bluuebunny/crossref_metadata_2025 huggingface dataset:
Strategies for Home-kindergarten Collaboration in Nurturing Introverted Preschool Children
Authors: Zhang Weiwei
Published: August 2023

Introverted preschool children may face challenges in social interaction, emotional management, and learning, which often require joint efforts from both home and kindergarten environments. This article aims to explore effective guidance strategies for the home-kindergarten collaboration in nurturing introverted preschool children through theoretical analysis and empirical research. Firstly, the main influencing factors for introverted children, including family environment and individual characteristics, are identified. Subsequently, a series of guidance strategies are proposed, encompassing stress-adaptive educational approaches, diversified home-kindergarten collaboration activities, opportunities for positive interactions, self-expression platforms, and motivational education. The research results demonstrate that these strategies effectively assist introverted preschool children in engaging in social activities, enhancing their sense of self-worth, and stimulating their interest in learning. The findings of this study not only offer guidance for parents and teachers in better understanding and educating introverted preschool children but also provide a new theoretical basis for research on their education.
Integrasi Filsafat dan Ilmu Sosial Holistik dalam Menafsirkan Al-Qur'an
Authors: Rosa Andi
Published: August 2023

This study examines the relationship of holistic social science to the field of Al-Qur'an interpretation. Holistic social science in question is social science based on three aspects in the philosophy of science or the collaboration of various scholars related to the subject of interpretation. The research method used is ontological analysis from the (social) philosophy of science and related to the epistemological character of the thematic interpretation. Compiling and understanding interpretations related to certain scientific fields, including the social field, without the help of a philosophy of science is something that is not sufficient to dialogue reality with the context of the Qur’an verses. Therefore, it is not enough for the interpreters of the Qur'an to rely only on scientific data from the research of the Kantian paradigm without verifying them in a more contextual and actual study based on the intended holistic paradigm. Philosophy and related social sciences at the same time or the cooperation of various social sciences is a holistic paradigm that is needed in exploring an interpretation related to the subject of interpretation or the problem to be dialogued with verses, especially in the field of thematic interpretation. For this holistic paradigm can have functions: First, the position of philosophy of science can offer a proportional dialogue between text and context. Second, the collaboration of science, philosophy, and art can make the social sciences in particular not forget their basic goals and interests, namely: to create a better human life and to make it liberating or emancipatory interpretations.
ONLINE MERCHANDISE AS A TOOL FOR ACTIVATING THE MARKETING BEHAVIOR OF THE COMPANY IN THE ONLINE MARKET
Authors:   National University of Food Technologies, Skopenko Nataliia , Kapinus Larysa ,   National University of Food Technologies, Leleka Olga ,   National University of Food Technologies
Published: August 2023

The article examines the prerequisites for the activation of the marketing behavior of the enterprise on the online market, which is an urgent issue today. It was found that the introduction of new modern marketing technologies is an indispensable condition for successful promotion of products and gaining the trust of online-consumers. Considering that the volume of online sales of goods is growing every year, it is advisable to use online merchandising technologies when selling goods in online stores: make an attractive web-site design, offer convenient navigation and search, apply personalization techniques, and advertise goods and services in Internet, including using social media. It was found that one of the modern tools for promoting goods on the online market and communicating with online buyers is online merchandising – orderly placement of goods on the web-site of an online store to increase sales of goods. That is why the purpose of the article is to formulate proposals for the use of directions for the development of online merchandising in online stores to attract consumers, stimulate sales in order to activate the marketing behavior of the enterprise on the online market. With the help of an Internet survey of young people, the importance of certain criteria in online shopping was determined. Among them: personalization of offers, globalization and the possibility of delivery of goods to other countries, quality of site design, adaptation for mobile phones, interesting content (reviews, entertainment, news, breadth of assortment, recommendations of relatives, friends and users in social networks, home delivery of goods, availability of information about the product (3D visualization, convenience of purchase (quick purchase, possibility to buy 24/7), better price offer compared to competitors, availability of discounts and loyalty program, convenient navigation. Some criteria are related to online merchandising: design, web-site navigation, assortment presentation, personalization. It should be noted that international studies show additional benefits that online stores receive, using the technologies of a personalized approach: increasing sales, increasing customer loyalty. Therefore, it is advisab
STUDY OF MODERN FEATURES OF ACCOUNTING AND CONTROL OF SETTLEMENTS WITH BUYERS
Authors:   Vinnytsia Institute of Trade and Economics of State University of Trade and Economics, Krupelnytska Iryna
Published: August 2023

