Open Access. Powered by Scholars. Published by Universities.®

Digital Commons Network™

Open Access. Powered by Scholars. Published by Universities.®

Discipline
Institution
Keyword
Publication Year
Publication
Publication Type
File Type

Articles 57931 - 57960 of 715413

Full-Text Articles in Entire DC Network

Optimal Load Shedding During Service Restoration In Electrical Secondary Distribution Network Based On Reinforcement Learning, Rukia J. Mwifunyi Apr 2024

Optimal Load Shedding During Service Restoration In Electrical Secondary Distribution Network Based On Reinforcement Learning, Rukia J. Mwifunyi

Tanzania Journal of Engineering and Technology (TJET)

Increased stress in traditional power systems results in blackouts due to voltage instability attributed to a mismatch between available capacity and load demand, especially in distribution networks. Service restoration schemes are designed to return power supply to the affected parts of the networks. The availability of insufficient supply is a complex problem that requires operational experience or an automatic system. The stochastic nature of load demand significantly impacts service restoration as it results in increased restored demand in case a fault occurs during off-peak hours and helps reduce overload if the fault occurs during peak hours. The study adopts an …

Go to article

Assessment Of Risk Factors Related To Body Pain Complaints In Tanzania Construction Industry, Fatma K. Mohamed Apr 2024

Assessment Of Risk Factors Related To Body Pain Complaints In Tanzania Construction Industry, Fatma K. Mohamed

Tanzania Journal of Engineering and Technology (TJET)

The construction industry is associated with risks that can result in musculoskeletal diseases. Although young male workers who are presumed to be healthy dominate the industry in Tanzania, body pain complaints have been widely reported. The aim of this study is to assess the prevalence and causes of body pains in workers. A cross-sectional study involving 396 workers was conducted. A chi square test was used for testing association of independent categorical variables and binary logistic regression analysis was used to determine predictors for body pain complaints. The results show that all study participants complained of at least one form …

Go to article

Study Of The Effects Of Thermal Aging Coupled With Shot-Peening Treatment Of Carbonitrided Din 1.6587 Low Alloy Steel On Retained Austenite And Residual Stresses, Richard J. Katemi Apr 2024

Study Of The Effects Of Thermal Aging Coupled With Shot-Peening Treatment Of Carbonitrided Din 1.6587 Low Alloy Steel On Retained Austenite And Residual Stresses, Richard J. Katemi

Tanzania Journal of Engineering and Technology (TJET)

This work investigated the effects of thermal aging and shot-peening of carbonitrided 1.6587 steel grade on retained austenite and residual stresses. After carbonitriding samples contained maximum of 0.87% carbon, 0.34% nitrogen and 50 mass. -% retained austenite. Thermal aging conditions investigated were -30°C, 90°C and 150°C while the aging period were 14, 96 and 720 hours. After thermal aging, some of the samples were subjected to shot-peening treatment using standard cut wire shots StD – G3 - 0.6 mm VDFI 8001 with intensity in the range of 0.25 to 0.30 mmA and coverage of 1.00 to 1.24 x 98%. It …

Go to article

Finding The Optimal Allocation Of Checkpoints Using The Dynamic Programming Method, Ahmed Aziz Dawood, Wakas S. Khalaf, Leong Wah June Apr 2024

Finding The Optimal Allocation Of Checkpoints Using The Dynamic Programming Method, Ahmed Aziz Dawood, Wakas S. Khalaf, Leong Wah June

Journal of Economics and Administrative Sciences

This research aims to use the competent mathematical method through which it is possible to find the best allocation for the main checkpoints in one of the Iraqi Governorates, which contains 17 administrative units. The Dynamic Programming (DP) method and the method of background calculations were used for this method. The problem of the research lies in the fact that many administrative units in this governorate are subjected to organized attacks by terrorist gangs, which lead to the loss of the lives of many citizens, security forces, as well as private and public properties for them. The security reality of …

Go to article

Life Function Analysis Of A Two-Parameter Exponential Distribution Using Robust Rank Regression, Bekhal Samad Sedeeq Apr 2024

