. The results show that the proposed model has reached the required level of success to be applicable in COVID 19 diagnosis.
The Response of a Highly Skewed Steel I-Girder Bridge with Different Cross-Frame Connections
Authors: Almoosi Y. , Oukaili N.
Published: August 2021

Braces in straight bridge systems improve the lateral-torsional buckling resistance of the girders by reducing the unbraced length, while in horizontally curved and skew bridges, the braces are primary structural elements for controlling deformations by engaging adjacent girders to act as a system to resist the potentially large forces and torques caused by the curved or skewed geometry of the bridge. The cross-frames are usually designed as torsional braces, which increase the overall strength and stiffness of the individual girders by creating a girder system that translates and rotates as a unit along the bracing lines. However, when they transmit the truck’s live load forces, they can produce fatigue cracks at their connections to the girders. This paper investigates the effect of using different details of cross-frames to girder connections and their impacts on girder stresses and twists. Field testing data of skewed steel girders bridge under various load passes of a weighed load vehicle incorporated with a validated 3D full-scale finite element model are presented in this study. Two types of connections are investigated, bent plate and pipe stiffener. The two connection responses are then compared to determine their impact on controlling the twist of girder cross-sections adjacent to cross-frames and also to mitigate the stresses induced due to live loads. The results show that the use of a pipe stiffener can reduce the twist of the girder’s cross-section adjacent to the cross-frames up to 22% in some locations. In terms of stress ranges, the pipe stiffener tends to reduce the stress range by 6% and 4% for the cross-frames located in the abutment and pier skew support regions respectively.
A Monitoring System for Transboundary Foot and Mouth Disease (FMD) considering the Demographic Characteristics in Gairo, Tanzania
Authors: Kijazi A. , Kisangiri M. , Kaijage S. , Shirima G.
Published: August 2021

Foot and Mouth Disease (FMD) is present in many countries, including Tanzania. Gairo is among the districts that frequently face FMD. This study found that the current mechanism for communicating FMD in Gairo district suffers from a long chain of information flow that causes delay and insufficient information for FMD control. Therefore, this study aimed to explore the implementation of an information system named "Monitoring System for Transboundary Foot and Mouth Disease," developed purposely to provide a standard platform for communicating FMD between livestock keepers and other stakeholders in the district. The system enables timely sharing of FMD events such as outbreaks, precaution measures, clinical signs, and negative impacts using Short Message Services (SMS), Unstructured Supplementary Service Data (USSD), and Voice Calls (robo-calls) through the mobile phones. Also, livestock keepers may report FMD outbreaks direct to the system using feature phones. The Statistical Package for Social Sciences (SPSS) was used to analyze data and Microsoft Visio was used for drawing the system architecture and information flow diagram. Finally, the system was implemented using PHP hypertext processor, JQuery, HTML, JSON, JavaScript, MySQL, and Apache webserver.
The Influence of Bath Temperature on the Properties of SILAR Deposited Cobalt Selenide Thin Films
Authors: Ho S. M. , Anand T. J. S.
Published: August 2021

In this paper, cobalt selenide thin films have been deposited onto glass slides with the SILAR method under various bath temperatures. The structure, optical properties, and morphology of thin films were investigated. The X-ray diffraction patterns confirmed that the number of peak intensities increased with increasing bath temperature. From the AFM images, bigger sizes and thicker films were observed for the films prepared at 80°C. The average grain size was estimated to be 0.2µm, 0.15µm, and 0.25µm when the bath temperature was 40°C, 50°C, and 80°C respectively. The highest absorbance value was observed for films prepared at 80°C. The band gap values range from 2eV to 2.4eV.
Development of a Sensor-Based Heartbeat and Body Temperature Monitoring System for Remote Chronic Patients
Authors: Obira J. O. , Sinde R.
Published: August 2021

The growing number of chronic diseases have stretched the healthcare sector. Globally, more than 36 million deaths per year are attributed to chronic disease complications. This has increased the demand for telemedicine in managing chronic patients as they must be on continuous monitoring for a long time. The involvement of wireless sensor networks and cloud computing technology in the health sector is increasing due to the potential it possesses in remote sensing and monitoring applications. This paper presents a developed system prototype for monitoring the heartbeat rate and body temperature of chronic patients using sensors. The monitored data are sent to a cloud database in real-time via an internet connection using the ESP8266 wireless module. The approach involves connecting a heart pulse sensor, an MLX90614 contactless temperature sensor, and the ESP8266 module to the Arduino development board. The goal of this work is to create a system that interfaces chronic patients and medical personnel in an attempt to avert the effects of insufficient health facilities, especially in rural Africa. The patient’s data in the cloud database can also be retrieved by medical personnel anytime in order to track the patient’s conditions and to advise the patient accordingly. The sensed heartbeat and body temperature readings were processed, sent, and recorded in the cloud database effectively.
Estimation of Traffic Occupancy using Image Segmentation
Authors: Farooq M. U. , Ahmed A. , Khan S. M. , Nawaz M. B.
Published: August 2021

