Digital Commons Network^™

"Hoch Der Kaiser, Der Kaiser Killed A Cat." An Examination Of Anti-German Sentiment In Print In The British Empire During The Great War: Australia And New Zealand, 1914-1918, Grace A. Bailey

Doctoral Dissertations and Projects

The unprecedented rise in anti-German sentiment across the British Empire during World War I, 1914-1918, was intensified by an “us vs. them” mentality that was reflected daily in the newspapers of the Empire. However, the intense hatred expressed in Antipodean newspapers surpassed that of the rest of the Empire. This dissertation examines the explicit role newspapers in Australia and New Zealand played in inciting Germanophobia among the public and the societal consequences that followed. Ultimately, the hatred led to the internment of those with German heritage, despite their naturalized status. Along the way, however, German Australians changed their last names, …

Not All Ei Dimensions Are Created Equal: Differential Effects Of Perceived Leader Emotional Intelligence On Lmx Quality And Employee Engagement, Michael Frommack

Doctoral Dissertations and Projects

This quantitative study examined the pathways through which employees’ perceptions of their leaders’ emotional intelligence influenced employee engagement, with leader-member exchange (LMX) quality as a mediating mechanism. Using structural equation modeling with data from 368 full-time employees, the study investigated whether the four dimensions of leader emotional intelligence differentially predicted the three dimensions of employee engagement. Results demonstrated that leader EQ strongly predicted LMX quality (β = .80, p < .001, R² = .64), and that leader emotional intelligence and LMX quality significantly predicted employee engagement in bivariate analyses (β = .43, p < .001, R² = .19; β = .47, p < .001, R² = .22, respectively). However, LMX quality completely mediated this relationship. The indirect effect was significant (β = .26, p = .002), while the direct effect was nonsignificant after accounting for LMX (β = .17, p = .108), indicating full mediation. No dimension-specific pathways emerged after controlling for relationship quality. Supplementary analyses revealed that others’ emotion appraisal (OEA) demonstrated almost twice the predictive strength of the other emotional intelligence dimensions for predicting LMX quality (β = .45, p < .001). These findings provide empirical support for Social Exchange Theory and demonstrate that leader emotional intelligence is statistically accounted for by relationship quality mechanisms. Practical implications suggest that organizations should prioritize relationship building competencies in leadership development and selection. Theoretical implications challenge assumptions about dimensional equivalence in emotional intelligence frameworks and establish LMX quality as the complete mediator for leadership influence on employee engagement.

Deuteronomy As A Meta-Hermeneutic To Understand The Land Promise In The Abrahamic Covenant, Alan Leonard Schafer

Doctoral Dissertations and Projects

One component of the Abrahamic Covenant in Gen 12:1–3 is the promise of land. This promise is reiterated to Abraham in Gen 12:7; 13:14–17; 15:7; 15:18–19, and 17:8, then to Isaac in Gen 26:3–5, and finally to Jacob in Gen 28:4 and 28:13–15. Numerous references in the Pentateuch refer to this promise, often using the phrases “the land promised to Abraham, Isaac, and Jacob” and “the land He swore to Abraham, Isaac, and Jacob.”

Although reading the Pentateuch would lead one to believe the Abrahamic land promise refers to an actual piece of real estate with boundaries, many today question …

Rivalry, Risk, And Ruin: The Economic Politics Of Antebellum Florida, Tyler Mudd

Doctoral Dissertations and Projects

This dissertation investigates the interplay of land speculation, legal authority, and political governance in the Florida Territory from 1821 to 1845. Centered around the extensive Forbes and Innerarity land claims carried over from the Spanish period, the litigation and politics are demonstrative of the territorial administration and was profoundly shaped by a concentrated cohort. This faction of legally trained officeholders and investors, figures such as Joseph M. White, Richard K. Call, James, Gadsden, and William P. DuVal, operated as governing nucleus. Their ability and command of statutes, access to federal patronage, and strategic involvement allowed them to use land speculation, …

