Digital Commons Network^™

Static Compressive Behaviour Of A Novel Functionally Graded 3d Re-Entrant Lattice Reinforced High Performance Concrete, Yiwei Xuan, Mingzhong Zhang, Dianwei Gao

International Conference on Durability of Concrete Structures

This study systematically studies the static mechanical properties of high-performance concrete (HPC) reinforced with a 3D re-entrant lattice structure, considering the effect of functionally gradient design. The uniform 3D re-entrant lattice (U) and the corresponding vertically positively and negatively graded lattices (FG1 and FG2) were designed and manufactured with 3D printing. The plain HPC (P-HPC) and HPC reinforced with U (U-HPC), FG1 (G1-HPC) and FG2 (G2-HPC) were fabricated accordingly. Static compressive tests were then conducted to investigate the static compressive behaviour of 3D re-entrant lattice and corresponding lattice reinforced HPC. Results indicate that all 3D re-entrant structures exhibit clear NPR …

Impact Of Sulfate Activation Of Slag Cement On The Performance Of Coarse Recycled Aggregate Concrete, Md Ikramullah Khan, V Vinayaka Ram

International Conference on Durability of Concrete Structures

The global construction industry is facing increasing pressure to adopt sustainable practices, driving the search for alternatives to conventional concrete. This research investigates the development of eco-friendly concrete by replacing virgin coarse aggregates with recycling plant-based coarse recycled aggregates (CRAs) and utilising Portland slag cement (PSC). While PSC-CRA based concrete offers environmental advantages, it typically exhibits lower early-age strength and durability, limiting its practical application. To address these limitations, a systematic experimental study was conducted to evaluate the efficacy of sodium sulfate (Na2SO4) as a chemical activator to the binder. This research comprehensively assessed the impact of the activator on …

Recent Advances In Geopolymer Feedstocks Activation For Sustainable Cement Production, Oluyemi Kehinde, David J. Hughes, Emeka H. Amalu, Dali Bondar

International Conference on Durability of Concrete Structures

The growing environmental and safety issues posed by human activities have underlined the importance of Ordinary Portland Cement production, which is a major contributor to carbon dioxide emissions that impede Net Zero goals. The urgent need to produce cement substitutes with reduced carbon footprints has prompted research on geopolymers formed from industrial mineral wastes. These materials provide promising sustainable development solutions, but the selection of appropriate activation methods remains a significant constraint to their widespread industrial and economical application. A systematic review using the PRISMA protocol included 302 recent and relevant papers, identifying four principal activation strategies and their combinations …

Influence Of Printing Speed And Nozzle Size On Buildability Of 3d Printed Concrete Walls: A Nonlinear Finite Element Study, Auliagitta Kumala Apsari, Asdam Tambusay, Priyo Suprobo, Benny Suryanto

International Conference on Durability of Concrete Structures

The increasing adoption of additive manufacturing in construction necessitates robust simulation frameworks capable of capturing the time-dependent mechanical behaviour of fresh concrete. This study examines the influence of printing speed and nozzle size on the buildability of infilled concrete walls using finite element (FE) simulations. A nonlinear fracture-plastic constitutive model was employed to simulate the time-dependent mechanical behaviour of fresh concrete, with the modelling framework first validated against previously published experimental data to ensure reliability. Subsequently, six wall configurations were analysed, incorporating nozzle diameters of 30 mm and 40 mm, and printing speeds of 20, 30, and 40 mm/s. The …

Steel Fibre Reinforced Self-Compacting Geopolymer Concrete Structural Members, Jubilant Nyasha Chidziya, Chikako Fujiyama

International Conference on Durability of Concrete Structures

Geopolymer concrete (GPC) is an innovative and sustainable alternative to ordinary Portland cement concrete (OPC) for structures in seismic prone areas owing to tough and ductile performance due to strong bond with steel reinforcement. However, the application of GPC in construction projects is low due to limited understanding of the long-term performance of structural members. The objective of this study is to examine the effects of steel fibres on the flexural properties of self-compacting geopolymer concrete (SCGC) and OPC beams. The study involved investigation of the fresh and mechanical properties of concrete. Structural parameters such as toughness, and ductility index …

Surface Morphology, Bond Strength And Failure Behaviour Of Steel Vs Basalt Rebars In Alkali Activated Concrete, Ansu Mary Alex, Sreejith Nanukuttan, Adeline Mccartney, Marios Soutsos, Daniel Mcpolin