Increased traffic flow results in high road occupancy. Traffic road occupancy is often used as a parameter for the prediction of traffic conditions by traffic engineers. Although traffic monitoring systems are based on a large number of technologies, challenges are still present. Most of the methods work efficiently for free-flow traffic but not in heavy congestion. Image processing techniques are more effective than other methods, as they are based on loop sensors and detectors to monitor road traffic. A huge number of image frames are processed in image processing hence there is a need for a more efficient and low-cost image processing technique for accurate vehicle detection. In this paper, a novel approach is adopted to calculate road occupancy. The proposed framework has robust performance under road conjunction and diverse environmental conditions. A combination of image segmentation threshold technique and shadow removal technique is used. The study comprised of segmenting 1056 images extracted from recorded videos. The obtained results by image segmentation were compared with traffic road occupancy calculated manually using Autocad. A final percentage difference of 8.7 was observed.
Performance Evaluation of RSA-based Secure Cloud Storage Protocol using OpenStack
Authors: Hyder M. F. , Tooba S. , Waseemullah .
Published: August 2021

In this paper, the implementation of the General Secure Cloud Storage Protocol is carried out and instantiated by a multiplicatively Homomorphic Encryption Scheme (HES). The protocol provides a system for secure storage of data over the cloud, thereby allowing the client to carry out the operational tasks on it efficiently. The work focuses on the execution of five major modules of the protocol. We also evaluate the performance of the protocol with respect to the computation cost of these modules on the basis of different security parameters and datasets by conducting a series of experiments. The cloud was built using OpenStack and the data were outsourced from the client’s system to the cloud to study the security features and performance metrics when adopting the cloud environment.
Examination of the Chance Constrained Optimal WT Penetration Level in Distorted Distribution Network with Wind Speed and Load Uncertainties
Authors: Barutcu I. C.
Published: August 2021

Harmonic penetration can be problematic by the growing interconnection of Wind Turbines (WTs) in distribution networks. Since the active power outputs of WTs and loads in the distribution system have uncertainties, the optimal WT penetration level problem can be considered to have a stochastic nature. In this study, this problem is taken into account in the stochastic optimization method with the consideration of uncertainties in wind speed and distribution network load profile. Chance constraint programming is taken into account in the determination of optimal WT penetration levels by applying the Genetic Algorithm (GA) along with Monte Carlo Simulation (MCS). The harmonic power flow analysis based on the decoupled harmonic load flow approach is employed in the distorted distribution network. Chance constraints are considered for the harmonic issues such as the Total Harmonic Distortion of Voltage (VTHD), Individual Harmonic Distortion of Voltage (VIHDh), and Root Mean Square of Voltage (VRMS).
Compressive Strength Studies on Recycled Binder Concrete
Authors: Nguyen D. D. , Phan V. T.
Published: August 2021

Recycled materials are gradually utilized in concrete. This paper examines the use of recycled binder in concrete. The compressive strength tests on concrete incorporating recycled binder instead of cement were carried out after 7, 14, and 28 days of curing. Cement was replaced by the recycled binder in ratios of 10%, 20%, and 30% by weight. The results show that the compressive strength of concrete is strongly affected by the percentage of the recycled binder. It has been found that the compressive strength decreases linearly with the increasing content of recycled binder. The recycled binder does not affect the strength development of concrete. In order to apply recycled waste to concrete as a binder, it is necessary to perform supplement research with appropriate additives to compensate for the loss of the compressive strength.
Smoothing the Power Output of a Wind Turbine Group with a Compensation Strategy of Power Variation
Authors: Chung P. D.
Published: August 2021

This paper proposes a new scheme to reduce the output power variation range of a wind turbine group without an energy storage system. This proposal is based on the active power compensation principle for each wind turbine. In this research, the wind turbine operates in the active power control mode. The reference active power is calculated in such a way that it compensates for the difference between the average output power and the actual output power. To verify and evaluate the proposed method, we simulated a group of two 1.5MW-wind turbines in the Simulink environment of MATLAB. Simulation results were compared to the ones of a wind turbine group without any smoothing scheme and the ones of the same group with the Exponential Moving Average method. From this comparison, we can conclude that with the proposed method, the actual output power of the wind turbine group becomes smoother than that of the wind turbine group without any smoothing scheme. Moreover, the performance of the wind turbine group with the proposed method is better than that of the wind turbine group with the Exponential Moving Average method.
In-silico Study of the Developed Hydroxychloroquine-based ACE2 Inhibitor Molecules Against COVID-19: Molecular Modeling and Docking
Authors: Zaher K. , Masango N. E. , Sobhi W. , Kanouni K. E. , Semmeq A. , Benguerba Y.
Published: August 2021

