Science and Technology Studies Commons^™

The Impact Of Custom Mobile Apps On Church Development: A Case Study Of Upper Room Community Church, Joy Tong Dr., Charlie Y. Hu Dr.

Annual Conference on Information and Religion

Abstract:

This research aims to study the impact of custom mobile church apps on church development in the mobile era. Church apps, which provide real-time messaging, social networking, real-time remote service, special interest groups, online giving, events and calendar, archive and many more, have become a trendy approach for churches to keep their members connected and engaged. However, there is still much speculation as to how fruitful using a church app is. Our research will explore three questions: (1) How do and can churches creatively engage their members through apps? (2) What are the most effective and/or commonly used ...

Creativity In Scientific Teams: Unpacking Novelty And Impact, You-Na Lee, John P. Walsh, Jian Wang

Jian Wang

The increasing dominance of team science highlights the importance of understanding the effects of team composition on the creativity of research results. In this paper, we analyze the effect of team size, and field and task variety on creativity. Furthermore, we unpack two facets of creativity in science: novelty and impact. We find that increasing team size has an inverted-U shaped relation with novelty. We also find that the size–novelty relationship is largely due to the relation between size and team field or task variety, consistent with the information processing perspective. On the other hand, team size has a ...

Documentation Of Caddo Ceramic Vessels In The Texas Parks And Wildlife Department Holdings From Goliad State Park, Timothy K. Perttula, Robert Z. Selden Jr.

CRHR Research Reports

On February 6, 2015, three Caddo vessels from an unknown site or sites were documented at the Texas Parks and Wildlife Department’s Archeology Laboratory, where the standard suite of metadata was collected, accompanied by photographs and 3D models of each vessel. While the donor of these vessels remains unknown, stylistic and technological attributes can be used to posit the potential region of origin.

There are three 3D models included in this report of NAGPRA documentation. To manipulate, measure, and otherwise quantify variability in the models, this document must be downloaded, then opened in either Adobe Acrobat or Adobe Reader ...

Introducing Crhr Research Reports, Robert Z. Selden Jr.

CRHR Research Reports

Intruduction to CRHR Research Reports.

Scientific Teams: Self-Assembly, Fluidness, And Interdependence, Jian Wang, Diana Hicks

Jian Wang

Science is increasingly produced in collaborative teams, but collaborative teams in science are self-assembled and fluid. Such characteristics call for a network approach to account for external activities responsible for team product but taking place beyond closed team boundaries in the open network. Given such characteristics of collaborative teams in science, we empirically test the interdependence between collaborative teams in the same network. Specifically, using fixed effects Poisson models and panel data of 1310 American scientists’ life-time publication histories, we demonstrate knowledge spillovers from new collaborators to other teams not involving these new collaborators. Our findings have important implications for ...

Building The New England Collaborative Data Management Curriculum, Donna Kafel, Andrew T. Creamer, Elaine R. Martin

Journal of eScience Librarianship

The need for a curriculum designed for librarians to use for teaching STEM research data management skills to their constituents from diverse STEM disciplines has been widely identified. (Qin and D’Ignazio 2010). From 2012-2014, a collaborative group of New England librarians, led by a project team from the University of Massachusetts Medical School, developed lecture notes, presentation slides, assignments, readings, and case studies for teaching research data management. The New England Collaborative Data Management Curriculum (NECDMC) is unique in its flexibility; providing subject agnostic instructional materials in a modular format for teaching common data management best practices along with ...

A Subspace Projection Approach For Wall Clutter Mitigation In Through-The-Wall Radar Imaging, Fok Hing Chi Tivive, Abdesselam Bouzerdoum, Moeness Amin

Faculty of Engineering and Information Sciences - Papers

One of the main challenges in through-the-wall radar imaging (TWRI) is the strong exterior wall returns, which tend to obscure indoor stationary targets, rendering target detection and classification difficult, if not impossible. In this paper, an effective wall clutter mitigation approach is proposed for TWRI that does not require knowledge of the background scene nor does it rely on accurate modeling and estimation of wall parameters. The proposed approach is based on the relative strength of the exterior wall returns compared to behind-wall targets. It applies singular value decomposition to the data matrix constructed from the space-frequency measurements to identify ...

A Study Of The Behaviour Of Fresh And Coal Fouled Ballast Reinforced By Geogrid Using The Discrete Element Method, Ngoc Trung Ngo, Buddhima Indraratna, Cholachat Rujikiatkamjorn

Faculty of Engineering and Information Sciences - Papers

Geogrids are widely used in ballasted rail tracks for reinforcement and stabilisation. During train operation, ballast becomes contaminated or fouled due to infiltration of fines from the surface, mud pumping from the subgrade, and degradation, which decreases the performance of the geogrids. This paper presents the results of a laboratory and numerical simulation to study the effect that coal fines have on the interface between ballast and geogrid. The stress-strain behaviour of fresh and fouled ballast reinforced by geogrid was investigated via a series of large scale direct shear tests in the laboratory and numerical simulations using the Discrete Element ...

