bluuebunny/crossref_metadata_2025 huggingface dataset:
Relationship between expectations and satisfaction on technical knowledge - an empathic attitude in the clinical practice of nursing students. Hospital de emergencias Grau EsSalud, 2019.
Authors: Miguel Sinchez Sonia E.
Published: October 2021

Objective: To determine the relationship between expectations and satisfaction regarding technical knowledge - empathic attitude in the clinical practices of nursing students at the Grau de EsSalud Emergency Hospital in 2019. Methods: A study with a quantitative approach, observational type, and correlational design showed 80 nursing students who carried out their clinical practices at the Hospital de Emergencias Grau participated in 2019. Results: Nursing students were characterized by an average age of 21.36 years, 75% were female, and 72.5% were single. The expectations and satisfaction regarding technical knowledge - empathic attitude in the clinical practices of nursing students were high levels in 97.5% and medium level in 60%, respectively. There was no significant relationship between expectations and satisfaction regarding technical knowledge - the empathic attitude of the clinical practices of nursing students (p = 0.661). Conclusion: There is no relationship between expectations and satisfaction regarding technical knowledge - empathic attitude in the clinical practices of nursing students at Hospital de Emergencias Grau de EsSalud in 2019.
Telerehabilitation in knee arthroplasty, therapeutic alternative and ethical challenge
Authors: Bahamondes Avila Carlos V. , Cifuentes Cea Bernarda M.
Published: October 2021

Mr. Editor Acting as an alternative to the traditional treatment applied by kinesiologists, physical therapists or physiotherapists, telerehabilitation emerges, which as an emerging telemedicine field, is defined as a set of tools and procedures to develop the rehabilitation process remotely. With increasing support and evidence, it is used in a wide range of clinical conditions, providing an opportunity to people in rural and remote areas to obtain high-quality consulting and advice A main point of interest is people who underwent knee arthroplasty, the vast majority of whom are older adults, and who, while they remain in rehabilitation therapy, are in a state of fragility, demand the assistance of family members or caregivers and must assume costs and extra time to travel to be seen. For them, telerehabilitation is considered an effective alternative after hospital discharge, since similar results are obtained to conventional treatment in functional status and level of physical activity and, as it is developed with specialized clinical supervision, it reduces the costs of care maintaining an efficacy similar to traditional treatment at home or clinic.
Shock Cryptic, emerging diagnostic
Authors: Ayala García Ricardo J. , Soto Ticse Sandra , Matos Santiváñez Stephany , Ortiz de Orue Allison
Published: October 2021

Cryptic shock is a poorly identified clinical entity, and it still describes a patient with signs of tissue hypoperfusion without affecting blood pressure. In the emergency department, it is important to identify signs of hypoperfusion and evaluate various hidden sources of infection by taking a complete medical history, a thorough physical examination, and, if necessary advanced imaging. It is necessary to conclude that the importance of the timely diagnosis of this clinical entity helps to improve the prognosis significantly.
Timely and early respiratory rehabilitation in patients with covid 19 pneumonia in a referral hospital
Authors: Morales Avalos Antonio O. , Llanos Tejada Felix K. , Salas Lopez Juan A. , Casanova Mendoza Aldo R.
Published: October 2021

SARS-CoV-2 is a beta-coronavirus of the same subgenus as SARS and MERS viruses, they share the same gene binding receptor, angiotensin converting enzyme (ACE2). (1) The spectrum of disease severity is varied, with the mild form being the most frequent (81%), and severe disease present in 14% of cases, with critical presentation being present in 5%, with a mortality of 2.3%.(2) The post-pneumonia respiratory sequela caused by beta-Coronaviruses is diffuse alveolar damage with fibrotic lesions; the pathophysiological mechanism is multifactorial, which involves activation of transforming growth factor beta (TGF-β)(3), IL1, IL6, MCP1 and TNF-α secondary to epithelial injury and subsequent inflammation. In addition, exposure to high O2 concentrations and effects of barotrauma, caused by advanced oxygen/ventilatory support, activate the pro-fibrotic TGF-β pathway, resulting in aberrant repair characterized by exaggerated deposition of fibroblasts, myofibroblasts and collagen. Forty-seven percent and 25% of patients who survive moderate to severe COVID-19 pneumonia have decreased carbon monoxide diffusion and predicted total lung capacity, respectively. (4)
Posner – Schlossman Syndrome: case report
Authors: Mamani Maquera Diego José , Pantoja Dávalos Nahuel
Published: October 2021

