bluuebunny/crossref_metadata_2025 huggingface dataset:
Simulation of Supply Chain Resilience Model of the Pharmaceutical Industry in the Country in the Supply of Remdesivir Using System Dynamics Approach
Authors: Nooshiravani Yousef , Bazai Qasem Ali , Aligholi Mansoureh
Published: May 2022

Background: In the event of a crisis and epidemic of infectious disease, ensuring the proper and timely supply of necessary medicine is one of the main priorities of the health care system in any country. Therefore, the present study investigates the resilience of the Iranian medicine supply chain using the system dynamics simulation method in increasing the level of access to Remdesivir.
Methods: This is a development-applied study to provide a model using the system dynamics approach, which first presents a rich image that is based on the model, and then cause-effect models appropriate to the observations made. It was structured on the behavior of the system and also inspired by valid theories. The effect of key factors affecting the supply chain resilience of the country’s pharmaceutical industry was designed and analyzed using a system dynamics approach using decision support system (DSS) Vensim software. The time horizon considered for this research was 5 years, from 2019 to 2023. To predict and simulate the system dynamics model, the data collected from the questionnaires and the interviews with experts in this field were used.
Results: Based on the result of this study, it can be expected that by reducing the schedule pressure by 1 and 3 % during the time of the study, the resilience of the supply chain of remedesvir in the country upgraded to about 32% and 47%.
Conclusions: According to the complexity of health care systems, it is difficult to recognize the interaction of different variables, therefore, the effect of interventions is not immediately recognizable and requires the passage of time. In addition, the majority of the factors influencing health care outcomes are nonlinear. Therefore, the use of simulation models can help to clarify the indirect behavior of complex health care problems.
The Relationship between Antioxidants Consumption and Insulin Resistance/Insulin Sensitivity in Type 2 Diabetes without and with Coronary Stenosis: A Case-Control Study
Authors: Gerami Hadis , Jamalzehi Atena , Javadi Maryam , Hosseini Seyed Kianoosh , Lesani Azadeh
Published: May 2022

Background: Type 2 diabetes (T2D) is known as a common chronic metabolic disease worldwide. Coronary artery diseases are one of the hazardous disorders in diabetic patients. The current study aimed to investigate the relationship between dietary antioxidants intake with insulin resistance and insulin sensitivity among T2D without and with coronary stenosis (CS). Methods: This case-control study was conducted on 247 participants (65 diabetic patients suffered from CS and 172 diabetic patients without CS). Dietary antioxidants intake (vitamin E, Vitamin C, selenium, beta-carotene, and zinc) were assessed with a valid and reliable 168-item semi-quantitative food frequency questionnaire (FFQ). Blood pressure, weight, and height were measured. Blood sample was collected for glycaemic control assessment. Results: Diabetic patients with CS had significantly higher HbA1c levels (P = 0.004). There was a negative significant association between vitamin E (r = -0.91; P < 0.001) and Beta-carotene (r =-0.88; P < 0.001) with HbA1c among all participants. There was also a positive significant association between vitamin E, vitamin C, and selenium with insulin sensitivity among all the participants; (r = 0.59; P = 0.004) for vitamin E, (r = 0.91; P < 0.001) for vitamin C, and (r = 0.27; P = 0.04) for Beta-carotene. Conclusion: Antioxidants intake especially vitamin C and beta-carotene may have an anti-insulin resistance effect in metabolic disorders.
Study of Antioxidant Effects of Alcoholic Extract of Mentha longifolia on Fat Oxidation of High-Consumption Meat Products in Tabriz
Authors: Hejazy Marzie , Abdollahzadeh Marjan , Javid Farzin
Published: May 2022

Background: Fat peroxidation is one of the problems in food processing, cooking, and storage. Oxidative changes cause pathological effects in biological systems and reduce the taste and quality and ultimately spoil food. Using aromatic plants and vegetables with antioxidant properties can play an important role in preventing these adverse effects. The antioxidant effects of Mentha longifolia have been considered in recent years.This study aimed to investigate the antioxidant activity of the peppermint plants and determine its protective effect on lipid oxidation of high-consumption meat products in Tabriz. Methods: To this end, aqueous-alcoholic extract of mint leaves and twigs with concentrations of 0.1%, 1%, 5% with homogeneous mixtures of 10%, 90% meat hamburger products, and 45% sausages were exposed. Lipid oxidation was measured by measuring malondialdehyde using the TBARS method on day 0 and after 42 days of exposure to peppermint extract at 0-4 °C and was compared with the control group. Results: The results showed that increasing the shelf life of meat mixtures significantly increases fat peroxidation (P = 0.05). Also, increasing the concentration of peppermint extract in meat solution samples significantly reduces the amount of malondialdehyde (P = 0.05). The results showed the antioxidant activity of peppermint during the storage time of meat products and its benefits can be used in the food industry. Conclusion: The present study showed that peppermint extracts have strong antioxidant activity and can be used in food and biological systems and can be used as a substitute for synthetic antioxidants to reduce their harmful effects on health.
Perceived Barriers and Facilitators to Dairy Consumption among School-Age Children: A Qualitative Study
Authors: Amini Maryam , Doustmohammadian Azam , Rabiei Samira , Bazhan Marjan , Abtahi Mitra
Published: May 2022