This publication examines the theoretical foundations of the peculiarities of control over the receipt and accounting of receivables. The purpose of the article is to study the compliance of receivables with European standards, to propose ways to minimize risks and losses from overdue receivables. The use of the discount system and organizational points regarding the management of settlements with buyers are proposed. It is proposed to use gross and net discount methods in accounting. With the gross method, receivables and proceeds from sales are shown in full without taking into account the cash discount. If the customer is then given a discount upon payment, the amount of the discount is reflected in the “Deduction from sales revenue” account. Pure method – the discount not received by the buyer is considered a “penalty” for the purchase of goods “on credit”, which was repaid after the expiration of the discount. Today, some domestic companies practice the cash method of providing discounts. Along with the management of the discount system, it is appropriate to establish a system for controlling the repayment of receivables, which should be based on the following provisions: structuring of the debt over time and control of its “aging” (monitoring); assessment of the partner’s reliability; clear formalized payment policy; fast invoicing system for payment; diversification of available payment options, formation of a “portfolio” of debtors, to minimize the risks of losing a large client. Thus, accounting standards in Ukraine correspond to and are very similar to international standards. Accounts receivable in Ukraine is clearly regulated by P(S)BO 10, and international practice provides general recommendations for its reflection in financial statements. However, in modern conditions, effective management of receivables and their accounting requires various non-standard solutions and approaches. In my opinion, it is also necessary to use the discount system more often in order to increase the number of customers and timely repayment of receivables. A clearly developed payment policy is necessary for the creation, regulation and efficiency of accounts receivable. Accounting and control of settlements with clients requires not only monitoring, but also an effective operational management system from the first day of receivables. We propose to observe the relevant provisions of both the control system and the accounting policy of the enterprise.
MULTIMODAL TRANSPORTATION AS ONE OF THE INTEGRATION PROCESSES FORM ON THE TRANSPORT SERVICES MARKET
Authors:   National University «Odessa Maritime Academy», Kuzmenko Kateryna
Published: August 2023

The transport system is one of the basic branches of the economy, the stable and effective functioning of which provides the necessary conditions for national security, the integrity of the state, raising the standard of living of the population, as well as revenues to the State Budget. All transport complex components are important for the transit role performance of the country: road, rail, pipeline, water, air modes of transport, which require an effective management strategy and a clearly organized transportation process. The transport sector integration directions are focused on new developments and the efficiency of the transport modes choice and on multimodality. In recent years, there has been a steady trend towards globalization of the goods and services market, and Ukrainian trade market is not an exception. This leads to the need to use effective technologies for transporting products from producers to consumers. The most widespread among such technologies is the technology of multimodal transportation. Most often, multimodal transportation includes the transportation of goods in universal containers. Containerization of transportation is a progressive direction in the organization of cargo delivery, which allows to shorten cargo delivery times, reduce cargo losses during transportation, reduce logistics costs and generally increase the efficiency of the transportation process. Multimodal transportation provides convenience for export and import companies, frees from overloading of goods and the need to complete additional documents. In order to improve the organization of multimodal transportation, it is necessary to create comprehensive plans for the development of sea (river) ports and near-port railway stations; ensure the implementation of large-scale investment projects, including international, aimed at the development of transit transportation, in particular with regard to the development of port infrastructure, elimination of "bottlenecks" of railway infrastructure, improvement of operational reliability and technical characteristics of roads in the directions of international transport corridors, construction of border crossing points in accordance with modern European standards, which will strengthen the competitiveness of the national transport system.
METHODS OF FORMING COMPETITIVENESS OF LIVESTOCK PRODUCTS: ESSENCE, THEORETICAL CHARACTERISTICS, AND COMPARATIVE ASSESSMENT
Authors:   National University of Life and Environmental Sciences of Ukraine, Perehuda Yuliia
Published: August 2023

The scientific article has proven the importance of researching the methods of forming the competitiveness of products within the framework of ensuring the formation of the competitiveness of Ukrainian livestock products. The possibility of domestic animal husbandry increasing the volume of production and sales of Ukrainian livestock products on the national and international markets based on increasing the competitiveness of both producers and their products has been emphasized. Identification of reasons for a possible increase in the production volume and sales of Ukrainian livestock products on national and international markets was carried out. Four methods of forming product competitiveness have been defined: market; resourceful; innovative; and marketing. A theoretical description of specific methods of forming the competitiveness of livestock products according to some main parameters (features) has been provided. These features include resources, price, costs, quality, owners and management of the enterprise, counterparties, competitors, consumers, solvent demand, sales promotion, information, and innovations. Separately, a comparative assessment of the methods of forming the competitiveness of products has been carried out with the division of all defined parameters (features) into key and secondary parameters (features), as well as parameters (features) that are not taken into account for forming the competitiveness of products. For the owners and management of the enterprise, counterparties, competitors, and consumers, the type of behavior (impact) on the market, active or passive, have been determined within the framework of a comparative assessment of the methods of forming the competitiveness of products, according to each of the above methods (market, resource, innovation, and marketing). Also, the study has provided conclusions regarding the possibility of using methods of forming the competitiveness of products for Ukrainian livestock products. The article has identified insufficient options to implement the strategies of creating competitiveness of the products for livestock products in practice due to the presence of a significant number of restrictions, first of all, regarding the consideration of the impact parameters.
TRENDS OF FINANCING AND DEVELOPMENT OF THE DEFENSE SPHERE
Authors:   National University “Lviv Polytechnic”, Seliuchenko Nadiia , Danylovych Taras ,   National University “Lviv Polytechnic”
Published: August 2023