Introduction: Posner - Schlossman Syndrome (PSS) is a rare disease, more prevalent in men between 20 and 50 years old, characterized by recurrent attacks of anterior uveitis and ocular hypertension. Clinical case: We report the case of a 42-year-old patient with a single eye. He came to the consultation presenting decreased visual acuity, photobobia, halos around the lights, and intense pain in his left eye. The ophthalmological examination revealed inflammatory signs in the anterior segment, elevated intraocular pressure and damage to the optic nerve. Medical treatment was started with corticosteroids and topical antiglaucoma drugs, oral acetazolamide and intravenous mannitol, obtaining no response and it was decided to perform a surgical intervention (Ahmed valve implantation) in the left eye, subsequently achieving a good clinical evolution and resolution of the case. Conclusion: This report highlights that the episodic and recurrent nature of SPS requires strict monitoring.
Clinical performance of a new prediction rule of systemic loxoscellism. case report
Authors: Pichardo Rodriguez Rafael Martin de Jesus , Saavedra Velazco Marcos , Sánchez Alvarez Cesar Enrique , Bracamonte Hernández Juan Jesús , Aldave Visurraga Abel , Ruiz Franco Oscar Emilio
Published: October 2021

Systemic or cutaneous-visceral loxoscelism is the most severe clinical presentation of loxoscelism. Currently there is no validated laboratory diagnostic method that allows us to confirm the presence of this disease in the face of arachneism. However, there is a clinical prediction rule (CPR), which allows us to predict the evolution of a bite towards a systemic condition and which would be useful in emergency rooms. We present the case of a woman who developed the systemic picture of loxoscelism to whom a new CPR was applied for the early detection of systemic loxoscelism, presenting adequate performance for early evaluation in emergency services.
Pediatric diseases more frequently: a peruvian perspective
Authors: Sevillano Jimenez Javier A. , Contreras Pulache Hans L.
Published: October 2021

Dear Editor We have read with great interest the article "Pediatric diseases with greater frequency in an international airport in Mexico" by Figueroa-Uribe A, et. al. where they show us the most registered diseases in medical attention in the emergency medical service of an international airport in Mexico. (1) When analyzing the data shown, we realize that it is possible to compare the results shown in their study in the Peruvian territory, since there is evidence from the Dirección de Epidemiología of the Dirección Regional de Salud (DIRESA) - Amazonas(2) which mentions a high prevalence of respiratory and digestive diseases, which are considered, as in the study conducted at the Mexican airport, to be more frequent.
The reality of patients in hemodialysis before COVID-19 pandemic
Authors: Vásquez Bambaren Mónica , Soto-Cáceres Víctor Alberto , Serna-Alarcón Víctor
Published: October 2021

In a pilot test carried out in the department of Lambayeque (Peru) about the profile of patients who entered hemodialysis for the first time with grade five chronic kidney disease (CKD 5), evidence was found different from other Latin American. The treatment modality for CKD 5 patients increased through hemodialysis according to the Latin American Registry of Dialysis and Kidney Transplantation from 2000 to 2008. In Peru, 84.75% of patients are registered with this form of treatment still in force in our country and others.
The role of information and communication technologies in supply chains efficiency in COVID-19 pandemic
Authors: Rogulin R. S.
Published: October 2021

Information and communication technologies have become an integral part of our life. Supply chain management is also currently in a digital transformation, especially during the period of disruptions in global and local supply chains caused by the COVID-19 pandemic. The purpose of this study is to provide an empirical descriptive analysis of the role of digital technologies in improving the efficiency and recovery of supply chains, as in the pre-crisis period and in a pandemic.

The research is based on the processing of statistical data and macroeconomic indicators, presented in the public domain. The following indicators were considered as basic indicators: gross domestic product as a characteristic of the level of economic development of Russia before the crisis; Logistics efficiency index; Digital Life Index. For comparative analysis, countries from different categories were selected in the context of the selected assessment indicators. The results obtained confirmed the significant role of information and communication technologies in improving the efficiency and restoration of supply chains destroyed in connection with COVID-19 pandemic.

It has been concluded that at the national level, developed economies showed high efficiency of their logistics systems and high scores of digital life rating. For countries with a level of economic development below average, the impact of information and communication technologies on the efficiency of the logistics system was not decisive in this context. The implementation of information and communication technologies makes it possible to restore the supply chains destroyed by the crisis and increase their efficiency, because of which a business in a pandemic gets a chance to survive.

The results of this study can be used by heads of enterprises of various levels in determining the strategy and tactics of enterprise development, including crisis management. Research methods and data can be applied by researchers to further research into the impact of information and communication technologies on the recovery and efficiency of global and local supply chains, including considering updated data that consider the impact of the coronavirus pandemic on the indicators used in this article.
“Tele-everything” world and hybrid office model – new global trends after the COVID-19 pandemic
Authors: Vasilieva E. V.
Published: October 2021

As a result of forced social distancing and nationwide blockages, the habit of doing everything remotely has rapidly developed in society. The majority of work and household activities have been transferred to the Internet, and this has naturally led to the emergence of a new trend – “TV-everything” world.

