bluuebunny/crossref_metadata_2025 huggingface dataset:
To observe the changes of optic nerve sheath diameter following the use of total intravenous anaesthesia with propofol or inhalational anaesthesia with desflurane during laparoscopic surgeries
Authors: Patel Pratikkumar , Mathur Vijay , Singhal Shruti , Jethava Durga
Published: November 2021

Optic nerve sheath diameter measurement is a simple, non-invasive and yet accurate intracranial pressure (ICP) assessment technique during laparoscopic surgery. The pneumoperitoneum induced by insufflating carbon-dioxide and steep angle of trendelenburg position is associated with physiological changes resulting in increased ICP during laparoscopic surgery. We aimed to observe the changes of ONSD (surrogate marker of ICP) following the use of total intravenous anaesthesia in comparison to desflurane during laparoscopic surgery.

Patients scheduled for elective laparoscopic surgery were randomly assigned to the TIVA or DES group in this randomized study. Ultrasonographic measurements of ONSD were conducted before administration of anaesthesia (T0), 10 mins, 30 mins, 1 hr after the trendelenburg position (T1,T2,T3), 5mins after resuming the supine position (T4) and at post-anaesthetic care unit (T5). The primary outcome measure was the comparison of the mean ONSD of both the eyes of the patients of both the groups that is TIVA versus DES (inhalational anaesthetic) group.

A total of 60 patients were analysed in our study. The mean ONSD value at T1, T2, T3 and T4 (for right eye p=0.002,0.001,<0.01,0.03 respectively and for left eye p=0.004,<0.01,<0.01,0.02 respectively) were significantly lower for patients in TIVA group as compared with those in DES group.

Our result suggests that TIVA may be a better option than inhalational anaesthesia to prevent rise in intracranial pressure in patients undergoing laparoscopic surgery and preventing devastating complications caused by raised intracranial pressure in succeptible patients.
A prospective randomized clinical study to compare the efficacy of 0.25% bupivacaine with clonidine and 0.25% levobupivacaine with clonidine in supraclavicular brachial plexus block for upper limb surgeries
Authors: Abhishek R  , Aravind Arun , Shankaranarayana P
Published: November 2021

:Bupivacaine is an amide local anesthetic, available as a racemic mixture of Dextro and Levorotatory Isomers. Due to its rapid onset and longer duration of anesthesia, It is routinely preferred in various regional anesthetic techniques. However, it is associated with serious cardiovascular and neurological toxicity. Its pure S- enantiomer, Levobupivacaine having similar pharmacological profile is known to have lesser cardiovascular and CNS toxicity. Combining adjuvants like clonidine, a centrally acting partial alpha-2-adrenergic agonist to improve quality of anesthesia is common practice. Hence, the aim of our study is to compare efficacy and safety of 0.25% Levobupivacaine and 0.25% Bupivacaine when combined with clonidine in supraclavicular brachial plexus block for upper limb surgeries.

Eighty patients aged between 18 to 60 years with ASA physical status I-II, scheduled for elective upper limb surgeries under were randomized into two groups. Peripheral nerve stimulator guided Supraclavicular brachial plexus block was administered. Group BC received 30ml of 0.25% Bupivacaine plus 1µg/kg Clonidine and Group LC 30ml of 0.25% Levobupivacaine plus 1µg/kg Clonidine. The time of onset of sensory and motor block, duration of sensory and motor block, perioperative hemodynamic parameters, postoperative pain for 24hours and adverse effects were studies.

Group LC had faster onset of sensory block (p= 0.014) as well as faster onset of motor block (p= 0.012) compared to group BC. However, durations of sensory block and motor block were statistically not significant in both the groups (p>0.05). Perioperative hemodynamic parameters and assessment of pain during 24 hours of post operative period were comparable and statistically not significant.

1mcg/kg of clonidine used as an adjuvant to 30ml of 0.25% Levobupivacaine produces faster onset of sensory and motor block compared to 0.25% Bupivacaine in supraclavicular brachial plexus block. However, similar anesthetic efficacy in terms of duration of sensory and motor block, hemodynamics and postoperative analgesia were observed.
Combined popliteal and saphenous nerve block vs NSAIDS for post operative analgesia in below knee surgery patients: A cross-sectional study
Authors: Gupta Amrita , Maheshwari Shanu , Saxena Avanish Kumar , Mishra Sukhdev , Pandey Aviral
Published: November 2021

Peripheral nerve blocks are becoming increasingly popular to control postoperative pain in orthopaedic limb surgeries. An outstanding feature of nerve block is its lack of adverse effects, reduced requirement of analgesics and better patient satisfaction.

To compare the efficacy of combined popliteal and saphenous nerve block with NSAIDS for postoperative pain relief in below knee surgery patients.

We performed a prospective randomized study involving seventy patients. All patients underwent an elective orthopaedic procedure below knee under spinal anaesthesia. Thirty five patients had received a combined popliteal and saphenous nerve block and the rest thirty-five received intravenous NSAIDS at the end of surgical procedure. Post operative VAS Score, time for first rescue analgesia, total diclofenac requirement, total anti-emetic requirement and complications if any were noted.

