Digital Commons Network^™

Thesis Quality Of Primary School Teacher Education Department, Ramdhan Witarsa, Moh. Fauziddin, Zuwati Hasim, Lussy Midani Rizki

Jurnal Pendidikan: Teori, Penelitian, dan Pengembangan

This study aims to describe the quality of students' thesis in the primary school teacher education study program. The method used in this research is descriptive qualitative case study. This method has three stages, namely: the description stage, the reduction stage, and the selection stage. The data in this study were sourced from 16 students graduating in 2020 and 2021 at one of the private universities in Riau. The results of this study can show that the quality of student thesis is stagnant and tends to decrease in quality. Therefore, this research can be used as a reference in improving …

Estimating Parameters Via L-Linear Method For Second-Order Regression Of Polynomial Model, Mahdi Younis Mohammad, Ahmed Dheyab Ahmed

Journal of Economics and Administrative Sciences

In this paper, estimation of the parameters of the second-order polynomial regression model was obtained when the error is distributed it is distribution long-tailed symmetric because of the presence of outliers and using Maximum Likelihood, and L-Method. simulation is illustrated, and Mean Squared Error (MSE) is used as an evaluation criterion. This research includes six sample sizes (50,60,80,90,100,120) and includes the application of the methods of the medical data representing diabetes.

Nozzle Reactive Hydroturbine With Guide Device, O O. Bozarov, Kh S. Usarov, R Aliyev, S F. Ergashev

Technical science and innovation

The article presents the principle of operation of a jet turbine with a nozzle based on the "Segner" wheel and studies its shortcomings. In order to eliminate the identified shortcomings, a guide device was developed, which is installed inside the hydraulic turbine impeller. Using the Bernoulli equations and the Zhukovsky theory, the energy parameters of a microhydroelectric power station with a developed divertor device and the water flow rate in a hydroturbine are determined. The energy parameters calculated on the basis of theoretical results are analyzed, and it is found that the efficiency of a hydroturbine increases by 10-20% depending …

Efficiency Of Using Solar Collectors In Energy Saving And Saving Energy Resources, R R. Tillahodjaev, A A. Mirzayev

Technical science and innovation

Most manufacturers, suppliers and installers make only a rough calculation of solar collectors. The article goes step-by-step calculation, solar systems for heating, in order to fully provide the house with warmth in winter. Calculation of the real power of the solar collector. Calculation of the efficiency of the solar collector in the direction. Calculation of solar collector performance by installation angle. Features of flat panels. The performance of the vacuum manifold. How many solar collectors do you need to heat your home? Hot water connection.

Evaluation Of Energy Efficiency Of Photoelectric Heat Batteries With Mechanism Of Solar Observation, M N. Tursunov, X Sabirov, I A. Yuldoshev, U R. Xolov

Technical science and innovation

Cooling of the rear surface of photoelectric batteries (PEB) was investigated by attaching a newly designed heat collector made of parallel channel cellular polycarbonate to the rear surface in order to improve the electrical and thermal efficiency in this research work. The experiment was conducted on June 7, 2022 at the Heliopolygon of the Physical-Technical Institute of Tashkent city (latitude: +41,34 (41°20'23"N), longitude: +69,3 (69°17'36"E). 2 340 W monocrystalline silicon PEBs(photoelectric batteries) were used as experimental devices. The rear surface of the first is equipped with a cooling …

Case Study: Exploring Pre-Schoolers’ Attitudes And Behaviour Towards The Environment, K Paal

Plymouth Institute of Education

No abstract provided.

Esg And Intellectual Capital Efficiency: Evidence From Asean Emerging Markets, Etikah Karyani, Muhamad Resa Perdiansyah

Jurnal Akuntansi dan Keuangan Indonesia

This study aims to investigate the impacts of Environmental, Social, and Governance (ESG) in total and individual performance (“E”, “S”, and “G”) on firms’ intellectual capital (IC) efficiency. The Value-Added Intellectual Coefficient (VAIC) and Modified Value-Added Intellectual Coefficient (MVAIC) were used to measure IC efficiency. Meanwhile, the annual ESG index data from the ASEAN-4 were used to measure ESG from 2015 to 2020. The results show “E”, “S”, and “G” and total ESG positively affect firms’ efficiency in managing IC. In addition, the industry type moderates these relationships in terms of that banks have a greater influence than non-banks. Our …