The rapid shift to a remote format and accelerated automation of processes have also changed attitudes to the previous management rules. The vast majority of companies decided during the pandemic to move some categories of staff to full-time remote work. One of the most debated topics today is the hybrid office model, where some employees work from home.

The aim of the study is to show the consequences of the pandemic, which will determine the growth points in technology and management for the future, and to highlight the important challenges that the new norm of organisational management brings with it.

The article presents the results of a survey of managers from various sectors carried out between March and April 2021. A review of the use of new technologies to improve the quality of the hybrid office was carried out. The importance of reinforcing the corporate culture in a remote working environment is highlighted and some guidelines for building communication in a remote working team environment are listed.

These include: fostering corporate spirit, establishing a shared vision of the situation, mentoring, a culture of continuous feedback, informal communication, and newcomer adaptation.

In a changing work environment, companies need to be extremely attentive to the well-being and productivity of teams and the mental health of employees.

 A number of measures have been proposed to monitor and improve the resource status of staff in organisations, including the use of computer systems that can conduct real-time assessments of employee performance and engagement based on artificial intelligence technologies.
Education of migrant children as a contribution to Russia’s future
Authors: Rakhmonov A. Kh.
Published: October 2021

The article explores the relationship between education and migration, statistics of children from migrant families in educational institutions in Russia, access to education for children from migrant families in Russia, and the integration of migrant children in schools in Russia.

 Recommendations on state interaction with the children of migrants are offered. Population movements and migration processes are an integral part of human history. Another modern phenomenon, globalisation, entails fundamental changes in the world and the world market. Migration is a constant concomitant phenomenon of these changes.

 Education plays a crucial role in supporting third-country migrants in adapting to a new country and culture as well as in building social relations in their host communities. Education is a key resource for participating in the economic, social, political and cultural life in today’s education and knowledge society.

Experience has repeatedly shown that differences in occupational status and chances on the labour market and associated income, social welfare living standards and public reputation, as well as differences in political, social and cultural participation, are linked to differences in educational attainment.

Social integration of migrants through participation in the institutions of the host society, such as the education system and the labor market, is undoubtedly one of the most significant social problems in Russian society. For migrant children, language and structural assimilation in the education system in the sense of formal equality of opportunity are key to social integration in the host country.

The main donor countries, from which most people migrate to Russia, are primarily the CIS countries. About 30 % of the total flow of migrants in Russia, finding with family and children. The birth rate among migrants is higher than local ones. Accordingly, Russia faces a big challenge, led by migrant children, from whom it can get a big contribution in the future, if they get a good education.

The main problems faced by migrant children in Russian schools are lack of knowledge of the Russian language, discrimination, refusals of enrolment, etc. The aim of the study is to examine the educational situation of migrant children in Russian schools, as well as their education as a contribution to the future of Russia.
Improvement of information support for formation of management reporting on the example of the activities of an energy company
Authors: Belousova M. N. , Oreshina M. N.
Published: October 2021

The purpose of the study is to develop a system for generating management reporting on the production activities of an energy company on the SAP Business Objects Platform. To build a reporting system, the following tasks has been set and solved: the conceptual and datalogical models of the data warehouse were created, data areas have been selected from the general data model, the data warehouse has been designed and developed, universes for report groups have been created, a mechanism for integrating data with the data warehouse has been implemented.

The paper analyses the information and technological infrastructure of an energy company as well as formulates the basic requirements for the system being created for generating reporting. Two main subsystems have been designed: data storage and integration. The process of implementing the designed subsystems in physical form has been described using the appropriate software products: SAP Hana, SAP Universe Designer, SAP Data Services, SAP Business Intelligence.

Thanks to the configured system through the corporate data bus, a relatively simple data integration mechanism became possible. In its information and technological architecture, the company managed to simulate an acceptable data warehouse model and set up the appropriate data flows. A complex data warehouse model has been implemented, and a convenient platform for further data processing has been provided. A clear data integration scheme is configured using SAP Data Services, with the ability to scale and configure the data loading schedule. The developed system has been put into operation and is used by employees to make management decisions within the framework of their professional activities.
Correlation and regression analysis of the investment attractiveness of the petroleum refining industry
Authors: Gayfullina M. M. , Nizamova G. Z.
Published: October 2021

The article presents the results of the analysis of the investment attractiveness of the petroleum refining industry using correlation and regression methods. It has been suggested to evaluate the level of investment attractiveness of the petroleum refining industry through capital productivity. A system of indicators affecting the investment attractiveness of the petroleum refining has been formed in the context of resource and production, financial, economic and social groups of factors. This methodology of correlation and regression analysis for modeling factors affecting investment attractiveness has been presented. The methodology includes the construction of a pair correlation, the selection of factors, the construction of a generalised correlation matrix using the “Correlation” tool in the “Data Analysis” package Microsoft Excel, the regression analysis based on the finally selected factors, the construction of the regression equation, the justification of the obtained dependence using the “Regression” tool in the “Data Analysis” package MS Excel.