: The statistical power of sample was 80% and type I error (α) of 0.05. The distribution of the data was evaluated using the Shapiro-Wilk test. For data with a non-normal distribution, the Mann-Whitney U test was used in intergroup comparisons. The data were expressed as the median, minimum and maximum (min-max). For comparison of postoperative analgesic use, the chi-square test was used, and complication rates were compared using a cross-ratio test. P-values less than 0.05 were considered to be statistically significant in all the analyses.

: Patients with a combined popliteal and saphenous nerve block had significantly less pain at six hours, twelve hours and twenty four hours (p value <0.001) postoperatively. Time for request of rescue analgesia was prolonged. Total diclofenac and anti emetic requirement was also reduced. Also higher level of satisfaction was achieved among this group of patients.

: A combined popliteal and saphenous nerve block provides significantly better postoperative pain relief than NSAIDS in patients who underwent below knee surgeries.
Perioperative effect of dexmedetomidine on quality of analgesia and hemodynamic parameters in vaginal hysterectomy: A tertiary centre experience
Authors: Sud Nishit , Sinha Sunil
Published: November 2021

Vaginal hysterectomy Surgery with long acting local anaesthetic like bupivacaine still requires higher doses of analgesics in the post-operative period. Dexmedetomidine is highly selective αadrenoreceptor agonist and sympatholytic drug is a useful adjunct drug in patients undergoing vaginal hysterectomy under continuous spinal epidural block (CSE). We sought to study duration of perioperative analgesia, observe the intra-operative and post-operative hemodynamic changes and post-operative sedation effect of dexmedetomidine.

: The study groups were divided as Group D (study group) administered 1 µg/kg Dexmedetomidine and Group C (control group) administered 0.9% saline drip at the rate of 1ml/kg.

Dexmedetomidine group had prolonged duration of sensory blockade, duration for 2 dermatomal regression of sensory blockade and the duration for motor block regression to Modified Bromage scale 0. This group had prolonged duration of Time to first request for rescue analgesic.14% patients required mephentermine for management of hypotension.

Intraoperative diastolic blood pressure (DBP) was lower in study group while Intraoperative Systolic blood pressure (SBP) was comparable in both the groups.

Intravenous dexmedetomidine significantly decreases the heart rate and is associated with higher incidence of bradycardia. It is effective in providing postoperative analgesia and in preventing postoperative shivering with reduced incidence of postoperative nausea and vomiting.
Effectiveness and safety of cuff inflation technique over conventional method of Magill forceps for Nasotracheal intubation under direct laryngoscopy: Randomized controlled trial
Authors: Bhayani Ami , Patwa Apeksha
Published: November 2021

The aim of the study is to compare the effectiveness and safety of cuff inflation technique over conventional method of Magill forceps for Nasotracheal intubation NTI under direct laryngoscopy.

After taking permission from institutional ethical committee, patients of 18-60 years of either sex of ASA grade I and ll were divided into groups of 40 each. In group C, cuff inflation technique and in group M, Magill forceps technique was used for navigating the endotracheal tube from oropharynx to glottic opening to achieve intubation. Parameters observed were time required for intubation, attempts of intubation, injury occurring to oropharyngeal structures during intubation and hemodynamic parameters. Cuff of endotracheal tube was assessed postoperatively for any leaksAnalysis of the data for the various parameters was done using paired t-test for intra-group comparison and student t-test for intergroup comparison and chi-square test was used for qualitative (non parametric) data.

There was no significant difference in demographic parameters, time required for intubation, number of attempts for intubation and hemodynamic parameters, but trauma to oropharyngeal structures was more in group M (8/40) compared to group C (0/40). (p≤0.05) Trauma to cuff of endotracheal tube was seen in group M (1/40) while none in group C (0/40) which was statistically not significant (p≤0.05).

Thus, Cuff inflation technique can be used as an effective alternative to Magill forceps for oropharyngeal navigation of endotracheal tube under direct laryngoscopy guided nasotracheal intubation in patients with normal airways.
Nalbuphine versus dexmedetomidine for attenuation of haemodynamic response to laryngoscopy and intubation: A randomised double blind comparative study
Authors: Rathore Akanksha , Chaudhary Sujata , Kumar Mahendra , Salhotra Rashmi
Published: November 2021

Laryngoscopy and intubation are noxious stimuli which result in marked sympathetic response. However, literature search did not reveal any study comparing nalbuphine and dexmedetomidine for attenuation of haemodynamic response to laryngoscopy and intubation.

After Institutional Ethical Committee approval and written informed consent, 80 ASA I and II patients were randomised in two groups of 40 each. Group N received 0.2 mg/kg of nalbuphine; group D received 1 µg/kg dexmedetomidine over a period of 10 min. Anaesthesia was induced as per standard general anaesthesia practice. Haemodynamic parameters [Heart Rate (HR), Systolic Blood Pressure (SBP), Diastolic Blood Pressure (DBP), & Mean Arterial Pressure (MAP)] were recorded at baseline, 0, 1, 3, 5, 10, and 15 min following intubation. Patients were also observed for any side effects of the study drugs.