Host-Pathogen Interactions In A Changing World: Microbes, Mucosal Defenses, And Multiple Hosts, Brandon C. Labumbard

Graduate Doctoral Dissertations

As fungal diseases continue to emerge, research increasingly focuses on host-microbiome interactions and links to disease. Certain skin-associated microbes may benefit hosts by protecting them from invading pathogens. Seasonal changes in the host environment can also result in shifts in the microbial community and pathogen virulence – potentially influencing disease dynamics. I investigated how cutaneous microbial communities differ across hosts, seasons, and Batrachochytrium dendrobatidis (Bd) infection status by sequencing the microbial communities of 1,100 leopard frogs at five locations across the US. Percent anti-Bd function varied seasonally and with Bd infection status. Bacterial communities also varied across locations and time. …

Design Framework Of Uav-Based Environment Sensing, Localization, And Imaging System, Yue Sun

Graduate Doctoral Dissertations

In this dissertation research, we develop a framework for designing an Unmanned Aerial Vehicle or UAV-based environment sensing, localization, and imaging system for challenging environments with no GPS signals and low visibility. The UAV system relies on the various sensors that it carries to conduct accurate sensing and localization of the objects in an environment, and further to reconstruct the 3D shapes of those objects. The system can be very useful when exploring an unknown or dangerous environment, e.g., a disaster site, which is not convenient or not accessible for humans. In addition, the system can be used for monitoring …

The Correlation Of Scientific Reasoning And Argumentation (Sra): An Analysis Into Prospective Biology Teachers In Plant Physiology, Maisuna Kundariati, Herawati Susilo, Balqis Balqis

Jurnal Pendidikan: Teori, Penelitian, dan Pengembangan

This study aimed to investigate the correlation of scientific reasoning and argumentation into prospective biology teachers in plant physiology discourse. This study was conducted at September-December 2021 through blended learning. Thirty prospective biology teachers get involved as participant in this research. Scientific reasoning and argumentation intervention trough PBL and measure by essay tests. Scientific reasoning indicator follows AACU. While scientific argumentation follow TAP. This research found there is correlation between scientific reasoning and argumentation, with R value of 0.556 which means that scientific reasoning skills and scientific argumentation are moderately correlated. The contribution of scientific reasoning to scientific arguments is …

Robust Estimates For One-Parameter Exponential Regression Model, Ahmed Joudah Irshayyid, Rabab Abdul Rida Al-Bakri

Journal of Economics and Administrative Sciences

One-parameter exponential regression is one of the most common and widely used models in several fields, to estimate the parameters of the one-parameter exponential regression model use the ordinary least square method but this method is not effective in the presence of outlier values, so robust methods were used to treat outlier values in the one-parameter exponential regression model are to estimate the parameters using robust method (Median-of-Means, Forward search, M-Estimation), and the simulation was used to compare between the estimation methods with different sample sizes and assuming four ratios from the outliers of the data (10%, 20%, 30%, 40%). …

Comparison Of Robust Circular S And Circular Least Squares Estimators For Circular Regression Model Using Simulation, Huda Hadib Abbas, Suhail Najim Abood

Journal of Economics and Administrative Sciences

In this paper, the Monte-Carlo simulation method was used to compare the robust circular S estimator with the circular Least squares method in the case of no outlier data and in the case of the presence of an outlier in the data through two trends, the first is contaminant with high inflection points that represents contaminant in the circular independent variable, and the second the contaminant in the vertical variable that represents the circular dependent variable using three comparison criteria, the median standard error (Median SE), the median of the mean squares of error (Median MSE), and the median of …

A Comparison Of A Radial Basis Function Neural Network With Other Methods For Estimating Missing Values In Univariate Time Series, Wasn Saad Mahdi, Firas A. Mohammed Almohana

Journal of Economics and Administrative Sciences

Missing values in the time-series data set have an impact on the correct decision-making in the future. Since complete data helps to obtain high accuracy in the estimation process, the reason for missing values is a malfunction of the measuring device or an error in the data entry process by the person. The research aims to compare the radial basis function methods with other methods to estimate missing values in univariate time series data. the simulation method was used to compare the methods to estimate the missing values, and that was used the Box-Jenkins model AR(1) once with the value …

Security And Confidentiality Of Information Under The Application Of Cloud Accounting Compared To Traditional Accounting, Kawa Wali, Bnar Karim Darwish, Shadan Jabbar Abdulfattah

Journal of Economics and Administrative Sciences

Traditional matrix-based methods and common statistical formulas often require extensive time, effort, and the organization of numerous complex tables. The authors propose this alternative method as a more efficient and user-friendly tool for researchers. By reducing the mathematical burden of manual calculations in high-factor experiments, the study contributes a practical advancement to the field of experimental design, demonstrating through application that the suggested method maintains accuracy while significantly enhancing computational ease compared to standard procedures.