Application Of The Largest Lyapunov Exponent Algorithm For Feature Extraction In Low Speed Slew Bearing Condition Monitoring, Wahyu Caesarendra, Prabuono Buyung Kosasih, A Kiet Tieu, Craig A. S Moodie

Faculty of Engineering and Information Sciences - Papers

This paper presents a new application of the largest Lyapunov exponent (LLE) algorithm for feature extraction method in low speed slew bearing condition monitoring. The LLE algorithm is employed to measure the degree of non-linearity of the vibration signal which is not easily monitored by existing methods. The method is able to detect changes in the condition of the bearing and demonstrates better tracking of the progressive deterioration of the bearing during the 139 measurement days than comparable methods such as the time domain feature methods based on root mean square (RMS), skewness and kurtosis extraction from the raw vibration ...

Micro Sheet Hydroforming Process Of Ultra-Thin Pure Titanium Foil, Hideki Sato, Kenichi Manabe, Dongbin Wei, Zhengyi Jiang, Daiki Kondo

Faculty of Engineering and Information Sciences - Papers

A micro hydromechanical deep drawing is carried out using the pure titanium and the effect of fluid pressure on formability of pure titanium is investigated. The experiments are performed using the two kinds of pure titanium foils (TR270C-H and TR270C-O) and stainless steel foil (SUS304-H) with 50 thickness and the cylindrical and conical punches. As a result, it is found that the peeling off the oxide film of pure titanium can be reduced by applying the fluid pressure because the friction force and contact pressure between the blank and die decreases. However, the formability is lower for pure titanium than ...

Influence Of Loading Conditions During Tensile Testing On Acoustic Emission, Turbadrakh Chuluunbat, Cheng Lu, Andrii Kostryzhev, A Kiet Tieu

Faculty of Engineering and Information Sciences - Papers

The Acoustic Emission (AE) monitoring technique is widely used in mechanical and material research for detection of plastic deformation, fracture initiation and crack growth. However, the influence of AE features (such as signal amplitude, frequency, rise time and duration) on the fracture parameters (such as brittle or ductile mode of propagation and fracture propagation speed) is not completely understood. In this paper, the effect of loading conditions on fracture behavior was studied using AE monitoring during tensile testing of an aluminum alloy specimen. The fracture development was observed using a high speed video camera and was analyzed using the finite ...

Microgrid Capability Diagram: A Tool For Optimal Grid-Tied Operation, Athmi Jayawardena, Lasantha Meegahapola, Duane A. Robinson, Sarath Perera

Faculty of Engineering and Information Sciences - Papers

The microgrid paradigm has gained much interest in the electricity industry due to the increased penetration of distributed resources. A grid-tied microgrid can be viewed as a single generating entity or a load depending on its power export and import at the grid supply point. Similar to conventional generators, grid-tied microgrids have the potential to be able to participate in the energy market in the future to achieve technical, financial and environmental benefits. Effective participation in the energy markets requires numerous planning tools and a comprehensive understanding of the full capability of the microgrid. This paper presents a systematic approach ...

Coupled Discrete Element-Finite Difference Method For Analysing The Load-Deformation Behaviour Of A Single Stone Column In Soft Soil, Buddhima Indraratna, Ngoc Trung Ngo, Cholachat Rujikiatkamjorn, Scott W. Sloan

Faculty of Engineering and Information Sciences - Papers

Experimental studies and numerical modelling of the deformation of soft clay stabilised by stone columns have been conducted over the past few decades. Continuum-based numerical models have provided valuable insight into the prediction of settlement, lateral deformation, and stress and strain-rate dependent behaviour of stone columns at a macroscopic scale, but because they consist of granular material such as crushed rock, gravel, and waste rock aggregates, their behaviour is influenced by inter-particle micromechanics and cannot be modelled properly using these models. In this paper a novel coupled model of the discrete element method (DEM) and finite difference method (FDM) is ...

Oxide Scale Characterization Of Ferritic Stainless Steel And Its Deformation And Friction In Hot Rolling, Xiawei Cheng, Zhengyi Jiang, Dongbin Wei, Liang Hao, Jingwei Zhao, Laizhu Jiang

Faculty of Engineering and Information Sciences - Papers

The oxidation kinetics of ferritic stainless steel 430 was studied in dry and humid air at 1090 °C by Thermo Gravimetric Analysis (TGA). Different atmospheres and heating times were adopted for reheating to obtain different compositions and thickness of the oxide scale. Hot rolling was performed on a 2-high Hille 100 experimental rolling mill at various reductions. Oxide scale thickness and composition were analysed with optical microscopy (OM), scanning electron microscope (SEM) and X-ray diffraction (XRD). The surface profiles were examined by a digital microscope, and the topographic features of the thin oxide scale surface were examined with an atomic ...

