Digital Commons Network^™

Critical Analysis Of Material Consumption And Cost Reduction Techniques For The Apparel Cutting Processes, Ismael Taifa, Ibrahim Twaha, Mboka A Mwakibambo

Tanzania Journal of Science

Revenues generation in the garment industry is synonymous with material consumption. This study thus analysed material consumption and cost reduction techniques in the Tanzanian garment industry. The research employed quantitative (experimentation) and qualitative approaches (document review and observation technique) in the apparel cutting processes. Experimental results of material consumption from ten tests averaged efficiency of 78.67%, the wasted pieces (19.2%), and unnoticed waste (2.03%). Essential considerations to reduce material waste include: digitalising the fabric cutting processes; providing workers training; deploying appropriate practices in the cutting room (e.g. pattern engineering and pattern accuracy); considering the quality of the procured fabric and …

Adaptive Sliding Mode Contouring Control Design Based On Reference Adjustment And Uncertainty Compensation For Feed Drive Systems, Mathew Renny Msukwa, Santos Kihwele

Tanzania Journal of Science

Industrial feed drive systems, particularly, ball-screw and lead-screw feed drives are among the dominating motion components in production and manufacturing industries. They operate around the clock at high speeds for coping with the rising production demands. Adversely, high-speed motions cause mechanical vibrations, high-energy consumption, and insufficient accuracy. Although there are many control strategies in the literature, such as sliding mode and model predictive controls, further research is necessary for precision enhancement and energy saving. This study focused on design of an adaptive sliding mode contouring control based on reference adjustment and uncertainty compensation for feed drive systems. A combined reference …

Modelling The Impact Of Undetected Cases On The Transmission Dynamics Of Covid-19, Herieth Rwezaura

Tanzania Journal of Science

The spread of COVID-19 globally has caused negative impacts to the public, making understanding the dynamics of transmission a necessity. Essential factors such as undetected cases, asymptomatic cases, and several non-pharmaceutical interventions have played significant roles in the spreading mechanism of COVID-19 in the human population. It is imperative to understand the significance of these factors in order to determine whether COVID-19 will be eradicated or will continue to persist in the population. A mathematical model is formulated to investigate the impacts of vaccination and several non-pharmaceutical interventions on the dynamics of a COVID-19 accounting for asymptomatic cases, detected (identified) …

Biodiesel Generation From Palm Kernel Biomass Via An In-Situ Transesterification Approach, Chikaodili D Ikechukwu, Ikhazuagbe H Ifijen, Nyaknno U. Udokpoh

Tanzania Journal of Science

This study investigated an in-situ transesterification of palm kernel biomass at variable reaction times (4 h, 5 h and 6 h) and catalyst loading (2 wt%, 3 wt.% and 5 wt.%). The biodiesel yields were observed to vary with these parameters. GC-MS analysis showed high fatty acid methyl esters (FAMEs) contents for all the prepared biodiesel samples (C-18:1, C-14:0, C-16:0, and C-18:0). 2 wt.% catalyst loading and 4 h reaction time were observed to be the best reaction conditions from the experimented parameters that gave the best biodiesel yield at 300 rpm mixing intensity. The in-situ method recorded a higher …

Application Of Faulkenberry (2018) Bayes Factor To A Balanced Two Way Analysis Of Variance With Random Effects, Onyeike D. Egburonu, Omotayo A. Abidoye

Tanzania Journal of Science

The Analysis of Variance technique estimates variance components by comparing their mean squares to their expected values. Nevertheless, this method could give variance component estimates that are found outside the parameter space, i.e. negative estimates. In a bid to overcome this deficiency, alternate approaches are essential, and likelihood-based approaches have become common over time. Bayesian techniques have also been proposed and Bayes factors developed for examining various models. We applied the Bayes factor proposed by Faulkenberry (2018) to a Balanced Two Way ANOVA under three (3) cases, namely Case 1: the levels of the two factors are fixed; Case 2: …