Background: To improve dairy consumption among children, it is crucial to explore probable barriers and facilitators toward it. The current qualitative study aims to discover barriers and facilitators of dairy intake among school-age children in Tehran to suggest strategies to improve it based on the optimal components of social marketing. Methods: In a qualitative study, 111 school-age children (mean age 10.08±0.57 years) were selected by purposive sampling with maximum diversity from primary schools in three areas of Tehran. Sixteen focus group discussions (FGDs) were separately conducted among students in different grades. Contents of the FGDs were analyzed using MAXQDA 2010. Results: Food and nutrition literacy, improvement of attitude and trust-building, training taste and food preferences were the main facilitators to increase dairy products among school-age children. Barriers related to dairy products consumption included negative attitudes toward dairy products, unsound tastes, and unhealthy food preferences. The main suggested strategies to increase dairy consumption were improvement of the products' sensory and non-sensory characteristics, providing the milk and dairy products consumption experience for free, improvement of the quality of preserving places, enhancing physical and economic availability of dairy products. Dairy stores and school buffets were mentioned as the best places for supply. Encouragement and motivation, education and information, modeling and promoting appropriate culture were suggested as the main promotion strategies. Conclusion: To provide practical strategies for increasing dairy consumption among children, the perceived barriers and facilitators mentioned by them should be addressed.
Food Safety and Hygiene Knowledge and Attitudes among the Health-Care Staff in the Southeast Area of Iran
Authors: Eslami Hadi , Nasirzadeh Mostafa , Nabizadeh Firozeh , Salari Mahnaz , Alinaghizadeh Zahra
Published: May 2022

Background: This study aimed to determine the level of knowledge and attitude towards food safety and hygiene among the health-care staff in Rafsanjan University of Medical Sciences, Iran. Methods: This survey-descriptive was conducted on 101 staff working in primary health-care centers of Rafsanjan University of Medical Sciences who were selected taking a census. Data collection was also performed by a researcher-made questionnaire. Results: The results showed that the mean score of knowledge and attitude of the staff was 13.36 ± 2.44 and 37.19 ± 3.74, which obtained 70.31% and 74.38% of the total score, respectively. The lowest level of knowledge towards food safety and hygiene among the staff was about the reuse of foods, such as cheese (solid), jam, yogurt, tomato paste (liquid), as well as the need to store some foods refrigerated. The mean score of knowledge in the subjects with a history of food poisoning was also lower, which was statistically significant (P = 0.03). The most common wrong attitudes among the staff included rinsing vegetables in sufficient water (85.1%), putting raw and cooked foods together (82.2%), and using foods in bulging cans (75.2%). However, the staff’s attitudes regarding personal hygiene were appropriate. Conclusion: Finally, education about correct food storing and reusing, correct washing and consuming of raw foods and vegetables is recommended.
The Role of Spinopelvic Parameters in Total Hip Arthroplasty: A Current Concept Review
Authors: Moazen Jamshidi Mir Mansour , Moharrami Alireza , Mirghaderi Seyed Peyman , Sharifpour Sadula , Mafi Amir Reza , Mortazavi Seyed Mohammad Javad
Published: May 2022

The spine, pelvis, and hip are three anatomic structures that tightly interact to create spinopelvic mobility and harmony. Orthopaedic surgeons, both spine and hip specialists, must have a complete awareness of this concept. Recently, the literature has placed great emphasis on paying attention to these parameters in the preoperative planning of the total hip arthroplasty (THA). We could distinguish between balanced and unbalanced pelvis and spine with spinopelvic parameters and therefore, we could diagnose the spinopelvic stiffness that is important in preventing complications following THA. This review briefly introduces the importance of spinopelvic parameters and their critical role in THA outcome. Treatment algorithms are also provided based on the most recent studies.
Mortality Rate and Quality of Life in Patients with Intertrochanteric Fractures Treated with Dynamic Hip Screw
Authors: Shafiei Seyyed Hossein , Ghaderzadeh Sina , Rastegar Mohammad , Siavashi Babak , Golbakhsh Mohammadreza , Mortazavi Seyyed Mohammad Javad
Published: May 2022

Background: Intertrochanteric (IT) fracture is one of the most common fractures in adults. Dynamic hip screw (DHS) surgery is a surgical procedure for IT fracture treatment. This study evaluated the mortality rate and quality of life (QOL) among these patients one year after the surgery.
Methods: This cohort study was conducted on 110 patients with IT fractures treated with DHS from 2017 to 2019. A questionnaire was completed for each patient before, during, and after surgery. Preoperative information included demographics, height, weight, body mass index (BMI), smoking, diabetes, variables such as IT fracture classification, injury mechanism, lateral wall, and the American Society of Anesthesiologists (ASA) comorbidity classification. Tip-apex distance (TAD), nail position at the femoral head, and the amount of bleeding during the operation were achieved during and immediately after the surgery. The mortality rate was determined one year after the surgery, and the surviving patients were assessed by the 36-Item Short Form Survey (SF-36) questionnaire.
Results: The mortality rate among patients who underwent DHS was 31.81%. There was no significant difference between living and dead patients regarding demographic information, surgical techniques, and comorbidities. There was no association between patients regarding the average of all areas of physical, mental, and overall health and gender. There was no significant relationship between the mean of physical and mental health with the duration of hospital stay and the amount of bleeding during surgery. A history of diabetes, high blood pressure, and smoking in these patients was not associated with mortality and QOL.
Conclusion: The patient’s age is the most important risk factor for mortality after the DHS surgery.
Surgical Treatment of Chronic Traumatic Rupture of the Flexor Digitorum Profundus Tendon in a 9-Years-Old Female: A Case Report
Authors: Kargar Mohammadreza , Sadeghi Ali , Montazeri Seyed Mohammad Hashem
Published: May 2022