According to the results of calculations for the type of economic activity “Production of coke and petroleum products” in the Russian Federation in dynamics for 2012 –2019, a strong correlation has been revealed between the output-capital ratio and such factors as the oil refining depth, profit from sales and labor productivity.

The results of the study can be used to identify significant factors affecting the investment attractiveness of the petroleum refining industry in order to further optimise them.
Features of the tourist enterprises image formation
Authors: Kushkhova Z. V. , Ryvkina O. L. , Khrabrova N. I.
Published: October 2021

The article defines the types of tourist enterprises depending on the duration of operation on the market and the features of activities to maintain and develop their image based on the empirical data obtained as a result of the tourist services market research in Yalta (Republic of Crimea). These are enterprises that are that for the first time begin to operate in the tourist market and form their image, enterprises that are active in the market, but do not form their image; enterprises that need to review or completely change their image building activities.

For each type of enterprise, the stages of the image formation, including the necessary marketing tools, have been developed and substantiated: for the first type of the enterprises – determination of the image audience, development and approval of corporate identity, implementation of internal and external image building, image management; for the second type – image audit, analysis of the causes of the loyalty loss, development and implementation of image events; for the third type – image audit, choice of approach to the image program implementation. It is proved that the image of the tourist enterprise is characterized by a life cycle.

It is proposed to consider four stages of the life cycle: formation; development; stability; blurring and loss. The characteristic features of the stages, management goals and the program of image building events have been determined.
Mobility management
Authors: Sakulyeva T. N.
Published: October 2021

The mobility management concept encompasses various services, organisational and advisory measures that allow users to change their travel choices.

The article investigates various aspects and factors of mobility management policy. The transport behavior, the possibilities and expediency of joint trips, cycling and walking, the issues of changing transport behavior and making changes in transport infrastructure were studied. The cost-effective options for improving the road use efficiency, the volume and quality of information given to traffic participants as well as the intensity of its provision, which ensure the success of the mobility management policy, were analysed.

The comprehensive policy in the field of bicycle and pedestrian traffic is necessary at the city level or even at the national level linked to the policy of urban development for the successful use of bicycle and pedestrian transport. The mobility management policy directed to encourage the wider use of cycling and pedestrian transport should be aimed to removing barriers obstructing their use. It is also necessary to make changes in existing infrastructure in order to increase the traffic capacity during rush hours.
Analysis of the methods and trends of money laundering by import – export transactions
Authors: Beketnova Ju. M.
Published: October 2021

The article discusses the urgent problem of money laundering. In an effort to circumvent the law and avoid justice, seeking to circumvent the law and avoid justice, criminals resort to a wide variety of ways and methods of money laundering. However, typical patterns or patterns in the organization of shadow financial services schemes can be traced. The study of typologies of money laundering is considered by the international anti-money laundering community as one of the areas that ensure the strategic superiority of state bodies in the fight against this phenomenon.

The purpose of the study is to identify trends in money laundering in foreign economic transactions and methods of counteraction. The research method is typological analysis. For a long time, the study of typologies in financial monitoring was of an empirical nature, an attempt was made in this article to systematize and scientifically interpret the accumulated knowledge. The article examines examples of typologies of export-import transactions, including “carousel” commodity schemes, highlights the indicators of this type of money laundering schemes. The regulatory authorities can adopt the research results.
Economic reliability of the organisation in the context of groups of interests of the business environment
Authors: Borisyuk D. A. , Astafyeva O. E.
Published: October 2021

An important aspect of the interaction of the subjects of legal relations is the process of making a management decision on the possibility of partnership. This makes it necessary to assess the economic reliability of a participant in the relationship, both a potential partner and within the framework of the interaction that took place.

 The purpose of the article is to show a variety of approaches when analysing the organisation economic reliability. The approach proposed to assessing the organisation reliability from the point of view of the goals of different interest groups of the organisation business environment has been illustrated. The object of the study is the concept of the organisation economic reliability. The subject of the study is the differences between the goals (markers) of different interest groups in assessing the organisation economic reliability.

 The methodological and theoretical basis of the research is general and private scientific approaches to studying the essence of the definition and methods of assessing the organisation economic reliability. The article is based on the system approach methodology. During the study the methods of comparative analysis, the method of expert assessments, normative and logical methods were used. In addition, CyberLeninka, eLibrary.Ru, Scopus, Web of Science, and Google Scholar were used as academic citation database. To ensure the accuracy of the literature review process, all publications were studied independently by the authors.

 The article reveals the dependence of the assessment and the form of presentation of the results of the assessment of the organisation economic reliability on the group of users in whose interests it is carried out.
Changes in the organisation management system
Authors: Antonov V. G. , Kuptsova E. V. , Kuptsova E. S.
Published: October 2021

Modern business operates in a new reality – the dominance of information technology and changing forms of organisations. Against this backdrop, the crisis of the management system, its inability to effectively deal with business issues, has clearly manifested itself. The COVID-19 epidemic has significantly complicated the situation in the management. The aim of the study is to outline ways of transforming the management system to help enterprises emerge from organisational stress.