Mathematical Characterization Of Biological Control Of Cassava Pests Model, Yidiat O. Aderinto, Faith O. Ibiwoye, Michael O. Oke, Folashade M. Jimoh

Tanzania Journal of Science

Pests are major constraints to the effective growth and development of every crop through their damage, and can be controlled effectively by the use of their natural enemies which is referred to as the biological pest control. In this study, the biological control model of cassava pests through optimal control theory was presented in order to minimize the population of the pests and stabilize the natural enemies population so as not to affect the crop negatively. A mathematical model was formulated via the Lotka-Volterra model, and the model was characterized. The optimality system was established, the equilibrium point with its …

Ceding Power In Intra-Household Bargaining In Times Of Economic Anxiety: An Experimental Study In Nepal, Margaret Boittin, Katrina Kosec, Cecilia Hyunjung Mo, Soosun You

All Papers

How do perceptions of one’s relative economic status affect beliefs regarding gender roles? We conducted a 2019 survey experiment with approximately 2,000 adults in Nepal. Employing an established survey treatment called a priming experiment to subtly alter half of respondents’ perceptions of their relative economic well-being, we find that increased feelings of relative deprivation make married women significantly less likely to support gender egalitarian perspectives. Women decrease their support for women making decisions over household expenditures, having equal control over household income, sharing household chores, and women working outside the home. A message randomly read to some women and designed …

Reginald Smith Brindle’S Concept Of Tonal-Atonal Equilibrium In Theory And Practice, Oliver Chandler

Soundboard Scholar

In an attempt to explain how post-tonal harmonic progressions might “make sense,” Reginald Smith Brindle formulated theories of tension flow and tonal-atonal equilibrium in his 1966 textbook, Serial Composition. The former theory compares the number of consonant and/or dissonant intervals between chords, albeit without providing a consistent means of distinguishing between similar sonorities; the latter observes that various musical passages strike a balance between functional and non-functional harmony, albeit without explaining the nature of said balance. While his ideas are evocative, they lack theoretical finesse. Placing them in dialogue with recent developments in post-tonal scholarship helps to unlock their …

The Guitar In Nineteenth-Century America: A Lost Social Tradition, Peter Danner

Soundboard Scholar

This article is one of a series of five by Peter Danner on the history of the guitar in the United States from the late eighteenth to the early twentieth century. Written between 1977 and 1994, these articles first appeared in early issues of the GFA’s magazine Soundboard. They are reprinted here in tribute to Danner’s pioneering contribution to guitar research and to bring them to the attention of a new generation of scholars. The author has generously provided a newly written introduction to the series.

The Flight Of The Maiden: Representations Of Women And The Guitar In Brazilian Culture, Cláudia Araújo Garcia

Soundboard Scholar

This article examines the relationship between women and the guitar in the context of both Brazilian literary discourse and the instrument’s culture and history. To this end, I have sought out texts that illustrate intersections between women and the guitar from the perspective of both female and male authorship. We see that the guitar provides a vehicle for the woman’s voice in all its restlessness, violation, and libertarian desire; but equally, it enables the perpetuation of stereotypes linked to the mirroring of the guitar and the female body. In the absence of literary and historic records of the guitar in …

Characterization Of The Ch Addition Product From Meta- And Ortho-Xylene + Ch Reaction And Direct Experimental Observation Of The Tetrabromine Cluster Br4 Using Synchrotron Photoionization Mass Spectrometry, Rory R. Mcclish

Master's Theses

This thesis is centered on the use of a unique gas-phase spectroscopy technique to characterize products and elucidate reaction mechanisms. Experiments were carried out at the Chemical Dynamics Beamline 9.0.2 of the Advanced Light Source located at the Lawrence Berkeley National Laboratory in Berkeley, CA. Computational work was performed on the scientific supercomputer at USF to supplement experimental findings. Chapter 1 contextualizes the work spurred in response to the deleterious interactions of anthropogenic emissions on Earth’s climate. Chapter 2 describes the theoretical manipulations foundational to the experimental design and interpretation. Chapter 3 delves into the physical details of the experimental …