Background: Flexor tendon rupture is a common traumatic event that is treated with surgery. Delay in reconstruction can reduce the chances of successful treatment even the surgeon is forced to choose fuse surgery.
Case Report: The study case was a 9-year-old girl who presented after months of traumatic injury with severe deformity of index finger and shortened flexor digitorum profundus (FDP). Although there was no suitable tendon, a plantaris tendon graft was prepared from her left leg. After one year, the range of motion (ROM) in the left hand was normal beyond expectation.
Conclusion: Single-stage tendon graft repair surgery even in chronic cases with shortened tendon and severe deformity is a good method which is recommended for similar patients, especially in children.
Intrapelvic Migration of Dynamic Hip Screw Postoperatively Leading to Total Hip Arthroplasty: A Case Report
Authors: Moazen Jamshidi Mir Mansour , Moharrami Alireza , Tabatabaei Irani Pouya , Ghasemi Mohammad Ali , Mafi Amir Reza , Mortazavi Seyed Mohammad Javad
Published: May 2022

Background: This study aimed to present a rare case of a failed dynamic hip screw (DHS) used for fixation of intertrochanteric fracture sliding into the pelvis and to review the most common causes of DHS failure in order to prevent this from happening in the future.
Case Report: A 68-year-old woman was referred to the orthopedics clinic with left hip pain and limping from 6 months ago. In our evaluation, she had DHS failure and intrapelvic protrusion.
Conclusion: There have been several aspects of the previously described DHS failure. We performed a two-stage total hip arthroplasty (THA) for the patient with a good one-year follow-up in the present case.
Effects of Iron Sucrose and Erythropoietin on Transfusion Requirements in Patients with Preoperative Iron Deficiency Anemia Undergoing on-Pump Coronary Artery Bypass Graft
Authors: Jafari Shima , Talasaz Azita H , Salehiomran Abbas , Ariannejad Hamid , Jalali Arash
Published: May 2022

Background: Preoperative anemia is an independent risk factor for higher rates of blood transfusion in cardiac surgery. This study aimed to evaluate the effects of intravenous iron sucrose and erythropoietin on transfusion requirements in patients with preoperative iron deficiency anemia (IDA) undergoing on-pump coronary artery bypass graft (CABG) surgery.
Methods: In this open-label, randomized clinical trial, patients with preoperative IDA who were candidates for on-pump CABG were randomized into intervention (iron plus erythropoietin) or control groups. Iron sucrose was administered as a 200 mg intravenous dose and erythropoietin as a 100 IU/kg bolus 1 to 2 days before surgery. The primary outcome was the amount of blood transfusion during the first 4 postoperative days.
Results: The study population consisted of 114 patients. The mean age was 64.11±8.18 years in the intervention group and 63.35±8.70 years in the control group. Twenty-seven patients (47.4%) in the intervention group and 25 (43.9%) in the control group were males. The number of red blood cell units transfused per patient exhibited a significant fall in the intervention group compared with the control group (P˂0.001). The ferritin level showed a significant rise in the intervention group on postoperative day 7 (P=0.027). The length of stay in the intensive care unit and the hospital was significantly lower in the intervention arm (P=0.041 and P=0.006, respectively). No adverse events were reported in both groups.
Conclusion: The use of erythropoietin and iron sucrose 1 to 2 days before surgery significantly decreased the need for blood transfusion in patients with IDA undergoing CABG without any significant adverse events.
Is Left Innominate Vein Ligation during Aortic Arch Surgery Always Safe? A Case Report
Authors: Schizas Nikolaos , Patris Vasilios , Samiotis Ilias , Nikoli Eleni , Lama Niki , Argiriou Michail
Published: May 2022

Ligation of the left innominate vein (LIV) expands the surgeon’s surgical field for ascending aorta and aortic arch procedures. Although it is considered a safe technique by most surgeons in that it is associated with only minor drawbacks, conflicting views exist regarding this method. We herein describe a 70-year-old woman who underwent ascending aorta replacement due to an aneurysm with subsequent cerebral dysfunction caused by extended brain edema, possibly related to LIV ligation, leading to her death.
Prenatal Diagnosis of a Rare Case of Double-Outlet Right Ventricle with Tricuspid Atresia
Authors: Golbabaei Alireza , Majnoun Mohamad Taghi , Aghaei Moghadam Ehsan , Rastgar Azade , Naemi Mahsa
Published: May 2022