Life Function Analysis Of A Two-Parameter Exponential Distribution Using Robust Rank Regression, Bekhal Samad Sedeeq

Journal of Economics and Administrative Sciences

In this research, a proposed method is presented to estimate the life function of the two-parameter exponential distribution by using the robust rank regression on the dependent variable, which depends on the robust variance-covariance matrix (the FMCD and OGK method) and the robust mean vector through which the rank regression coefficients are estimated using the method of ordinary least squares and employing it in estimating the scale and location parameters of the exponential distribution and thus analyzing the life function on its basis. A comparison was also made between the proposed method and the classical method of rank regression on …

Go to article

Information Model Based On Parameters Of A Combined Soil Preparation Until For Planting, Azmuddin Sadriddinov, Anvar Abdazimov, Faxraddin Mavlanov, Hursand Madrakhim Ugli Rakhimov Apr 2024

Information Model Based On Parameters Of A Combined Soil Preparation Until For Planting, Azmuddin Sadriddinov, Anvar Abdazimov, Faxraddin Mavlanov, Hursand Madrakhim Ugli Rakhimov

Technical science and innovation

The article describes in detail the development of a combined pre-sowing machine as a result of the literature analysis of the scientific research conducted on pre-sowing tillage machines and its use and working process. In addition, the article provides scientifically based information about the factors affecting the leveler-softener and previous work on their improvement. The current state of tillage before planting in Uzbekistan and the size of the tilled fields are studied and tabulated. In order to optimize the parameters of the developed machine and minimize costs, as well as to increase its efficiency, it is devoted to the creation …

Go to article

Estimation Of The Regression Model Using M-Estimation Method And Artificial Neural Networks In The Presence Of Outliers, Hussein Talib Jawad, Rabab Abdul Rida Al-Bakri Apr 2024

Estimation Of The Regression Model Using M-Estimation Method And Artificial Neural Networks In The Presence Of Outliers, Hussein Talib Jawad, Rabab Abdul Rida Al-Bakri

Journal of Economics and Administrative Sciences

This study aimed to predict using regression models in the presence of outliers in the study data. The research delved into outliers, their detection, and model estimation through robust methods, represented by the M estimator and multilayer artificial neural networks. A comparison between these methods was conducted, and they were applied to real data representing a survey of private-sector power generators for 2021. Model evaluation was performed using Mean Squared Error (MSE) and the determination coefficient. The results indicated that the M-estimator with the Huber function outperformed its counterpart with the Tukey function. The best-performing architecture for the artificial neural …

Go to article

Six Sigma Technique To Reduce Waiting Time: A Practical Application In Passport Affairs Directorate, Hadeel Khudair Abbas, Omar Mohammed Naser Alashari Apr 2024

Six Sigma Technique To Reduce Waiting Time: A Practical Application In Passport Affairs Directorate, Hadeel Khudair Abbas, Omar Mohammed Naser Alashari

Journal of Economics and Administrative Sciences

This study investigates the impact of the Six Sigma methodology on improving waiting times in passport directorates. The Six Sigma methodology is crucial for enhancing efficiency and effectiveness in passport directorates, aiming to reduce waiting times and increase customer satisfaction by organizing services more effectively. The research was conducted in the Passport Affairs Department (Mansour Passports) from November 8, 2022, to April 19, 2023, with a sample size of 53 employees and citizens. The problem of this study is to shed light on the role played by the Six Sigma methodology in improving waiting time at the Passport Affairs Department. …

Go to article

The Effect Of Strategic Containment On Organizational Brilliance: An Analytical Research In Ur State Company, Ibtisam Kadhim Zrar, Adel Abdul Al-Abbasi Apr 2024

The Effect Of Strategic Containment On Organizational Brilliance: An Analytical Research In Ur State Company, Ibtisam Kadhim Zrar, Adel Abdul Al-Abbasi

Journal of Economics and Administrative Sciences

The current research aims to demonstrate the relationship and impact between strategic containment and its dimensions (adopting alternatives, facilitating adaptability, synthesizing information, and implementing the chosen strategy) on organizational brilliance and its dimensions (brilliance in leadership, brilliance in service and innovation, and brilliance in Knowledge) in the Ur State Company. The research problem question was whether top management in the organization practices the strategic containment process or not, and does it affect organizational brilliance? The sample of the research consisted of middle management managers (120) participants. To analyze data and information and test hypotheses, the research used many statistical methods …

