Digital Commons Network^™

Stability Analysis Of Dc Microgrid With Constant Power Load, Sarah Ansari

Theses and Dissertations

Development towards sustainability has led to an increase in the integration of various distributed generation (DG) units like renewable sources of energy, energy storage systems (ESS). In order to counteract the challenges, caused due to integration of DG units into conventional power systems, the concept of DC microgrid (DCMG) has been introduced. DCMGs have power converters that are present on the source side and load side of the DCMGs. The power converters at the load side when tightly regulated behave as constant power loads (CPLs). There are stability issues pertaining to the inherent non-linear characteristic of the ideal CPLs because …

Design Considerations For Hvac Systems In Wide-Body Commercial Aircraft, Reuben Smith

Mechanical Engineering and Materials Science Independent Study

MEMS 500 (MEMS 5420) was an independent study course using the text “Heating, Ventilating, and AirConditioning” authored by McQusiton, Parker and Spitler (6th Edition). The course included the material up to and including the space heating load. The cooling load material was covered during the use of the TRACE 700 software developed by the Trane Company. The report presented herein was an additional requirement of the course. This report provides an introductory overview to the technical considerations required when establishing the design conditions for heating, ventilation, and air-conditioning system selection in a wide-body commercial aircraft. Rather than focusing on specific …

Health Care In Metropolitan Manila During The American Colonial Era: A History Of The Management Of Infectious Diseases And Its Effects On The Practice Of Chinese Medicine (English Translation), Peng Hui, Ziyang Huang, Franz David Ong Lim

Social Transformations Journal of the Global South

Since the American occupation of Manila, the health care system of the Philippines was transformed with its goal of “modernizing the Philippines.” Systematic Western prevention and control measures and institutions were established. This in turn affected the practice of Chinese medicine, which was present since the Spanish period. With the help of Dr. Tee Hankee and other doctors, local Chinese medicine gradually developed into a combination of Chinese and Western medicine through the developments of the Chinese General Hospital and the establishment of the Filipino Chinese Western Medicine Association. The melding of Chinese and Western medicine formed a distinctive Philippine …

Flexible Microfluidic Device With Nonplanar Interdigitated Microelectrodes, Saud Alssaidy

Theses

The lab-on-a-chip concept has improved significantly in recent years to meet global demand for various applications with the advent of new technologies. Much progress has been achieved, but many microfluidic devices still suffer from design limitations in terms of sensitivity and selectivity because they use rigid, fragile substrate materials and conventional electrodes, which do not provide high sensitivity or selectivity and suffer from signal-to-noise ratio issues. This work proposes a novel device architecture that uses flexible, transparent top and bottom layers integrated with (nonplanar interdigitated microelectrodes) to create a sandwich-like flexible substrate base. The top and bottom layers consist of …

Development Of Virlenda-Based Blended Learning With Problem Based Learning Strategy For Problem-Solving Ability For Students, Achmad Noor Fatirul, Subandowo Subandowo

Jurnal Pendidikan: Teori, Penelitian, dan Pengembangan

This study aims to develop a Virlenda-based blended learning model. The products that will be produced develop learning tools with problem-based learning strategies, problem-based evaluation tools, supplements for lecturers and students and the Virlenda learning management system as a forum for carrying out the learning process. The results of the research are design experts with 85.8% validation percentage, material experts with 86.5 validation percentages, media experts with 87.7% validation percentages, 86.5% validation percentages for colleagues. In the small group trial the percentage of responses was 82.7%, for the medium group trial the percentage of responses was 89.6%, while in the …

Training Kit And Module On Plc Programming Competence For Students Of Electrical Engineering Education, Puput Wanarti Rusimamto, Munoto Munoto, Muchlas Samani, I G.P. Asto Buditjahjanto, Endryansyah Endryansyah, Subuh Isnur Haryudo

Jurnal Pendidikan: Teori, Penelitian, dan Pengembangan

This research aims to determine the validity and practicality of training kit and PLC learning module as an instructional media for PLC course for students of electrical engineering education at Universitas Negeri Surabaya. That was development research using Thiagarajan’s 4D models, this study only used the first three stages, not up to the disseminating stage, as the researcher only developed the training kit and module. The design of the training kit and module were developed and validated based on the look of the product, the quality of the media, and the suitability of the media for the curriculum and illustrations. …

Struggle For Substantive Justice And Community Development: Transgender Subjects In Contemporary India, Pushpesh Kumar

