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Review On Gas-To-Liquids Conversion Technology: Lessons From Case Studies And Potential Strategies For Implementation In Tanzania, Joseph H. Kihedu

Tanzania Journal of Engineering and Technology (TJET)

This review paper explores the transformative potential of Gas-to- Liquids (GTL) technology for harnessing Tanzania's vast natural gas resources. With significant discoveries of natural gas reserves totalling up to 57 Tcf in fields such as Songosongo, Mnazi Bay, Block 1, 2, 3 and 4. Tanzania is positioned to leverage GTL technology to convert these resources into high-value liquid fuels like gasoline, diesel and naphtha. Review of GTL process, its products and applications has been done. By analysing successful GTL projects globally and drawing lessons applicable to Tanzania, this paper provides strategic recommendations for policymakers and stakeholders to foster GTL development. …

A Review Of Lithium-Ion Battery Capacity Fade Deceleration At Power Fluctuations In Renewable Energy Systems, Isaac Gwayi

Tanzania Journal of Engineering and Technology (TJET)

Application of lithium-ion (Li-ion) batteries to store energy in renewable energy systems (RESs) is increasing due to their promising properties. Therefore, it is crucial to understand aging behaviours of Li-ion battery during RES life time as this directly affects cost of energy. Li-ion battery aging can be categorised into calendar aging and cycle aging. Calendar aging depends mainly on temperature and state of charge (SoC). In addition to temperature and SoC, cycle aging depends also on charge and discharge current rates and cut-off voltages. Higher current rates lead to faster Li-ion battery aging. It is necessary to identify appropriate battery …

Assessment Of Maintenance Performance Level Of Selected Hydropower Plants In Tanzania, Mahamudu H. Mtebwa

Tanzania Journal of Engineering and Technology (TJET)

Despite significant progress in increasing electricity access to over 78%, electricity reliability in Tanzania remains a concern, with frequent power outages reported. Maintenance issues in hydropower plants have been identified as a critical factor contributing to this problem. However, the specific maintenance performance levels have not been fully assessed. This study conducts a comprehensive evaluation of the maintenance performance of four key hydropower plants: Kidatu (204 MW), Kihansi (180 MW), Mtera (80 MW), and New Pangani Falls (68 MW). Data collected from staff surveys and maintenance records between 2018 and 2022 were used in the study. Although staff demonstrated a …

Scoring System For Screening Fitness To Work For Offshore And Onshore Remote Area Worker, Kasyunnil Kamal

Occupational and Environmental Medicine Journal of Indonesia

Background: About 10-15% of medical examinations of workers at upstream oil and gas companies are not conducted properly. In some cases, workers die at worksites. Many doctors carrying out the assessment lack the competency to assess occupational risks. In this study, we developed a scoring system for ‘fitness for work’ assessment, which can be used by trained doctors.

Methods: Diagnostic testing was done with comparing the results of the determination screening fitness for work using a scoring system with the determine fitness for work results by Occupational Medicine Specialist as a gold standard in the same group. The entire 607 …

Design And Control Of A Versatile Modular Soft Robotic System With Integrated Resource Sharing And Self-Reconfiguration Capabilities, Joshua Knospler

Theses and Dissertations

Modular, self‑reconfigurable soft robots promise unprecedented versatility by combining the compliance of soft materials with the adaptability of modular architectures. This thesis presents an integrated system of pneumatic, bending-type soft actuator modules. Modules are compact and fully equipped with tunable magnetic and electromechanical connections for low‑power attachment and detachment and a novel power-air-communication (PAC) connector for seamless sharing of electricity, compressed air, and digital signals. This work examines two representative assemblies: ManusBot, a pinching gripper, and TendrilBot, a versatile linear configuration for various tasks. Their grasping performance, variable stiffness, and radial support capabilities are characterized. A magnetic interlock and an …

Shelf Life And Physicochemical Properties Of Bitter Melon Fruit (Momordicha Crantia, L) Stored At Low Temperature Using Edible Natural Coatings Made From Coconut Oil And Beeswax, Ummi Rohajatien, Budi Wibowotomo, Nico Atmawijaya, Citra Diah Permata, Aly Imron

Bulletin of Culinary Art and Hospitality

Pare fruit is a fruit that has identical characteristics, namely having a bitter taste when consumed. Cultivation of bitter gourds in Indonesia is relatively easy with a favorable tropical climate, but post-harvest handling and storage at room temperature are less effective so that bitter melons rot quickly. So, an edible coating effort was made. This study aims to determine the effect of the ratio of coconut oil and beeswax as an edible coating on the physical quality, weight loss, and antioxidant capacity of bitter melon (Momordicha crantia L.). This experimental study used a completely randomized design (CRD) with two repetitions …