The Intervention Effects Of Self-Leadership And Motivation On The Second Language Motivation Mechanism In Tanzanian Form 5 Students: A Static-Group Study Using Structural Equation Modeling, Euna Kim Park

Doctoral Dissertations and Projects

The purpose of this quantitative, static-group study was to determine the effect of the intervention among high school newcomers in the English-medium instruction (EMI) context in Tanzania. Tanzanian adolescents have difficulty adapting to the transition to secondary school, as the language of instruction is not their native language. Four high schools in the Southern Highlands of Tanzania participated in the study, with 381 participants in the intervention group and 373 in the control group. The intervention group attended self-leadership training and second-language (L2) motivation workshops, while the control group did not. After the intervention, the two groups completed surveys using …

Navigating Recovery From Toxic Leadership In The Pentecostal Church: A Qualitative Study, Traci Sumner Daniels

Doctoral Dissertations and Projects

The research examined the ways in which Pentecostal Church members experience toxic leadership and their process of healing from such experiences. The research included interviews with thirteen people who experienced spiritual abuse or manipulation. The analysis of data produced four main themes, which included spiritual betrayal and disillusionment, emotional and psychological trauma, rebuilding trust in God and community, and rediscovering authentic servant leadership. The research defines toxic leadership as a form of leadership characterized by maladjusted, malcontent, and malevolent behavior that inflicts severe and enduring harm on individuals, groups, organizations, and communities through destructive behavior and dysfunctional characteristics (Semedo et …

Paul’S Use Of Μυστηριον In His Epistles To New Testament Churches, Daniel G. Hutchins

Doctoral Dissertations and Projects

The world in which the apostle Paul ministered was not one where the religious landscape was blank and there was no competition for worldviews. Indeed, the cultural forces of Judaism, Hellenism, and Roman imperialism produced an environment where numerous religious belief systems were present including Jewish apocalypticism and mysticism, Greco–Roman mystery religions, and imperial worship. Paul found himself preaching a message that had to stand on its own merits in an environment that had been religiously conditioned for centuries. Typical of their parent culture, competing religious systems of Paul’s day took different views of Christianity. For Judaism, Christianity represented a …

A Descriptive Phenomenological Study Of South Texas Non-Denominational Hispanic Ministry Leaders' Spiritual Formation Through Total Worship, Wendy Méndez

Doctoral Dissertations and Projects

Spiritual formation transforms a believer’s relationship with Christ. For ministry leaders, especially volunteers, this process may be enhanced through worship practices. Understanding worship as a holistic lifestyle—beyond just musical or liturgical expression—had a profound influence on participants’ personal and spiritual development in this study. Despite the abundance of literature on worship and spiritual formation, a gap existed in understanding how total worship influenced the spiritual lives of volunteer leaders, particularly in culturally diverse communities. This study addressed the lack of research on the role of total worship in the spiritual formation of volunteer leaders in predominantly Hispanic, English-speaking, non-denominational, charismatic …

Sacred Space, Divine Presence, And Covenant: A Theological Trajectory From Eden To The Indwelling Spirit Across The Pentateuch And The Book Of Joshua, William C. Merry

Doctoral Dissertations and Projects

This dissertation thesis is that sacred space, divine presence, and covenant are a theological triad that gives form to the canonical progression from Eden through the Pentateuch into Joshua and finds its eschatological orientation in the indwelling Spirit. The project as a whole, and its treatment of Genesis–Deuteronomy and Joshua in particular, maintains that the presence of God is never conceived independently of a covenantal relationship and is thereby always concretized, i.e., spatialized in and through the site or locale of the sacred space: Eden, the tabernacle, the land, and the sanctuary at Shiloh. Each of these stages in the …

Expanding The Role Of Law Enforcement Chaplains: Fostering Holistic Wellbeing Through Comprehensive Pastoral Care, Jacqueline Turner