Using Some Estimation Methods For Mixed-Random Panel Data Regression Models With Serially Correlated Errors With Application, Musaab Amer Rajab, Mohammed Sadiq Al-Doori

Journal of Economics and Administrative Sciences

This research includes the study of dual data models with mixed random parameters, which contain two types of parameters, the first is random and the other is fixed. For the random parameter, it is obtained as a result of differences in the marginal tendencies of the cross sections, and for the fixed parameter, it is obtained as a result of differences in fixed limits, and random errors for each section. Accidental bearing the characteristic of heterogeneity of variance in addition to the presence of serial correlation of the first degree, and the main objective in this research is the use …

Solar Irradiance Forecasting Using A Novel Hybrid Deep Ensemble Reinforcement Learning Algorithm, Seyed Mohammad Jafar Jalali, Sajad Ahmadian, Bahareh Nakisa, Mahdi Khodayar, Abbas Khosravi, Saeid Nahavandi, Syed Mohammed Shamsul Islam, Miadreza Shafie-Khah, João P. S. Catalão

Research outputs 2022 to 2026

Solar irradiance forecasting is a major priority for the power transmission systems in order to generate and incorporate the performance of massive photovoltaic plants efficiently. As such, prior forecasting techniques that use classical modelling and single deep learning models that undertake feature extraction procedures manually were unable to meet the output demands in specific situations with dynamic variability. Therefore, in this study, we propose an efficient novel hybrid solar irradiance forecasting model based on three steps. In the first step, we employ a powerful variable input selection strategy named as partial mutual information (PMI) to calculate the linear and non-linear …

Analysis Of Methods Of Construction And Application Of Modern Anti-Radar Missiles, A S. Solonar, P A. Khmarski, B M. Mukhammedov, G Sh Tuganov

Technical science and innovation

The analysis of methods of construction and application of modern anti-radar missiles (ARM) is carried out. The analysis allowed us to identify the most distinctive features of ARM such as: high flight speed (600-1200 m/s), limited launch range, different flight paths and it is oriented towards the attacked radar, small effective distribution surface (ESR), due to a sharp increase in the weight and size characteristics of the homing head of the homing head outside the frequency range (from 0.5 to 40 GHz), radio electronic means of the ARM are not created, the large range and high speed of tuning the …

Universitas Indonesia’S Science And Technology (Iptek) Global Partnership Impact Towards The Sustainability Of Indonesia’S Knowledge-Based Economy Through Moderating Variables, Maruf Akbar, Matin Matin, Rini Sari

Journal of Environmental Science and Sustainable Development

Global Innovation, science and technology performance is one of the essential problems that Indonesian universities face. Currently, sciences and technology (IPTEK)’s partnership among university, government, industry, and Indonesia’s society have not been conducted optimally. This paper discusses the impact of the relationship between university’s science and technology global partnership, QS/world university ranking, university/industry research collaboration with sustainability knowledge-based economy (KBE) as well as suggesting some possible solutions for optimization. The investigation was followed by a cause-and-effect analysis that was gained from several secondary data and reports such as Global innovation Index (GII), UI Scholar, QS, THE, SINTA, ASEAN Benchmarking’s data …

The Potencial Of Ginger (Zingiber Officinale R.) As A Standardized Herbal Product In North Sumatera, Rahmad Syukur Siregar, Rika Ampuh Hadiguna, Insannul Kamil, Novizar Nazir, Nofialdi Nofialdi

Journal of Environmental Science and Sustainable Development

Indonesia has more than 9,609 plant species which have medicinal properties that is spread across various regions in Indonesia. Ginger is a group of medicinal plants that are therapeutic. Ginger has been cultivated on a large scale with the highest harvested area, total production and demand in Indonesia, including the Province of North Sumatra. The use of ginger as a medicinal plant has been carried out on the scale of the Traditional Medicine Industry (IOT), of which there are 135 IOTs in Indonesia and one of them is in North Sumatra, namely in the city of Medan. This article uses …