In the present study, we will verify the action of hydroxychloroquine-based derivatives on ACE2 which is considered to be the main portal of entry of the SARS-CoV-2 virus and constitutes an exciting target given its relative genetic stability compared to viral proteins. Thus, 81 molecules derived from hydroxychloroquine by substitutions at 4 different positions were generated in-silico and then studied for their affinity for ACE2 by molecular docking. Only 4 molecules were retained because of their affinity and bioavailability demonstrated by molecular dynamics and molecular docking calculations using COSMOtherm and Materials Studio software.
An Edge – IoT Framework and Prototype based on Blockchain for Smart Healthcare Applications
Authors: Al-Shammari N. K. , Syed T. H. , Syed M. B.
Published: August 2021

The Internet of Things (IoT) and the integration of medical devices perform hand-to-hand solutions and comfort to their users. With the inclusion of IoT under medical devices a hybrid (IoMT) is formulated. This features integrated computation and processing of data via dedicated servers. The IoMT is supported with an edge server to assure the mobility of data and information. The backdrop of IoT is a networking framework and hence, the security of such devices under IoT and IoMT is at risk. In this article, a framework and prototype for secure healthcare application processing via blockchain are proposed. The proposed technique uses an optimized Crow search algorithm for intrusion detection and tampering of data extraction in IoT environment. The technique is processed under deep convolution neural networks for comparative analysis and coordination of data security elements. The technique has successfully extracted the instruction detection from un-peer source with a source validation of 100 IoT nodes under initial intervals of 25 nodes based on block access time, block creation, and IPFS storage layer extraction. The proposed technique has a recorded performance efficiency of 92.3%, comparable to trivial intrusion detection techniques under Deep Neural Networks (DNN) supported algorithms.
Developing STEAM Educational Scenarios in Pedagogical Studies using Robotics: An Undergraduate Course for Elementary School Teachers
Authors: Xefteris S.
Published: August 2021

In recent years we have observed a clear trend for the transformation and evolution of teaching practices using Information and Communication Technologies (ICT) and in particular educational robotics. As modern society gives great importance to scientific and technological literacy and new technologies, the educational process must play a central role in the development of the respective skills. Thus, the training of future teachers in corresponding fields is especially important. In this paper, we present the curriculum design of a course named "S.T.E.A.M Teaching Scenarios using Educational Robotics" implemented for undergraduate pre-service teachers at the Elementary Education Department of the University of Western Macedonia in Florina, Greece. The objectives of the course include the development of critical and computational thinking, familiarity with robots, and the process of their integration in curricula focusing on interdisciplinary practices facilitated by embodied learning affordances.
A Techno-Economic Viability Analysis of the Two-Axis Tracking Grid-Connected Photovoltaic Power System for 25 Selected Coastal Mediterranean Cities
Authors: Kassem Y. , Gökçekuş H. , Lagili H. S. A.
Published: August 2021

Generating energy from renewable sources, particularly solar energy, offers significant benefits and achieves a more clean and sustainable development. In the present paper, the potential of developing a 4.2kW grid-connected rooftop two-axis tracking PV system in 25 selected coastal Mediterranean cities located in different Arabic countries is evaluated using RETScreen software. The proposed system is serving the basic household energy needs according to the load profile from monthly electrical bills. It is found that the proposed system produces about 8824kW annually, which helps to reduce CO2 emissions. Also, the average energy production cost is assumed to range from 0.0337 to 00.0475$/kWh. It is concluded that the proposed system can provide an effective solution for energy poverty in developing regions with a very positive socio-economic and environmental impact. The small-scale grid-connected PV system will provide the domestic energy needs at a lower energy production cost than the electricity price grid-connected consumers pay. This study demonstrated that generating electricity from solar energy will help reduce the electricity tariff rates and the dependence on fossil fuels.
An Optimal Fuzzy Logic-based PI Controller for the Speed Control of an Induction Motor using the V/F Method
Authors: Mugheri N. H. , Keerio M. U.
Published: August 2021