Go to article

Expectation Parameters In The Poisson Mixture Regression Model For Latent Class By Applying Genetic Algorithm And Maximization Algorithm, Ahmed Khuder Eleas, Emad Hazim Aboudi Apr 2024

Expectation Parameters In The Poisson Mixture Regression Model For Latent Class By Applying Genetic Algorithm And Maximization Algorithm, Ahmed Khuder Eleas, Emad Hazim Aboudi

Journal of Economics and Administrative Sciences

In a Poisson mixture regression model for latent class, observations come from different sub-sources or classes, and the observed data are assumed to be generated by a specific (finite) mixture of unobserved or latent classes. The problem lies in the optimal assignment of observations to their respective classes. This requires sophisticated methods for estimating the parameters in the model. Usually, the model parameters are estimated by the conventional EM algorithm. The research aims to compare the EM algorithm and the genetic algorithm GA. Using simulation, the two algorithms were compared based on the MSE criterion, with different sample sizes (n …

Go to article

The Effect Of Added Market Value On Stock Pricing Efficiency According To The Sharpe Model, Ghadeer Jassim Al-Maliky, Anwar Mustafa Hassan Apr 2024

The Effect Of Added Market Value On Stock Pricing Efficiency According To The Sharpe Model, Ghadeer Jassim Al-Maliky, Anwar Mustafa Hassan

Journal of Economics and Administrative Sciences

The main objective of the research is to study the effect of added market value on the efficiency of stock prices according to the Sharpe model for pricing corporate stocks, according to what emerged from the literature review at the theoretical level, including previous studies, and to deduce its trends associated with the power of interpretation predicted by the research hypotheses in their content related to the impact of value. Added market value to the efficiency of stock prices of the companies studied at the level of the industrial sector in the Iraqi Stock Exchange. A sample was tested using …

Go to article

A Partial Maximum Likelihood Method To Estimate Cox Model For Competing Risk Data With Application, Ibrahim Khalil Hussein, Entsar Arebe Fadam Apr 2024

A Partial Maximum Likelihood Method To Estimate Cox Model For Competing Risk Data With Application, Ibrahim Khalil Hussein, Entsar Arebe Fadam

Journal of Economics and Administrative Sciences

Many Research and clinical studies have addressed the occurrence of failure (death). As a result of other (external) factors, which may introduce additional risks that compete with the event under study. The resulting data refers to the complete data on Competing risks, which are affected by time differences. The exact times of occurrence of these risks are known, meaning the times of failure are observed for all observations with certainty. The impact of these risks on the hazard function is estimated based on the Cox proportional hazards model, which is estimated using the partial maximum likelihood method and numerical algorithms …

Go to article

Results Of Experimental Study Of Solar Collector Efficiency, Shakhnoza Sultanova, Ajargul Mambetsheripova, Jasur Safarov Apr 2024

Results Of Experimental Study Of Solar Collector Efficiency, Shakhnoza Sultanova, Ajargul Mambetsheripova, Jasur Safarov

Chemical Technology, Control and Management

The article considers the influence of ambient temperature on the drying efficiency depending on the incident solar radiation, changes in the average temperature of the absorber plate depending on the absorbed power, as well as the thermal efficiency of the collector at significant values of coolant flow.

Go to article

Features Of Magnetoelastic Converters Of Mechanical Quantities Of Transformer Type, Sulton Amirov, Kamila Jurayeva Apr 2024

Features Of Magnetoelastic Converters Of Mechanical Quantities Of Transformer Type, Sulton Amirov, Kamila Jurayeva

Chemical Technology, Control and Management

The article discusses the features of a magnetoelastic transformer type transducer. In magnetoelastic transformer-type transducers, mutual inductance is assumed as a variable value, which is a function of the value of the applied mechanical force. Hence, the transformation coefficients of such converters are also variable. There are also choke type converters in which a change in the magnetic permeability of the magnetic circuit leads to a change in the total electrical resistance of the choke. For further research, transformer-type converters were selected, which make it possible to widely implement techniques for improving basic characteristics.