A Study Of Technology Availability For Recycling Low Value Plastic In Indonesia, Prawitya Soemadijo, Faiza Anindita, Dini Trisyanti, Rangga Akib, Mariati Abdulkadir, Noverra M. Nizardo, Rizka Legita Rachmawati

Journal of Environmental Science and Sustainable Development

Plastic has been an essential part of our daily life. However, the increasing plastic consumption has led to an increasing land and water contamination by said plastics. The Indonesian government has set five actions on managing marine plastic debris, one of them is by improving the plastic recycling system. Multilayer plastic was identified as a challenge to the plastic waste recycling. This is because there are differences in properties, such as melting point, which will cause difficulty in mechanical recycling. This study aims to create a mapping of available options to solve problems of low value plastic (LVP) waste in …

Information Sustainability Of Islamic Education Centers Through Website Digitization, Renny Nurhasana, Nurul Muhafilah, Nur Arning Tengara Kasih

Journal of Environmental Science and Sustainable Development

Islamic education of Taman Pendidikan Al-Quran (TPA) is an Al-Quran Learning Center that gives informal religious education to guide children to know Islamic values from an early age. TPA Ikhlasul Machfudz was established since 2006 that, in addition to Al-Quran, the center also teaches children with English, Marawis (voices with strong religious elements) and Qasidah (lyrics that are related to Islamic values). However, since the COVID-19 pandemic occurred in 2020, the learning process has stopped completely due to the policy of learning from home. There are many obstacles to teach from home using online learning method. Teachers realized the importance …

Exploratory Study On Human Factors Affecting Safety In The Shipyard Of Pakistan, Bisma Khan

World Maritime University Dissertations

The study of human factors has emerged as a critical element in understanding and improving the safety requirements of Pakistan’s shipyard. The dissertation attempts to study human factors in the risk-based environment and challenging duties of the employees associated with shipyard resulting in accidents and injuries.

While technology and equipment contribute to safety, human actions, decisions, and behaviours often play a critical role in causing accidents. As the number of accidents was increasing in the shipyard, the researcher realised the need to explore contributing factors. A quantitative survey approach was adopted to collect information. The results were compared among employees …

Economic Implications Of International Energy Trade : A Comparative Analysis Across Developed, Developing, And Least Developed Nations, Mmaduabuchi Chigozie Emeghebo, Bintou K.B. Janneh, Semeria Youlo Maurice

World Maritime University Dissertations

Energy trade and consumption constitute vital components of international trade, a significance that has been amplified by escalating global industrialization and globalization. Nonetheless, the patterns of demand, trade, and utilization of energy differ markedly across various categories of economies, as delineated by the United Nations into Developed, Developing, and Least Developed Nations.

This study endeavors to elucidate the influence of international energy trade and consumption on the economic development trajectories of these three distinct categories of nations. Employing linear panel regression methodologies on panel data sets spanning the period from 1995 to 2021 for each category, the analysis reveals that …

Quantifying The Effects Of Guessing, Position Bias And Prior Knowledge In Multiple Choice Exams, Almasi S Maguya

Tanzania Journal of Science

“Can an examinee pass a multiple-choice (MC) exam by chance?” Many studies have tried to address this question. However, these studies ignore different types of position bias associated with picking an item from a list. Despite the presence of considerable evidence on the existence of position bias in guessing answers in MC exams, these studies assume an examinee chooses answers with equal probability. This paper seeks to fill this gap by quantifying the chance of success in MC exams due to guessing when different types of position bias and prior knowledge are taken into consideration. The paper proposes a probabilistic …

Spatiotemporal Variability Of Drought And Its Relationships To Enso And Iod Indices In Somaliland, Mohamed S Bile, Paul Ts Limbu

Tanzania Journal of Science

Drought is one of Somaliland’s most prevalent natural hazards, causing serious socioeconomic and environmental harm. This study investigated the spatial and temporal variability of drought and its relationships with El Niño Southern Oscillation (ENSO) and Indian Ocean Dipole (IOD) indices using the Standardized Evapotranspiration Index (SPEI) from 1981 to 2020. The Mann-Kendall trend test and Sen's slope estimator were used to assess the trends of annual and seasonal SPEI time series. The Empirical Orthogonal Function (EOF) was employed to examine the dominant modes of the SPEI series, and Pearson and partial correlation analyses were performed to investigate the associations between …