The world leaders in defense financing are the USA, China and Russia. The study of the EU countries was based on taking into account the relationship between the volume of military expenditures and the size of the countries (by population) and the level of their economic development. A comparison of EU countries was made according to the following indicators: GDP per capita (in purchasing power standards); military expenditure per capita. In most EU countries, these indicators are correlated. Exceptions are Ireland, Austria, Malta, Lithuania, Estonia and Greece. The first three countries, having high volumes of GDP per capita, direct significantly smaller amounts of funds (per capita) to finance the defense sector. The opposite is the situation in Lithuania, Estonia and Greece, where military expenditure per capita is quite high compared to the level of their economic development, which is undoubtedly due to their geographical location and predictions of possible threats from their neighbors. Cluster analysis methods were used to compare countries simultaneously for both indicators: agglomerative procedure according to the Ward method; k-means method. The clustering results were the same in both cases. Only Ireland was included in the first cluster. The second cluster contains 11 countries: Sweden; France; Germany; Finland; Lithuania; Belgium; Estonia; Italy; Netherlands; Greece; Denmark The third cluster includes 14 countries: Portugal; Slovenia; the Czech Republic; Croatia; Cyprus; Romania; Hungary; Spain; Poland; Slovakia; Latvia; Malta; Bulgaria; Austria. Ireland forms a separate cluster as the country with the largest GDP and one of the lowest military expenditure per capita. The second cluster is characterized by the largest values of statistical indicators. The corresponding indicators for the countries of the third cluster are the lowest. Innovations are intensifying in the defense sector. Military tech is actively developing in Ukraine. Military startups are divided into two groups: hardware; software. Innovations increase the attractiveness of the defense sector for private investors.
AGRO-INDUSTRIAL COMPANIES’ CAPITAL COST AND STRUCTURE
Authors:   National University of Life and Environmental Sciences of Ukraine, Vorobei Ruslan
Published: August 2023

The article presents a study on the assessment of the structure and cost of capital of enterprises in the agrarian sector of the Ukrainian economy. It was found that the problem of optimising the capital structure in order to minimise its cost and ensure financial stability and competitiveness is one of the important issues in which a significant number of stakeholders are interested for enterprises of the agricultural sector, which is one of the key sectors of the national economy. The research was conducted using the following methods: the method of economic and statistical analysis and synthesis (for collecting and processing aggregated information on the capital structure of agro-industrial enterprises, calculating the cost of capital and its elements); the method of graphics and scientific comparisons (for visualising the analysis conducted and identifying trends in dynamics); the method of theoretical generalisation (for substantiating the results of the research conducted and formulating conclusions and proposals for further research). The dynamics of investment in enterprises of the agricultural sector of the economy were studied and the dependence between the increase of investment in the agricultural sector and the growth of the positive difference of the return on capital of enterprises of the agricultural sector compared to the total return on capital of the economy as a whole was revealed. It was found that the expected cost of equity capital is significantly higher than the expected cost of debt capital, with the country risk premium accounting for a large part of the difference. The heterogeneity of changes in the capital structure of the companies studied as a result of changes in the indicator of the expected rate of the cost of equity capital was revealed, which is related to the presence of a consistently cheaper alternative in the form of loan financing and the strategic vision of a particular company to ensure its own financial stability. It is suggested that in establishing cost guidelines for optimising the capital structure and minimising its cost, in addition to changes in the components of the cost of capital, the impact of such changes on the financial stability and solvency of the company should also be taken into account, as a basis for further research in this direction.
METHODICAL ENSURING THE ROBOTISATION PROCESS OF RAILWAY TRANSPORT ENTERPRISES
Authors:   Ukrainian State University of Railway Transport, Toropova Vladyslava
Published: August 2023

The article proves that in the conditions of digitization, the development and implementation of certain robotic technologies, the robotics of business processes are promising directions of innovative development of railway transport enterprises of Ukraine. It was established that robotics mainly covers only some processes of management of operational activities, while the degree of wear and tear of rolling stock and specialized track equipment is critical, and this does not allow railway transport enterprises to maintain leading positions in the market of transport and logistics services. Considering the size of JSC "Ukrzaliznytsia" activity, it must be noted that the development, and most importantly, the implementation of such programs are possible only if there are large investors capable of ensuring a colossal shift in the industry. However, even for them, the issue of the payback period and the possibility of achieving the established strategic, technical-technological, social and environmental development benchmarks remains important, because the investments are colossal. That is why today it is necessary to develop a methodical approach that would take into account the above-mentioned key problems regarding the provision of innovative development of railway transport enterprises in the conditions of the formation of the digital economy. The analysis of existing approaches to the technical rearmament and robotization of enterprises led to the conclusion that the most optimal for use is a comprehensive approach that takes into account the nature of business processes, their systemic interdisciplinary relationship, process risks, economic aspects of the introduction of robots based on the assessment of the life cycle cost. The proposed improved methodological support for the process of robotization of railway transport enterprises, based on the calculation of five components (strategic, economic, technical and technological, ecological, social) and a complex indicator, will contribute to the innovative development of railway transport enterprises in accordance with the mega trends of the development of the world economy and ensure their efficiency and competitiveness.
CURRENCY SECURITY FOR SMALL ENTERPRISES IN UKRAINE
Authors:   Vinnytsia National Agrarian University, Aleskerova Yuliia , Tarasenko Oleksandr ,   Vinnytsia National Agrarian University, Marunych Uliana ,   Vinnytsia National Agrarian University
Published: August 2023