There was a significant decrease (p<0.001) in mean HR in group D compared to group N, after administration of drug and 1 min after intubation. Both group N and group D showed no significant increase in mean HR at any time point compared to baseline values. There was no significant increase in mean SBP at any time interval in both the groups when compared to baseline. There was a significant increase (p<0.001) in mean DBP and MAP at the time of intubation in group N whereas no significant increase in mean DBP, and MAP was observed in group D at any time point.

Dexmedetomidine was found to be more effective in attenuating haemodynamic response to laryngoscopy and intubation as compared to nalbuphine.
Analgesic efficacy of intercostal nerve block in percutaneous nephrolithotomy: systematic review and meta-analysis
Authors: Sharma Gopal , Prasad Seema , Singh Saket , Thummala Yashasvi , Kumar Santosh
Published: November 2021

Pain is important morbidity following percutaneous nephrolithotomy (PNL). Various adjunctive procedures such as intercostals nerve block (ICNB) have been described to reduce post-operative pain. The aim of this review was to determine the analgesic efficacy of ICNB in PNL patients.

Systematic literature search was conducted to identify relevant publications. We followed preferred reporting items for systematic review and meta-analysis (PRISMA) guidelines while conducting this review.

In this review, five randomized studies with 319 patients were included. The analgesic requirement was statistically similar in ICNB and control group (Standard mean difference (SMD) -0.48 confidence interval (CI)[-1.4, 0.44] p=0.31) whereas analgesic requirement was lower for peritubal infiltration group (PTI) as compared to ICNB (SMD 0.85 CI[0.25,1.44] p=0.005). Also, time to first analgesic requirement was similar between ICNB and PTI (SMD 0.86 CI[-9.3,11.0]), p=0.87). Pain according to VAS (visual analog scale) and Dynamic VAS (DVAS) at 24 hours was lower in ICNB group as compared to the control group; however, only DVAS at 24 hours was statistically significant. DVAS and VAS at 24 hours were similar for both ICNB and PTI.

Intercostal nerve block in terms of analgesic requirement appears to be inferior to peritubal block and no better than control group. Also, mean pain scores for ICNB were similar to control group and peritubal block.
Anaesthesia management of a difficult airway patient with severe aortic stenosis for major oncosurgery
Authors: Chodankar Ninad , Kapadia Disha , Mehta Hemant
Published: November 2021

Over the past few decades, oncosurgical procedures are increasing in number, require considerable expertise and training for anaesthetising such patients. Aortic Stenosis itself poses great challenge, causes significant increase in morbidity and mortality in the perioperative period. Head, neck oncosurgical procedures with difficult airway requiring awake fiberoptic intubation in such patients adds to the challenge.

We describe once such case of previously operated Carcinoma of oral cavity with new growth involving mandible for excision of tumour with neck dissection and mandibular reconstruction with a free Fibula flap. This patient now presented with anticipated difficult airway with restricted mouth opening and a recent diagnosis of severe Aortic stenosis with mean gradient across aortic valve of 52mmHg and valve area 0.8 cm2.

Such patient requires multidisciplinary team approach by cardiologist, anaesthesiologist, surgeon and intensivist to prevent perioperative morbidity and facilitate early recovery.
Anaesthesia management of a case of huge neck mass due to cervical spine chondrosarcoma with distorted anatomy
Authors: Bhojane Utkarsha P , Deshpande Jyoti P , Salunke Akshay M , Singh Noopur D
Published: November 2021

Chondrosarcoma is the tumor which affects bone and soft tissue with only 2% spinal involvement. Anesthetic management becomes challenging in patients with cervical chondrosarcoma. Here, we are presenting a case of huge neck mass due to cervical spine chondrosarcoma in 70 year old male hypertensive patient. The patient has distorted anatomy with mucosal edema with left tracheal deviation and compression from right side. Awake Nasal Fiberoptic intubation was done with cuffed ETT no 8. The neck mass was removed and Anterior Cervical Discectomy and Fusion (ACDF) with bone grafting. The case was managed with adequate analgesia, replacement of fluids and Blood and Blood products. Considering complex cervical spine surgery and airway edema the patient was shifted to Surgical Intensive Care Unit (ICU) for elective ventilation and advanced monitoring. After serial ABG and proper weaning the patient was extubated next morning smoothly.