Doctoral Dissertations and Projects

This phenomenological study aimed to understand the interplay between the mental well-being of law enforcement personnel and the potential for pastoral care provided by law enforcement chaplains. Mental well-being is defined as one’s ability to cope with the stresses of life, recognize one’s abilities, learn effectively, work efficiently, and contribute to one’s community (World Health Organization, 2022). The study was guided by Grossoehme et al.’s “Listening Presence” theory, which involves chaplains actively listening to an officer’s story of trauma and fostering a sense of emotional well-being in the officer, thereby shedding light on the interplay between law enforcement officers’ mental …

Hematopoietic Cell Transplantation For Wiskott-Aldrich Syndrome: A Pidtc Report, Jessie L Alexander, Blachy J Dávila Saldaña, Ruta Brazauskas, Sravya Gethika Dammalapati, Linda M Griffith, Ami J Shah, Kristin A Shimano, Hans D Ochs, Jack J Bleesing, Christen L Ebens, Malika Kapadia, Andrea Bauchat, Neena Kapoor, Joseph H Oved, Hesham Eissa, Hannah Lust, Michael D Keller, Hilary Haines, Shanmuganathan Chandrakasan, Julie-An Talano, Ahmad Rayes, Lisa Madden, Evan Shereck, Holly K Miller, Lisa Forbes Satter, Caridad Martinez, Jacob Rozmus, Jeffrey J Bednarski, Lolie C Yu, Deepakbabu Chellapandian, Victor M Aquino, Alan Knutsen, Hey Chong, Ashley Chopek, Alfred P Gillio, Avni Joshi, Hemalatha Rangarajan, Theodore B Moore, Jeffrey R Andolina, Kenneth B Desantes, Mark Vander Lugt, Susan E Prockop, David C Shyr, Kathleen E Sullivan, Suhag Parikh, Katja G Weinacht, Troy R Torgerson, Rebecca Marsh, Christopher C Dvorak, Alice Y Chan, Elie Haddad, Jennifer R Heimall, Michael A Pulsipher, Jennifer W Leiding, Donald B Kohn, Jennifer M Puck, Luigi D Notarangelo, David J Rawlings, Morton J Cowan, Aleksandra Petrovic, Sung-Yun Pai, Lauri M Burroughs

Faculty, Staff and Students Publications

Wiskott-Aldrich syndrome (WAS), an X-linked disorder characterized by immunodeficiency, thrombocytopenia, autoimmunity, and malignancy, can be effectively treated with allogeneic hematopoietic cell transplantation (HCT). Older age at HCT and mismatched donors are known to affect overall survival (OS). However, the influence of specific clinical manifestations or WAS variant class on OS and factors associated with event-free survival (EFS) remain incompletely defined. We analyzed outcomes of 308 patients with WAS who underwent HCT at 37 institutions of the Primary Immune Deficiency Treatment Consortium from 1990 to 2018. With a median follow-up of 5.3 years, the 5-year OS and EFS were 87.2% and …

Incarcerated Geriatric Patients’ Experiences Of Aging And Healthcare, Michelle I Suh, Stephen Chen, Megan Benavides, Sumin Yoon, Nia Lucas, Josiah D Rich, Marc David Robinson, Anita N Chary

Faculty, Staff and Students Publications

Older adults comprise the fastest growing demographic in correctional facilities in the United States. Studies have shown older adults in prison report difficulty accessing healthcare and navigating the prison environment. Little is known about how older adults navigate aging and access healthcare in the jail setting. We sought to explore experiences of older adults incarcerated in a county jail. We conducted semi-structured qualitative interviews with 20 older adults (> 50 years old) who were incarcerated at a local county jail and were referred to the emergency department for acute care needs. Interviews focused on experiences of aging while incarcerated and …