Purchase Motivation At Dimsum Restaurants In Medan. The Perspectives Of Lifestyle And Social Enjoyment, Efin Shu, Calvin Riando

Bulletin of Culinary Art and Hospitality

In Indonesia, dimsum has become a popular food choice due to its affordability and variety, making it a staple in many communities. The purchase motivation for dimsum menus is usually driven by the desire for a taste of tradition and a sense of community, as dimsum is frequently delighted with family and companions. The comfort and reasonableness of dimsum also contribute to its popularity, making it consumed as a lifestyle for numerous consumers. The reason for this research is to investigate the influence of lifestyle on purchase motivations with the moderation of social enjoyment at dimsum restaurants in Medan. The …

Social Determinants Of Dementia Among Older Adults In Samarinda’S Urban Area, Lisa Wahidatul Oktaviani, Ghozali Ghozali, Ferry Fadzlul Rahman, Maya Agustin Ulan Ari

Preventia: The Indonesian Journal of Public Health

Improving the quality of health and welfare of the population has an impact on increasing the number of lives in Indonesia. As a result, the number of elderly people and their proportions is increasing. Dementia is a condition where cognitive decline is so severe that it affects daily activities and social interactions. This condition of cognitive decline usually begins with a decrease in memory or memory abilities. Dementia that occurs among the elderly is caused by several factors, namely lifestyle, cognitive activities, family support, Activity Daily Living (ADL), self-esteem, quality of life, smoking behavior, knowledge, physical activity and sleep quality. …

Adapting A Personalized Normative Feedback Intervention For Graduate Student Drinkers, Faith Shank

Theses and Dissertations

On average, graduate students consume eight drinks per week, meeting criteria for heavy drinking and highlighting the need for a cost-effective intervention. The current study examined the efficacy of personalized normative feedback (PNF) for reducing heavy drinking in graduate students. Study 1 examined the feasibility and acceptability of the intervention content to inform a randomized controlled trial (RCT) of the intervention. Results from qualitative interviews with 13 graduate students who interacted with the intervention content preferred to receive feedback about peers enrolled in the same type of degree program. Study 2 was an RCT using PNF from peers with the …

Visual Tracking And Its Relationship To Dynamic Visual Acuity Among National Youth Foil Fencing Team Athletes, Ishraq Ghalib Oudah, Huda Shihab Jari, Hind Salem Taih, Asal Hassan Sameer

Modern Sport

The significance of this study lies in its focus on the relationship between visual tracking and dynamic visual acuity, both regarded as essential perceptual abilities influencing technical and dynamic performance in foil fencing. This supports coaches and specialists in designing effective training units to improve players' visual and motor efficiency. Given the interactive, fast-paced nature of the sport-which demands instantaneous reactions and high precision in thrusting-there is a need to determine the impact of visual tracking on performance quality. The research problem arose from the authors' observation of the limited attention to visual perceptual aspects in preparation programs, despite their …

The Contribution Rate Of Certain Cognitive And Visual Abilities To The Performance Of Forehand And Backhand Skills In Tennis, Maryam Abduljabbar Khudair, Huda Shihab Jari, Wissem Dhahbi, Fatih Hazar

Modern Sport

The significance of the study lies in identifying a scientific and objective indicator that clarifies the extent to which key cognitive and visual abilities contribute to skill performance in tennis. This enables coaches and instructors to design scientifically based educational and training units that incorporate these abilities according to their level of contribution, thereby positively impacting technical performance. The abundance of stimuli in tennis and the difficulty of controlling performance, due to the sport's ongoing developments, require a high level of cognitive and visual abilities. The researchers aimed to examine the problem of inadequate organization in educational content, where one …

The Instantaneous Push Force Indicator And Its Relationship To Lower Limb Explosive Power And Selected Biomechanical Variables Of The Salto Forward Tucked, Widad Kadhim Majeed, Huda Shihab Jari, Maryam Abdul Jabbar Khudair, Özgür Eken

Modern Sport

The scarcity of studies examining this relationship makes it difficult to provide accurate and scientifically grounded data regarding its significance. This research aims to bridge this academic gap by analyzing the dynamic relationship between these variables. The research problem lies in the observed difficulty athletes face in performing the tucked front somersault on the floor exercise mat. This difficulty may stem from deficits in the explosive muscular power of the legs and insufficient instantaneous push-off force required to achieve the necessary elevation to complete the skill. Additionally, the coach's neglect of the importance of these variables---as well as the biomechanical …