The article's abstract is not available.
PROBLEM OF EXCLUDING A PARTICIPANT OF A BUSINESS COMPANY
Authors: Isayevа K. O.
Published: May 2022

Corporate legal relations may be terminated voluntarily or non-voluntarily. Since Ukrai­nian corporate law has been significantly amended recently, there has emerged the need to re-think the legal mechanism of the grounds for terminating corporate legal relations non-voluntarily for a member. This research considers the problem of exclusion of a member of a business company, identifies gaps and inaccuracies in the legal regulation of this issue in the current legislation of Ukraine.
The study considers three reasons for expelling a member of corporate legal relations, which are applied in the national and foreign legislation. While analyzing the theoretical and practical aspects of the exclusion of a participant due to systematic non-fulfillment or improper fulfillment of his duties or obstruction by his actions of the goals of the society, which until 2018 was provided for in Art. 64 of the Law of Ukraine “On Business Companies” for lim­ited liability companies, the experience of foreign countries in implementing such a rule was considered, as well as the decision of the Supreme Court to appeal the decisions of the general meeting on exclusion. Since the previous version of these expulsion grounds implied the rel­evant decision to be passed by the general meeting and the application of judgments only, the conclusion was made on the need to provide in the Law of Ukraine on Limited and Additional Liability Companies for the possibility of initiating the expulsion under the legal action brought by the entity member, and not under the decision of the entity general meeting due to the sys­tematic non-performance or underperformance of their obligations or their interference in the entity pursuing its goals.
Considering the issue of expelling a deceased member of a limited liability company, the conclusion was made on the inappropriateness of applying the term of expulsion to a deceased member, since the point is in excluding the deceased member and the data on him/her from the public register. Hence, respective rewording is required in the existing legislation to avoid any misrepresentations.
The position was established on the ways of solving the topical issues, emerging while expelling a member of an entity based on different grounds.
A Learning Analytics Approach to Monitoring the Quality of Online One-to-One Tutoring
Authors: Cukurova Mutlu , Khan-Galaria Madiha , Millán Eva , Luckin Rose
Published: May 2022

One-to-one online tutoring provided by human tutors can improve students’ learning outcomes. However, monitoring the quality of such tutoring is a significant challenge. In this paper, we propose a learning analytics approach to monitoring online one-to-one tutoring quality. The approach analyzes teacher behaviours and classifies tutoring sessions into those that are effective and those that are not effective. More specifically, we use sequential behaviour pattern mining to analyze tutoring sessions using the CM-SPAM algorithm and classify tutoring sessions into effective and less effective using the J-48 and JRIP decision tree classifiers. To show the feasibility of the approach, we analyzed data from 2,250 minutes of online one-to-one primary math tutoring sessions with 44 tutors from eight schools. The results showed that the approach can classify tutors’ effectiveness with high accuracy (F measures of 0.89 and 0.98 were achieved). The results also showed that effective tutors present significantly more frequent hint provision and proactive planning behaviours than their less-effective colleagues in these online one-to-one sessions. Furthermore, effective tutors sequence their monitoring actions with appropriate pauses and initiations of students’ self-correction behaviours. We conclude that the proposed approach is feasible for monitoring the quality of online one-to-one primary math tutoring sessions.
Epidemiology of Bean common mosaic virus and Alternaria alternata in 12 Phaseolus vulgaris genotypes
Authors: Gonzalez-Cruces Agustín , Arista-Carmona Esly , Díaz-Arias Karen Vianey , Ramírez-Razo Karina , Hernández-Livera Adrián , Acevedo-Sánchez Gerardo , Mendoza-Ramos Coral , Mora-Aguilera Gustavo
Published: May 2022

Research objective was to assess phytosanitary response and epidemiological behavior in 12 Phaseolus vulgaris genotypes and develop etiological-epidemiological methodologies applicable to plant breeding studies. In 2020 springsummer season, assessments were conducted at flowering (June) and fructification stages (August). Severity was evaluated with a 6-class logarithmic-diagrammatic scale setup in App-Monitor® v1.1. Genotype health was determined using an Integrated Damage Index (IDI), weighted and adjusted for disease severity and coverageplant vigor (IV), which was estimated with images (RGB, 14mpx) captured with dron-Phantom-3 at 5 m height from genotype centroid. In SAS v9.4, t-test and ANOVAs, followed by Tukey (p = 0.05), were performed for different experimental settings. Disease spatial patterns were analyzed with kriging and omnidirectional variograms in SURFER v10. Forty-three total samples were used for isolation, pathogenicity testing, and molecular identification with universal primers ITS1/ITS4, NIb2F/NIb3R, PBL1v2040/PCR1c for eukaryotes, Potyvirus and Begomovirus, respectively. Final data matrix included 22 variables, 859 observations and 18,898 metadata. Alternaria alternata and Bean common mosaic virus (BCMV) were identified in 100% of samples analyzed with 99% homology. Vaquita Negro, Garrapato and Canario were statistically the most susceptible genotypes (37.3 - 58% severity) for BCMV, while Canario and Tipo Flor de Mayo (41.4-42.7%) were for A. alternata (p = 0.05). Oti and Negro Perla had higher climatic adaptability and tolerance to both pathogens with IV > 0.7 and IDI < 0.43. Spatially, BCMV presented random dispersion of foci and a blockedge effect with continuous contagion of up to 5.6 meters. Vaquita Negro and Bayo Mecentral showed uniform virus spread, presumptively due to high viral transmissibility by seed. In contrast, except for Tipo Flor de Mayo and Canario, which exhibited significant coalescence of foci, A. alternata had spatial dependence of less than 8 plants. Wind and hail damage significantly favored A. alternata infection (p = 0.05) suggesting its opportunistic condition.
ENGINEERING PRACTICE OF SETTING A FIELD ORIENTED CONTROL SYSTEM FOR INDUCTION ELECTRIC DRIVE OF PIPELINE VALVES BASED ON EQUIVALENT CIRCUIT PARAMETERS, ESTIMATED BY FALLING PHASE CURRENT CURVE
Authors: Bunkov D.S.
Published: May 2022