Emapalumab Use In Malignancy-Associated Hemophagocytic Lymphohistiocytosis In The United States: The Real-Hlh Study, Adi Zoref-Lorenz, Carl E Allen, Edward M Behrens, Shanmuganathan Chandrakasan, May Chien, Michelle L Hermiston, Ashley P Hinson, Stefanos Intzes, Michael S Isakoff, Jennifer W Leiding, Abiola Oladapo, Arun Panigrahi, Sachit A Patel, Priti Pednekar, Anish K Ray, Jennifer A Rothman, Blachy Dávila Saldaña, Kelly J Walkovich, Joanna Weinstein, John D Yee, Michael B Jordan, Joanna Weinstein, Ashley P Hinson, Carl E Allen, Olive S Eckstein, Nitya Gulati, Shanmuganathan Chandrakasan, Hilary Haines, Taizo A Nakano, Sachit A Patel, Edward M Behrens, Stefanos Intzes, Allyson Hays, Blachy Dávila Saldaña, Michael B Jordan, Adi Zoref-Lorenz, Rabi Hanna, Michael Isakoff, Anish K Ray, Jennifer A Rothman, Anand Tandra, Robert Cooper, Jennifer W Leiding, May Chien, Susmita Sarangi, Vinod K Gidvani-Diaz, Prakash Satwani, John Carter, Michael Henry, Nicholas Gloude, Sima Bhatt, Deepika Bhatla, Lauren Draper, Arun Panigrahi, Michelle L Hermiston, Renee Modica, Mona Riskalla, Ashley Baker, Brant Ward

Faculty, Staff and Students Publications

Malignancy-associated hemophagocytic lymphohistiocytosis (mHLH), a hyperinflammatory syndrome, has poor prognosis and no standard therapy. Emapalumab, a fully human monoclonal antibody that neutralizes the proinflammatory cytokine interferon gamma, is approved for treating primary hemophagocytic lymphohistiocytosis (pHLH). REAL-HLH, a retrospective chart review conducted across 33 US hospitals, evaluated real-world treatment patterns and outcomes in patients treated with ≥1 dose of emapalumab between 20 November 2018 and 31 October 2021. Data are presented for the subset of patients with mHLH. Overall, 51 of 105 (48.6%) patients were categorized as having secondary HLH, of which 17 of 51 patients had HLH associated with an …

Book Review Of, Invading The American Canon: Translators Of Russian Literary Fiction, 1863-1984, Cassio De Oliveira

World Languages and Literatures Faculty Publications and Presentations

Book Review of, Invading the American Canon: Translators of Russian Literary Fiction, 1863-1984

An Interpretable Machine Learning Model For Predicting Prognosis Of Medulloblastoma Integrating Genetic And Clinical Features, Yu Su, Kaiwen Deng, Xuan Chen, Zhaoyang Feng, Dongyang Wang, Craig Daniels, Hyun Yong Koh, Ricardo Daniel Gonzalez, Hiromichi Suzuki, Tsubasa Miyauchi, Fei Liu, Wei Wang, Jiankang Li, Shuaicheng Li, Rui Chen, Xiaoguang Qiu, Chunde Li, Tao Jiang, Michael D Taylor, Jiao Zhang, Hailong Liu, Yu Tian

Faculty, Staff and Students Publications

Background: Medulloblastoma (MB), the most common malignant pediatric brain tumor, lacks prognostic tools integrating clinical, molecular, and treatment-related characteristics for individualized management.

Methods: We developed machine learning models using multicenter data from 729 Chinese patients (2001-2023), of whom 509 were assigned to the training set and 220 to the testing set, and further validated the models on 201 patients from international MB consortia. To accommodate patients and researchers with varying datatypes, four application scenarios were established, including clinical-molecular-radiotherapy (CMR), clinical-molecular (CM), clinical-radiotherapy (CR), and clinical-only (CO).