ASEAN Journal of Community Engagement

This paper discusses the transgender community's fight for justice and developmental rights since 2014 and the response of the Indian Government toward this assertion. The point of choosing 2014 as the starting point is not because the fight for their justice actually begins in this year but because India witnessed an intensification and an increase in public visibility of transgenders’ mobilization following the recognition of members of transgender communities as legal citizens through the landmark Indian Supreme Court (Court) verdict called the National Legal Services Authority Union of India (NALSA). In documenting transgenders’ mobilization and the state's response, the author …

International Student Collaboration In Efforts To Raise Public Awareness Of Covid-19 Prevention, Faisal Husen Ismail, Rohmah Rohmah, Intan Nur Syaheera Ibrahim, Cheam Kai Wen

ASEAN Journal of Community Engagement

This study evaluates the enforcement of public health protocols in deciding the COVID-19 distribution chain. The evaluation is based on contributions among international students in higher education and examined their experiences and activities engaging in activities against the COVID-19 epidemic. The research focuses on the collaborative activities of students of Universiti Tun Hussein Onn Malaysia with Sultan Maulana Hasanuddin State Islamic University Banten, Indonesia. Through observation and direct and online involvement with the community, the study is qualitative and employs an inductive approach. Survey feedback was received in collaboration with five students from each university. This study is qualitative using …

Higher Education Institution Research Dissemination And Utilization Through The Lens Of Community Engagement, Vincent M. Clores

ASEAN Journal of Community Engagement

Using community involvement as a lens, this study analyzed the amount of distribution and utilization of a public higher education institution's research outputs in Bicol, Philippines. The Diffusion and Dissemination Theory alongside the use of Knowledge For health (K4Health) of the United States Agency for. International Development (USAID) Model served as the theoretical and conceptual underpinnings of this study that facilitated the analysis of research produced by the institution, its dissemination, the enablers, and barriers, and until utilization. The case study design was used to portray an in-depth analysis of the institution’s situation from research output generation to the enablers …

The Evolution Of The Internet And Social Media: A Literature Review, Charles Alves De Castro, Isobel O'Reilly Dr, Aiden Carthy

Articles

This article reviews and analyses factors impacting the evolution of the internet, the web, and social media channels, charting historic trends and highlight recent technological developments. The review comprised a deep search using electronic journal databases. Articles were chosen according to specific criteria with a group of 34 papers and books selected for complete reading and deep analysis. The 34 elements were analysed and processed using NVIVO 12 Pro, enabling the creation of dimensions and categories, codes and nodes, identifying the most frequent words, cluster analysis of the terms, and creating a word cloud based on each word's frequency. The …

Gender Differences In Academic Productivity Within Pediatric Dentistry Departments In Turkey, Basak Kiziltan Eliacik, Meltem Karahan

Journal of Dentistry Indonesia

Objective: To investigate the differences in the academic productivity of male and female academicians from the departments of pediatric dentistry in the Faculties of Dentistry in Turkey. Methods: A search was made of international studies indexed in PubMed published up until January 2021 by a total of 241 academicians in the Departments of Pediatric Dentistry of 79 Faculties of Dentistry in Turkey. The total number of international publications for each faculty member was obtained from the institutional websites and thorough searches of PubMed and Web of Science. H-index and the number of citations were established through an advanced search of …

We Can Make A Better Use Of Orcid: Five Observed Misapplications, Miriam Baglioni, Paolo Manghi, Andrea Mannocci, Alessia Bardi

Copyright, Fair Use, Scholarly Communication, etc.

Since 2012, the “Open Researcher and Contributor ID” organisation (ORCID) has been successfully running a worldwide registry, with the aim of “providing a unique, persistent identifier for individuals to use as they engage in research, scholarship, and innovation activities”. Any service in the scholarly communication ecosystem (for example., publishers, repositories, CRIS systems, etc.) can contribute to a non-ambiguous scholarly record by including, during metadata deposition, referrals to iDs in the ORCID registry.

The OpenAIRE Research Graph is a scholarly knowledge graph that aggregates both records from the ORCID registry and publication records with ORCID referrals from publishers and repositories worldwide …

Non-Consensual Disclosures, Nina Varsava

BYU Law Review

In the course of biomedical research on humans — for example, flu, imaging, and genomic studies — researchers often uncover information about participants that is important to their health and wellbeing. In many cases, the information is not anticipated in advance, and participants did not consent to receiving it. This Article examines the law and policy governing human subjects research, focusing on the set of regulations known as the "Common Rule." I argue that human subjects researchers will often have strong ethical reason s to disclose results even when participants did not consent to the disclosure in advance. I also …

Outlier And Homogeneity Analysis Of Extreme Rainfall Series In Kano, Nigeria, Abdulrasheed Mohammed, Salisu Dan’Azumi, Abubakar Ahmed Modibbo