A Multi-Objective Design Optimization Strategy For Vertical Ground Heat Exchangers, Su Huang, Zhenjun Ma, Fenghao Wang

Faculty of Engineering and Information Sciences - Papers

A multi-objective design optimization strategy for vertical U-tube ground heat exchangers (GHEs) is presented to minimize the system upfront cost and entropy generation number simultaneously. Five design variables of vertical U-tube GHEs, including borehole number, borehole depth, borehole radius, U-tube outer radius and fluid mass flow rate, are first selected via a global sensitivity analysis method, and then optimized by a genetic algorithm (GA) optimizer implemented in MATLAB. Based on the Pareto frontier obtained from the GA optimization, a decision-making strategy is then used to determine a final solution. Two case studies are presented to validate the effectiveness of the ...

Crystal Plasticity Finite Element Method Modelling Of Indentation Size Effect, Mao Liu, Cheng Lu, A Kiet Tieu

Faculty of Engineering and Information Sciences - Papers

A crystal plasticity finite element method (CPFEM) model has been developed to investigate the indentation size effect (ISE) of aluminium single crystal during nano-indentation. The simulated results have been validated by comparison with experimental observations. The load-hardness curves from simulation are consistent with the experimental results. The mathematic relationship between load and indentation depth has been built to investigate indentation size effect. In addition, the Mises stress, critical resolved shear stress, stress and shear strain rates for a selected element and the lattice curvature have been studied to explain indentation size effect.

A Short Identity-Based Proxy Ring Signature Scheme From Rsa, Maryam Rjabzadeh Asaar, Mahmoud Salmasizadeh, Willy Susilo

Faculty of Engineering and Information Sciences - Papers

Identity-based proxy ring signature concept was introduced by Cheng et al. in 2004. This primitive is useful where the privacy of proxy signers is required. In this paper, the first short provably secure identity-based proxy ring signature scheme from RSA assumption has been proposed. In addition, the security of the proposed scheme tightly reduces to the RSA assumption, and therefore, the proposed scheme has a proper advantage in security reduction compared to the ones from RSA. The proposed scheme not only outperforms the existing schemes in terms of efficiency and practicality, but also does not suffer from the proxy key ...

A Multi-Bead Overlapping Model For Robotic Wire And Arc Additive Manufacturing (Waam), Donghong Ding, Zengxi Pan, Dominic Cuiuri, Huijun Li

Faculty of Engineering and Information Sciences - Papers

Wire and arc additive manufacturing (WAAM) is a promising alternative to traditional subtractive manufacturing for fabricating large aerospace components that feature high buy-to-fly ratio. Since the WAAM process builds up a part with complex geometry through the deposition of weld beads on a layer-by-layer basis, it is important to model the geometry of a single weld bead as well as the multi-bead overlapping process in order to achieve high surface quality and dimensional accuracy of the fabricated parts. This study firstly builds models for a single weld bead through various curve fitting methods. The experimental results show that both parabola ...

High Strength And Ductility Of Ultrathin Laminate Foils Using Accumulative Roll Bonding And Asymmetric Rolling, Hailiang Yu, A Kiet Tieu, Syamsul Hadi, Cheng Lu, Ajit R. Godbole, Charlie Kong

Faculty of Engineering and Information Sciences - Papers

As product miniaturization is becoming widely popular, many microparts are being produced by microforming of sheets/foils, whose strength needs to be able to maintain structural stability of the micro-components. In addition, their strength and ductility of foils generally reduce with a reduction in the thickness due to the size effect. In this paper, we report the fabrication of an aluminum laminate foil using a combined process of accumulative roll bonding (ARB) and asymmetric rolling (AR). It was found that this improves both strength and ductility. TEM results show that the laminate structures produced by ARB develop an inhomogeneous microstructure ...

Urinary Continence Care In Australian Nursing Homes, Ping Yu, Victoria Traynor, David Hailey

Faculty of Engineering and Information Sciences - Papers

Objective Exploring urinary continence (UC) assessment and management practices in Australian nursing homes. Design Mixed method using a questionnaire and interviews. Setting Five nursing homes in Australian metropolitan cities. Subjects Participants 121 staff: mostly female (91%) with a range of roles including personal care assistants (PCAs) (63%), enrolled nurses (ENs) (11%), registered nurses (RNs) (20%) and managers (4%). Main outcomes measure(s) Compliance with and perceptions about UC assessment and management. Results 77% (n=71) of care staff (PCAs, ENs and RNs) were compliant with the UC management protocol of checking for wetness every 2 to 2.5 hours. Toileting ...