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 …

Formative Assessment In An Online Class Of Language Learning: Literature Review, Hernik Farisia

Jurnal Pendidikan: Teori, Penelitian, dan Pengembangan

Such published research provided the concept of formative assessment but the current practices of assessment for language learning digital based were weak. Therefore, this study intended to analyse and synthesize the results of relevant literature from any previous research to build a conceptual framework of using formative assessment and feedback in the digital age to promote a greater impact on reading achievement at elementary school. The literature selection was carried out using Publish or Perish (PoP) and screened by Convence.org program to records the eligible’ literature. A total of 8 articles were included in the analyses. The analyses of the …

The Effect Of Personal And Situational Factors On The Intention Of Whistleblowing With Moderated Legal Protection, Daisar Rahman, Nur Hayati

Jurnal Akuntansi dan Keuangan Indonesia

This research is to determine the effectiveness of legal protection in strengthening the relationship between attitude toward behavior, subjective norm, perceived behavioral control, the seriousness of wrongdoing, status of the wrongdoer, and reward with whistleblowing intentions. The population in this research was civil servants who were Regional Inspectors in all regencies in Madura. The sampling technique in this study was purposive sampling consisting of 104 civil servants who had functional positions as auditors, staffing auditors, or supervisors of regional government (P2UPD). Data was collected by distributing questionnaires directly to the respondents. The data analysis technique used in this study was …

Do Socio-Demographic Factors And Sources Of Information Relate To Climate Change Awareness? Evidence From Afrobarometer Round 7 Data, Ayodeji P. Ifegbesan, Razaq O. Azeez, Sesan Mabekoje

Journal of Environmental Science and Sustainable Development

Climate change has been considered the most significant environmental catastrophe which is currently threatening human survival. Like the rest of other countries on the African continent, climate change in Nigeria has debilitating effects on both the people and the community due to vulnerability and poor coping capability of the people. Numerous studies related to the problem of rising temperatures in Africa are now being carried out and documented. However, only a little research evidence is available, particularly from Nigeria, regarding the way socio-demographic factors and sources of information are related to climate change awareness. The Afrobarometer Round 7 data for …

Flood Analysis And Hydraulic Competence Of Drainage Structures Along Addis Ababa Light Rail Transit, Moses Kiwanuka, Seleshi Yilma, Joel Webster Mbujje, John Bosco Niyomukiza

Journal of Environmental Science and Sustainable Development

The occurrence of flooding events and the associated risks are increasing in the urban areas of most developing countries. Flooding in any circumstance causes major stresses on affected area’s economic, social and environmental regimes. Therefore, the current study presents a flood analysis and hydraulic competence of existing drainage structures on some selected roads of Addis Ababa City, after integration with Addis Ababa Light Rail Transit (AALRT) Drainage Systems. The existing side drains and cross drainage structures located within the study area were inspected and assessed to ascertain different aspects relating to their performance. Different watersheds were delineated. Hydrological analysis was …

Housing Condition In Coral Barracks, Nigeria, Sani Inusa Milala, Sani Aududu Maiyaki, Bala Ishiyaku, Sakina Yayajo, Ibrahim Idris, Mustapha Umar Saad

Journal of Environmental Science and Sustainable Development

Housing conditions in the coral barracks become interesting as research subjects to find out that the housing condition covers all-encompassing in both the dwelling’s physical attributes and housing satisfaction. Generally, having satisfactory housing accommodation is among the most prized aspects of human begins’ lives and a key component of people’s material living standards. The aim of this study was to assess the attributes and level of housing conditions in Coral Barracks, Nigeria to explore housing conditions and their attributes and cover only the non-commissioned officers’ quarters. A quantitative method using a questionnaire survey was used and the population size was …