 The state of governance is analysed over time: 1) the situation before the pandemic is considered; 2) the current changes since the pandemic began, in the face of both constrained business activity and a worsening crisis, are noted; 3) а forecast is given for business and management organisations for the coming post-pandemic period and regarding conversion to the new format of operations in which remote management and networked organisations have a strong place. A desk study was used and data from nationwide surveys of management employees was used. The research resulted in tactical and strategic decisions to improve the management system in organisations and proposals for changes in the theoretical and methodological basis of management, proposals for changes to the theoretical and methodological basis of governance.

Management should be based on the laws of development of socio-economic systems rather than on precedents from business practices. Interaction management, trust management, real-time strategic management are paramount and require organisations to be adaptable, flexible, integrated and self-organised. Using the possibilities of digitalisation, it is necessary to improve the accuracy of management, ensuring that management decisions are calculated and learn to measure not only the results of activities, but also the state of the economic system. The philosophical foundations of management must be changed, based on the development of science, education and culture.
Analysis of the state of electronic banking services in the Arab countries
Authors: Vasilieva E. V. , Alhannah A.
Published: October 2021

The analysis of the provision of electronic banking services in Arab countries has been performed. The banking sector is an important part of the economy in any country, however in the Arab countries there are certain problems in the application of the concept of electronic banking. The purpose of this study is a comparative analysis of approaches to the application of information and communication technologies in the banking sector in Algeria, the United Arab Emirates and Syria, identification of the features and bottlenecks in the development of electronic banking services.

It has been shown that in order to develop a strong economy and provide quality services that meet customer needs, Arab countries are clearly keen to implement the concept of electronic banking in their banks, but there are still some obstacles which prevent them from competing with international financial organisations. On the other hand, there are several successful scenarios for providing electronic services around the world, for example, the experience of the United Arab Emirates, Algeria, Lebanon and other Arab countries.

To assess the level of use of electronic services by the Syrian population at the present time, the authors conducted a survey of clients of the Syrian state and private banks. Based on the survey results, it has been concluded that customers are interested in receiving services in electronic form, but this is hindered by the political situation in the country and a number of other problems. General conclusions have been made about the priority of measures that should be taken at the state level in order for Arab banks to meet modern trends in the financial sector.
MOISTURE CONTENT AND VARIETY OF JUTE SEED IS AFFECTED BY LONG TERM SEED STORAGE
Authors: Tareq Md. Zablul , Mojakkir Arif Mohammad , Hasan Mir Mehedi , Alam Md. Jewel , Sadat Md. Abu
Published: October 2021

Seed perform a vital role in agricultural sector for crop production as well as seed business. Scarcity of healthy seed hinder not only the crop production but also the quality of seed. Storing of healthy seed with proper storing condition is one of the suitable methods to maximize production however, healthy seed also lose its quality during seed storage. Seed remains viable for long time if the seed stored by maintaining seed moisture content, storage temperature with storage container. So, this experiment was carried out to observe the quality parameters of jute seed during long term storing. To find out the storage effect an experiment was conducted on march, 2020 at seed laboratory, Jute Agriculture Experimental Station, Jagir, Manikganj, Bangladesh during the period of January 2016 to March, 2020. Plastic pot was used in this experiment as a storage container to store jute seeds. Three tossa jute (C. olitorius L.) varieties viz., O-795 (V1), O-9897 (V2) and OM-1 (V3) were used in this study. Result revealed that storage period and jute variety showed significant effect on different seed quality parameters. The highest seed germination, field emergence, seed vigour and the lowest 1000-seed weight, moisture content were recorded in T5 (2019-20) treatment. On the other hand, the lowest seed germination, field emergence, seed vigour and the highest 1000-seed weight, moisture content were recorded in T1 (2015-2016) treatment. Furthermore, seed germination, field emergence, seed vigour was negatively but 1000-seed weight was positively correlate with moisture content. Results revealed that extended storage period caused the decreasing seed quality and seed can be stored for three years in plastic container without hampering the seed quality.
RELATIVE TOXICITY OF SOME CHEMICAL PESTICIDES AGAINST JUTE HAIRY CATERPILLAR (SPILOSOMA OBLIQUA W.) IN TOSSA JUTE (CORCHORUS OLITORIUS L.)
Authors: Rahman Md. Sohanur , Islam Md. Nazrul , Polan Mohammad Sahin , Talukder Fakhar Uddin , Muku Md. Mia
Published: October 2021