The Induction Motor (IM) is popular because of its low price, higher efficiency, and low maintenance cost. A comparative analysis of IM speed controllers using Voltage/Frequency (V/F) control or Scalar Control (SC) is presented in this paper. SC is commonly used due to its ease of implementation, simplicity, and low cost. To decrease the difficulty and cost of hardware implementation, this paper proposes an optimal Fuzzy Proportional Integral (Fuzzy-PI) controller. Firstly, the speed of IM using the V/F control technique is discussed. Then, speed control of IM using a conventional PI controller is performed. Finally, a simplified-rules Fuzzy-PI controller is developed in MATLAB/SIMULINK and its performance is compared with that of open-loop SC and the traditional PI controller. The performance of the simplified-rules Fuzzy-PI controller is superior to that of an open-loop constant V/F control and a conventional PI controller.
Intersystem Interference Study between Medical Capsule Camera Endoscopy and Other Systems in Co-Channel and Adjacent Bands
Authors: Shamsan Z. A. , Almuhanna K.
Published: August 2021

The Ultra-High Frequency (UHF) band occupies a very vital region in the spectrum and is becoming very congested because many applications use it. The capsule camera (CapCam), an ultra-low power wireless device, is a Short Range Device (SRD) application that utilizes the UHF spectrum for medical endoscopy and it is designed to operate at the 430-440MHz frequency band range. This study will focus on the interference between the CapCam and other systems operating in the frequency of 435MHz and adjacent bands. Other systems that can operate in this band include non-specific SRD and radiolocation services such as airborne radar and ground radar stations. The Minimum Coupling Loss (MCL) method is implemented in this study. The findings showed that restricted distances between the CapCam and other services must be considered when the CapCam is in use. This should be done to avoid harmful interference from the CapCam especially in the case of radiolocation services.
Analysis of the Wavelet Domain Filtering Approach for Video Super-Resolution
Authors: Daithankar M. V. , Ruikar S. D.
Published: August 2021

The wavelet domain-centered algorithms for the super-resolution research area give better visual quality and have been explored by different researchers. The visual quality is achieved with increased complexity and cost as most of the systems embed different pre- and post-processing techniques. The frequency and spatial domain-based methods are the usual approaches for super-resolution with some benefits and limitations. Considering the benefits of wavelet domain processing, this paper deals with a new algorithm that depends on wavelet residues. The methodology opts for wavelet domain filtering and residue extraction to get super-resolved frames for better visuals without embedding other techniques. The avoidance of noisy high-frequency components from low-quality videos and the consideration of edge information in the frames are the main targets of the super-resolution process. This inverse process is carried with a proper combination of information present in low-frequency bands and residual information in the high-frequency components. The efficient known algorithms always have to sacrifice simplicity to achieve accuracy, but in the proposed algorithm efficiency is achieved with simplicity. The robustness of the algorithm is tested by analyzing different wavelet functions and at different noise levels. The proposed algorithm performs well in comparison to other techniques from the same domain.
Finite Element Modeling of Shunt Reactors Used in High Voltage Power Systems
Authors: Minh T. P. , Duc H. B. , Hoai N. P. , Cong T. T. , Cong M. B. , Thanh B. D. , Quoc V. D.
Published: August 2021

Shunt reactors are important components for high-voltage and extra high voltage transmission systems with large line lengths. They are used to absorb excess reactive power generated by capacitive power on the lines when no-load or under-load occurs. In addition, they play an important role in balancing the reactive power on the system, avoiding overvoltage at the end of the lines, and maintaining voltage stability at the specified level. In this paper, an analytical method based on the theory of magnetic circuit model is used to compute the electromagnetic fields of shunt reactors and then a finite element method is applied to simulate magnetic field distributions, joule power losses, and copper losses in the magnetic circuit. In order to reduce magnetic flux and avoid magnetic circuit saturation, it is necessary to increase the reluctance of the magnetic circuit by adding air gaps in the iron core. The air gaps are arranged along the iron core to decrease the influence of flux fringing around the air gap on shunt reactors' total loss. Non-magnetic materials are often used at the air gaps to separate the iron cores. The ANSYS Electronics Desktop V19.R1 is used as a computation and simulation tool in this paper.
A Realization of Stabilizing the Output Light Power from a Laser Diode: A Practical Approach
Authors: Chughtai M. T.
Published: August 2021