Extensive preoperative evaluation, planning, clinical judgement and skilled experienced personale are essential for proper execution of difficult airway cases.
Peri-operative anaesthesia challenges in large anterior mediastinal mass - A case report
Authors: Wadhwa Rachna , Sharma Varun , Ahluwalia Pallavi , Datt Vishnu
Published: November 2021

Thymic mass is a rare tumor in the anterior mediastinum. They are usually of unknown etiology. About 50% of patients are diagnosed incidentally on chest radiographs. A 45 years, BMI-28, male patient presented to cardiac outpatient department with breathlessness and persistent cough for past three months. He also complained of generalized fatigue and nonspecific chest pain. On chest x-ray (PA view), there were diffuse opacities in middle and lower zone and no tracheal compression or deviation. Lateral neck X-ray also ruled out any airway compression. Computed tomography thorax revealed a huge mass occupying the prevascular compartment of mediastinum and insinuating the visceral compartment bilaterally with extension upto bilateral cardiophrenic and anterior costophrenic angles. CT-guided biopsy was consistent with thymolipoma which was surgically resected.

Thymolipomas usually present with nonspecific symptoms. They pose a huge anaesthetic challenge during the peri-operative period in terms of difficult intubation, co-existing airway compression requiring reinforced tubes and fiberoptic guidance, the possibility of sudden airway collapse post-induction, risk of hypoxemia secondary to reduced functional residual capacity (FRC) and haemodynamic disturbances during and after removal of huge mass.
A case report of anaesthesia for craniotomy in sitting position
Authors: Rao Dinesh Suryanarayana , Velmurugan Veena
Published: November 2021

Tumors in the posterior fossa can be done in lateral, supine, prone, sitting and in park bench positions. Depending on the exact position of the lesion and the technical preference of the surgeon, sitting position may be preferred. Sitting position grants best possible access to deeper structures with minimal retraction. However, maintenance of anaesthesia in this position for long duration pose some serious challenges to the anaesthesiologist including high risk of venous air embolism (VAE), hemodynamic instability and respiratory disturbances. Here, we present a case report of a 36year old male diagnosed with pineal gland space occupying lesion (SOL), operated in the sitting position under general anaesthesia. We discuss about anaesthetic management and possible complications that can be encountered.
Anaesthetic management of a case of pulmonary thromboembolism with pulmonary artery hypertension posted for bipolar hemiarthroplasty
Authors: Bhojane Utkarsha Pradeep , Panse Neha Amey , Tejaswini Phalke
Published: November 2021

Lower limb long bone fractures are vulnerable for venous thromboembolism leading to pulmonary thromboembolism. Here, we present a case of preexisting pulmonary thromboembolism with pulmonary artery hypertension posted for bipolar hemiarthroplasty.In hemodynamically stable patients it is better to operate the underlying fracture early to avoid recurrence and worsening of pulmonary thromboembolism. This case was successfully managed under general anesthesia.
Descripción de la herramienta de autoevaluación para el sector salud provista por el BID
Authors: Alzuri Pablo , Cabral Berenfus Florencia , Paz Santiago , Nowersztern Ariel , Libedinsky Pablo
Published: November 2021

Esta guía, realiza una recopilación y clasificación del conocimiento existente a nivel global en lo que respecta a normas, marcos de trabajo, estándares, buenas prácticas y guías de implementación de ciberseguridad, con el fin de orientar al lector en su uso. También se propone una estrategia de 7 pasos esenciales para comenzar o fortalecer la ciberseguridad en una organización del sector salud.
IMPLEMENTATION OF INCLUSIVE PEDAGOGY IN THE TEACHING OF CHEMISTRY
Authors: Lorenzova Jitka
Published: November 2021

The aim of the article is to draw attention to the context that inclusive understanding of pedagogy brings to the education of natural sciences with an emphasis on the teaching of chemistry and to open a debate for cooperation in the fields of social and special pedagogy and the methodology of teaching chemistry. In the article, inclusion is understood as a process of creating and improving the learning conditions of all students, taking into account the broader dimensions of heterogeneity, diversity, and language, as well as cognitive and physical barriers that may occur during the teaching of chemistry. The main focus is centered on the concept of science literacy for all, out of which comes the requirement to link inclusive pedagogical principles and the goals of natural sciences education. We bring to attention the need to increase the sensitivity of chemistry teachers to differences that may have a negative impact on learning outcomes, as well as the need for targeted teacher training for leading inclusive classes and for assessing their level of competence required for inclusive teaching.
ON THE IMPORTANCE OF ADVENTURE INTERPRETATION OF THE LITERARY TEXT DURING TEACHING HISTORY OF LITERATURE
Authors: Ziak Peter , Gashi-Berisha Valbona
Published: November 2021

This study examines the phenomenon of interpretation as part of the study of the history of literature, especially in the case of teaching a foreign language. Interpretation can be about examining the immanent structures of a text, but also about reflecting the reader's relationship to the text and the way he approaches it. With regard to didactic goals, which include, in addition to professional interpretation, also a motivational factor (to teach students to like literature), we offer several innovative teaching techniques aimed at supporting adventure reading.
SEXTING AS A RISK PHENOMENON OF ONLINE ENVIRONMENT AMONG ADOLESCENTS
Authors: Zelena Hana , Polackova Vladimira
Published: November 2021