Format Preference And Utilisation Of Library Information Resources By Undergraduates Of Public Universities In A Nigerian State, Bosede Adebimpe Ajiboye, Rahman Olorunleke Arowolo

Library Philosophy and Practice (e-journal)

The existence of an academic environment is incomplete without a functioning library, which forms the fulcrum of all academic institutions in knowledge development and information depository. Irrespective of the format, information must be protected and persevered for posterity. The study used a descriptive design method based on both qualitative and quantitative approaches. Structured Questionnaire was used to obtain data from 210 respondents while for the qualitative data the researcher interviewed the Heads of Automation and Readers’ Services Units of the three universities studied. Data were analysed using descriptive statistics, frequencies, percentage, mean and standard deviation. The formats of information resources …

The Issue Of Women In Science: Exploring The Gender Gap In Egypt's Scientific Research Productivity., Yomna Saleh

Theses and Dissertations

Research productivity and impact are highly valued in the scientific field. It is regarded as a significant determinant of career advancement, financial support, academic recognition, and prominent personal position. Unfortunately, this is an area that has demonstrated a long history of gender disparity. This quantitative study aims to validate and identify gender gaps concerning women’s research productivity to help assess effectiveness of interventions and policies aiming to improve female participation and representation in scientific research. Although, gender gap in scientific publications is a global phenomenon, but this should not mask potential variations at both the national and regional levels. Hence …

Energy Planning Model Design For Forecasting The Final Energy Consumption Using Artificial Neural Networks, Haidy Eissa

Theses and Dissertations

“Energy Trilemma” has recently received an increasing concern among policy makers. The trilemma conceptual framework is based on three main dimensions: environmental sustainability, energy equity, and energy security. Energy security reflects a nation’s capability to meet current and future energy demand. Rational energy planning is thus a fundamental aspect to articulate energy policies. The energy system is huge and complex, accordingly in order to guarantee the availability of energy supply, it is necessary to implement strategies on the consumption side. Energy modeling is a tool that helps policy makers and researchers understand the fluctuations in the energy system. Over the …

Sustainable Wastewater Treatment Technology For Rural Communities, Yousra Ahmed

Theses and Dissertations

Egypt is considered the country with the largest population in the Middle East Region. It is also expected to have the most significant population increase. The main objective of the present research was to develop a sustainable and effective wastewater treatment technology based on locally available materials such as sand and fabric in the treatment process. From the results obtained from the different experimental runs, it can be concluded that the use of fabric-aided sand filters achieves significant removal efficiency, especially in terms of COD and TSS. The results indicated the technical feasibility of utilizing different fabric materials with nylon …

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 …

Itraconazole Nanocomposites Prepared Via Rotary Evaporator Drying Of Nanomilled Suspensions, Alexander Santos Coelho

Theses

The aim of this study is to explore the feasibility of rotary evaporation for drying wetmilled drug suspensions as a novel approach to produce drug nanocomposites that exhibit fast redispersion and immediate drug release. To this end, the physical stability of the nanomilled itraconazole (drug) suspensions, a.k.a., nanosuspensions, during the milling and storage; the drying of the itraconazole nanosuspensions via the rotary evaporator; and the type/loading of various polymers/surfactants (dispersants) on aqueous redispersion and drug release from the nanocomposites were examined. Our results suggest that smaller drug particle size, owing to nanomilling, and smaller nanocomposite particle size, owing to optimized …

It Cannot Happen, Never: A Qualitative Study Exploring Youth Views On Disclosure Of Hiv Diagnosis To Their Sexual Partners In Southern Malawi, Maggie Zgambo, Diana Arabiat, Deborah M. Ireson Dr

Research outputs 2014 to 2021

With the availability of antiretroviral therapy, more children living with HIV live longer than before and grow into young adulthood. This study examined the concerns of youth about disclosure of an HIV diagnosis to their sexual partners and attempted to gain an understanding of their HIV status disclosure experiences, views, and plans. A focused ethnography was undertaken. Using semi-structured interviews, data were collected from 20 youth between the ages of 15 and 24 years who were attending an HIV clinic. The findings highlight that youth generally struggled to disclose their HIV status to their sexual partners. The most frequent reasons …