Platform: A Journal of Engineering (PAJE)

Data preparation is one of the most important steps in the field of hydrology since the results of any research depend on whether the input data were reliable and rightly collected or not. Reliability and quality of long-term rainfall data are required before carrying out any study in hydrology. For this reason, outlier identifcation techniques and homogeneity tests have proved helpful. This study aimed at carrying out outliers and homogeneity analysis of extreme rainfall data series for the Kano rainfall gauging station. XLSTAT, 2019 was used to identify outliers through Grubb’s test for outliers/two-tailed test and Dixon test for outliers/two-tailed …

Characterization Of Malaysian Jatropha Seed Oil Using Ftir And Gcms, Mathanraj Jayagobi, Amni Haslinda Alpandi, Hazlina Husin

Platform: A Journal of Engineering (PAJE)

Flow assurance problems such as wax deposition impacted the oil and gas industry in various points of oil transport hence a cure is widely researched. This paper aims to establish a cure by using Jatropha curcas seed oil (non-edible) originated from Malaysia and its sustainability as a wax inhibitor component. Extraction and characterization of Jatropha seed oil using Fourier Transform Infrared Spectroscopy (FTIR) and Gas Chromatography-Mass Spectrometry (GCMS) were conducted to identify the properties of Jatropha seed oil such as the presence of oleic acid which is the main component required in wax inhibitor. Jatropha seed oil extraction was conducted …

Design Improvement Of The Vertical Axis Wind Turbine With Applied Flaps Through Cfd Analysis, Abdulla Khamis, Mohanad Tarek Abdallftah, Mohammed Fares, Salman Shahid, Sharul Sham Dol

Platform: A Journal of Engineering (PAJE)

This research aims to optimise VAWT power generation capabilities through the design alteration of blades by the addition of faps. The application is aimed to be applied in the United Arab Emirates, specifically at Abu Dhabi University campus in Al Ain to replace a margin of the consumed electrical energy (15%) powered by the typical non-renewable energy means. To study the effects of design alteration, relevant design parameters on the aerodynamic properties of the wind turbine, a typical standard design with standard dimensions were considered and used as a benchmark for comparison. Two aerodynamic simulation software were adopted, namely ANSYS …

An Ineffective Institutional Investors Law In Indonesia? Why Bother, Luther Lie, Yetty Komalasari Dewi

Indonesia Law Review

Corporate governance failures are one of the major factors that have crippled the Indonesian economy through financial crises. In response, the OECD has prescribed Principles II and III of the G20/OECD Principles of Corporate Governance to ensure the rights and equitable treatment of all shareholders and the acknowledged role of institutional investors in improving corporate governance. Institutional investors play a significant role as corporate monitors in protecting the public investors’ money and improving corporate financial performance. They are therefore acknowledged as the policies of economic crises, creators of firm values, and drivers of economic development. However, as this paper explains, …

Community Participation On Waste Bank To Facilitate Sustainable Solid Waste Management In A Village, Indriyani Rachman, Nia Komalasari, Ira Rumiris Hutagalung

Journal of Environmental Science and Sustainable Development

Community participation is required for managing solid waste. In Indonesia, community acceptance and participation in solid waste management are assessed by the presence of a waste bank at the village or neighborhood level. This study aimed to find out the source, economic potency, and handling system of solid waste in a village setting. This study took place at Ketapang Village, Mauk Sub District, Tangerang Regency, Indonesia. This study evaluated the community participation in the waste bank in Ketapang Village, which is called, Sakumis Bersalaman Waste Bank, and its potential to manage solid waste and generate some profits for …

Social Media Usage And Transitioning Into Online Classes During Covid-19- A Survey Of Undergraduate Students In Georgia, United States, Sylvia Ofori, Janet Choongo, Mario Kekop, Gulzar H. Shah, Haresh Rochani, Joseph Telfair

Health Policy & Community Health: Faculty Publications

Previous studies on the use of social media (SM) during the COVID-19 pandemic have focused on the use in sustaining academic communication. This study aimed to assess the association between SM and the ease of transitioning to online classes during the COVID-19 pandemic using survey data from 872 undergraduate students. The findings showed that Snapchat and Instagram were the most preferred social media sites among participants. Compared to students who use SM for < 2 hours a day, use for > 5 hours (AOR= 2.44; 95% CI, 1.13 – 5.25) or 3 to 5 hours a day (AOR = 2.01, 95% CI 1.06-3.81) increased the odds of easily …

Optical And Chemical Properties Of Fragaria Ananassa And Galena: Potential Photosensitizers In A Natural Dye-Sensitized Solar Cell, Ibukun S Akinsola, Aderemi B Alabi, Coppede Nicola