International Conference on Durability of Concrete Structures

This microscopic characteristics of basalt bars after exposure to alkaline solutions and pullout performance of steel and basalt rebars embedded in conventional and alkali-activated concrete were studied. The overarching goal is to assess the potential of basalt rebars as an alternative to conventional steel reinforcement in alkali activated concrete elements. To understand their durability in alkaline environments, especially within alkali-activated concrete (AAC), steel and basalt rebars were subjected to an accelerated exposure test in high-pH simulated concrete pore solutions, for 24hrs. This aimed to replicate the aggressive internal environment typically found in AAC and mixes with supplementary cementitious materials. Post-exposure …

Durability Performance Of 3d-Printed Ultra-High Strength Concrete Incorporating Corrosion Inhibitor, Jyotish Kumar Das, M. Mirza Abdillah Pratama, Behzad Nematollahi, Maurizio Guadagnini

International Conference on Durability of Concrete Structures

This paper reports preliminary results on the durability performance of a 3D-printed ultra-high strength concrete (3DP-UHSC). A nitrite-based compound was added at varying dosages (0%, 2%, and 4% by mass of binder) to the developed 3DP-UHSC as a corrosion inhibitor. The effects of the corrosion inhibitor on the workability of fresh mixes and the mechanical properties (compressive and flexural strengths in various directions) of the 3DP-UHSC mixes were studied. Furthermore, the durability performance of the 3DP-UHSC was assessed by conducting porosity, water absorption, and chloride permeability measurements. Mould-cast specimens were also prepared and tested for comparison purposes. The results indicated …

Comparative Assessment Of Battery And Hydrogen Energy Storage In A Grid-Connected Heat-Electricity Integrated Microgrid, Naglaa Elsherbiny, Mohamed Elgamal, Islam Ismael, Akram Elmitwally

Mansoura Engineering Journal

Given the significant challenges of conventional power systems, including high emissions and operational costs, transitioning to microgrids (MGs) is increasingly critical. This paper presents a comprehensive evaluation of three energy management strategies for a grid-connected, heat-electricity integrated MG: (i) a base case without storage, (ii) a battery-based energy storage system (B-BESS), and (iii) a hydrogenbased energy storage system (H-BESS) comprising an electrolyzer (ELC), hydrogen tank (HT), and fuel cell (FC). This study optimizes operational profit and emissions reduction by integrating renewable energy and heat recovery mechanisms. Simulation results show that, compared to the base case, both B-BESS and H-BESS significantly …

Synergistic Effects Of Orifice Geometry And Inclination Angle On The Damping Performance Of Tuned Liquid Column Vibration Absorbers, Mohamed M. Abou Elenin, Younes K. Younes, Mohamed F. Younes

Mansoura Engineering Journal

This study experimentally investigates the dynamic damping performance of passive tuned liquid column vibration absorbers (TLCVAs), focusing on the influence of vertical column inclination angle and orifice disc configuration. Free vibration tests were conducted on a primary system equipped with a TLCVA using a custom-designed test rig. The experimental framework systematically varied inclination angles from to and tested both single-hole and multi-perforated orifice discs, each designed with an equivalent total flow area. A MATLAB-based signal processing framework was employed to analyze time-domain responses, and the logarithmic decrement method was applied to determine the damping ratio of the primary system. The …

Ozark Historical Review, V. 44, 2015

The Ozark Historical Review

No abstract provided.

Incorporating An Innovative Kennel In A Guide Dog Program Based On The Health And Welfare Of Dogs And Humans, Naoko Koda, Miwa Murata, Sakura Mizuta

People and Animals: The International Journal of Research and Practice

During guide dog training, dogs live in kennels and lack house training. The demand for guide dogs that can live easily with their users who are visually impaired is increasing. The Kansai Guide Dogs for the Blind Association (KGBDA) in Japan built an innovative wooden kennel (Mokka Terrace) that is more similar to homes than general kennels and that efficiently controlled dogs and reviewed their operations. This study conducted a literature survey, participant observations, and semi-structured interviews with staff to clarify the background and consensus-building process involved in creating the Mokka Terrace, corresponding efforts, and its strengths, issues, and prospects. …

Editorial, Joseph P. Hupy, Mary M. Fink

Journal of Aviation Technology and Engineering

Editorial for JATE 13.2.