Results: We construct four model scenarios and assess their predictive performance in the testing …

Bacterial Fecal Microbiome Composition Associated With Hiv Stage Among Rural And Peri-Urban Adults Living With Hiv In Uganda, Bożena M Morawski, Elise R Morton, Miya Yunus, Claudia Muñoz-Zanzi, Rojelio Mejia, Ran Blekhman, David R Boulware, Sarah M Lofgren

Faculty, Staff and Students Publications

Background

Gut microbiome composition in HIV-infection provides insight into HIV pathogenesis and potentially offers avenues to adjunctive HIV therapies. Although two-thirds of people living with HIV (PLHIV) are in Africa, studies of the gut microbiome PLHIV have focused on non-African populations. Additionally, social, cultural, and environmental factors influence the gut microbiome and differ substantially between African and Western and urban and rural communities. Here, we quantify the relationships between immune status and fecal microbiome composition in 175 rural Ugandan PLHIV.

Methods

In 2013, 175 Ugandan PLHIV contributed a single fecal sample as part of a cohort study of 202 participants. …

Underexplored Maternal Microbiomes: Immune, Metabolic, And Microbial Pathways Shaping Pregnancy Outcomes, Rafael Tomoya Michita, Nicole Jimenez, Melissa M Herbst-Kralovetz, Indira U Mysorekar

Faculty, Staff and Students Publications

Maternal microbial ecosystems play critical roles in shaping reproductive physiology and pregnancy outcomes. During the pre-conception and prenatal periods, these communities modulate maternal physiology by regulating immune tolerance, nutrient metabolism, and susceptibility to pregnancy complications such as preterm birth, hypertensive disorders, and gestational diabetes. While the gut microbiota has been extensively studied, the roles of cervicovaginal, urinary, respiratory, oral, and upper reproductive tract microbiomes remain less clear. In this minireview, we synthesize current knowledge on these underexplored maternal microbiomes, with an emphasis on the cervicovaginal and urinary microbiota and their interactions with the placenta and fetus. We discuss cross-niche microbial …

Comfort Beyond Grief: The Influence Of Brazilian Spiritism On Grief, Maria Luiza D. Reynaud

USF Tampa Graduate Theses and Dissertations

This thesis explores the transformative influence of Brazilian Spiritism on the experience of grief, utilizing a qualitative framework of autoethnography and ethnography. The research begins with the author’s personal account of transitioning from paralyzing existential anxiety and a childhood fear of hell and death to a state of spiritual peace fostered by the study of the Spiritist Doctrine. Historically perceived as an unbearable mystery, Spiritism posits life as a continuous continuum where the immortal soul merely sheds the physical body like a cocoon to return to its true home.

Rooted in the 19th-century codification by Allan Kardec, the doctrine is …

Understanding How Single Mothers In Southwest Nigeria Navigate Mental Health Challenges And Financial Hardships: A Culture-Centered Approach, Zulykha B. Akinjobi

USF Tampa Graduate Theses and Dissertations

Single motherhood is a growing yet stigmatized family structure in Southwest Nigeria, where patriarchal norms, cultural expectations, and structural inequalities converge to produce unique mental health and financial challenges for women. This qualitative study examines how single mothers in Southwest Nigeria navigate mental health challenges and financial hardships through the lens of the Culture-Centered Approach (CCA). Drawing on in-depth semi-structured interviews with 20 single mothers residing in the Yoruba-speaking region of Southwest Nigeria, this study foregrounds locally situated narratives to understand how these women construct and reconstruct meanings of single motherhood within their cultural and structural contexts. Findings reveal that …

Evaluating Hot Mix Asphalt For Different Recycled Asphalt Pavement Contents And Filler Kinds Utilizing Marshall Characteristics And Moisture Damage, Hawraa Jabbar, Miami Hilal, Mohammed Fattah

Engineering and Technology Journal

A significant amount of reclaimed asphalt pavement must be used to address the growing demand for sustainable road-building materials. One of the problems of employing RAP in mixes is that it makes them more rigid. The guideline specifies that when the amount of RAP is greater than 15%, softer-grade asphalt should be used; however, the asphalt used in Baghdad is 40–50 grade, and its high viscosity makes it challenging to mix when adding RAP. Sometimes, softer grades are not readily available and must be made upon request. Therefore, using some waste oil as a rejuvenator was the task. It is …

