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Design of high SERS sensitive substrates based on branched Ti nanorods
Article reports a rational design of branched titanium (Ti) nanorods formed by glancing angle physical vapor deposition and their applications as substrates for surface-enhanced Raman scattering (SERS). The authors investigation provides a mechanism to fabricate sensitive SERS sensors of Ti nanorods that are known to be thermally and chemically stable and compatible with silicon-based electronics.
Date:
July 8, 2022
Creator:
Abayomi M. Yussuf, Nosirudeen; Li, Jianlin; Jung, Yung Joon & Huang, Hanchen
Object Type:
Article
System:
The UNT Digital Library
Knowledge Management (KM) in Radioactive Waste Management (RWM)
By writing this paper we tried to illustrate the practical difference between KM initiatives in R&D and industry. However, the overlapping of the approaches at some certain stages are visible. The information management has been considered as an essential part of the knowledge management in both of organizations. The capture of the critical knowledge in both organizations remains a main issue even if the selected methods are different. The coaching & mentoring program which are well implemented at the IRE (HZDR), are may be difficult to realize/accomplish at the BGE. However, the pilot coaching program is planned at the BGE, but currently not available due to the “young” founding date in 2017. One of the main concerns of the BGE as an implementer, is the motivation and encouragement of all employees to share and distribute their knowledge and benefit from each other.
Date:
June 2022
Creator:
Abbasova, D.; Hoffer, Gunnar; Anold, T.; Franzen, C. & Wellmann, Peter L.
Object Type:
Text
System:
The UNT Digital Library
Saudi Male Athletes' Experience Using Mental Skills and Attitudes toward Seeking Psychological Assistance in Sport
The primary aim of this research was to assess Saudi Arabian male athletes' attitudes toward seeking sport psychology services and determine their previous experience using mental skills. As a part of the study, an Arabic version of the Sport Psychology Attitudes – Revised form (SPA-R) was developed. Transcultural translation procedures (e.g., back translation) were used to translate the SPA-R into Arabic version. Saudi male athletes (N = 222) ranging from 17 to 25 years of age with various individual and team sport experiences completed the Arabic version of SPA-R survey twice over two-weeks. Exploratory factor analysis indicated that the original theoretical structure of the phenomena existed in the version created for Arabian athletes. Follow-up analyses revealed that Saudi male athletes had high sport psychology consultant confidence and personal openness, moderately high cultural preferences, and low in stigma tolerance. Although the Arabic version of SPA-R may be useful for assessing Saudi male athletes, further research is needed with different Arab populations to verify the factor structure of the observed constructs.
Date:
May 2022
Creator:
Abdulshakur, Alhassan
Object Type:
Thesis or Dissertation
System:
The UNT Digital Library
Gradient-Index Metamaterial Infrared Detector for Enhanced Photo-Response and Image Quality
An enhanced thermal imaging concept made possible through the development of a gradient-indexed metamaterial infrared detector that offers broadband transmission and reflection in THz waves. This thesis proposes a proof of feasibility for a metamaterial infrared detector containing an anti-reflective coating with various geometrically varying periodic metasurfaces, a gradient-indexed dielectric multilayer for near-perfect longpass filtering, and a gradient index of refraction (GRIN) metalens for enhanced focal plane thermal imaging. 2D Rigorous Coupled-Wave Analysis (RCWA) is used for understanding the photonic gratings performance based on material selection and varying geometric structure. Finite Difference Time Domain (FDTD) is used to characterize performance for a diffractive metalens by optimizing the radius and arrangement of cylindrical nanorods to create a desired phase profile that can achieve a desired focal distance for projections on a detector for near- to far-infrared thermal imaging. Through combining a micromachined anti-reflective coating, a near-perfect longpass filter, and metamaterial GRIN metalens, infrared/THz focal plane thermal imaging can obtain faster photo-response and image quality at targeted wavelengths, which allows for scientific advancements in electro-optical devices for the Department of Defense, aerospace, and biochemical detection applications.