The study aimed on the realtionship between sexting and a safe online environment among 970 adolescents. The paper offers an analysis of selected research results, which focused on the factors determining the genesis and frequency of sexting among adolescents. At the same time, attention is focused on spreading awareness of the importance of prevention against sexting and the pitfalls of the online environment. The key finding of the research is that adolescents trust and confide their friends in the online environment more than strangers. The high correlation indicates that adolescents are careful when presenting their intimate photos online.
INFLUENCE OF THE MEDIA ON THE EDUCATION OF YOUNG PEOPLE IN MALI: LESSONS FOR EXTRACURRICULAR PEDAGOGY AND INFORMAL EDUCATION
Authors: Traore Amadou
Published: November 2021

This work focuses on the influence of the media on the education of young people in Mali. The emphasis is on the out-of-school pedagogy and informal education lessons that emerge. The objective is to emphasize the educational interests linked to the media in the education of the youth in Mali. To do this, we used the qualitative method through semi-structured interviews and documentary research. It results from the investigations that the media cannot act as educators because of their reification and because education must be interactive and retroactive. This lack of dialogue between the learner and the media concerned relegates the latter to a secondary level. In the context of out-of-school pedagogy and informal education, the media can still play a major role due to their preponderance in social processes, including education and learning. This requires an organization of media productions and a strong involvement of institutions (families, schools, etc.) for objective framing.
Modeling the Delta Robot Movement along a Specified Trajectory in order to Determine the Force Factors Acting on its Drives and Hinges
Authors: Sadilov M.D. , Timofeev G.A.
Published: November 2021

Improving the productivity of machinery and auxiliary equipment has long been one of the main directions for the world industry development. Efforts to gain fractions of a percent of the indicator require both the improvement of existing mechanisms and the introduction of faster manipulators, such as a delta robot. One of the key design tasks for such mechanisms is determining the required drive characteristics. The article presents a solution of the inverse kinematics problem for a delta robot. An algorithm for planning the movement of the working body for performing a typical operation of object permutations is described. The issues of modeling the movement of a robot in the computer-aided design system Autodesk Inventor are considered. The dynamic characteristics of the manipulator have been obtained, on the basis of which it is possible to select drives, bearings and kinematic pairs.
Computer Aided Cylindrical Spur Gear Design
Authors: Lyubchenko M.A. , Garcia Martinez Juan Marcos , Samora Quintana Laura Angelica , Syromyatnikov V.S.
Published: November 2021

Spur gear is used in machines to transmit rotary motion. Due to its simple design, reliability and compactness, it is widely used in technical devices — clocks, conveyors, cars. Two wheels of such a transmission have a constant gear ratio and high efficiency. The first performance criterion is the contact stress fatigue strength of the teeth. The second one is the tooth bending fatigue strength. Manual calculation of a spur gear is a difficult task due to the large number of formulas and conditions. The design area is limited to a small number of options that are not always optimal. It was proposed to expand the design boundaries to hundreds or thousands of options using a computer. Combinations of parameters (modulus, wheel width, number of teeth, material, etc.) form a variety of spur gears with different characteristics: dimensions, strength, weight, etc. The statistical analysis found hidden dependencies between characteristics and initial parameters. On the basis of regression metamodels, the relative importance of parameters for individual characteristics was established. When searching for optimal gears, the Desirability function D was applied with meta-models as arguments. On the basis of the existing standards, a system for computer-aided design of transmissions and statistical analysis of their performance has been developed. As a result of the study, the area of efficient spur gears with optimal characteristics was determined.
Tools and Methods for Analysis of Fatigue High-Cycle Stochastic Loading for Evaluating the Accuracy and Reliability of Numerical Solutions
Authors: Shelofast V.V. , Rostovtsev M.Yu. , Zamriy A.A.
Published: November 2021

The article presents methods of processing and the results of the analysis of the accuracy of solutions obtained when calculating the structure fatigue life in the case of random loading using domestic and foreign computer systems. Unlike foreign analogues, domestic software products for calculating the fatigue life of a product under random loading are based on the regulatory documents of the Russian Federation, which are proposed along with methods adopted abroad.
Effect of Working Process Adjustable Parameters on the Formation of Nitrogen Oxides in a Hydrogen Diesel Engine
Authors: Kavtaradze R.Z. , Onishchenko D.O. , Krasnov V.M. , Rongrong Cheng , Citian Zhang
Published: November 2021

The article considers formation of nitrogen oxides in a hydrogen diesel engine with direct injection of gaseous hydrogen depending on the adjustable parameters of the working process: excess air ratio, cyclic hydrogen supply, advance angle and duration of hydrogen injection. It was found that in a number of cases the effect of these parameters on the working process and the emission of nitrogen oxides leads to results that differ significantly from those in traditional diesel engines running on hydrocarbon fuel. It is shown that by varying the specified controlled parameters, it is possible to minimize the concentration of nitrogen oxides in the exhaust gases of a hydrogen diesel engine.
Improving the Dynamic Properties of a Medium-Speed Diesel Engine Using Variable Turbocharging
Authors: Kuznetsov A.G. , Kharitonov S.V. , Ryzhov V.A.
Published: November 2021