Editorial, Joseph P. Hupy, Mary M. Fink

Journal of Aviation Technology and Engineering

Editorial for JATE 13.1.

J Am Coll Dent 2018 85 1

Journal of the American College of Dentists

The Journal of the American College of Dentists (JACD) publishes scholarly articles, editorials, essays, and reflections addressing the ethical, professional, and social dimensions of dentistry. The Journal serves as a forum for advancing ethics, professionalism, leadership, and excellence within the dental community. By fostering dialogue across disciplines and perspectives, JACD provides readers with insights that encourage ethical, professional practice, lifelong learning, and service to the public, reinforcing dentistry’s commitment to advancing oral healthcare and the common good.

Timing Of Leg Scale Molt In The Black-Capped Vireo, David A. Cimprich

North American Bird Bander

The podotheca is the scaly covering of the bare portions of bird legs. Although it is known that birds periodically replace these scales, the process has only been described in any detail for two species. The purpose of this investigation was to describe the timing of podothecal molt in the Black-capped Vireo (Vireo atricapilla) in relation to both date and the progress of the prebasic feather molt. I captured these birds throughout the time they were present at a site within their breeding range in central Texas. I noted the presence of leg scale molt and scored the molt of …

Boreal Chickadee Notes From Alaska, Michael R. North

North American Bird Bander

I banded 36 Boreal Chickadees (Poecile hudsonicus) and had 27 recaptures for a total of 63 encounters in Anchorage, Alaska, from 1990-1995. Boreal Chickadees mean weight and fat accumulation did not vary between seasons; overall annual mean weight was 11.4 g. During fall and winter measured weight increased during daylight hours, but in summer birds maintained a steady weight throughout the day. Winter weight gain throughout the day was calculated to equal about 11.7% of base body weight. Wing, tail, and tarsal measurement averages and ranges are provided. Body, crown, and remige molt was heaviest in late July and August, …

Recent Literature, Claire Stuyck

North American Bird Bander

No abstract provided.

Front Matter, North American Bird Bander

North American Bird Bander

No abstract provided.

Full Issue, North American Bird Bander

North American Bird Bander

No abstract provided.

Utilitarianism, Dune, And The Moral Problem Of Genetic Engineering, Mathias W. Alling

Quest

Moral Philosophy Essay

Research in progress for PHIL 2306: Introduction to Ethics (Honors)

Faculty Mentor: John Macready, PhD

This article began as a research essay during the Fall 2024 semester for my honors- level course, Introduction to Ethics (PHIL 2306). In this course, students are asked to research a moral issue and offer an argument for whether the issue is morally required, morally permitted, morally permissible, or morally impermissible. Mathias Alling’s philosophically ambitious article “Utilitarianism, Dune, and the Moral Problem of Genetic Engineering” examines the moral permissibility of genetic engineering through the fictional universe of Frank Herbert’s novel Dune …

Billiken As Transcultural Object From American Mascot To Japanese Pop Deity, M.W. Shores

Asia Pacific Perspectives

This article examines Billiken’s transcultural journey from American novelty mascot (1908) to cultural icon, illuminating early twentieth-century Pacific exchange networks and patterns of cultural adaptation. Drawing on American and Japanese archives, it demonstrates how this commercial figure, born from Progressive Era optimism and incorporating Japanese (and Orientalist) design elements, was transformed within Japanese religious and cultural frameworks. The study analyzes Billiken’s metamorphosis from “good luck” commodity to quasi-religious icon, particularly in Osaka’s Shinsekai district, where strategic marketing drove his its late twentieth-century revival after decades of obscurity. While largely forgotten in America and elsewhere, Billiken’s endurance in Osaka challenges narratives …

Call For Editor, Volumes 39-41 (2027-2029), Angela M. Hosek

Basic Communication Course Annual

No abstract provided.

Call For Manuscripts For Volume 38, Angela M. Hosek, Elina Nikolskaya

Basic Communication Course Annual

No abstract provided.