Date:
May 2022
Creator:
Adams, Kelsa Derek
Object Type:
Thesis or Dissertation
System:
The UNT Digital Library
"The military unlocked that door for me": Collegiate Experiences of Women Veterans in STEM Majors
Institutions of higher education are a key pathway for supplying the science, technology, engineering, and mathematics (STEM) workforce. Military service members have been identified as STEM-ready and a potential pool for STEM as they transition into civilian careers. Furthermore, women are the fastest growing subpopulation of veterans and may decrease the gender gap within STEM. Higher education researchers are interested in understanding the characteristics and experiences of students who select STEM majors and then persist to graduation. Literature related to women veterans is limited and a qualitative case study approach was utilized to achieve an in-depth understanding of their college experiences. This study examined four women who were successfully navigating STEM majors at one institution and revealed their varying motivations for enrollment and persistence. Three themes generated from this study included: self-awareness, success is personal, and military experience matters. Subsidiary themes included starting over; strategy; salience of age; stage of life; self-advocacy; standards; personal attributes; past experiences; personal responsibility for learning; procuring resources; career path (STEM) reinforced or introduced; creditable and credible; and cultivated soft skills. Veteran critical theory, multiple dimensions of identity and intersectionality were useful frameworks to reference as participants expressed the influence of their identities on their …
Date:
May 2022
Creator:
Adams, Lisa Dawn
Object Type:
Thesis or Dissertation
System:
The UNT Digital Library
Character
Access:
Use of this item is restricted to the UNT Community
Works of art on Wood (Maple plywood), Wood Dye, Recycled cotton yarn, and tufting cloth by artist Atinuke Adeleke as part of a 2023 MFA exhibition entitled "Asepo" in the North Cora Stafford Gallery. 1201 W Mulberry St, Denton, TX from April 19 to April 22, 2023. Asepo is a simulated domestic space that speaks to being a product of the hybridization of cultures, the sense of displacement and the need for belonging that comes with being a hybrid of sorts.
Date:
2022
Creator:
Adeleke, Atinuke
Object Type:
Thesis or Dissertation
System:
The UNT Digital Library
Inner Head
Access:
Use of this item is restricted to the UNT Community
Works of art in Acrylic print, by artist Atinuke Adeleke, as part of a 2023 MFA exhibition entitled "Asepo" in the North Cora Stafford Gallery 1201 W Mulberry St, Denton, TX, from April 19 to April 22, 2023.Asepo is a simulated domestic space that speaks to being a product of the hybridization of cultures, the sense of displacement, and the need for belonging that comes with being a hybrid of sorts.
Date:
2022
Creator:
Adeleke, Atinuke
Object Type:
Thesis or Dissertation
System:
The UNT Digital Library
Pot of Different Skins
Access:
Use of this item is restricted to the UNT Community
Works of art in Wood (MDF), Metal (Pewter), Wood Dye, Recycled cotton yarn, and Backing cloth by artist Atinuke Adeleke, as part of a 2023 MFA exhibition entitled "Asepo" in the North Cora Stafford Gallery 1201 W Mulberry St, Denton, TX, from April 19 to April 22, 2023. Asepo is a simulated domestic space that speaks to being a product of the hybridization of cultures, the sense of displacement, and the need for belonging that comes with being a hybrid of sorts.
Date:
2022
Creator:
Adeleke, Atinuke
Object Type:
Thesis or Dissertation
System:
The UNT Digital Library
Self Portrait
Access:
Use of this item is restricted to the UNT Community
Works of art in Custom printed fabric, Wood (MDF), Clear Acrylic sheet, Acrylic Rods, Pewter, LED lights, by artist Atinuke Adeleke, as part of a 2023 MFA exhibition entitled "Asepo" in the North Cora Stafford Gallery, 1201 W Mulberry St, Denton, TX from April 19 to April 22, 2023. Asepo is a simulated domestic space that speaks to being a product of the hybridization of cultures, the sense of displacement, and the need for belonging that comes with being a hybrid of sorts.