The article presents the results of a computational study of the possibilities of improving the dynamic properties of diesel engines by using a controlled turbocharger. A promising medium-speed diesel engine 12 ChN 26.5 / 31, operating in ship conditions was researched. A mathematical model has been developed for a combined engine as a part of a complex adaptive control system with channels for regulating the speed of rotation and turbocharging. The computer model was implemented in the MATLAB / Simulink software package. Calculated transient processes of the working process parameters of a diesel engine were considered for two methods of turbocharging control: multistage turbocharging and variable geometry turbines – turbines with a variable position of the guide vanes. The effect of pneumatic correction of the fuel supply on the dynamic characteristics of the engine under consideration was studied. The obtained results were analyzed. A comparison of various options for regulating the air supply system in terms of the efficiency of improving the dynamic properties of diesel engines was performed.
Method for Dynamic Stress Design in a Variable Section Blade of a Turbo Machine
Authors: Sidorov A.A. , Golikov A.S.
Published: November 2021

The problem of assessing the dynamic stresses arising from vibrations of the blades of turbo machines is an urgent and significant problem affecting the overall reliability of the turbo machine. Its solution requires a mathematical study and a physical experiment to determine the intensity of the gas flow impact and the blade reaction.However, there is relatively little information in the scientific publications on this issue. The article considers a semi-empirical method for calculating dynamic stresses at the base of a variable cross-section blade at the first tone resonant vibrations. These vibrations can be considered as the most dangerous because of the maximum amplitude. To perform the calculation a real blade was replaced with a calculated one, composed of separate portions with a constant profile, and the contribution of each part to the stress in the base section was determined. An example of calculating the dynamic stress by the proposed method with a resonant vibration of the first tone of a constant-section blade is given. The calculation showed that the solution to a complex problem can be represented as a sum of solutions to simpler problems. The calculation method can be used in the design of turbine and compressor blades.
Transportation of Sulfuric Acid with Vacuum Unit
Authors: Velikanov N.L. , Naumov V.A.
Published: November 2021

In the chemical industry, for example, in the production of sulfuric acid and the movement of sulfur recovered in refineries, the temperature of liquid substances can vary widely. The study of the effect of aggressive liquid temperature and concentration on the productivity and energy efficiency of vacuum systems for transporting liquids has been carried out. The performance (dry air pumping rate) and the consumed power of the vacuum pump ZhVN-12N depending on the pressure in the working chamber are considered. The correction coefficients of productivity for pumping out humid air have been determined for different temperatures. The performance indicators of a vacuum system for transporting liquids based on ZhVN-12N have been investigated. It was found that an increase in the temperature of the pumped humid air increases the average productivity of the vacuum system for transporting liquids, reducing its energy consumption. It is shown that an increase in the sulfuric acid solution concentration results in a decrease in productivity and an increase in the energy consumption of the vacuum system, while the efficiency decreases slightly.
Simulation of Small-Size Space Debris Impact on the Protective Shield of a Transformable Trap
Authors: Prosuntsov P.V. , Alekseev A.A. , Zherebtsova E.O.
Published: November 2021

The growth in the number of space debris, especially small-size debris undetectable by radars, urges the development of protective equipment for the crucial satellites and space station. Passive multilayer shields are the most effective means of protection. As the shields are big, it makes sense to make them out of flexible composite materials that allow them to be deployed in orbit. The article determines the loads acting on the composite load-bearing frame of the trap for small-size debris during impact. For a rational choice of the structural trap layout and optimization of its design parameters it is critical to know these loads. The hypervelocity impact of the projectile on the shield was modeled in the Altair Radioss software package using a combined model based on the Smoothed Particle Hydrodynamic (SPH) method and mesh finite elements. The simulation of the shield penetration at various locations was carried out. For each simulation case, a time history of the reaction force in the attachment point of the protective shield to the load-bearing frame was determined. It was shown that the maximum load of about 2000 N acts for around 6 milliseconds on the joint closest to the impact point for the debris projectile size of 10 mm and velocity of 2 km/s.
Associations between emotional scaffolding, classroom quality and dialectical thinking support in kindergarten
Authors: Veraksa Nikolay , Airapetyan Zlata , Krasheninnikov-Khait Evgenii , Gavrilova Margarita
Published: November 2021

Emotional scaffolding by the teachers of kindergarten children facilitates children's emotional well-being and contributes to their achievements in school. Our aim was to analyze the association between emotional scaffolding, dialectical thinking support and classroom quality. We used the Early Childhood Environment Rating Scale (ECERS-R), Dialectical Thinking Support (DTS) scale and Emotion Socialization Observation Scale (ESOS). The study involved 22 kindergarten groups attended by 6-7-year-old children and their educators who have worked with these children for several years. The actions of teachers aimed at emotional expressiveness modeling and teaching about emotions are positively associated with high-classroom and dialectical thinking support. We revealed for the first time associations between dialectical thinking support and emotional scaffolding in children. This suggests that the discussion of opposites and contradictions in objects and situations in the classroom environment and the study of them in the process of change is positively associated with emotion socialization.       