The work is devoted to the analysis of threats to the currency security of small businesses in Ukraine, which is a component of the financial security of Ukraine. A full-scale war in Ukraine requires a review of approaches to the formation of monetary policy in the sphere of state regulation of the financial system and the search for new effective methods of state management. The main challenges for the current financial system of Ukraine are a decline in production, an increase in the number of unemployed, a weakening of the stability of state finances, and threats to the stability of the currency. It has been proved that today the currency security of Ukraine is under the influence of a large number of internal and external threats, including the growth of the foreign debt, the outflow of funds abroad, the high degree of dollarisation of the economy, the inefficient structure of gold and foreign currency reserves, the imperfection of the currency and exchange rate policy, the presence of currency risks, the conduct of illegal currency transactions, the intervention of international financial organisations, foreign advisers and consultants in the currency policy of Ukraine. The conducted monitoring of the financial activity of a small enterprise is aimed at making certain effective management decisions providing the enterprise with currency and financial security in the modern conditions of the financial system of Ukraine as a whole. The current state of currency security of small businesses of Ukraine is analysed in terms of the need for a deeper study of it in order to solve existing problems related to its provision. As a result of the study of this problem, it is proposed to take measures to ensure the currency security of the country's small businesses and to support the long-term stability of the national monetary unit. The role of state banks in the implementation of state programmes for the support of small business should be strengthened, and for the safety of their activities a comprehensive system of state banks should be created, including highly specialised state commercial banks, state banks of a broad profile, state development banks, partner financial institutions, regional funds, insurance organisations.
FEATURES OF THE DEVELOPMENT OF THE MODERN WORLD MARKET OF LIQUEFIED NATURAL GAS
Authors:   State Biotechnological University, Muzychenko Mykola , Khanova Olena ,   V.N. Karazin Kharkiv National University
Published: August 2023

The article examines the peculiarities of the development of the world liquefied gas market in the conditions of global challenges of today. The historical prerequisites for the formation of the market are briefly presented, it is noted that the liquefied gas market has become an alternative to pipeline transport. Attention is drawn to the fact that in recent years, it is liquefied natural gas that occupies a leading role in the global energy balance. Attention was drawn to the fact that in the long term until 2040, the increase in LNG exports will primarily be due to supplies from the USA, the countries of the Middle East and Africa. Qatar and Australia have been the leading countries in the production of liquefied gas for a long time. The role of the USA as one of the largest exporters of liquefied gas at the current stage and the rapid growth of its share in the structure of exporting countries are highlighted. It is stated that Qatar and the USA are exporters whose supply geography has global differentiation, as for Australia – almost all Australian LNG goes to the Asian (India, China) and Asia-Pacific (Japan, South Korea, Taiwan) regions. Significant changes, mainly in the countries of the European Union, that the geography of American LNG exports underwent in 2022 after the start of full-scale military events in Ukraine were noted. The structure of natural gas imports by types of supplies was analyzed. It was established that the increase in import volumes is mainly due to LNG, the volume of which has increased by more than 3.5 times since the beginning of 2000. The dynamics of changes in the volumes of pipeline transport and LNG imports to European countries during 2017-2022 were analyzed. The main countries – importers, Japan, South Korea, China, the USA, India, Spain, Great Britain, Brazil, France, and Mexico – were identified. It is noted that the annual volumes of LNG import capacities of the three countries of the Asia-Pacific region (Japan, South Korea, and China) exceed the combined LNG import capacities of all other countries of the world by 1.7 times.
МІКРОКВАЛІФІКАЦІЇ ЯК ЗАСІБ РОЗВИТКУ ПРОФЕСІЙНОЇ КАР’ЄРИ ВИПУСКНИКІВ ЗАКЛАДІВ ОСВІТИ
Authors: Рашкевич Юрій
Published: August 2023

Упровадження мікрокваліфікацій стало характерноюособливістю розвитку освітніх систем. Мікрокваліфікації розробляються з метою надання особам, що навчаються, конкретних знань, умінь, навичок абокомпетентностей, які відповідають соціальним, культурним та особистим освітнім потребам або потребам ринку праці. Мікрокваліфікації мають власну нішу у системі професійних кваліфікацій, оскільки вони вважаються важливим засобом професійного розвитку, який забезпечує розширення доступу до місця праці. Мікрокваліфікації найбільше пов’язані з такими ключовими поняттями, як: короткострокове навчання, працевлаштування, ринок праці та компетентності.
Integrating Novel Microchannel-Based Solar Collectors with a Water-to-Water Heat Pump for Cold-Climate Domestic Hot Water Supply, Including Related Solar Systems Comparisons
Authors: Kashan Mohammad Emamjome , Fung Alan , Swift John
Published: August 2023