Pesticides have been a major contributor to the growth of agricultural productivity and food supply. Pesticides were a key factor in significant agricultural productivity growth during the last century and continue to be a critical factor in reducing crop damage. Fifteen insecticides were investigated to select their effective and economic doses against Hairy caterpillar in a Tossa Jute variety during April-October’ 2020 at the Department of Entomology, Manikganj and Narayanganj, Bangladesh Jute Research Institute (BJRI), Bangladesh following Randomized Completely Block Design with three replications. All new insecticides with a standard were found effective for controlling jute hairy caterpillar giving 95.38, 94.55, 95.19, 92.85, 93.59, 94.22, 93.49, 93.62, 89.84, 95.72, 93.56, 93.38, 94.42, 95.39, 91.34 and 95.41 % at Manikganj; 95.78, 93.32, 93.97, 93.18, 92.09, 92.49, 93.74, 92.93, 92.29, 93.69, 93.95, 93.17, 95.31, 94.99, 92.11 and 94.53 % reduction of infestation at Narayanganj at 5th day after spray over control plot respectively. In Manikganj, the highest fibre yield (3.66 t/ha) was found in the plot treated with Rock 20 EC and the lowest (2.96t/ha) was found in Reset 20WDG treated plot. In case of Narayanganj, the highest fibre yield (3.85 t/ha) was found in the plot treated with Proxy 20 EC and the lowest (2.79t/ha) was found in Daman treated plot. These insecticides can be recommended for the farmer’s use to control jute hairy caterpillar.
DETERMINANTS OF PRODUCTIVITY AND MAJOR PRODUCITON CONSTRAINTS OF MANGO FARMING IN SAPTARI DISTRICT OF NEPAL
Authors: Shrestha Amrit , Joshi Narayan Raj , Dahal Bhishma Raj , Bhandari Subash , Acharya Shree Ram , Osti Bandana
Published: October 2021

Mango is one of the major fruit crops of Terai region of Nepal; however, farmers are experiencing poor productivity. Therefore, a study was conducted to determine the factors affecting the productivity and major constraints of the mango production in Saptari district of Nepal. Pre-tested semi-structured questionnaire was administered among randomly selected 106 farmers from the district of Nepal. Face to face interview was scheduled to obtain the data from sampled farmers from March 26 to May 25, 2020. Multiple regressions were used to access the various factors affecting the productivity of the mango. The regression model depicted that the total number of productive trees and training on commercial mango production was found statistically significant at 1% level of significance. A unit change in the total number of productive trees was found to change the productivity by 0.94 units. Additionally, one-unit change in the trainings regarding commercial mango farming caused the change in productivity by 0.53 units. Further, incidence of diseases and pests, poor access to market, lack of irrigation facility, incidences of natural hazards and modicum of fertilizers on orchard were the major production constraints of mango in Spatari district of Nepal. Therefore, the study has suggested indispensable need training on commercial mango cultivation practices in Saptari district of Nepal.
Theoretical and practical aspects of the use of mathematical methods and information technology in education and science
Authors: Abramov Vadym , Astafieva Mariia , Boiko Mariia , Bodnenko Dmytro , Bushma Aleksandr , Vember Viktoriia , Hlushak Oksana , Zhyltsov Oleksii , Ilich Liudmyla , Kobets Nataliya , Kovaliuk Tetiana , Kuchakovska Halyna , Lytvyn Oksana , Lytvyn Peter , Mashkina Irina , Morze Nataliia , Nosenko Tetiana , Proshkin Volodymyr , Radchenko Serhii , Sablina Milana , Semenikhina Olena , Semeniaka Svitlana , Skorobreshchuk Halyna , Khoruzha Liudmyla , Yaskevych Vladyslav
Published: October 2021

The monograph highlights the results of the scientific topic "Theoretical and practical aspects of the use of mathematical methods and information technology in education and science" (registration number 0116U004625) by the Department of Computer Science and Mathematics, Faculty of Information Technology and Management, Borys Hrinchenko University of Kyiv (deadline: March 2016 - March 2021). The main scientific and practical results in the following areas are presented: mathematical and computer modeling, hardware and software of automated control systems, application of digital technologies in the educational process. For scientific and pedagogical, scientific and pedagogical workers who are interested in modern problems of application of mathematical methods and digital technologies in education and science.
Experimental Investigation of Innovative Thermal Mechanical Refrigeration System
Authors: Sleiti Ahmad K. , Al-Ammari Wahib A. , Al-Khawaja Mohammed
Published: October 2021