Date:
2022
Creator:
Adeleke, Atinuke
Object Type:
Thesis or Dissertation
System:
The UNT Digital Library
Scalable, top-down optical lithography for electrically contacting monolayer crystallites of vapor grown WSe2 for gas sensing applications
Article discusses how semiconducting two-dimensional transition-metal dichalcogenides (TMDs) have garnered a great deal of interest owing to their large surface-to-volume ratios compared to traditional three-dimensional (3D) semiconductors, and focuses on a specific TMD; tungsten diselenide (WSe₂). In their study, the authors demonstrate the halide-assisted low-pressure chemical vapor deposition (HA-LPCVD) of high crystalline-quality, monolayer WSe₂.
Date:
October 3, 2022
Creator:
Ademaj, Ideal; Mather, Thomas; Jayanand, Kishan & Kaul, Anupama
Object Type:
Article
System:
The UNT Digital Library
Evaluation of pathways to the C-glycosyl isoflavone puerarin in roots of kudzu (Pueraria montana lobata)
Article describes how kudzu produces both O- and C-glycosylated isoflavones, with puerarin (C-glucosyl daidzein) as an important bioactive compound. The authors go on to explain how expression of recombinant UGTs in Escherichia coli and candidate C-glycosyltransferases in Medicago truncatula were used to explore substrate specificities, and gene silencing of UGT and key isoflavone biosynthetic genes in kudzu hairy roots employed to test hypotheses concerning the substrate(s) for C-glycosylation.
Date:
September 2, 2022
Creator:
Adolfo, Laci M.; Burks, David J.; Rao, Xiaolan; Alvarez-Hernandez, Anislay & Dixon, R. A.
Object Type:
Article
System:
The UNT Digital Library
Identification of Pueraria spp. through DNA barcoding and comparative transcriptomics
This article presents research where various kudzu accessions were analyzed through barcoding and comparative transcriptomics, generating tools for identification and molecular pathway analysis.
Date:
January 3, 2022
Creator:
Adolfo, Laci M.; Rao, Xiaolan & Dixon, R. A.
Object Type:
Article
System:
The UNT Digital Library
Framing of COVID-19 in Newspapers: A Perspective from the US-Mexico Border
Article discusses the degree to which the media report a health emergency and how it affects the seriousness with which the people respond to combat the health crisis. After collecting relevant news articles, we used sentiment analysis, rapid automatic keyword extraction (RAKE), and co-occurrence network analysis to examine the main themes and sentiments of COVID-19 news articles.
Date:
November 24, 2022
Creator:
Afrin, Rifat; Harun, Ahasan; Prybutok, Gayle & Prybutok, Victor R.
Object Type:
Article
System:
The UNT Digital Library
Role of Cu addition in enhancing strength-ductility synergy in transforming high entropy alloy
Article investigates the strength-ductility synergy of high-entropy alloys (HEAs).
Date:
March 1, 2022
Creator:
Agrawal, Priyanka; Gupta, Sanya; Shukla, Shivakant; Nene, Saurabh S.; Thapliyal, Saket; Toll, Michael P. et al.
Object Type:
Article
System:
The UNT Digital Library
Processing-Structure-Property Correlation for Additively Manufactured Metastable High Entropy Alloy
In the present study both fusion based - laser powder bed fusion (LPBF), and solid state - additive friction stir deposition (AFSD) additive manufacturing processes were employed for the manufacturing of a metastable high entropy alloy (HEA), Fe40Mn20Co20Cr15Si5 (CS-HEA). A processing window was developed for the LPBF and AFSD processings of CS-HEA. In case of LPBF, formation of solidification related defects such as lack of fusion pores (for energy density ≤ 31.24 J/mm3) and keyhole pores (for energy density ≥ 75 J/mm3) were observed. Variation in processing conditions affected the microstructural evolution of the metastable CS-HEA; correlation between processing conditions and microstructure of the alloy is developed in the current study. The tendency to transform and twin near stress concentration sites provided excellent tensile and fatigue properties of the material despite the presence of defects in the material. Moreover, solid state nature of AFSD process avoids formation of solidification related defects. Defect free builds of CS-HEA using AFSD resulted in higher work hardening in the material. In summary, the multi-processing techniques used for CS-HEA in the present study showcase the capability of the AM process in tailoring the microstructure, i.e., grain size and phase fractions, both of which are extremely …
Date:
August 2022
Creator:
Agrawal, Priyanshi
Object Type:
Thesis or Dissertation
System:
The UNT Digital Library
The Impact of COVID-19 Shocks on Business and GDP of Global Economy
Article examines the relationship between COVID-19 shocks and GDP loss of different countries worldwide based on the seven scenarios of the epidemiological DSGE/CGE model. Their results reveal that the most significant GDP loss is associated with Japan, Germany, and the US, respectively, which are industrialized countries with the most prominent automobile manufacturers.