Cyberbullying And Its Relationship To Pessimism And Optimism Among Female Students, Nazik Subhi Mutar, Liqaa Abdulzahra Obaid, Areej Alaa Abbas

Modern Sport

This study aimed to explore the relationship between cyberbullying and levels of pessimism and optimism among female university students, emphasizing the significance of these variables in students' psychological well-being. The research problem was identified in the increasing rates of cyberbullying among female students and its negative impact on optimism and pessimism, alongside the lack of effective counseling programs addressing this issue. The study sample consisted of 30 third-year students from the College of Physical Education and Sports Sciences for Women during the academic year 2023--2024. The participants were deliberately selected through a lottery method. The researchers employed the descriptive survey …

The Effect Of Exercises Using A Broad External Focus Of Attention On Learning The Dribbling Skill In Handball For Children Aged 10–11 Years, Mahdi Mohsen Elias

Modern Sport

The current study aimed to investigate the effect of exercises employing a broad external focus of attention on learning the dribbling skill in handball among fifth-grade primary school students at Al-Mukhtar Primary School for Boys, affiliated with the Directorate of Education in Eastern Baghdad. The research problem lies in the fact that students, while performing basic skills, often fail to attend to external stimuli accompanying the technical execution of the game. As a team sport, handball involves multiple distractors such as opponents, court dimensions, lines, and technical rules, which may negatively impact performance levels, lead to wasted effort and time, …

The Effectiveness Of Mobile Learning Via Smartphone In Facilitating The Acquisition Of Preliminary Swimming Skills, Khitam Musa Ay

Modern Sport

The objective of this study was to investigate the effectiveness of mobile learning via smartphone technology in facilitating the acquisition of preliminary swimming skills. The researcher adopted an experimental methodology, which was deemed appropriate for the nature of the study. The research population consisted of all female students enrolled in the ``Basic Swimming Skills'' course at the Faculty of Sports Sciences during the 2023/2024 academic year, totalling 57 students. A purposive sampling technique was employed to select a sample of 32 students enrolled in the same course. These participants were randomly divided into two equivalent groups: an experimental group (n …

The Effect Of Educational Games On Distance Perception And The Performance Of The Volleyball Serving Skill Among Female Students, Luma Sameer Hammoudi, Marwa Saadi Mahmoud, Ghofran Basheer Hamza, Özgür Eken

Modern Sport

Educational games are among the most effective tools for teaching fundamental skills, particularly in volleyball. The present study addresses the issue of weak performance among second-year female students at the College of Physical Education and Sport Sciences for Women in executing the volleyball serve. This weakness is attributed to the learners' limited perception of the appropriate distance required to toss the ball upward before striking it, as well as their poor understanding of the correct serving distance. Additionally, there is a need to incorporate engaging methods into the educational process. Therefore, the study aimed to design instructional units utilizing educational …

An Analytical Study Of Selected Biomechanical Variables And The Accuracy Of Forecourt And Backcourt Shots In Wheelchair Badminton Players, Zina Abdulkareem Abbas, Fatimah Abed Malih

Modern Sport

The significance of this study lies in analyzing player movement through biokinematic variables using video recording and Kinovea motion analysis software. By investigating selected biomechanical variables, the researchers aimed to improve the accuracy of forecourt and backcourt shots among wheelchair badminton players based on insights derived from this analysis. The findings aim to guide coaches and players by utilizing motion analysis outcomes to enhance training strategies and achieve higher levels of technical performance and athletic accomplishment. The study aimed to describe and analyze the biomechanical variables influencing shot accuracy and identify the relationship between these variables and shot accuracy among …

The Effect Of Boot Camp Training Program On The Development Of Special Strength And Some Biomechanical Indicators Of The Triple Jump In Young Female Athletes, Suaad Abdul-Hussein, Zainab Ali Abdul-Ameer

Modern Sport

The qualitative concept of training experienced athletes is not limited to strength training alone, but extends to general physical conditioning and, ultimately, to special strength training during the specific phases of athletic preparation, depending on the type of sport practiced. Since athletic training should not follow a single, monotonous pattern, the researchers adopted modern Boot camp exercises to develop special strength and biomechanical variables for female triple jump athletes. The study aimed to design Boot camp exercises specifically to enhance special strength and certain biomechanical indicators in young female triple jump athletes, and to identify the impact of these exercises …

The Effect Of Rehabilitation Exercises Combined With Re Exology Massage On Shoulder Joint Range Of Motion And Pain Inwomen With Soft Tissue Rheumatism (Fibromyalgia), Zina Amer Kareem, Suhad Haseeb Abdul Hamid Abd