Go to article

Dynamic Characteristics Of Magnetoelectric Linear Actuators Of Control Systems, Мakhmudjon Muxamedovich Аbdullayev, Rasul Ernazar Ogli Abdiev Apr 2024

Dynamic Characteristics Of Magnetoelectric Linear Actuators Of Control Systems, Мakhmudjon Muxamedovich Аbdullayev, Rasul Ernazar Ogli Abdiev

Chemical Technology, Control and Management

This paper presents the results of studies carried out on magnetoelectric drives that carry out linear movement, models of drives are built and, on their basis, studies of the main indicators associated with the movement of a linear armature are carried out, such as: speed of movement, acceleration, current values, voltage and traction force of the armature. Also presented are the results of a study of magnetoelectric linear motion drives based on an analysis of graphs of their dynamic characteristics.

Go to article

Modernization Of Water Flow Measurement In Open Irrigation Systems Using The Slope-Area Method, R.M. Aliev, Djalilov Anvar Apr 2024

Modernization Of Water Flow Measurement In Open Irrigation Systems Using The Slope-Area Method, R.M. Aliev, Djalilov Anvar

Chemical Technology, Control and Management

This article describes two methods for determining water flow in open irrigation systems: “speed - area” and “slope - area”. The authors considered the problem of its modernization using the existing method for determining water flow “slope - area” in open irrigation systems. The essence of the issue is the remote transfer of parameters necessary for calculating water flow in open irrigation systems and improving the means of their processing. In scientific studies conducted by the authors, the required hydraulic parameters were studied using the “slope - area” and “speed - area” water flow methods. Based on experimentally obtained data, …

Go to article

Synthesis Algorithm Of Control System Based On Neural Network For The Gas And Oil Process, Jasur Sevinov, Abdishukurov Maqsudovich Shavkat, A.Z. Shodiyorov Apr 2024

Synthesis Algorithm Of Control System Based On Neural Network For The Gas And Oil Process, Jasur Sevinov, Abdishukurov Maqsudovich Shavkat, A.Z. Shodiyorov

Chemical Technology, Control and Management

Automatic control systems in the oil and gas processing are considered. After extraction of natural gas condensate, management of technological parameters plays an important role in its processing. Among the parameter of regulating algorithms, control based on neural network technology was considered. These control systems are created on the basis of algorithms of neural network technology. There are several structures of neural networks according to their structure. Differences in the process of information processing of these branching structures are considered.

Go to article

Algorithms For Structural Synthesis Of Control Systems For Dynamic Objects Under Conditions Of Unmeasurable Disturbances, Husan Zakirovich Igamberdiev, Uktam Farkhodovich Mamirov, Bunyod Mamurjon Ugli Buronov Apr 2024

Algorithms For Structural Synthesis Of Control Systems For Dynamic Objects Under Conditions Of Unmeasurable Disturbances, Husan Zakirovich Igamberdiev, Uktam Farkhodovich Mamirov, Bunyod Mamurjon Ugli Buronov

Chemical Technology, Control and Management

The paper talks about ways to use inverse dynamic models to structure a control system for moving objects when disturbances are not measured. To solve the main problems that arise when implementing the inverse dynamic model method, methods for synthesizing inverse systems with given dynamic characteristics are used. The solution to this problem is obtained based on the theory that dynamic observers are invariant to unmeasured input influences. We broke down the matrix operator on the right into elementary orthogonal rotation matrices and on the left into permutation matrices to get a stable answer to the equation of the current …

Go to article

Geological Structure And Possible Mineralized Zones In Ikungi – Manyoni Area, Tanzania: Delineated From High-Resolution Aeromagnetic Data, Raymond K. Pius, Michael M. Msabi Apr 2024

Geological Structure And Possible Mineralized Zones In Ikungi – Manyoni Area, Tanzania: Delineated From High-Resolution Aeromagnetic Data, Raymond K. Pius, Michael M. Msabi