In Canada, more than 80% of energy in the residential sector is used for space heating and domestic hot water (DHW) production. This study aimed to model and compare the performance of four different systems, using solar energy as a renewable energy source for DHW production. A novel microchannel (MC) solar thermal collector and a microchannel-based hybrid photovoltaic/thermal collector (PVT) were fabricated (utilizing a microchannel heat exchanger in both cases), mathematical models were created, and performance was simulated in TRNSYS software. A water-to-water heat pump (HP) was integrated with these two collector-based solar systems, namely MCPVT-HP and MCST-HP, to improve the total solar fraction. System performance was then compared with that of a conventional solar-thermal-collector-based system and that of a PV-resistance (PV-R) system, using a monocrystalline PV collector. The heat pump was added to the systems to improve the systems’ efficiency and provide the required DHW temperatures when solar irradiance was insufficient. Comparisons were performed based on the temperature of the preheated water storage tank, the PV panel efficiency, overall system efficiency, and the achieved solar fraction. The microchannel PVT-heat pump (MCPVT-HP) system has the highest annual solar fraction among all the compared systems, at 76.7%. It was observed that this system had 10% to 35% higher solar fraction than the conventional single-tank solar-thermal-collector-based system during the wintertime in a cold climate. The performance of the two proposed MC-based systems is less sensitive than the two conventional systems to collector tilt angle in the range of 45 degrees to 90 degrees. If roof space is limited, the MCPVT-HP system is the best choice, as the MCPVT collector can perform effectively when mounted vertically on the facades of high-rise residential and commercial buildings. A comparison among five Canadian cities was also performed, and we found that direct beam radiation has a great effect on overall system solar faction.
Validation of Computational Fluid Dynamics (CFD) Model of a Building Integrated Photovoltaic/Thermal (BIPV/T) System
Authors: Roeleveld Derek , Hailu Getu , Fung Alan , Naylor David , Yang T. , Athienitis Andreas K.
Published: August 2023

A building integrated photovoltaic/thermal (BIPV/T) system was studied using computational fluid dynamics (CFD). The BIPV/T system was composed of solar photovoltaic (PV) panels mounted in front of a wall/roof with an air channel in between. A numerical model was developed consisting of a PV layer, an air channel, and an insulation and plywood layer. Experiments were conducted by the Solar Simulator Laboratory at Concordia University using three different orientations of 0°, 45° and 90° at two different flow rates. A comparison of the temperatures profiles between the numerical predictions and the experimental data is presented. Overall, the numerical results were in good agreement with the experimental data.
Optimum Tilt Angle and Orientation of Photovoltaic Thermal System for Application in Greater Toronto Area, Canada
Authors: Hailu Getu , Fung Alan
Published: August 2023

We present a study conducted to obtain optimum tilt angle and orientation of a solar panel for the collection of maximum solar irradiation. The optimum tilt angle and orientation were determined using isotropic and anisotropic diffuse sky radiation models (isotropic and anisotropic models). The four isotropic models giving varying optimum tilt angles in the range of 37 to 44°. On the other hand, results of the four anisotropic models were more consistent, with optimum tilt angles ranging between 46–47°. Both types of models indicated that the collector tilt should be changed four times a year to receive more solar radiation. The results also indicate that the solar panel should be installed with orientation west or east of due south with a flatter tilt angle. A 15° change in orientation west or east of due south results in less than 1% reduction of the total solar radiation received. For a given optimum tilt angle, the effect of photovoltaic/thermal (PV/T) orientation west or east of due south on the outlet temperature was determined using a one-dimensional steady state heat transfer model. It was found that there is less than 1.5% decrease in outlet temperature for a PV/T panel oriented up to 15° east or west of due south from March to December. This result indicates that existing roofs with orientations angles up to 15° east or west of due south can be retrofitted with a PV/T system without changing the roof shape.
Transactive control of a residential community with solar photovoltaic and battery storage systems
Authors: Yu Danilo , Brookson Aidan , Fung Alan , Raahemifar Kaamran , Mohammadi Farahnaz
Published: August 2023

Transactive energy is a two-way exchange of energy between the electric power grid and a community's distributed energy resources, offering opportunities for efficiency improvements through market-based economic and control techniques. A community's distributed energy resources include electricity-producing resources and controllable loads. Increased usage of unsynchronized generation of non-dispatchable solar photovoltaic energy and household demand at the community level can adversely affect the power quality, reliability and network balancing of the electricity grid. A solution was developed in this paper in the form of energy storage and demand side management on a solar residential community. An agent-based transactive energy management system was developed and simulated using multiple prosumer houses with roof-top PV systems and local energy storage. Experimental work conducted on an archetype house, near Toronto, Ontario, Canada, was used to model an all-electric residential house and clusters were created with varying orientations and building properties to mimic different efficiency levels of the houses within the virtual community. A machine learning algorithm using historical data and weather forecasts from Natural Resources Canada (NRCan) was used to forecast the community's energy generation as well as building's thermal loads. In this community, consumers can curtail their loads based on price signals sent to smart devices in homes. Open-loop mixed integer linear programming technique (MILP) and model predicted control (MPC) were compared and evaluated. The simulation shows promising results with a 9% energy savings during the summer solstice day and 5% during the winter solstice day when compared to the normal operation of houses' mechanical equipment.
Performance Evaluation of an Air Source Heat Pump Coupled with a Building-Integrated Photovoltaic/Thermal (BIPV/T) System under Cold Climatic Conditions
Authors: Hailu Getu , Dash Peter , Fung Alan
Published: August 2023