 

Keywords: dialectical thinking; teaching about emotions; emotional scaffolding; preschoolers; quality of educational environment
Assessing Distance- Education services for students with Learning difficulties during the Corona pandemic
Authors: Al-Ramamneh Abdallatif Khalaf Sliman
Published: November 2021

This study aimed to assess the distance-education services provided to students with learning difficulties during the Coronavirus pandemic. To achieve the objectives of the study, the researcher built two scales to assess distance education services that are offered to students with learning difficulties; one is from the teachers’ viewpoint and the other is from the parent's perspective. The findings showed that the degree of assessment of distance education services for students with learning difficulties during the Corona pandemic was moderate at the overall level among teachers and low among parents. There were no statistically significant differences in the teachers’ responses attributed to the variables: gender, academic qualification, and years of experience. Moeover, there were no statistically significant differences in parents’ responses attributed to the variables: the child's gender, the educational qualification of the parents and the child's age.

 

 Keywords: Corona pandemic, students with learning disabilities, distance education.
Digital literacy curriculum management in kindergarten
Authors: Munawar Muniroh , Fakhruddin Fakhruddin , Rodiyah Rodiyah , Prihatin Titi
Published: November 2021

Education needs to formulate a curriculum that suits the digital era, especially in terms of digital literacy and cyber wellness. This research was conducted to get an overview of digital literacy curriculum management in kindergarten. A total of 122 kindergartens were purposely selected to take part in a survey of this study. Of the 122 kindergartens, 27 kindergartens have integrated digital literacy education in schools, while 95 kindergartens have no integrated digital literacy education in schools. Then, the 27 kindergartens joined a focus group discussion and the results showed that there were six valid and reliable indicators to evaluate the implementation of digital literacy curriculum management in kindergarten, they are: 1)availability of digital infrastructure; 2) competence of managers and teachers in digital literacy; 3) curriculum objectives related to mastery of  basic digital literacy competencies in children; 4) digital literacy implementation in school (children’s learning experiences); 5) digital literacy teaching materials and strategies in schools and 6) parental involvement in curriculum development. In addition, there is a need for a technology integration development module in kindergarten classes that can become a guide for teachers and parents when using digital technology with children.

 

Keywords: Curriculum, management, digital, literacy, kindergarten.
Education politics: Learning model through Google Apps in office administration management of diploma students
Authors: Elyta Elyta , Darmawan Deni
Published: November 2021

Digital natives are unlimited digital information sources to provide convenience in accessing of digital information sources. It’s developed in the Industrial Revolution 4.0, which were marked by the rapid advancement of information technology and which had an abundant impact on people accustomed to receiving high-speed information. The government in the Indonesian National Qualifications Framework policy under Presidential Decree No. 8 of 2012 has outlined the importance of fulfilling educational qualifications for each profile of its graduates to have the competencies needed in the world of work. There needs to be a careful and thorough evaluation step to see whether the campus authorities can meet the competency standards and this problem then motivates researchers to conduct little experiments on using Google Apps to manage office administration and non-conventional learning models by looking at the relationship between the required competency standards and the learning received by students.

 

Keywords: Digital, Educational Politics, Google Apps
The reality of using Moodle In a distance education program
Authors: Al Soub Tarik Faris , Amarin Nidal Zaki
Published: November 2021

Using e-learning system (moodle) in distance education in time of the Covid-19 has become a reality, and the study was concerned with revealing the degree of faculty members   ’benefit from the Moodle system, as well as the nature of the challenges they faced, in addition to their vision to develop the use of Moodle system in teaching. The study used the descriptive analysis method, and the results showed that faculty members have benefited from the Moodle system for a high degree, although they indicated that there are significant challenges. The faculty members suggested continuing training on using the Moodle system and updating the version of the system available at the university. Results also showed that there are statistically significant differences in the estimates of the study sample of the reality of employment in favor of female faculty members as well as faculty members with low teaching experience, in the youth group. Accordingly, the study recommends training the teaching staff to use educational platforms and face the challenges facing distance education through these platforms

 

Keywords: Distance education - Corona pandemic
Magnitude of Covid-19 on Rural Universities in the Eastern Cape Province: Lessons Learnt
Authors: Newlin Marongwe , Grasiab Chisango
Published: November 2021

This research paper aims at assessing the impact of the Covid-19 pandemic on rural institutions of higher learning in South Africa. It further explores lessons learnt from the magnitude of the pandemic. Covid-19 does not discriminate – it spares no institution, no organisation, and no country but infects and affects everyone. Some institutions of learning, when hit by Covid-19 were better prepared to fight it because their alert levels were higher than that of African countries. This study adopted a desktop approach which relied on published data. The paper concludes that the impact of Covid-19 on institutions of higher learning was catastrophic. The magnitude of the Covid-19 pandemic on rural institutions of higher learning in South Africa was devastating because some universities had no strategy to counter the challenge. One of the lessons learnt was that the universities’ think-tanks should plan in advance, be proactive, and be ahead of any challenge.