Tanzania Journal of Science

Understanding geological structures is important in mineral exploration. Delineating subsurface geological structures, structural intersections, and complexities of potential geological settings for the formation of hydrothermal mineral deposits, such as gold requires using magnetic data, particularly, high-resolution aeromagnetic data. To define possible targets for mineral exploration, this study used linear detection and the Centre for Exploration Targeting (CET) techniques on high-resolution aeromagnetic data for structural delineation and interpretation. The study's conclusions indicate that the majority of geological features, such as faults, shears, fault intersections, and fracture systems, trend NE-SW, N-S, and occasionally NW-SE. These structures create potentially large areas that have …

Go to article

Extraction Of Natural Dyes From Delonix Regia Flowers For Cotton Fibres, Lutamyo Nambela, Liberato V Haule Apr 2024

Extraction Of Natural Dyes From Delonix Regia Flowers For Cotton Fibres, Lutamyo Nambela, Liberato V Haule

Tanzania Journal of Science

Textile colouration is among the major industry that pollutes the environment with effluents rich in dye chemicals. Most of the dyes used are synthetics which possess health and environmental impacts. Potentially, the use of bio-based dyes and other chemicals can lessen the environmental challenges of the textile effluents. This study reports on sustainable extraction and dyeing of cotton fabric using extract of Delonix regia flowers. The extraction process was done using acidified water as a solvent and the dyeing process was free from hazardous auxiliary chemicals. To improve the dyeing performance, banana sap was used as an affordable and eco-friendly …

Go to article

Modeling The Transmission Dynamics Of Tuberculosis In Humans, Farida Kisinda, Joshua A. Mwasunda, Mbwiga S. Aloni Apr 2024

Modeling The Transmission Dynamics Of Tuberculosis In Humans, Farida Kisinda, Joshua A. Mwasunda, Mbwiga S. Aloni

Tanzania Journal of Science

Tuberculosis (TB) is a major threat to human health particularly in most of developing countries. In this article, we formulate and analyze a deterministic model for the transmission dynamics of pulmonary and extra-pulmonary tuberculosis. The next generation method is employed to find the basic reproduction number which helps to determine whether TB clears or persists in the human population. Global stability of model equilibria is done through Lyapunov functions whereas the normalized forward sensitivity index method is adopted to determine parameters that drive tuberculosis. Analysis shows that both TB free and endemic equilibria exist. The TB free equilibrium is globally …

Go to article

Prevalence And Predictors Of Cesarean Delivery In A Tertiary Hospital In Taraba State, Nigeria, Olateju Alao Bamigbala, Ayodeji Oluwatobi Ojetunde, Maza Tanko Apr 2024

Prevalence And Predictors Of Cesarean Delivery In A Tertiary Hospital In Taraba State, Nigeria, Olateju Alao Bamigbala, Ayodeji Oluwatobi Ojetunde, Maza Tanko

Tanzania Journal of Science

A cesarean section (CS) is a surgical technique in which a baby is delivered through an abdomen and uterine incision following fetal viability. It is imperative to identify the factors that influence the use of CS to reduce the needless use of this life-saving procedure and increase its availability for those who need it most. Therefore, this study assesses the prevalence and predictors of cesarean delivery in a tertiary hospital in Taraba state, Nigeria. Information of pregnant women who came for delivery to Federal Medical Center, Jalingo, Taraba state Nigeria from August 2021 to August 2023 was collected. Binary Logistic …

Go to article

The Effects Of Algal Blooms On Oxygen Levels In Lakes Babati And Eyasi, Tanzania, Amelia S. Buriyo, Nyatwere D. Mganga, Mary Melchiory Apr 2024

The Effects Of Algal Blooms On Oxygen Levels In Lakes Babati And Eyasi, Tanzania, Amelia S. Buriyo, Nyatwere D. Mganga, Mary Melchiory