A theoretical investigation of the performance of a two stage variable capacity air source heat pump (TS VC ASHP) coupled with a building-integrated photovoltaic/thermal (BIPV/T) system (integrated into the wall) is presented in this paper. Air was circulated behind the photovoltaic arrays to recover the thermal energy. TRNSYS was used to evaluate the performance of the TS VC ASHP coupled with the BIPV/T. The thermal performance of the TS VC ASHP was evaluated for two scenarios when the TS VC ASHP was running in heating mode. The two scenarios are: (A) directly feeding ambient air to the TS VC ASHP, and (B) coupling the TS VC ASHP to a wall integrated BIPV/T. The coefficient of performance (COP) of the TS VC ASHP was evaluated and compared for these two separate scenarios. Results suggest that the COP of the TS VC ASHP can be improved for the months of February through April by coupling the TS VC ASHP to a wall integrated BIPV/T system.
Thermal Analysis of Insulated Concrete Form (ICF) Walls
Authors: Ekrami Navid , Garat Anais , Fung Alan
Published: August 2023

A three dimensional numerical model of a PVC water pipe embedded inside an insulated concrete form wall was numerically developed. Different wall thickness sizes and optimal distance between pipes were analyzed. Three inlet temperature and four inlet velocity for each set have been studied. Thermal behavior of the concrete was investigated in a transient mode. This study focused on storing thermal energy inside the wall and using it when there is a demand rather than transferring heat for space conditioning. Predicted heat transfer rate and potential thermal energy storage were tabulated. In general, this study helps designers to gain detail understanding of heat transmission between water pipe and concrete.
Simulation and experimental investigation of two hybrid solar domestic water heaters with drain water heat recovery
Authors: Tanha Kamyar , Fung Alan , Kumar Rakesh
Published: August 2023

In this paper, the performance of two solar domestic hot waters (SDHW) with drain water heat recovery (DWHR) units is investigated. Both SDHW systems are recently installed at the Archetype Sustainable Twin Houses at Kortright Center, Vaughan, Ontario. The first SDWH system in House A consists of a flat plate solar thermal collector in combination with a gas boiler and a DWHR unit. The second SDHW system in House B includes an evacuated tube solar collector, an electric tank, and a DWHR unit. Both systems are modeled in TRNSYS, and the models are validated by experimental data. The addition of the DWHR and the flat-plate solar thermal collector would result in 1831 kWh of annual energy saving in House A. While the addition of the DWHR and the evacuated tube collector in House B would result in an annual energy saving of 1771 kWh. Subsequently, the models are used to investigate the performance of similar systems for five major Canadian cities of Halifax, Montreal, Toronto, Edmonton, and Vancouver. The conjunctions of solar thermal collectors with DWHR units are found most beneficial in Edmonton. It is also noted from experimental and simulated results that flat-plate solar collector-based water heater produced more thermal energy than the system based on the evacuated tube solar collector for all major Canadian cities.
Development and optimization of artificial neural network algorithms for the prediction of building specific local temperature for HVAC control
Authors: Demirezen Gulsun , Fung Alan , Deprez Mathieu
Published: August 2023

This research accounts for the outcome of a major cloud-based smart dual fuel switching system (SDFSS) project, which is a dual-fuel integrated hybrid heating, ventilation, and air conditioning (HVAC) system in residential homes. The SDFSS was developed to enable optimized, flexible, and cost-effective switching between the natural gas furnace and electric air source heat pump (ASHP). In order to meet the optimal energy consumption requirements in the house and provide thermal comfort for the residents, various high-quality sensors and meters were installed to record multiple data points inside and outside the house. The performance of the system was monitored in the long term, which is a common practice in energy monitoring projects. Outdoor temperature data plays the most crucial role in operating HVAC systems and also is a key variable in the decision-making algorithm of the SDFSS controller. Therefore, this study introduces an innovative and unique approach to obtain the outdoor temperature that could potentially replace high precision sensors with a data-driven model utilizing weather station data at a time resolution of 2 minutes and 1 hour. In this work, a series of artificial neural network algorithms were developed, optimized, and implemented to predict the outdoor temperature with an average of 0.99 coefficient of correlation (R), 1.011 mean absolute error (MAE), and 1.315 root mean square error (RMSE). It has been demonstrated that the developed ANN is a reliable and powerful tool in predicting outdoor temperature. Thus, the proposed model is strongly suggested to be implemented as an alternative to temperature sensors in hybrid energy systems or similar systems requiring accurate ambient temperature measurements.
Solar Panel Optimization Using Peltier Module TEC1-12706
Authors: Maryani Sri , RD Kusumanto  , Carlos RS
Published: August 2023