Semiconductor Laser Diodes (LDs) are known for their sensitivity to variation in ambient temperature. With the rise in case temperature the threshold current of the LD increases, causing the output light power to deteriorate drastically. Therefore, it is necessary to stabilize the temperature of the diode. Various approaches could be adopted in this regard. In this paper, an active cooling approach using the temperature compensation technique has been followed and presented in the form of a full design of the circuit according to the various datasheet parameters of the LD and other components. As a result of temperature stabilization, a significant improvement in the output light power stabilization was observed and the results are presented.
Cardiac Stroke Prediction Framework using Hybrid Optimization Algorithm under DNN
Authors: Al-Shammari N. K. , Alzamil A. A. , Albadarn M. , Ahmed S. A. , Syed M. B. , Alshammari A. S. , Gabr A. M.
Published: August 2021

Heart weakness and restricted blood flow into the cavities can cause a range of strokes from mild to severe Heart strokes are primary caused due to the fat deposited on artery walls. The process reduces the intake of blood and internally causes a pseudo vacuum of air bubbles leading to a stroke which can be identified with high-end instrumentations. In this article, a detailed evaluation is processed with a Hybrid Optimization Algorithm (HOA). In the proposed technique, data are preprocessed using a label encoder and the missing values of the dataset are filled. Whale Optimization Algorithm (WOA) and Crow Search Algorithm(CSA) extract inter-connected patterns and learning features using a dedicated Deep Neural Networking (DNN) support. The proposed Hybrid Optimization Algorithm extracts features and the resultant values demonstrate a high accuracy range of 97.34%.
Improving the Performance of a Microstrip Antenna by Adding a Slot into Different Patch Designs
Authors: Hakeem M. J. , Nahas M. M.
Published: August 2021

Microstrip patch antennas are attractive for communication applications due to their small size, low cost, and easy fabrication. Regardless of the diverse usage of these antennas, their bandwidth and efficiency are still limited and need to be improved. Therefore, this paper aims to enhance the bandwidth and efficiency of a microstrip antenna by inserting a slot into various patch designs. Flame Retardant (FR4) material is used in the dielectric substrate and the antenna is fed by a microstrip line. Virtually, the antenna performance is attempted to be optimized through empirical investigations of feedline lengths, slot sizes and positions, and ground plane dimensions and locations. To achieve the results, the High Frequency Structure Simulator (HFSS) is used, and the paper concludes by showing that the antenna performance is enhanced by the slot, and the return loss is significantly reduced when the ground plane is moved to the front surface of the antenna.
Preparation and Characterization of Gelatin-Based Films Cross-Linked by Two Essential Oils at Different Concentrations and Plasticized with Glycerol
Authors: El Kolli H. , El Kolli M.
Published: August 2021

Gelatin cross-linking has recently been discovered to be a very appealing method of producing gelatin-based films. The current research looks at various commercial gelatin (type B) films to improve their physical qualities. Bunium alpinum and bunium incrassatum essential oils (EOs) in two quantities (5% and 25%) were added to the films, which showed substantial biological activity (antibacterial, antioxidant, antihemolytic, and anti-inflammatory). According to electronic scanning microscopy, the basic gelatin matrix had changed and there were multiple dense spots on the cross-linked films. The particles appear to be more bonded in an isotropic form. Infrared spectroscopy cannot provide substantial accuracy on the new characteristics and chemical interactions formed due to the complex system of both gelatin and EOs. According to the UV transmission test results, adding EOs to gelatin films improves the barrier properties against UV rays and prevents UV light transmission. Finally, the swelling water test revealed that included EOs in the film composition reduce the film's swelling.
A Takagi-Sugeno Fuzzy Model for Greenhouse Climate
Authors: Haj Hamad I. , Chouchaine A. , Bouzaouache H.
Published: August 2021

This paper investigates the identification and modeling of a greenhouse's climate using real climate data from a greenhouse installed in the LAPER laboratory in Tunisia. The objective of this paper is to propose a solution to the problem of nonlinear time-variant inputs and outputs of greenhouse internal climate. Combining fuzzy logic technique with Least Mean Squares (LMS), a robust greenhouse climate model for internal temperature prediction is proposed. The simulation results demonstrate the effectiveness of the identification approach and the power of the implemented Takagi-Sugeno Fuzzy model-based algorithm.
Enhancement of Solar Cell Modeling with MPPT Command Practice with an Electronic Edge Filter
Authors: Saad S.
Published: August 2021

A new photovoltaic cell modeling based on an electronically tunable edge filter is presented in this paper. The new model is subjected to temperature, illumination, and resistance variations. In addition, an MPPT (Maximum Power Point Tracker) command was exposed with a calculation algorithm based on a microcontroller card that used the behavior of an electronically tunable edge filter. The results confirm those published in the literature, showing the influence of the position of the leakage variation in our model, which can give more power. The simulation results show that the proposed command is efficient to determine the MPP point.