Tanzania Journal of Science

Globally aquatic ecosystems are reportedly overwhelmed by algal blooms due to excessive deposition of nutrients which ultimately cause hypoxia, leading to massive fish death. This study aimed at assessing the relationship between algae contents and dissolved oxygen (DO) in Lake Babati which is threatened by anthropogenic activities, whereas Lake Eyasi was used as a control. Algae contents (chlorophyll a), DO and surface water temperature were measured using standard methods. Results revealed that the mean algae content was significantly higher (4.47±0.88 mg/L) in Lake Babati than in Lake Eyasi (1.6±0.45 mg/L) (P < 0.05) and was beyond the standard permissible levels for domestic water supply and healthy ecosystem. Conversely, DO was significantly lower in Lake Babati than in Lake Eyasi (P < 0.05). There was no significant difference in water temperature in the two lakes (P > 0.05). Furthermore, there was an inverse relationship between algae …

Go to article

Angular Distribution Of Bremsstrahlung Spectral Temperature Measured In A Full Dimension Of Ecr Ion Source Using Nai(Ti) Detector, Mwingereza J. Kumwenda Apr 2024

Angular Distribution Of Bremsstrahlung Spectral Temperature Measured In A Full Dimension Of Ecr Ion Source Using Nai(Ti) Detector, Mwingereza J. Kumwenda

Tanzania Journal of Science

Measurement of angular distribution (AD) of the bremsstrahlung spectral temperature from a full dimension of the Electron Cyclotron Resonance Ion Source (ECRIS) along the beam axis is challenging. To overcome some challenges, this paper presents the AD of the bremsstrahlung spectral temperature measured in a full dimension of the ECRIS along the beam axis using data obtained from the Busan Center of Korea Basic Science Institute (KBSI). The bremsstrahlung spectral temperature from 28-GHz ECR Ion source at the KBSI was measured in six, three, and nine azimuthal angles at the injection, centre, and extraction sides of the ECRIS using three …

Go to article

Influence Of Stacking Order On The Structural And Optical Properties Of Cu2znsns4 Absorber Layer Prepared From Dc-Sputtered Oxygenated Precursors, January S Gwaydi, Hezekiah B Sawa, Egidius R Rwenyagila, Nathanael R Komba, Talam E Kibona, Nuru R Mlyuka, Margaret E Samiji, Lwitiko P Mwakyusa Apr 2024

Influence Of Stacking Order On The Structural And Optical Properties Of Cu2znsns4 Absorber Layer Prepared From Dc-Sputtered Oxygenated Precursors, January S Gwaydi, Hezekiah B Sawa, Egidius R Rwenyagila, Nathanael R Komba, Talam E Kibona, Nuru R Mlyuka, Margaret E Samiji, Lwitiko P Mwakyusa

Tanzania Journal of Science

Several studies have attempted to overcome the sudden volume expansion of the precursor during sulfurization by the use of oxygen-containing precursors when growing the CZTS absorber. This work demonstrates the influence of precursor stacking orders on the properties of the CZTS thin film absorber layer from DC-sputtered oxygenated precursors for solar cell applications. CZTS absorber layers were prepared from three types of DC-sputtered stacks, namely, Zn-O/Sn/Cu, Sn/Zn-O/Cu, and Sn/Cu/Zn-O. The precursors were sequentially deposited on a soda lime glass (SLG) using DC-magnetron sputtering and annealed in a sulfur and nitrogen ambient. X-ray diffractometry (XRD) and Raman spectroscopy analyses reveal the …

Go to article

Genetic Characterization Of Water Yam (Dioscorea Alata L.) And Production Constraints Of Yam In Pwani Region And Unguja Island, Tanzania, Gladness E Temu, Veneranda E Mlegi, Nessie D Luambano Apr 2024

Genetic Characterization Of Water Yam (Dioscorea Alata L.) And Production Constraints Of Yam In Pwani Region And Unguja Island, Tanzania, Gladness E Temu, Veneranda E Mlegi, Nessie D Luambano

Tanzania Journal of Science

Yam (Dioscorea spp.) is a tuber crop cultivated in over 30% of all regions in Tanzania, contributing to the carbohydrate needs of many households. The morphological and genetic diversity of water yam (D. alata L.) local cultivars collected from Pwani region and Unguja Island were evaluated using 26 agro-morphological characters and 10 Short Sequence Repeat (SSR) markers. Cluster analysis using morphological characters classified nine water yam local cultivars into two main clusters with three subclusters. Tuber flesh and leaf colour were the main descriptors for clustering. The genetic diversity of 128 water yam genotypes using ten polymorphic SSR markers generated …