Connection Over Convention: Promoting Collaboration Between Communication Centers And Foundational Communication Courses To Support Student Diversity And Inclusive Practices, Laura Stengrim, Miranda N. Rouse, Elizabeth Reeves O'Connor

Basic Communication Course Annual

Foundational communication courses and communication centers have the opportunity to work in tandem to better help students. Communication centers serve as a hub for students to receive help with their oral communication skills, serving students enrolled in foundational communication courses and across disciplines. As foundational communication course instructors and administrators adjust to changing student demographics and expectations, communication centers can take the lead in promoting inclusive practices by providing resources, professional development, and guidance to instructors, students, and the wider academic community, thus letting go of traditional approaches to promote more innovative practices that stem from collaboration between communication courses …

Using Public Narrative In The Basic Course, Jenifer Goblish, Mark Fokken, Ben Walker

Basic Communication Course Annual

Higher education is rapidly changing and in order to survive instructors need to meet students where they are; this means rethinking and challenging some of the traditional approaches to public speaking in the Basic Communication Course (BCC). This essay outlines how the authors implemented a new assignment in their BCC based on Marshall Ganz’s concept of the Public Narrative. The authors explain their approach and review the benefits and challenges of implementing the Public Narrative into their BCC.

Reimagining The Basic Course: Integrating Asian And African Storytelling Traditions In Public Speaking Pedagogy, Dious Joseph

Basic Communication Course Annual

Public speaking courses often reflect Eurocentric rhetorical traditions, focusing on argumentation, logic, and individual presentation styles. This essay proposes a redesign of public speaking curriculum by incorporating storytelling traditions from Asian and African cultures. These traditions emphasize communal narratives, moral lessons, and audience engagement through relatable stories, offering a richer, more inclusive approach. The essay contrasts the communal and narrative-focused traditions of Asian and African storytelling with Western argumentation and rhetoric. It advocates for integrating these storytelling techniques into public speaking courses to make them more representative of global perspectives, benefiting both international and domestic students. Such integration would prevent …

Is Seeing Believing? Comparing Students’ Mediated Social Learning About Public Speaking Anxiety Using Audio-Only Or Audio-Visual Instruction, Peter B. Gregg

Basic Communication Course Annual

This study examines how mediated instruction affects public speaking anxiety (PSA), self-efficacy, and motivation. Grounded in social cognitive and multimedia learning theories, 137 students viewed or listened to a brief lecture on PSA control. Results showed significant improvements in self-efficacy, reduced PSA, and increased motivation, with no significant differences between audio-only and audio-video formats. These findings suggest that audio-only instruction can be as effective as video-based content, offering an accessible alternative for diverse learners. The study highlights the value of brief, mediated interventions for improving public speaking outcomes in both traditional and online learning environments.

Reimagining "Public Speaking" Projects: A Creative And Inclusive Experience, R. Brandon Anderson, Jennifer A. Butler

Basic Communication Course Annual

This article advocates for an inclusive approach to public speaking instruction by incorporating Universal Design for Learning (UDL). We describe an alternative assignment—“Telling Your Story”—that emphasizes narrative and multimodal expression through a gallery walk format. Designed to support neurodivergent students while benefiting all learners, the assignment reframes traditional speech models and offers a flexible, creative way to enhance public speaking skills. We argue that inclusive design should be viewed as pedagogical best practice, not merely accommodation.

Feeling At Home In The Basic Communication Course: A Qualitative Case Study Of Faculty And Student Perceptions Of A Connected Classroom Climate At One Midwestern University, Cynthia Grobmeier

Basic Communication Course Annual

The concept of a connected classroom climate considers that peer-to-peer interaction, not just instructor-student interaction, contributes to a sense of community in the classroom that can impact student outcomes. This qualitative case study considers both student and instructor perceptions of what contributes to that sense of connection in the classroom at a mid-size, four-year, Hispanic-serving university. Data was collected using semi-structured interviews and member checks with students and instructors who engaged in the first-year basic communication course during the Spring 2022 semester. Four themes emerged in this study: a) the communication classroom is uniquely positioned to create a sense of …

Speech Delivery Versus Speech Content: How Do Non-Expert Audiences Assess Public Speeches?, David G. Levasseur, Elizabeth A. Munz

Basic Communication Course Annual

Public speaking classes should ideally produce students whose speeches are favorably received by an audience. Unfortunately, we actually know very little about how non-expert audiences assess such speeches. Given this information gap, the present study asked untrained public speakers to watch and rate a variety of speeches. Participants were also asked to provide qualitative comments to justify their speech ratings. These qualitative comments were content analyzed, and the content analysis results revealed that participants’ evaluative observations: (1) focused much more on speech delivery than on speech content; (2) referenced specific nonverbal channels (e.g. eye contact) more than combined nonverbal clusters …