Impacts Of Climate Change On Small Pelagic Fish Catches In The Coastal Artisanal Fishers Communities Of Tanzania, Lyidia Kapapa, Paul Onyango Onyango, Nibedita Mukherjee, Prosper Mfilinge

Tanzania Journal of Science

Climate-related effects occur across all regions in Tanzania, affecting primary sectors such as agriculture and fishing. This study investigated the impacts of climatic change on small pelagic catches in fishers in Kilindoni, Kipumbwi and Kilwa Kivinje villages along the Tanzanian coast. We studied how changes in rainfall, sea surface temperature, wind speed and chlorophyll a affect small pelagic fisheries using primary and secondary data. Qualitative and quantitative methods were applied. Primary data collection involved questionnaires, focus group discussions and key informant interviews. Secondary data was obtained from Tanzania Meteorological Agency and remote sensing from Modi's sensor. Results showed an increase …

Performance Investigations Of The Charging And Discharging Processes In A 3-Tank Thermal Energy Storage System, Swalehe Tusiime, Karidewa Nyeinga, Denis Okello, Ole J. Nydal

Tanzania Journal of Science

The paper presents a 3 tank thermal energy storage system. The system consists of cold oil reservoir, heat storage tank, and a residual drainage tank. Cold oil flows by gravity into a heating chamber and after being heated to the required temperature, a mechanical thermostat opens allowing the hot oil to flow into a heat storage tank. The storage tank was discharged through the cooking unit by boiling 0.5 litres of water. The used oil flowed by gravity to the drainage tank. The discharge flow rates of 0.5, 2.1, 2.8 and 6.5 g/s were considered. A charging efficiency of 51.3% …

Chemical Analysis, Antibacterial Activities And Uses Of Leaves And Calyces Of Hibiscus Sabdariffa Grown In Dodoma, Tanzania, Sartaz Begum, Derick R. Mwakimbwala, Gideon Sangiwa, Valence M.K. Ndesendo

Tanzania Journal of Science

Preliminary phytochemical screening of aqueous and ethanolic extracts of Hibiscus sabdariffa grown in Tanzania revealed the presence of secondary metabolites like steroids, tannins, saponins, glycosides, terpenoids, flavonoids along with L-ascorbic acid (vitamin C) and iron(II). Furthermore, both leaves and calyces showed antibacterial activities (agar well diffusion method) against selected bacterial species (Escherichia coli, Staphylococcus aureus, Salmonella typhi and Shigella sonnei), but calyces possessed potent antibacterial activities compared to leaves. The results also supported the claimed traditional uses of this plant. When interrogated during the cross-sectional study in Dodoma region, 54% of the respondents claimed the plant is used to treat …

Constraining The Origin And Age Of The Thermal And Cold Water In The Lake Natron Basin, Northern Tanzania, Edista A. Abdallah, Charles H. Kasanzu, Crispin P. Kinabo, Akira Imai, Mike J. Butler

Tanzania Journal of Science

Springs on the eastern and western shores of Lake Natron Basin (LNB), located within the eastern branch of the East Africa Rift System (EARS) in Northern Tanzania had a discharge temperature that ranged between 34.0 °C and 51.2 °C, while the pH varied from 8.0 to 10.7. The electrical conductivity (EC) ranged between 5,007 µS/cm and 49,200 µS/cm. Cold waters had a temperature of 31.9 °C to 32.5 °C, while the pH ranged between 8.0 and 8.3, and the EC ranged between 1,401 µS/cm and 3,806 µS/cm. The stable isotope composition varied between -2.4 ‰ and -5.3 ‰ for δ18O, …

Explicit Solutions For Real-Time Reversible Inhibition Kinetics Using Lambert W Function: Towards Progress Curve Analysis, Geradius Deogratias, Makungu Madirisha, Fortunatus Jacob

Tanzania Journal of Science

Accurate estimation of kinetic parameters is challenging due to the dynamics and mathematical nature of the chemical systems. This paper presents simple, yet efficient closed-form solutions for the enzymatic conversion of the substrate to the product in real-time derived using the Lambert W function. The real values of the Lambert W function were calculated from the Lambert package as implemented in MATLAB. The expressions exhibit remarkable robustness in estimating the parameters for randomized data at 1% to 4% variation in noise levels. Furthermore, unlike the initial rates method, the expressions estimate chemical kinetic parameters utilizing a full range of experimental …