Long Term Observation Of The Grassland Vegetation Used Intensively Or Extensively And Ecologically, H.-D. Matthes, J. Matthes, W. Jentsch, V. Pastushenko

IGC Proceedings (1977-2023)

The aim of the present paper was to study alterations of the grassland flora from 55 plots following a more extensive management under long term observation within 6 years. Extensification of grassland use leads to an increase of the numbers of plant species by 32%, “Red-list-species” included. The moisture number of the soils slightly increased and the reaction and nitrogen numbers decreased. Results are presented for different vegetation units.

Influence Of Extensive Management On Botanical Composition Of Permanent Meadow Sward, K. Mlynarczyk, E. Korona, E. Marks

IGC Proceedings (1977-2023)

The aim of undertaken investigations was to find the possibilities of grassland management with special respect to the biodiversity and the landscape conservation. Changes in botanical composition of the meadow sward against a background of different mowing utilization were examined on the semi-natural meadows situated on the peat-mursh soil in Masurian Landscape Park (north-east Poland). The areas mown with biennial pause and completely turned off from uses followed gradual simplifying of species composition and increasing of bog species participation. Results show on advisability of passing one harvest each year or with one-year pauses.

Vegetation Changes In Sown Grassland In The Uk After Nine Years Of Extensive Grazing Management, C. A. Marriott, G. T. Barthram

IGC Proceedings (1977-2023)

The effect of extensive grazing management with sheep on vegetation change in sown pastures (initially containing Lolium perenne and Trifolium repens) in the uplands of Scotland was investigated from 1990-1999. One treatment was representative of current more intensive management systems; it was fertilized, and maintained at a sward surface height of 4 cm. Two treatments were unfertilized and were maintained at sward surface heights of 4 cm or 8 cm; the ewe numbers carried on these treatments averaged 74% and 44%, respectively, of those on the fertilized treatment. In all treatments the sheep were Scottish Blackface ewes. Their single …

The Influence Of Rising Atmospheric Co2 On Grassland Ecosystems, J. A. Morgan, P. C. D. Newton, J. Nösberger, C. E. Owensby

IGC Proceedings (1977-2023)

Increasing atmospheric CO₂ concentrations and climatic change will have significant effects on the ecology of grasslands. This paper evaluates results from four CO₂ enrichment studies in contrasting grasslands. A Swiss study investigates the effects of elevated CO₂ (600 μL L^-1 CO₂) on perennial ryegrass (Lolium perenne L.) and white clover (Trifolium repens L), a New Zealand study examines how elevated CO₂ (475 μL L^-1 CO₂) affects a botanically diverse pasture, and studies in the Kansas tallgrass prairie and the Colorado shortgrass steppe investigate the effects of an approximate …

The Effectiveness Of Occupation-Based Virtual Reality Intervention On Upper Extremity Functional Improvement In Post-Stroke Individuals: A Systematic Review, Darcy Bowman, Tiffani Suhm, Ann Marie Brown, Aubrey Barrett, Hannah Reilley

Student Journal of Occupational Therapy

Purpose: Virtual reality (VR)-based therapy is an emerging practice in the clinical setting and still requires research documenting its efficacy. This review analyzed the effectiveness of VR-based therapy on upper extremity (UE) motor recovery in individuals with chronic stroke by analyzing multiple randomized controlled trials.

Methods: Search limits for this review consisted of articles published between January 2010 and January 2020 and available in English. Search keywords were based on language in individual databases (e.g. stroke or cerebrovascular accident, upper extremity, occupational therapy). Articles were limited to include only randomized control trials consisting of adult patients (18+) with …

Securing The Precipitous Heights: U.S. Lawfare As A Means To Confront China At Sea, In Space, And Cyberspace, Garret S. Bowman

Pace International Law Review

No abstract provided.