One of the renewable energy sources that is presently being developed in Indonesia is the technology that converts solar energy into electrical energy using solar cells or PV panels. The power output of a solar panel is influenced by several factors, including solar radiation intensity, panel surface temperature, shading, and the angle of solar incidence. One factor that can influence the efficiency of a solar panel is the temperature of the solar module. The efficiency of a solar panel decreases as its temperature increases. Installing a Peltier TEC1-12706 on a PV panel will have an impact on heat absorption on the surface of the PV panel, thereby optimizing the power output of the PV panel. This study utilizes three monocrystalline solar panels with a power rating of 50 Wp, which are installed under three conditions: the first solar panel without a Peltier device, the second solar panel with twenty Peltier devices connected in series beside the solar panel, and the third solar panel with twenty Peltier devices connected in series both beside and beneath the solar panel. The output of these solar panels is remotely monitored using IoT as a connection to facilitate the monitoring and control of measured variables, including ambient temperature, solar panel surface temperature, voltage, current, solar panel output power, and efficiency. The data is collected at a height of approximately 12 meters in an outdoor laboratory at the Telecommunications Department of the Electrical Engineering Polytechnic of Sriwijaya Palembang. The measurements are collected between approximately 07:00 to 17:00 local time. The research results reveal that the monocrystalline PV panel with Peltier devices connected in series beneath and beside the solar panel has a higher absorption temperature compared to the solar panel without a Peltier device. Irradiance and ambient temperature have an influence on the voltage and current of the PV panel. The measured irradiance is directly influenced by the ambient temperature. The PV panel, with the addition of Peltier devices beneath and beside it, has an output voltage of 0.3 volts, a higher current value of 0.37 amperes, an increase in output power of 8.9 watts, and an overall average efficiency enhancement of 32.6% compared to the PV panel without a Peltier device.
Efektivitas Pilates Exercise untuk Mengurangi Nyeri pada Ibu Hamil
Authors: Sukmawati Sukmawati , Mamuroh Lilis , Nurhakim Furkon
Published: August 2023

ABSTRACT Pain incidence  that pregnant women may feel are low back pain, back pain, and even pain during and after childbirth. One way to reduce these incidents is to do light exercise, namely pregnant pilates exercise One way to reduce these events is to do light exercises such as pregnancy pilates. The most widely discussed pregnancy exercise method is Pilates. The aim of a literature review is to identify the benefits of Pilates exercise to reduce pain in pregnant women. The method used is a narrative review with the databases used being PubMed, ScienceDirect, EBSCOhost, SAGE Journals, and Taylor & Francis. The research design used in this study was a randomized controlled trial, quasi-experimental, single-blind randomized clinical trial, experimental study design, and case study, in Indonesian and English, published from 2017 to 2022. There were 8  articles discussing the effect of pilates exercise on pain in pregnant women conducted in Indonesian,Turkey, Iran, Korea, Cyprus and Spain. Based on a literature review, pilates exercise can reduce pain in pregnant women such as back pain and also pain during labor. Keywords: Pain In Pregnant Women, Pregnancy Exercise, Pilates Exercise  ABSTRAK Kejadian nyeri yang sering dirasakan ibu hamil adalah nyeri pinggang, nyeri punggung, bahkan  nyeri  selama dan setelah persalinan. Salah satu cara untuk mengurangi kejadian tersebut adalah dengan melakukan olahraga ringan seperti senam hamil. Metode senam hamil yang ramai diperbincangkan adalah Pilates. Tujuan dari tinjauan literatur ini adalah mengidentifikasi manfaat dari latihan pilates untuk menurunkan nyeri pada ibu hamil. Metode yang digunakan adalah narrative review, menggunakan data base  PubMed,  ScienceDirect,  EBSCOhost,  SAGE Journals, dan Taylor & Francis. Desain penelitian  yang digunakan pada penelitian ini adalah randomized controlled trial, quasi experimental, single-blind randomized clinical trial, experimental study design dan case study,   berbahasa Indonesia dan inggris, dipublikasikan dari tahun 2017 hingga 2022. Ditemukan 8 artikel yang membahas pengaruh senam pilates terhadap nyeri pada ibu hamil yang dilakukan di Indonesia, Turki, Iran, Korea, dan Indonesia. Berdasarkan tinjauan literatur senam pilates dapat menurunkan nyeri pada ibu hamil seperti nyeri punggung dan juga nyeri pada saat persalinan. Kata Kunci: Nyeri Pada Ibu Hamil, Senam Hamil, Pilates
Simple Electronic System of Security for a 24-Hour Grocery Store
Authors: Kridoyono Agung
Published: August 2023