Tanzania Journal of Science

Dye is one of the major components for high power conversion efficiency in a dye-sensitized solar cell. There are challenges natural dyes encounter, especially with quick degradation of the dye molecules. This work considered mineral dye in comparison with plant dye to address the challenge of degradation of natural plant dyes. The optical properties and functional groups of the two natural dyes were studied in this work. The absorption spectra, the optical band gaps and the absorption coefficients of the dyes were reported and found to be suitable for use as photosensitizers in a dye-sensitized solar cell (DSSC), as they …

Rural Electrification Using Iliceto Shield Wire Scheme In Developing Countries: Tanzania Case Study, Heavenlight M Munisi, Santos Kihwele

Tanzania Journal of Science

Rural electrification rate in Tanzania is still very low despite the efforts made by the Rural Energy Agency (REA) in Tanzania. Rural electrification using medium voltage (MV) method has two major obstacles. First obstacle is high cost associated with the cost of extending the grid electricity to rural areas. Second obstacle is remoteness of the villages, which leads to high power loss during transmission. In lieu of economic extension of rural electrification areas, this paper proposes a low cost solution of Iliceto Shield Wire Scheme (ISWS). This technique involves insulating shield wires (SW) from high voltage (132-400 kV) transmission line …

Determination Of Cramer-Rao Lower Bound (Crlb) And Minimum Variance Unbiased Estimator Of A Dc Signal In Awgn Using Laplace Transform, Abdi T. Abdalla

Tanzania Journal of Science

This paper presents an alternative approach for the determination of Cramer-Rao Lower Bound (CRLB) and Minimum Variance Unbiased Estimator (MVUE) using Laplace transformation. In this work, a DC signal in Additive White Gaussian Noise (AWGN) was considered. During the investigation, a number of experiments were conducted to analyze different possible outputs under different conditions, and then the patterns of the outcomes were studied. Finally closed-form expressions for the CRLB and MVUE were deduced employing the Laplace transformation. The resulting expressions showed that the proposed method has almost the same number of steps as the existing method. However, the latter requires …

Physico-Chemical Properties Of Mechanically Extracted Banana Juice At Different Ripening Stages, Mathayo G Mathias, Lilian D Kaale, Oscar Kibazohi

Tanzania Journal of Science

This paper presents the findings of a study on physico-chemical properties of low viscosity banana juice from five banana cultivars: Pisang Awak (PSA) an ABB genome, Yangambi km5 (YKM5) an AAA genome and cultivars from AAA-EA genome, namely Mbilabile, Ndeshi and Mlonga. Low viscosity banana juice was extracted using improved mechanical method at five ripening stages. The physico-chemical properties significantly varied according to cultivars and ripening stages (p < 0.05). Yields, total soluble solids (TSS), titratable acidity (TA) and pH were in the range of 19.50–74.03%, 7.33–27.64 ºBrix, 0.37–0.76% malic acid equivalent and 4.09–4.70, respectively. Yields decreased in the order of Mbilabile > Ndeshi > Mlonga > YKM5 > PSA whereas the total soluble solids increased as follows Mlonga < Mbilabile < Ndeshi < YKM5 < PSA. Furthermore, ashes and mineral contents decreased with ripening stages whereas the low viscosity banana juice was rich in potassium and magnesium. Finally, the study recommends stage 5 of the ripeness as ideal for producing low viscosity banana juice. Keywords: Mechanical extraction, Banana cultivar, Ripening stage, Tannin, Banana juice.

Optimal Design Of Hybrid Renewable Energy For Tanzania Rural Communities, Ester T Marcel, Joseph Mutale, Aviti T Mushi

Tanzania Journal of Science

Rural communities in developing countries lack access to electricity due to high costs of grid extension. This paper proposes a hybrid system of renewable energy (HRES) as solution. The HRES consists of solar, wind, and battery energy storage (BES). The village called Ngw’amkanga in Shinyanga region of Tanzania, East Africa is selected as a case study. An iterative method to determine the size of wind and solar photovoltaic (PV) generation required assuming a project life of 25 years at minimum annualised cost of the system ( ) is proposed. The project life time is fixed on the life span of …

Application Of F-Waspas In The Ranking Of Crops For Agro-Processing: The Case Of Ikondo Ward In Njombe, Tanzania, Benito G Mng'ong'o, David Koloseni

Tanzania Journal of Science

The purpose of this work was to develop and apply a Fuzzy Weighted Aggregated Sum Product Assessment (F-WASPAS) method in ranking selected crops for agro-processing at Ikondo Ward in Njombe Region, Tanzania. The fuzzy technique for order preferences by similarity to ideal solution (TOPSIS) was applied in determining the fuzzy importance weights of criteria, while the fuzzy WASPAS successfully ranked the crops, and maize was ranked the highest. Keywords:    F-WASPAS, Linguistic variables, Fuzzy aggregation, Agro-processing, Decision making, Multi-Criteria Decision Making.