Production Of Copper Nanoparticles Using Alpha-Amylase Enzyme By An Electrochemical Deposition Method, Neamah Hadi, Mohammad Hafiz, F. Sayyid, Wan Wan Isahak

Engineering and Technology Journal

This study aims to explain the effect of adding the bioactive substance (alpha enzyme) to the electrolyte solution using electrochemical deposition. Through which copper nanoparticles are manufactured, the originality of the research lies in the presence of this addition as a new method in manufacturing nanoparticles in an electrochemical manner, as the alpha-amylase enzyme is extracted from camel saliva, and the product has been diagnosed using (EDX) and scanning electron microscope (FE-SEM) techniques. , Dynamic Light Scattering (DLS) technology, and Zeta potential. The proposed method is an easy, inexpensive, and environmentally friendly method where the alpha enzyme was used as …

Detection Of Arabic Sign Language By Machine Learning Techniques With Pca And Lda, Mosab Hassan, Atheer Sabri, Alaa Ali

Engineering and Technology Journal

People need a communication channel and a way to communicate with a person or group. Deaf people communicate with others through sign language. The remarkable and rapid development in image and video recognition systems has made researchers use this development to solve many problems, including sign language for the deaf, and reduce their suffering in communicating with ordinary people. This work aims to use and apply machine learning technology to build an automatic recognition system for Arabic Sign Language (ArSL). In this work, images of ArSL characters were recognized using four classification techniques (Naïve Bayes (NB), Decision Trees (DTs), and …

The Electrical And Mechanical Aspects Of Aluminum And Copper Resistance Spot Weld Joints, Marwah Fakhri, Ibtihal Mahmood, Ahmed Al-Mukhtar

Engineering and Technology Journal

Resistance spot welding (RSW) is widely used in the automotive industry, particularly for copper-aluminum alloys in electric cars. RSW joint conductivity is crucial for electric vehicles. Welded parts may fracture due to tension, altering conductivity. The study examines resistance spot post-weld joint metallurgy and deformation-induced conductivity changes. The electric resistance of similar and dissimilar RSW joints was examined during tensile tests. Metallurgical tests for RSW joints revealed an increase in grain size from the base metal (BM) to the heat-affected zone (HAZ) and finally the fusion zone (FZ). Satisfactory shear tension strength results were obtained for dissimilar joints (Al-Cu) at …

Investigation And Prediction Of The Impact Of Fdm Process Parameters On Mechanical Properties Of Pla Prints, Mostafa Abdullah, Tahseen Abbas

Engineering and Technology Journal

Complex geometry components can be produced using FDM-based additive manufacturing (AM). In this study, the compressive and tensile strength were investigated, considering variations in layer thickness (0.2, 0.25, and 0.3 mm), density (40%, 60%, and 80%), and infill pattern (tri-hexagon, zig-zag, and gyroid). The experiment was designed using the Taguchi technique and carried out on a commercial FDM 3D printer, involving nine specimens with different processing settings. The compression standard ASTM D695 and tension standard ASTM D638-02a were used for evaluation. The results indicated that infill density significantly impacted compressive and tensile strength, contributing to 65% and 60% of the …

Speech Recognition Algorithm In A Noisy Environment Based On Power Normalized Cepstral Coefficient And Modified Weighted-Knn, Mohammed Safi, Eyad Abbas

Engineering and Technology Journal

Speech recognition is widely used in robot control and automation. Nevertheless, the use of speech recognition in robots is limited due to its susceptibility to background noise. This paper proposes a speech recognition algorithm to control robots in noisy environments. The proposed algorithm is based on Perceptual Linear Predictive Cepstral Coefficients (PNCC), which is a noise-resistant feature extraction technique, and Modified K-Nearest Neighbors (KNN) with Dynamic Time Warping (DTW) as the classifier. A new KNN-DTW classifier is proposed, integrating weighted KNN and DTW. The proposed algorithm results from experiments comparing PNCC and Mel-frequency cepstral coefficients (MFCC) feature extraction techniques with …