To support modern requirements for an induction electric drive of pipeline valves, the most promising is the organization of a filed oriented control system, the setting of which is extremely difficult without the parameters of the equivalent circuit of an induction machine. This article provides a technique of setting a field oriented control system for induction electric drive of pipeline valves based on equivalent circuit parameters, estimated by falling phase current curve. The main aim of the research is to test the functioning of an induction filed oriented electric drive using a load stand, the setting of which is made on the basis of parameters previously estimated by falling phase current curve. Methods. To achieve the goal of the research, theoretical and experimental research methods were used. Theoretical research methods include the theory of electric drive, the theory of automatic control systems, the theory of electrical machines. Experimental research were carried out using a load stand that provides the required level of load on the shaft of the tested induction machine. Results. Suggested the technique of setting a field oriented control system for induction electric drive of pipeline valves based on equivalent circuit parameters, estimated by falling phase current curve. Relative values of deviations of current, speed and torque are obtained at the nominal level of load on the shaft of an induction machine. The applicability of the proposed technique using a loading stand was confirmed.
A Homonym Determination of Olea europaea L. by using Molecular Identification and Image Analysis
Authors: Özkaya Mücahit Taha , Beyaz Abdullah
Published: May 2022

Background: The study was conducted at the various locations in Antalya province, where the Tavşan Yüreği olive variety is registered as the Tavşan Yüreği olive variety, which is spreading especially in Kepez and Manavgat districts. Methods: The objective of this study was to determine a homonym of Olea europaea var. Tavşan Yüreği by using molecular identification and image analysis. Based on molecular analyses and morphological measurements made on collected leaf and fruit samples collected, the morphological identification method is used based on imaging techniques from high-resolution photos. Result: The results showed that, according to the molecular definition and image analysis measurements, the source of the difference between all locations, including the BATEM sample, may be genotype or phenotypic diversity within the variety.
The Impact of Dental Hypersensitivity on the Patients Quality of Life. A Questionnaire-Based study
Authors: Mihaela Stoica Alexandra , Monea Monica , Dako Timea , Elena Stoica Oana , Beresescu Liana
Published: May 2022

Introduction: Dentinal hypersensitivity is a pathological condition with an increased incidence among patients of various ages, affecting their well-being and with a common response for a wide range of treatment strategies.

The study aimed to assess the impact of teeth hypersensitivity on the quality of life, daily activities, and on the emotional status of the patients affected by it.

Method: We conducted an anonymous survey on a group of 200 patients with ages 20 and 65 years old, using a questionnaire that included 23 questions. The results were collected and statistically analyzed using the chi-square test.

Results: Out of all the patients who answered our questionnaires, 51 percent have ages between 20-25 years, 26 percent between 26-35 years, 12 percent between 36-45 years, respectively 11 percent represent patients older than 46 years. 81 percent of patients are female, and 19 percent are male. In 65 percent, the onset of dental hypersensitivity sensations is caused by the consumption of ice cream,  affecting the patients‘ lifestyle negatively. According to the study, 36 percent of patients give up on certain foods/drinks that led to the appearance of dentinal hypersensitivity sensations. Forty-one correspondents felt compelled to give up consuming cold food, and carbonated and sour drinks.

Conclusions: Dentin hypersensitivity is represented by the appearance of an uncomfortable sensation due to dentin being exposed to the exterior environment, a sensation that can range from mild irritation to severe pain and can reduce the quality of mastication and oral hygiene.
Proposal Of Optimized Solutions For Joint Use And Hybridization Of Energy Storage Systems And Combined Cycles Or Renewable Energy Plants
Authors: Rodriguez-Arango Rafael Olavarria
Published: May 2022

This article describes an electrical energy storage system with a heat pump and steam accumulators or molten salt storage, and solutions are proposed for the hybridization of this storage system with power plants, mainly combined cycle and renewable, already existing or new construction.

As a result of the development of these solutions, it is concluded that these hybridizations allow each one of the plants to operate with its nominal performance in peak hours and with a similar or higher performance in off-peak hours or periods of low prices, that is, , the electrical energy supplied to the network for each thermal or electrical kilowatt that feeds the plants is similar or higher when this electrical energy is previously stored. These high efficiencies after storage are achieved by combining heat pump performance (COP greater than 2) and Rankine cycle heat rate.