Preparation, Characterization, And Antimicrobial Activities Of Mixed Ibuprofen-Salicylic Acid Metal-Drug Complexes, Mercy O Bamigboye, Ikechukwu P Ejidike, Racheal O Awolope, Joshua A Obaleye, Favour K. Ejimofor

Tanzania Journal of Science

Most variants of bacteria are resistant to traditional antibiotics which are organic. To overcome the growing infections, bacteria resistant infections, and multiple drug resistance (MDR) rates, transition metals with biological importance were coordinated to organic ligands (Ibuprofen and Salicylic acid) with anti-inflammatory properties. In this study, metal complexes of mixed Ibuprofen and Salicylic acid were prepared using a standard method to give of the type [M(Ibu)(Sal)X] (where M = Fe2+, Ni2+, Cu2+, and X = Cl2, Ibu = Ibuprofen, Sal = Salicylic acid). The complexes were characterized by UV-visible spectroscopy, conductivity measurements, melting points, FT-IR, and X-ray diffraction. The metal …

Identification And Characterization Of Cassava Mosaic Begomoviruses In Non-Crop Plants From Unguja And Pemba Islands, Joseph A. Mwakosya, Gladness E. Temu, Joseph C. Ndunguru

Tanzania Journal of Science

Cassava mosaic disease caused by cassava mosaic begomoviruses (CMBs) remains one of themajor constraints to cassava production since it causes yield losses up to 100%. Researchesshowed that some of CMBs infecting cassava plants may be coming from non-crop plants. Thisstudy intended to identify and characterize CMBs isolated from non-crop plant species inUnguja and Pemba Islands. A total of 108 viral symptomatic and asymptomatic non-crop leafsamples were collected using stratified sampling. DNA was extracted by using CTAB protocolfollowed by polymerase chain reaction using universal and specific primers for cassava mosaicbegomoviruses identification. Results showed that, among eleven samples that were amplified,four were …

Green Building Rating System (Gbrs) As A Tool To Improve Sustainability Performance Of Buildings In The Built Environment Of Nigeria, Akeem Bolaji Wahab, Adefunke Taiwo Jegede

Journal of Environmental Science and Sustainable Development

In the worldwide, the impacts associated with the use of technological innovations and developmental processes in the built environment through the construction of buildings are phenomenal. This is noticeable in the literature on the role of green building practices in building construction, building operation and optimization, and building management; respectively. This has led stakeholders and policy drivers to adopt principles of sustainability by producing green building rating systems to assess building stock at different stages of their life cycle. Dealing with the issue, this paper aimed to review various attempts made by selected nations and other stakeholders to produce green …

Pengaruh Model Argument-Driven Inquiry-Stem-Efa Terhadap Peningkatan Scientific Reasoning Skills Siswa, Nadya Dewi Arofah Mochsif, Parno Parno, Lia Yuliati

Jurnal Pendidikan: Teori, Penelitian, dan Pengembangan

This research examines the effect of the STEM-EFA integrated ADI model for improving students' scientific reasoning skills. The research was conducted in class XI of SMAN 8 Malang with 27 students participating. Learning is carried out by emphasizing practical activities, doing arguments, and making simple stove prototypes. The student’s enhancement of scientific reasoning skills was measured from the results of the pretest and posttest using two-tier questions. The analysis showed that there was a significant increase with p = 0.000. These results indicate that the STEM-EFA integrated ADI model influences increasing scientific reasoning skills. The N-Gain calculation of 0.34 indicates …

Bowtie Method: Study Of Occupational Health And Safety Risks In Cement Production Process, Ezmeyralda Putri, Mona Lestari, Novrikasari Novrikasari, Desheila Andarini, Anita Camelia, Poppy Fujianti, Titi Nurhaliza

Media Kesehatan Masyarakat Indonesia

The kiln area is an area that has a very complex hazard potential in the cement production process. This study aimed to assess the risks of occupational safety and health during the production process in the kiln area of ​​PT. X uses the bowtie method. This study used a qualitative descriptive design. The informants used were three managers of the clinker production department, one safety manager, and one field operator. Research data were collected through interviews and observations. The data were analyzed qualitatively using the bowtie method. The study results stated that hot dust could be dangerous if it comes …