Go to article

Modelling The Combined Use Of Long-Lasting Insecticidal Nets And Insecticides Zooprophylaxis Against The Resilience Of Anopheles Arabiensis For Effective Malaria Control, Watson Levens Apr 2024

Modelling The Combined Use Of Long-Lasting Insecticidal Nets And Insecticides Zooprophylaxis Against The Resilience Of Anopheles Arabiensis For Effective Malaria Control, Watson Levens

Tanzania Journal of Science

Malaria is a significant public health concern, especially in tropical regions. It remains endemic in many areas where malaria mosquitoes are prevalent. This study investigates the viability of insecticide zooprophylaxis (IZ) in conjunction with Long Lasting Insecticidal Nets (LLINs) as a strategic approach to combat malaria transmission, particularly in regions dominated by zoophagic vectors. Through the presentation and analysis of a mathematical model that integrates IZ and LLINs for the control of Anopheles arabiensis (An. arabiensis), the research underscores IZ's role in reducing zoophagic vector populations and enhancing malaria control efforts. Notably, the study reveals that achieving comprehensive coverage of …

Go to article

Green And Blue Water Footprints Of Major Crops In The Wami/Ruvu Basin, Tanzania: Implications For Water Scarcity And Sustainability, Benson Hm Lazaro, Martine M. Hagai, Rubhera Ram Mato Apr 2024

Green And Blue Water Footprints Of Major Crops In The Wami/Ruvu Basin, Tanzania: Implications For Water Scarcity And Sustainability, Benson Hm Lazaro, Martine M. Hagai, Rubhera Ram Mato

Tanzania Journal of Science

Accurate estimation of the blue and green water requirements of the various crops cultivated in a water basin is essential for planning specific plant/crop irrigation schedules. In this study, the crop water requirements of the major crops grown in the Wami/Ruvu basin were determined using the FAO-CROPWAT model based on meteorological parameters: monthly maximum and minimum temperature, wind speed, mean relative humidity, sunshine hours, rainfall data, and effective rainfall for 23 hydro-meteorological stations distributed in the study area. The studied crops are rice, maize, beans, tomatoes, and sugarcane. The crop reference evapotranspiration (ETo) and actual evapotranspiration (ETc) for each crop …

Go to article

Dimerization Of The Fluoride Channel Fluc In Membranes, Melanie Ernst Apr 2024

Dimerization Of The Fluoride Channel Fluc In Membranes, Melanie Ernst

Arts & Sciences Graduate Student Theses and Dissertations

Many ion channels are multi-subunit complexes where oligomerization is an obligatory requirement for function as the binding axis forms the charged permeation pathway. However, the mechanisms of assembly within the membrane are largely unknown. Are ion channel complexes thermodynamically stable, and do they participate in dynamic equilibrium oligomerization reactions in membranes? If so, what are the molecular factors governing these reactions? In this thesis, I present several key advances in the study of ion channel oligomerization in membranes through quantitative studies of the dimerization equilibrium reaction of the inverted topology, homodimeric fluoride channel Fluc in lipid bilayers. Chapter 1 provides …

Go to article

Characterizing Brain And Skull Mechanics In The Minipig Using Magnetic Resonance Elastography, Shuaihu Wang Apr 2024

Characterizing Brain And Skull Mechanics In The Minipig Using Magnetic Resonance Elastography, Shuaihu Wang

McKelvey School of Engineering Graduate Student Theses & Dissertations

Computational models and simulation are important tools to investigate the mechanisms underlying traumatic brain injury (TBI); their accuracy depends strongly on accurate model parameters, including the mechanical properties of the brain and its interactions with the skull. However, most existing TBI modeling studies are performed using material properties derived from animal tissue obtained after death. Magnetic resonance elastography (MRE) provides a non-invasive method for estimating the mechanical properties of soft tissue. The overall objective of this thesis is to characterize the biomechanical properties of brain tissue and brain-skull interface in the minipig by using MRE. This was achieved through pursuit …

Go to article

First Prev Next Last