Keywords: Covid-19; e-learning; higher learning; impact; lessons; pandemic   

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Recruitment and selection of school leaders in Saudi Arabia
Authors: Eman Ahmed , Al-Dhuwaihi Adel
Published: November 2021

The success of schools depends on effective recruitment and selection of school leaders. The present study sought to understand the processes of recruiting and selecting public school leaders in Saudi Arabia from their perspectives. Interview data were collected from 39 high school leaders in the Eastern province in Saudi Arabia. The results of the study indicated that the school leadership recruitment and selection processes in Saudi Arabia consist of few linear steps where the ministry engages in an effort to attract candidates from internal resources, followed by initial screening, and a formal interview to select the candidate from the pool. The analysis also revealed several challenges involved in the recruitment and selection processes of prospective candidates. Based on the findings of this study, schools are currently struggling to recruit qualified candidates that commensurate the mission and the needs of our schools. Therefore, we recommend providing appropriate budget, resources, and training to human resource staff to effectively communicate with prospective candidates, identify the type of candidates and design recruitment and selection strategy accordingly.

 

Keywords: Recruitment, selection, school leaders, human resources, Saudi Arabia.
Implementation of community-based education management: A case study of Islamic boarding schools in Bengkulu City, Indonesia
Authors: Zulkarnain Zulkarnain , Zubaedi Zubaedi
Published: November 2021

The purpose of this study is to reveal the objective conditions and characteristics of Islamic boarding school management as a model of community-based education in Bengkulu City. This study uses a qualitative approach, the method used is a single instrumental case study. The data collection process used (1) in-depth interviews, (2) participatory observation, and (3) documentation study. The data analysis technique is domain analysis by focusing on terms, semantic relationships, and the phrases they cover. The results and research findings show that Islamic boarding school management as a model of community-based education in Bengkulu City needs to be addressed regarding management according to good and correct management principles, which have been using full authority and top leader charisma. Given that Islamic boarding school is a type of community-based education, the application of management must pay attention to the aspects of management that apply to community-based education.

Keywords: management, community-based education, Islamic boarding school
Enhancing students' understanding and skills on dance music: An action research
Authors: Taryana Tatang , Budiman Agus , Karyati Dewi , Julia J.
Published: November 2021

Dance students in university tend to have minimum understanding and skills in processing music to address the creativity needs in new dance works. Therefore, effective and critical learning strategies are needed so they are able to process music to create dance works. This research aims at enhancing dance students’ understanding and skills to process music in creating new dance works in the future. It was conducted using an action research design involving 30 dance students at one of the universities in Indonesia. The results showed that, in terms of skills and understanding of music, students were not used to processing music for their dance works, since they were mostly assisted by music stylists. Through internal and external music exploration learning, the musical dance students’ skills could be improved. Therefore, the findings of this research are recommended to be used as an alternative learning in enhancing dance students’ musical ability.

Keywords: Dance Music, Movement Exploration, External Music, Internal Music, Dance Creativity.
The human capital from Cebu Technological University: An employment tracer inquiry
Authors: Penera Lesley Karen B. , Beduya Nikkithea L. , Mantos Tracy L. , Gulbe Iris L.
Published: November 2021

Based on the theory of standardising the academic approach and human capital theory, this study gauged how the respondents from Cebu Technological University-Daanbantayan Campus Graduate School fared in the work arena. It describes the human capital afforded to them by the university, their employment status, the effect of school-related factors on their employment, and the extent of work values and skills’ contribution. The researchers utilized the descriptive research design’s survey method. Using a validated, modified Graduate Tracer Study instrument, the researchers sourced data from 273 respondents. Findings reveal that majority are employed with permanent status that afforded the country a stable fraction of its workforce – majority of whom is impacting the local area’s education industry. Although respondents found that school-related factors moderately affected their employment, the set of work values and skills afforded to them were 'highly contributive'. CTU-Daanbantayan Campus Graduate School has therefore been remarkably instrumental in its graduates and students’ employment.

Keywords: Graduate tracer study; higher education institutions; human capital; school-related factors; soft skills
Modification of the technology acceptance model in the use of Google classroom in the COVID-19 Era: A case studies in junior high schools
Authors: Pratama Aditya
Published: November 2021

The purpose of this research was to measure the acceptance of Google Classroom use by junior high school students using variables such as habits, satisfaction, knowledge, and skills. To achieve the set objective, it adopted the TAM, which measures technology usability and ease of use. TAM also provides a theoretical basis for measuring students’ perceptions concerning the use of Google Classroom in online learning during the COVID-19 pandemic. Based on this, a questionnaire was used to collect data through an online survey involving a sample of 306 students at the junior high school level. The data obtained was analyzed using exploratory and confirmatory factor analyses to obtain valid and reliable measuring instruments. AMOS was used to measure, assess the structural model based on the goodness of fit standard and test hypotheses.  as many as 84.3% of students had never used Google Classroom until the COVID-19 pandemic struck.

 

Keywords: TAM, Habit, Satisfaction, Knowledge, and skill;