Date:
November 16, 2022
Creator:
Ahangar, Reza Gharoie & Kim, Myungsup
Object Type:
Article
System:
The UNT Digital Library
Detection of Pancreatic Cancer miRNA with Biocompatible Nitrogen-Doped Graphene Quantum Dots
Article detects the presence of a specific pancreatic cancer-derived miRNA (pre-miR-132) using the fluorescence properties of biocompatible nitrogen-doped graphene quantum dots (NGQDs) synthesized using a bottom-up approach from a single glucosamine precursor. This non-invasive approach allows cancer-specific miRNA detection to facilitate early diagnosis of various forms of cancer.
Date:
August 20, 2022
Creator:
Ajgaonkar, Ryan; Lee, Bong; Valimukhametova, Alina; Nguyen, Steven; Gonzalez-Rodriguez, Roberto; Coffer, Jeffery et al.
Object Type:
Article
System:
The UNT Digital Library
Expanding the Equilibrium Solubility and Dissolution Thermodynamics of Benzoic Acid in Aqueous Alcoholic Mixtures
This article determines the equilibrium solubility of benzoic acid in water and ethanol, as well as in nine {ethanol (1) + water (2)} mixtures from T = (293.15 to 323.15) K. The thermodynamic results presented could be useful in optimizing different physical and chemical processes involving benzoic acid in mixed aqueous-ethanol media.
Date:
August 1, 2022
Creator:
Akay, Sema; Kayan, Berkant; Peña, M. Ángeles; Jouyban, Abolghasem; Martínez, Fleming & Acree, William E. (William Eugene)
Object Type:
Article
System:
The UNT Digital Library
Tales by Moonlight: An Exploratory Analysis of the Effects of a Storytelling Interview Package for Youths and Elders in an Historically Black Community
Storytelling is a practice that is used to pass down important information about culture, environment, and history. From a behavior analytic perspective, the process of storytelling involves contingencies and can be viewed within the framework of the Skinner's analysis of verbal behavior. For each listener, based on their history of learning and experiences, stories enable a unique type of learning about reinforcers, punishers and cultural context. In African American oral tradition, storytelling was and still is important in preserving the identity, safety, and wellbeing of African Americans. The purpose of this project was to inductively explore story telling between youth and elders in an African American community. A training workshop was developed that included an overview of the importance and role of storytelling in the black community and ways for youth to respectfully listen and learn from elders. The participants included two children and one elder. The independent variable was the training package, the dependent measures included the levels of synchronous engagement, the listener behaviors of the youth and the participant voices, that is, the descriptions and reflections of children and elders about the process and outcomes of this project. A multiple probes design across skills with in-vivo generalization check …
Date:
August 2022
Creator:
Akinwale, Oluwabukola Elizabeth
Object Type:
Thesis or Dissertation
System:
The UNT Digital Library
Processing and Shape-Setting of Shape Memory Alloys for Small Satellite Antennas
In this study, four different NiTi-based shape memory alloys (SMAs) compositions were processed, shape-set, and characterized to evaluate their effectiveness as SMA actuation component for satellite antennas. Three of the compositions were commercially available NiTi wires (90°C Flexinol® actuator NiTi wire and Confluent ADB SE508 NiTi wire), NiTi SM495 plates (ATI Specialty Alloys and Components) and the other composition was in house lab-produced NiTiCu plate. Different shape-setting techniques were performed such as pin and plate, fixtures and dies, and finally a sandwich fixture. The two most promising outcomes were the SE NiTi 508 wire and the NiTiCu plate. A SE NiTi 508 wire was first heat-treated at 550 °C for 3 hours and then it was shape-set at 450 °C for 30 min using a Cu tube which was previously deformed to the desired deployment curvature and fixed on a steel rig. The wire was kept inside the Cu tube during the shape-setting process to obtain the desired curvature. After shape-setting, the wire was thermally cycled multiple times. The results showed that the SE NiTi 508 wire was able to retain its deployment shape successfully after each thermal cycle. Furthermore, a NiTiCu plate was sandwiched between two steel sheets which …