Modern Sport

This study aims to examine the effect of enhanced Booklet Technique on the learning outcomes of the motor education course. The researchers adopted a quasi-experimental methodology employing a two-group post-test design, with one experimental and one control group. The sample, randomly selected, consisted of 120 first-year students from the Faculty of Physical Education at the University of Sadat City during the academic year 2023/2024, representing 16.74% of the total population. The participants were divided equally into an experimental group (n = 60) and a control group (n = 60). An additional exploratory sample of 60 students (8.37% of the total …

The Effort To Improve Students’ Problem-Solving Ability: Physics E-Modules For High School Students, Hidayatullah Hana Putra, Edi Supriana, Nasikhuddin Nasikhuddin, Annisa U. Yana, Suhailee Sohnui

Jurnal Pendidikan Sains

Physics teachers in Indonesia still face obstacles during learning, such as students who are less active and have difficulty in solving physics problems. The physics learning media used are also still not very interesting and are not based on authentic problem solving. Therefore, this study focuses on the development of PBL-based e-modules on work and energy to improve the physics problem-solving abilities of high school students. This research and development used the ADDIE design and was tested on 90 high school students in High School 1 Sumber Pucung Malang in the 2022/2023 academic year. The questionnaire instrument was used in …

Ethnoscience-Based Science Learning Through Composite Board Making Utilizing Eggshell Waste And Water Hyacinth Fiber (Eichornia Crassipes), Asep Khaidir Arpan, Yulia Sukmawardani, Pina Pitriana, Ade Yeti Nuryantini

Jurnal Pendidikan Sains

The demand for boards continues to increase every year, while overexploitation of wood leads to environmental degradation and forest loss. On the other hand, eggshell and water hyacinth waste continues to grow without optimal utilization. This research aims to make composite boards based on eggshell waste and water hyacinth fibers and analyze the potential of ethnoscience in science learning. This research used a qualitative descriptive method with a literature and documentation study approach. The materials used in this experiment are eggshell waste, water hyacinth fiber, and polyester resin. The composite board was made by mixing water hyacinth fiber and eggshell …

Contextual Approach To Improve Problem Solving Skills In Ipas Subject At Elementary School: A Study Development Of Teaching Materials, Nur Hidayah, Sumarno Sumarno, Joko Siswanto

Jurnal Pendidikan Sains

The objective of this study is to assess the validity, practicality, and efficacy of instructional materials. We refer to this research as research and development, with a focus on the creation of teaching materials. The research design proposed by Borg and Gall consists of six steps: identification of potential and difficulties, data collecting, product design, design validation, design revision, and product trial. The utilized instruments comprise expert and practitioner validity sheets, teacher and student response surveys, and validation sheets for teaching materials and modules, as well as pretest and posttest questions. Experts performed the validity assessment, attaining a score of …

Teaching Materials Containing Kse To Support Character Education In Mathematics Subjects In Elementary Schools, Kunaenah Kunaenah, Rasiman Rasiman, Bagus Ardi Saputro

Jurnal Pendidikan Sains

The purpose of the study was to determine the validity, practicality, and effectiveness of teaching materials containing KSE to support character education in mathematics lesson content. This study employs a development research approach based on Borg and Gall's research design. The subjects of the study were in class V at public elementary school Kaliboyo. The data collection instruments used were validity sheets, response questionnaires, validation sheets, and observation sheets. The findings show that experts carried out the validity test, achieving a value of 93.30% in the very valid category. The practicality test results were derived from various sources: students' questionnaires, …

Development Of Differentiated Teaching Modules With A Scientific Approach To Improve Elementary School Students’ Science Literacy, Supriyanto Supriyanto, Joko Sulianto, Achmad Buchori

Jurnal Pendidikan Sains

The study aim is to determine the validity, practicality, and effectiveness of teaching materials. This type of research involves the development and creation of teaching module products. The research design used is ADDIE (Analysis, Design, Development, Implementation, Evaluation). The instruments used are validity sheets for experts and practitioners, teacher response questionnaires, teaching module validation sheets, and pretest and posttest questions. The findings show that experts conducted the validity test, achieving a score of 92.22 in the very valid category. The practicality test was obtained from the teacher questionnaire, which was stated as practical with an average value of 91.25, and …

Determination Of Urinary Metabolites Of Toluene And Xylenes In Paint Workers And Non-Occupationally Exposed Individuals In Saudi Arabia, Ahmad Alturkstani, Radhouane Chakroun, Bassam Jamoussi, Raghad Alhajaji

Journal of King Abdulaziz University: Meteorology, Environment and Arid Land Agriculture