In summary, it is possible to optimize the performance of the power plants during all hours of the day and optimize costs due to the joint use of equipment and systems.

Highlights

Hybridization combined cycles, renewables and electricity storage can become a useful tool.Hybridization can optimize the joint operation of the electrical system.

Proposed hybridization achieves the same performances after storing the energy. Proposed hybridization allows sharing of equipment and systems.
“They Have to Combine the Future of the University and Their Own Future”: OpenCourseWare (OCW) Authoring as an Academic Practice in Spain
Authors: Villar-Onrubia, Ph.D. Daniel
Published: May 2022

This study looks at OpenCourseWare (OCW) in Spain, a country where most public universities have tried to promote that particular model of open educational resources (OER) provision among academics. Using three universities with varying levels of OCW activity as a case study, this article examines key drivers behind the implementation of OCW initiatives and unpacks what it means, as an academic practice, to engage in OCW authoring. Following a qualitative case study approach and a multi-methods design, this study offers a basis for theoretical generalisations that can be useful for understanding similar dynamics taking place within different organisational contexts in Spain and beyond. The findings reveal a major disconnect between the drive to implement OCW initiatives in Spain and actual opportunities for academics to engage with them as part of their work. The author concludes that the extrapolation of a highly prescriptive model of OER provision into institutional realities different from the context where it was originally devised—in this case, the Massachusetts Institute of Technology in the United States—is rather problematic. The article also provides some recommendations to university leaders and policy makers, encouraging the creation of alternative models that are mindful of the institutional and cultural specificities of their own contexts and also to take into consideration the social and material realities of the communities they aim to provide with lifelong learning opportunities.
Ukrainian E-Learning Platforms for Schools: Evaluation of Their Functionality
Authors: Zhenchenko Maryna , Melnyk Oksana , Prykhoda Yaroslava , Zhenchenko Igor
Published: May 2022

This article defines 27 criteria for evaluating the functionality of e-learning platforms, grouped into three macro groups: (a) learning management, (b) learning content management, and (c) communications and collaboration tools. The proposed criteria can be used to evaluate any e-learning platform’s functionality. They allow teachers and administrators to make conscious choices about the highest-quality e-learning platform for their schools and developers to improve e-learning platforms’ functionality. The developed criteria became the basis for rating the functionality of Ukrainian developers’ eight e-learning platforms' and determining the degree of support (in whole or partly) of e-learning components, categorized on the cognitive, social constructivist, motivation, and e-learning theories (CT, SCT, MT, and E-LT). The results indicate that the lack of communication and collaboration tools necessary to ensure quality distance learning is the main problem of Ukrainian e-leaning platforms. Comparative analysis of the functionality of e-learning platforms and components categorized on the learning theories helped determine that only three of the eight Ukrainian e-learning platforms (Accent [Mobischool], Class Assessment, My Class) fully follow the CT, SCT, and MT, but these platforms are all commercial products; therefore, they only partially support the E-LT. Solving this problem will be facilitated by developing e-learning platforms with open access, financed by the state budget in the context of the development of open and distance learning for Ukrainian students, as well as improving communication and collaboration tools in the context of conforming e-learning components to the social constructivist learning theory.
Design and Validation of the Virtual Classroom Management Questionnaire A Case Study: Iran
Authors: Keshavarz Mohsen , Mirmoghtadaie Zohrehsadat , Nayyeri Somayyeh
Published: May 2022

Effective classroom management methods are well known, but effective ways of managing classes of beginner teachers remain elusive. Classroom management refers to the wide range of skills and techniques that teachers use to ensure that classes are conducted without destructive student behavior. The present study is applied nonexperimental research. The purpose of this study was to design a tool to measure the effective management of the virtual classroom from the perspective of professors and students in e-learning and evaluate its validity and reliability. The research sample was taken randomly from all universities that make use of e-learning in Tehran, Iran, during the 2019–2020 semesters. The results show that the professional development of online classroom management is necessary for preparing teachers to teach in digital environments. The results of this research in the form of a validated questionnaire can be considered as an indicator for educators and students working in online environments, and this tool can be used for effective teaching and learning in the digital age.
Using the Critical Incident Questionnaire as a Formative Evaluation Tool to Inform Online Course Design: A Qualitative Study
Authors: Samuel Anita , Conceição Simone
Published: May 2022

The online instructor plays a prominent role in influencing how students respond to an online course, from designing the course structure, course activities, and assignments to encouraging interaction. Therefore, to develop effective online courses, instructors need robust feedback on their design strategies. Student evaluation of teaching (SET) functions as a summative evaluation of the course design and delivery. Yet, the feedback from SETs can only be integrated into the next iteration of the course, thereby failing to benefit the students who provide the feedback. One suggestion is to use midsemester formative evaluation to inform course design in real time. A qualitative research study was conducted to explore whether the Critical Incident Questionnaire (CIQ) could be an effective formative evaluative tool to inform real-time online course design and delivery. Thematic analysis was conducted on the midcourse evaluations obtained from 70 students in six fully online master’s level courses. There are three key findings from this study. First, CIQ use can provide opportunities for real-time adjustments to online course design and inform future redesign of online courses. Second, responses received via the CIQ prioritize the student voice and experience by focusing on factors that are critical to them. Finally, this deep-dive analysis reinforces the enduring factors that contribute to effective online course design and delivery. A recommendation for practice is to use the CIQ as an effective tool to gather formative feedback from students. This feedback can then be used to adjust course design as needed.
Designing Asynchronous Online Discussion Forum Interface and Interaction Based on the Community of Inquiry Framework
Authors: Hasani Lintang Matahari , Santoso Harry Budi , Junus Kasiyah
Published: May 2022