The current electrical refrigeration and air condition systems are considered as one of the major sources for ozone depletion and global warming problems. Furthermore, they consume a large percentage of the worldwide gross production of electricity (around 17%). Therefore, developing new refrigeration systems that might be able to work using renewable sources (solar, geothermal, etc.) and waste heat sources is necessary to address these problems. In this paper, the experimental investigation of an innovative thermal-mechanical refrigeration (TMR) system is presented. The TMR system replaces the electric compressor of the conventional refrigeration systems with an innovative expander-compressor unit (two connected double-acting cylinders). The proposed ECU can be driven by ultra-low heat temperature sources, has simple configuration, and high flexibility for the operating conditions. A hybrid electric-compressor and ECU refrigeration setup was developed to investigate the performance of the ECU and compare it to that of an electric compressor. The experiment was conducted using R134a as a working fluid at different masses. The results show that a maximum COP of 0.57 is obtained at a refrigerant mass of 30g (in electric mode) and a maximum COP of 0.41 is obtained at a refrigerant mass of 60g (in ECU mode).
Gearless Powertrain for Electric Vehicles
Authors: Iqbal Atif , Reddy Prathap , Meraj Mohammad
Published: October 2021

Electrical Machines are driving the modern world in one way or the other. The modern world is moving towards the sustainability of ecological systems and greener modes of transportation to stabilize the environmental conditions for future generations. For this, the multiphase machines have risen as efficient solutions over traditional 3-phase electrical machines. In this project, a Pole Phase Modulated (PPM) multiphase induction motor drive is developed for gearless electric vehicle applications. With the help of conventional pole changing techniques (like using multiple auxiliary windings or dual stator windings) variable speed and torques can be achieved but the poor copper utilization, de-energization of the windings, and multiple auxiliary windings are the major limitations. In this project, a novel single stator winding multiphase induction motor is developed that is capable of delivering variable speed-torques by varying the number of phases as well as poles simultaneously using novel multiphase power converter topologies. Moreover, the proposed drive offers high fault-tolerant capability, the ability to handle high power with reduced voltage ratings of power electronic devices, better torque/power distribution, and improved efficiency with a lesser magnitude of space harmonics, etc. The proposed drive gives similar speed torque characteristics of conventional IC-based conventional vehicles, which helps in the elimination of the gearbox system in the EVs. This minimizes the cost, size, weight, and volume of the vehicle. Two-level inverters and multilevel inverters with carrier phase shifted space vector PWM are developed for achieving the better performance of the PPM-based MIM drive w.r.t. efficiency, torque ripple and DC link utilization. Fault-tolerant operation of the drive with respect to inverter switch or source failures is also developed as a part of the project and presented. To operate the PPM-based MIM drive smoothly in different pole phase combinations, the indirect field-oriented vector control is developed and presented.
Multiple Output Contactless Inductive Power Transfer System for Electric Vehicle Battery Charging Station
Authors: Iqbal Atif , Al-Hitmi Mohammed , Pandav Kiran
Published: October 2021

The proposed fast-charging system is capable of simultaneously charging the three different duty electric vehicles (small, medium, heavy) at the same time. The size and weight of the proposed system are reduced by operating at a higher switching frequency. The load (battery) dependency and system efficiency are eliminated and improved, respectively, by adopting the series-series compensation network in the proposed system. The CC-CV charging algorithm is adopted to charge the battery and PI controller, and the additional controlling loop is developed to remove the overshoot of the current during the CC to CV transition.
Simultaneous CO2 Treatment and Blue Energy Generation from Wasted Industrial Streams
Authors: Elmakki Tasneem , Zavahir Sifani , Gulied Mona , Azam Reem , Kasak Peter Peter , Popelka Anton , Han Dong Suk
Published: October 2021

In the last decade, there has been an increased global need for finding bright solutions to tackle industrial wastes and emissions release. Herein, this work explores the utilization of a compact Reverse Electrodialysis (RED) system that transforms the chemical potential energy of mixing an ammonia based purified industrial wastewater stream (low concentration stream - LC), with an effluent high salinity RO brine stream (High concentration-HC) into viable electrical energy. The LC and HC streams are directed from ammonia production plants and seawater reverse osmosis desalination plants, respectively. The acquired electrical energy from this RED process is simultaneously used to power an Electrochemical (EC) system. The electrochemical system utilizes two critical waste streams produced from ammonia production plants. One being a wastewater stream that is purified in the anode chamber of the cell via the use of active chlorine species, and the other being the huge amount of emitted CO2 that is directed into the cathode chamber and there converted to value added chemicals. The purified wastewater stream coming out of the EC system is used as the aforementioned LC stream in the RED process, hence, forming an integrated RED-EC system that manages industrial waste streams, minimizes liquid discharge & CO2 emissions, and employs a sustainable internal energy production process. In this study, the RED system is first optimized to attain the maximum power density through exploring the influence of concentrate and dilute stream concentrations, compositions and flowrates. In addition, to the number of membrane pairs needed to produce desired voltages. The RED cell gave a maximum power density of 3.25 W.m-2 with 20 membrane pairs and a salinity gradient of 0.98M between a concentrated brine stream and a mixed NaCl/(NH4)2SO4 stream. Furthermore, around 15 cell pairs were needed to provide -1.5 V of energy to drive CO2 conversion to formate.
A Design-led FEWW Nexus Approach for Qatar University
Authors: Karanisa Theodora , Ouammi Ahmed , Hamdi Helmi , Saadaoui Imen , Fetais Noora , Sayadi Sami
Published: October 2021