Aromatic hydrocarbons such as toluene and xylenes are widely used as solvents in industrial processes, particularly in paint production, despite their known toxicity. Occupational exposure to these chemicals poses significant health risks, especially for workers in the manufacturing and application sectors. The International Agency for Research on Cancer (IARC) has reported an increased cancer risk associated with paint fume exposure, prompting regulatory agencies such as the Occupational Safety and Health Administration (OSHA) and the National Institute for Occupational Safety and Health (NIOSH) to establish exposure limits. In Saudi Arabia, a key player in the petroleum and chemical industries, workers face …

The Effect Of Gum Arabic (Acasia Senegal) As A Natural Prebiotic Supplementation For Broiler Chickens, Mohamed A. M. Mousa, Abeer Rabie Khosht, Ibrahim H. Salim, Ahmed. E. Shamseldeen, Ahmed S. Arafa, Maged A. El-Deeb, Hamdy M. El-Komy, Samia M Mobarez

Journal of King Abdulaziz University: Meteorology, Environment and Arid Land Agriculture

Gum Arabic (GA) belongs to the Fabaceae family and contains indigestible soluble fibers (80--85%) that can be fermented by commensal bacteria to enhance performance, immune response, and intestinal integrity. The aim of this study was to determine the effect of different levels of gum arabic (GA) on overall growth performance, serum biochemical indicators, relative weight of visceral and lymphoid organs, intestinal histomorphology, and selected pathogenic bacteria in broiler chickens. A total of 450 day-old Ross chicks were assigned to four groups, containing 0, 2.5, 5.0, 7.5 and 10.0 g gum arabic along with basal feed for 35 days. Results indicated …

Exploring Phytoconstituents Of Neem Leaf Extract And Its Potential Antimicrobial And In Vitro Anticancer Activities, Omer Hosni Mohamed Ibrahim

Journal of King Abdulaziz University: Meteorology, Environment and Arid Land Agriculture

Considering the growing interest in exploring the biologically active chemicals of the neem (Azadirachta indica A. Juss) plant, this current study was designed to explore and characterize the probable phytoconstituents of the methanolic extract of neem leaves using GC-MS analysis. The antibacterial activity of the extract was studied against Agrobacterium tumefaciens, Serratia marcescens, and Acinetobacter johnsonii and its antifungal activity against Rhizoctonia solani, Penicillium italicum, and Fusarium oxysporium. Further, the cytotoxicity was assessed against PC-3, MCF-7, and Caco-2 cancer cell lines, compared with the normal Vero cells, where IC₅₀ and selectivity index for …

Differentiated Teaching Module Using Problem Solving Model: Numerical Ability Of Elementary School Students, Risa Alifatin, Agus Sutono, Ida Dwijayanti

Jurnal Pendidikan Sains

This study aims to develop a differentiated teaching module using the problem-solving model that is valid, practical, and effective to improve students' numerical abilities. This study uses the ADDIE Model research and development approach. The sample in this study was class III of elementary school Tenggulangharjo as an experimental class totaling 22 students and class III of elementary school Karangtengah as a control class totaling 19 students. Data analysis used the t-test and N-Gain test. The study found that (1) the average validity score of the three parts of the Differentiated Teaching Module was 3.74, which is 93.62%, placing it …

The Pursuit Of Fulfillment: A Phenomenological Study Of Street Sweepers In The Philippines, Joseph Seclot, Danilo Fajardo

Social Sciences and Development Review

Street sweepers are one of the most vulnerable groups of workers nowadays due to their working conditions, tenure of employment, health issues, and socio-economic status. Nevertheless, they are the driving force behind the maintenance of solid waste management and the cleanliness of cities. Using the Self-Determination Theory as the framework of this study, this paper aims to explore the sense of fulfillment experienced by street sweepers in Tangub City, Misamis Occidental. Using phenomenological research design, eight (8) street sweepers were interviewed using a semi-structured interview guide questionnaire. The gathered data were transcribed, validated, and analyzed using the Braun and Clarke …

Efektivitas Senam Hamil Dalam Mengurangi Tingkat Stres Dan Kecemasan Ibu Hamil Trimester Iii: Literature Review, Suyati Suwito, Dini Nur Alpiah

Jurnal Fisioterapi Terapan Indonesia

According to WHO (2020), around 10% of pregnant women experience depression and this condition is higher in developing countries, reaching 15.6% during pregnancy and 19.8% after giving birth. Anxiety experienced during pregnancy can have negative effects on both the mother and the fetus. These negative impacts are not only during pregnancy but can also affect the labor process and lactation period. There are various types of sports to reduce anxiety, one of which is gymnastics. This study aims to determine the effectiveness of pregnancy gymnastics in reducing stress and anxiety before childbirth. Literature review research was conducted using PICO search …