The community of inquiry (CoI) framework describes a process for creating collaborative learning through three elements or presences: social, cognitive, and teaching. Despite its popularity among researchers and practitioners, use of the CoI model is limited to mapping instructional activities, which are yet to be developed into an interaction design for online collaborative learning intended to support the CoI presences. This study was aimed at developing the interaction design of an asynchronous online discussion forum employing a user-centered design method contextualized to the learning-centered design approach. Seven scenario and user interfaces were created to facilitate one introductory activity and four phases of inquiry. The design was evaluated through contextual interviews with ten students. The interviews revealed that the prototype encouraged and supported (a) introductory activity (social presence), (b) idea exploration (cognitive presence), (c) summarizing the discussion (cognitive presence), and (d) facilitating discussion (teaching presence). Future research could be aimed at improving the proposed design based on recommendations and developing a fully functional working system to be tested in real settings.
Cross Validating a Rubric for Automatic Classification of Cognitive Presence in MOOC Discussions
Authors: Hu Yuanyuan , Donald Claire , Giacaman Nasser
Published: May 2022

As large-scale, sophisticated open and distance learning environments expand in higher education globally, so does the need to support learning at scale in real time. Valid, reliable rubrics of critical discourse are an essential foundation for developing artificial intelligence tools that automatically analyse learning in educator-student dialogue. This article reports on a validation study where discussion transcripts from a target massive open online course (MOOC) were categorised into phases of cognitive presence to cross validate the use of an adapted rubric with a larger dataset and with more coders involved. Our results indicate that the adapted rubric remains stable for categorising the target MOOC discussion transcripts to some extent. However, the proportion of disagreements between the coders increased compared to the previous experimental study with fewer data and coders. The informal writing styles in MOOC discussions, which are not as prevalent in for-credit courses, caused ambiguities for the coders. We also found most of the disagreements appeared at adjacent phases of cognitive presence, especially in the middle phases. The results suggest additional phases may exist adjacent to current categories of cognitive presence when the educational context changes from traditional, smaller-scale courses to MOOCs. Other researchers can use these findings to build automatic analysis applications to support online teaching and learning for broader educational contexts in open and distance learning. We propose refinements to methods of cognitive presence and suggest adaptations to certain elements of the Community of Inquiry (CoI) framework when it is used in the context of MOOCs.
Analysis of the relationship between COVID-19 and the stock market performance in South Africa
Authors: Mokoena Sboniso , Nomlala Bomi
Published: May 2022

The paper’s objective was to investigate the relationship between COVID-19 and South Africa financial stock markets. The pandemic worsened South Africa's unstable financial condition and societal problems: business was severely disrupted, as were the travel industry, hospitality, food security, small businesses, and many other sectors. The results show that the COVID-19 pandemic triggered high and longer-lasting financial volatility in the markets. The higher level of volatility persistence suggests a prolonged period of increased uncertainty. Overall, the uncertainty about the vaccine's effectiveness towards the pandemic provides low expectations about the future of the stock market, since there are variants that are still being discovered.
KNN FOR CLASSIFICATION OF FRUIT TYPES BASED ON FRUIT FEATURES
Authors: Azman Moh. Afis , Nafi'iyah Nur
Published: May 2022

Research related to the recognition of fruit types has been done previously. Research related to the recognition of many types of fruit applies computer vision and artificial intelligence. The purpose of this research is to apply artificial intelligence science with the KNN method to identify the type of fruit. The KNN method has a good performance in previous studies. We tried to use KNN by determining the most optimal K value. There are five types of fruit images used in this study, namely Apples, Grapes, Oranges, Mangoes, and Strawberries. The fruit image is extracted with colour, texture, and shape features with a total of 15 features, namely the average value of R, the average value of G, the average value of B, the value of skewness R, the value of skewness G, the value of skewness B, the value of grayscale entropy. , grayscale contrast value, grayscale energy value, grayscale correlation value, grayscale homogeneity value, binary area value, binary circumference value, binary major axis value, and binary minor axis value. The dataset used in this study was taken from Kaggle, with a dataset of 2750 images, each type of fruit contained 550 images, 2500 training images were used and 250 images were used for testing. The experimental results show that the KNN method with K=1 has the highest accuracy, which is 99.6%. The KNN method can be used optimally in classifying fruit types based on colour, texture, and shape features.
MEASURING BABY’S BODY LENGTH UTILIZING IMAGE PROCESSING
Authors: Putra Windy Andhika , Alfarisi Muhammad Rizqy , Hapsari Gita Indah , Periyadi
Published: May 2022