Grocery stores, commonly found in cities, represent the latest model of retail establishments offering a diverse range of daily essentials and groceries while operating 24/7 for added convenience. However, these stores often encounter security challenges, such as employee lapses like falling asleep or leaving their posts unattended, which can jeopardize safety. To address this issue, we have developed a simple yet effective tool to enhance store security, utilizing an analysis of detection and sensor error rates. This security system relies on analog circuits to process signals from motion sensors, triggering a buzzer notification upon detecting movement. Through this research, the aim of the research is to quantify the level of detection accuracy and sensor error magnitude, as well as determine the optimal sound level for the generated notification. The results of this research contribute to bolstering safety and vigilance in these grocery stores.
STRATEGI PENGEMBANGAN USAHATANI RUMPUT LAUT (Studi Kasus di Desa Liya Bahari Indah, Kecamatan Wangi-Wangi Selatan, Kabupaten Wakatobi, Provinsi Sulawesi Tenggara)
Authors: Hardiana Rika , Nurliani Nurliani , Nuraeni Nuraeni
Published: August 2023

Tujuan penelitian ini adalah menganalisis tingkat produksi dan pendapatan petani, mengetahui potensi dan penggunaan sumberdaya (manusia, modal dan peralatan), mengetahui akses pasar dan perkembangan harga, mengidentifikasi peran pemerintah dalam pengembangan usahatani rumput laut dan menganalisis strategi yang diterapkan dalam mengembangkan usahatani rumput laut di Desa Liya Bahari Indah, Kecamatan Wangi-Wangi Selatan, Kabupaten Wakatobi. Kegunaan penelitian ini yaitu sebagai bahan pertimbangan bagi pemerintah maupun masyarakat yang berkaitan dalam pengembangan usaha rumput laut. Penelitian ini dipilih karena merupakan salah satu sentra produksi rumput laut di, Kabupaten Wakatobi. Penentuan sampel dilakukan secara acak sederhana dengan mengambil 20% dari populasi petani. Penelitian ini menggunakan metode analisis SWOT. Hasil penelitian menunjukan bahwa produksi rumput laut yaitu 4.016 kg/responden 5.822 kg/ha dan pendapatan petani yaitu Rp 5.415.386/responden Rp 7.848.385/ha, penggunaan sumberdaya manusia dan peralatan optimal, akses pasar sulit diakses dan perkembangan harga mengalami fluktuasi, peran pemerintah sangat rendah, strategi S-O yaitu penggunaan potensi tenaga kerja dan penggunaan sumberdaya peralatan, strategi W-O yaitu penyuluhan yang intensif, strategi S-T yaitu penyebaran akses pasar dan pengajuan bantuan modal juga bantuan sarana dan prasarana pendukung industri, strategi W-T yaitu membentuk wadah kelembagaan
ANALISIS KONTRIBUSI TENAGA KERJA RUMAHTANGGA PETANI (Studi Kasus Rumahtangga Petani Jagung dan Padi di Desa Salajangki dan Kelurahan Bontoramba, Kecamatan Bontonompo, Kabupaten Gowa)
Authors: Kautsar Ifrad A. , Rosada Ida , Ilsan Mais
Published: August 2023

Tujuan Penelitian ini adalah untuk mengetahui potensi kerja anggota rumahtangga petani jagung dan padi di Kecamatan Bontonompo Kabupaten Gowa, menganalisis curahan kerja anggota rumahtangga petani untuk usahatani jagung dan usahatani padi di Kecamatan Bontonompo Kabupaten Gowa, menganalisis kontribusi tenaga kerja anggota rumahtangga petani untuk usahatani jagung dan usahatani padi di Kecamatan Bontonompo Kabupaten Gowa. Penetuan sampel menggunakan metode purposive sampling. Jumlah sampel yang digunakan dalam penelitian ini adalah sebanyak 50 orang. Besarnya potensi kerja yang dimiliki rumahtangga petani dianalisis dengan analisis potensi kerja, sedangkan untuk mengetahui besarnya potensi kerja yang dicurahkan anggota rumahtangga dianalisis dengan analisis curahan kerja. Untuk mengetahui persentase kontribusi yang disumbangkan tenaga kerja responden menggunakan alat analisis kontribusi tenaga kerja. Hasil penelitian menunjukkan bahwa potensi kerja yang dimiliki rumahtangga petani adalah 877,96 HKP per tahun dan 292,65 HKP per musim tanam. Potensi kerja yang dicurahkan anggota rumah tangga petani untuk usahatani jagung adalah 111,46 HKP, sedangkan yang dicurahkan untuk usahatani padi adalah 60,52 HKP. Besarnya kontribusi yang disumbangkan anggota rumahtangga responden untuk usahatani padi dari tenaga kerja pria adalah 18,08%, tenaga kerja wanita memberikan kontribusi sebesar 14,53%. Adapun tenaga kerja anak memberikan kontribusi sebesar 11,74%. Sedangkan untuk usahatani jagung tenaga kerja pria memberikan kontribusi sebesar 29,97%, tenaga kerja wanita memberikan kontribusi sebesar 25,98%, dan tenaga kerja anak memberikan kontribusi sebesar 11,73%.