The Energy-Efficient Control Solutions Of Smart Street Lighting Systems: A Review, Issues, And Recommendations, Tarek Abedin, Chong Tak Yaw, Siaw Paw Koh, M.A. Hannan, Sieh Kiong Tiong, Kok Hen Chong, Ahmed N Abdalla, Kharudin Ali

Engineering and Technology Journal

The smart street-lighting system (SSLS) is a leading candidate in the smart city. By the time of the last 15 cycles, many meaningful improvements have been executed in the SSLS with the impact of the internet of things technologies and universal networking devices. Conventional smart street lighting systems are restricted to wireless sensor networks, mobile devices, and old lighting control systems. This article presents a comprehensive treatment of network designs, namely communication, control, and wireless sensor-based smart street lighting system by deploying based on their existing system architecture, and network topologies including leading with it a host of privileges. In …

Effects Of Magnetic Field On The Performance Of Solar Distillers: A Review Study, Karrar A. Hammoodi, Hayder Dhahad, Wissam H. ِAlawee, Z.M. Omara, Fadl Essa, A.S. Abdullah, M Amro

Engineering and Technology Journal

Due to the rising demand for treated water, the enhancement of potable water yield technologies, such as traditional solar distillers, is a pressing concern. Solar desalination is one of the easiest techniques for producing fresh water from salt water. It has several benefits, not the least. It utilizes free solar energy. Moreover, it is a simple and inexpensive technique compared to other alternatives. They are, nevertheless, relatively inefficient devices. Many studies have been done to boost the daily output of solar stills by using many active strategies to produce a large amount of evaporation and condensation compared to a basic …

Effects Of Curing Temperature And Chemical Admixture Type On Fresh Properties And Compressive Strength Of Ultra High-Performance Concrete, Khaldon Aswed, Maan Hassan, Hussein Al-Quraishi

Engineering and Technology Journal

The types of post-setting curing and high range water reducing (HRWR) admixture used in Ultra-High-Performance Concrete (UHPC) mixtures play significant roles in determining their rheological and mechanical properties. This study compares the performance of three types of HRWR admixtures commercially available when added to UHPC mixtures under three different curing regimes. Mixtures made with the different superplasticizers were evaluated for their flow, 45mins flow retention, and setting time as fresh mix properties. Compressive strength was also tested for each mixture after 3, 7, and 28 days of curing at the investigated various curing regimes. Sika Viscocrete 180GS produced the highest …

Modifying The Properties Of Open-Graded Friction Course By Adding Cellulose Fiber, Ahmed Muhammed, Zaynab Qasim, Rasha Al-Rubaee

Engineering and Technology Journal

In recent years, Open Graded Friction Course OGFC is becoming more common in some countries. It is applied to improve surface frictional resistance, minimize hydroplaning, reduce water spray, improve night visibility, and lower pavement noise levels. These functions are carried out primarily by removing water from the pavement surface during a period of rain. Also, it has many disadvantages which as poor resistance to permanent deformation, low fatigue strength, high stripping, and moisture susceptibility. The paper aims to investigate the probability of using Cellulose Fiber (CF) as a modifier to improve the properties of OGFC asphalt mixture. In this research, …

Effect Of Different Parameters On Raman Scattering Released From Nb2o5 Nanostructures Prepared Via Pld Technique, Evan Salim, Suhair Shafeeq, Mohammed Abdulrazzaq, Mohammed Wahid

Engineering and Technology Journal

Due to the significance of Nb2O5 as a promising industrial and biomedical material and the importance of Raman analyses to identify nanostructural molecular responsivity for various applications, this study aims to investigate Nb2O5 molecular bands that emerged under the impact of the Raman scattering phenomenon. Besides other advantages, Raman scattering analyses can provide a further investigation of the nanostructural polycrystalline phases supporting the XRD analyses. A pulsed laser was selected as the deposition technique for Nb2O5 thin films prepared with four different parameters. The selection of the pulsed laser deposition (PLD) method was due to the insufficient studies and investigations …