Demographic explosion, climate change, urbanization, change of life quality, and food demand have put extra pressure on Food, Energy, Water, and Waste (FEWW) resources.A special focus has been placed on university campuses as they are representative urban communities with a substantial need for food, energy, and water and they generate waste. Furthermore, universities can be models for the community as they can apply and disseminate new ideas. The case study of the Qatar University via the Doha Living Lab (DLL) generates ideas and gives solutions to the FEWW Nexus through urban agriculture practices adopted to the climatic conditions of Qatar. The DLL follows the M-NEX Design method consisting of three steps: Design Development, Design Evaluation, and Implementation by engaging stakeholders and the local community. The areas of the DLL increase food production on the campus while minimizing the use of energy and water, enhance biodiversity as well as soil quality by valorizing food waste. The carbon footprint of DLL is reduced by 2% when the same quantity of food is produced locally than imported. This applies when 75% of the energy needs come from renewable sources, 75% of the needed animal feed comes from bio waste, and finally, when novel greenhouse technologies are utilized with low energy consumption. According to the research results, the FEWW Nexus and food production on campus can be sustainable in terms of low carbon footprint with minimal resource use, use of renewable energy sources, and food waste valorization.
Liquid exfoliated MoS2 Sheet coupled with Conductive Polyaniline for Gas Sensor
Authors: Parangusan Hemalatha , Bhadra Jolly , Al-Qudah Razen , Elgurashi Hibballa , Abdelhakem Marwa , Mohaned Ebtihal
Published: October 2021

Polyaniline (PANI)/MoS2 composites with porous microspheres were prepared by a hydrothermal and in situ polymerization method. The structural, optical, and morphological properties were characterized by X-ray powder diffraction, FTIR, scanning electron microscope, transmission electron microscope. The XRD results confirmed that the PANI/MoS2 composite was formed. Morphological characterization reveals that the successful formation of few to multilayered MoS2 nanosheet intercalated with the PANI nanoparticles.
Lithium capture in Seawater Reverse Osmosis (SWRO) Brine using membrane-based Capacitive Deionization (MCDI) System
Authors: Azam Reem , ElMakki Tasneem , Zavahir Sifani , Ahmad Zubair , Hijós Gago Guillermo , Han Dong Suk
Published: October 2021

Lithium-battery based industries including vehicles, electronics, fusion and thermonuclear, consume lithium rapidly, which raises the need for developing a lithium recovery system. Lithium global market consumption in 2016 was reported to be 35% in batteries manufacturing. The total content of lithium in seawater and oceans is estimated at 2.5 × 1014 kg, with an average concentration of 0.17 mg/L. Salt lakes contain 1,000–3,000 mg/L of lithium, while geothermal water up to 15 mg/L. In 2020, the US Geological Survey (USGS) reported that the total Li resource is about 80 million ton. In nature, lithium does not exist as pure metal owing to its high reactivity with water, air, and nitrogen. Commonly lithium is mined from metallic minerals from earth or brine salt marsh and used in various fields in the form of lithium carbonate (60%), lithium hydroxide (23%), lithium metal (5%), lithium chloride (3%), and butyl lithium (4%). The extraction of 1 kg of lithium needs around 5.3 kg of lithium carbonate. The amount required to produce lithium-ion batteries (LIB) for cell phones or electric cars is estimated to be 0.8 kg/s of lithium metal, which is equivalent to 25,000 tons per year. As we use this much of LIB, this will end up having significant amounts of lithium battery waste, thus recovering LIBS and using it as cathode electrode in MCDI is an excellent way with benefit. This work proposes to efficiently utilize seawater reverse osmosis (SWRO) brine as a medium to recover lithium from seawater followed by its selective capture of lithium element using SLIB as MCDI cathode electrode material. Thus, these attempts could be closer to an improved and more effective loop of lithium targeted capture-reuse system.
Modelling and Analysis of Power Electronic Converters for EV Charging/Discharging for G2V, V2G and V2X Operations
Authors: Iqbal Atif , Islam Shirazul , Meraj Mohammad
Published: October 2021

The research work deals with the implementation of various chargers used for electric vehicles in the context of Qatar. These chargers are categorized as slow, fast, and super-fast chargers. The electric vehicles not only lead to a reduction in carbon footprint, but the V2X mode of operation of EVs implemented with the help of a bidirectional converter is used to provide ancillary services in the system such as shaving peak and valley in load demand, frequency, and voltage regulation, balance the supply and demand for active power and reactive power, compensate grid current harmonics, improve power quality, provide reactive power compensation and improve system stability. Due to the above-mentioned advantages, V2X mode of operation will be explored in this research work.