Date:
December 2022
Creator:
Al Jabri, Nehal Ahmed Mubarak
Object Type:
Thesis or Dissertation
System:
The UNT Digital Library
Opposing effects of MYZUS PERSICAE-INDUCED LIPASE 1 and jasmonic acid influence the outcome of Arabidopsis thaliana–Fusarium graminearum interaction
Article presents research that shows Arabidopsis MYZUS PERSICAE-INDUCED LIPASE 1 (MPL1), via its influence on limiting jasmonic acid (JA) accumulation, restricts Fusarium graminearum (Fg) infection.
Date:
April 9, 2022
Creator:
Alam, Syeda T.; Sarowar, Sujon; Mondal, Hossain A.; Makandar, Ragiba; Chowdhury, Zulkarnain; Louis, Joe et al.
Object Type:
Article
System:
The UNT Digital Library
The Shadow Effect on Surface Biophysical Variables Derived from Remote Sensing: A Review
Article states that the main objective of this study was to review the recent literature on the shadow effect in remote sensing. An overview of the proposed methods for identifying and removing the shadow effect is presented.
Date:
November 12, 2022
Creator:
Alavipanah, Seyed Kazem; Firozjaei, Mohammad Karimi; Sedighi, Amir; Fathololoumi, Solmaz; Naghadehi, Saeid Zare; Saleh, Samiraalsadat et al.
Object Type:
Article
System:
The UNT Digital Library
Assessing Student Perceptions in Short Research Experiences and Course Research Experiences in Undergraduate Biology Laboratories
This study examined students' perception between short research experiences (SRE) courses and full-semester course research experiences (CRE) using the Persistence in the Sciences (PITS) survey and the interview questionnaire. The study also aimed to correlate the influence of student's demographic as a predictive indicator for Project Ownership Scores (POS) and Quantitative Literacy (QL) score means. The three courses studied at the University of North Texas were Biology for Science Majors Laboratory (BIOL 1760 SRE), Microbiology with Tiny Earth (BIOL 2042 Tiny Earth SRE), and Introductory Biology Research Laboratory I (BIOL 1750 SEA-PHAGES CRE). The mean scores for the PITS categories leaned favorably towards the research component of each laboratory course assessed in this study. The interview questionnaire showed 66% of the students in the SRE courses and 90% of the students in the CRE course preferred the research component of the lab. Paired survey demographic analysis for BIOL 1760 SRE showed significance for the Science Community Values with associate/bachelor's degree. BIOL 1750 SEA-PHAGES CRE showed significance in three of the six categories when comparing means for Project Ownership Emotion, Self-Efficacy, and Science Identity with Gender. Binary logistics was used to build a regression model to predict demographics with approximately 65% …
Date:
August 2022
Creator:
Alberts, Arland Dulcey
Object Type:
Thesis or Dissertation
System:
The UNT Digital Library
Soft Skills Development in Knowledge Management
Soft skills have become increasingly important in the workplace, particularly in knowledge management (KM). Developing a knowledge culture in an organization depends on the soft skills of leaders. KM literature, however, does not often discuss the development and teaching of soft skills that can facilitate the success of knowledge management in organizations. This presentation will present the challenge of teaching and learning soft skills as well as a proposed framework to address those challenges.
Date:
June 2022
Creator:
Albright, Kendra & Krymskaya, Albina
Object Type:
Text
System:
The UNT Digital Library