The Baby Body Length Measurement System with Machine Learning methods and Open CV library is a system designed to make it easier for Posyandu officers to take measurements of the baby's body length, where this system will measure the baby's body length using a camera, and assisted with library image processing, namely, Open CV, and to measure the length of the baby's body using Machine Learning, namely the Linear Regression method, and the measurement data will be sent to a Web application so that the baby's mother can monitor the growth and development of her baby, The system that was built has an average error of -1,42 in the condition of the lamp with a power of 40Watt and in the light of a lamp with a power of 11Watt the average error is found with a value of -15,37 and at a distance of 64 cm the system can detect objects and measure the length of the object with an average measurement error of -10,6.
IMPLEMENTATION OF THE ADDIE MODEL (ANALYSIS, DESIGN, DEVELOPMENT, IMPLEMENTATION, EVALUATION) IN PHP-BASED E-LEARNING IN THE ERA OF PANDEMIC
Authors: Rusdi Muhammad , Sirajuddin Haji , Alfah Rina
Published: May 2022

During the pandemic period at the beginning of 2020, the effects are still felt until now. All schools in Indonesia may even be closed for almost 2 (two) semesters. At times like this, every teacher inevitably is required to use E-learning without face-to-face with students. The use of various media such as Whatsapp, Zoom, Google meet and Clasromm ect is very helpful for teachers and students. In this phenomenon, we conducted research using the ADDIE Model (Analysis, Design, Development, Implementation, Evaluation) on PHP-based e-learning that we designed and created, to support the government movement that still implements distance learning more easily. With the E-Learning Application that has been created, it is very helpful for teachers, students and administrative staff in data management, especially for online learning (on the network) during this pandemic period. This PHP-based E-Learning application can be a choice of E-Learning media for schools that are still unable to do face-to-face learning directly.
METHODS COMPARISON OF ARAS AND TOPSIS FOR DETERMINING THE BEST PRACTICUM ASSISTANT (CASE STUDY CHEMICAL LABORATORY DEPARTMENT OF FMIPA UHO)
Authors: Statiswaty  , Pratiwi Ayu , Natalis Ransi
Published: May 2022

Practicum is one of the activities that are part of the curriculum in universities. The role of a practicum assistant is needed to support practicum activities. Practicum assistants is a selected through a selection process. The selection of practicum assistants at the Faculty of Mathematics dan Natural Science (FMIPA), Halu Oleo University, to be precise the department of Chemistry, is still done through a manual process. The problem faced in the selection process is that each lecturer determines the ranks of the selected practicum assistants sequentially, from the first practicum supervisor lecturer to the last, which takes a long time and subjective assessment is unavoidable. Then from that problem, it is necessary to develop a computerized system as a supporting media in decision-making to facilitate selecting practicum assistants. The Additive Ratio Assessment (ARAS) and Technique For Others Reference By Similarity To Ideal Solution (TOPSIS) method applicated to compare the results of the two ways. The results of the comparison of the two methods show that TOPSIS provides a higher accuracy value of 50%, while the accuracy value of the ARAS method is 44%, but from testing the speed of processing data, the ARAS method is faster than the TOPSIS method.
KOMIK SEJARAH BERBASIS SUMBER PRIMER INSKRIPSI YUPA: STUDI PENDAHULUAN
Authors: Azmi Muhammad , Marfuah Siti , Zulfikar Yus Rizal , Hendrina Hendrina
Published: May 2022

This study aims to obtain preliminary information used as a design basis for developing historical comics based on primary sources of Yupa inscriptions. This study uses a design research approach with the learning development method adopted from Plomp. The research results conclude that the selected Yupa encryption-based digital media development is digital comics based on analysing the media needs of three components. Material development consists of a storyline covering political life, socio-economic life, socio-cultural life, and religious life. Two characters classification appear in the comics: the main characters, such as Mulawarman, Kudunga, Aswawarman, and Brahmana, and the supporting character, like the folk characters. The landscape development of the story location consists of the river and the land.Keywords: Educational Comic; Historical Comic; Learning Media; Yupa InscriptionPenelitian bertujuan untuk mendapat informasi awal yang digunakan untuk menjadi dasar desain pada pengembangan komik sejarah berbasis sumber primer inskripsi Yupa. Penelitian ini menggunakan pendekatan penelitian desain dengan metode pengembangan pembelajaran yang diadopsi dari Plomp. Hasil penelitian menyimpulkan bahwa pengembangan media digital berbasis inkripsi Yupa terpilih adalah komik digital berdasarkan pada analisis kebutuhan media terhadap tiga komponen. Pengembangan materi direduksi menjadi sebuah storyline meliputi kehidupan politik, kehidupan sosial-ekonomi, kehidupan sosial-budaya dam kehidupan agama. Adapun karakter yang muncul dalam komik terbagi menjadi dua, yaitu karakter utama seperti Mulawarman, Kudunga, Aswawarman dan Brahmana dan karakter pendukung, yaitu karakter rakyat. Adapun latar belakang lokasi cerita (landscape) yang dikembangkan adalah lanskap sungai dan lanskap daratan.Kata Kunci: Komik Pendidikan; Komik Sejarah; Media Pembelajaran; Inskripsi Yupa