Digital Commons Network^™

202104-01, 04/10/2021, I-74 W, Mm 165, Dearborn Co., Myles W. Overall, Rahul Suryakant Sakhare, Justin Mukai, Jairaj Desai, Deborah Horton, Darcy M. Bullock

After-Action Reports for Traffic Incident Management (TIM)

No abstract provided.

Flash Archiving The Writing Center: Snapshots From Lebanon And Egypt, Emma Moghabghab, Kathleen Saville, Ira Allen

The Writing Center Journal

No abstract provided.

Optimization Of Permeable Membrane Microchannel Heat Sinks For Additive Manufacturing, S. Ozguc, L. Pan, J.A. Weibel

CTRC Research Publications

The design freedom brought by additive manufacturing (AM) can be leveraged in the design of microchannel heat sinks to improve their cooling performance. The permeable membrane microchannel (PMM) heat sink geometry was inspired by the ability of powder bed AM processes to fabricate partially porous metal parts having small internal flow features on the order of the powder size. The design routes coolant through a parallel array of thin permeable membranes arranged in a single-layer-manifold configuration. The permeable membranes provide effective heat exchange surfaces and the manifold configuration yields a low flow resistance across the PMM heat sink, all incorporated …

Variability In Preschool Class Scores And Children’S School Readiness, Jennifer Finders, Adassa Budrevich, Robert Duncan, David J. Purpura, James Elicker, Sara A. Schmitt

Purdue Center for Early Learning Faculty and Staff Publications

The Classroom Assessment Scoring System (CLASS) is a widely administered measure of classroom quality that assesses teacher-child interactions in the domains of Emotional Support, Classroom Organization, and Instructional Support. We use data from an evaluation of state-funded prekindergarten provided to 684 children from families with low incomes (Mage = 57.56 months, 48% female) to examine the extent to which CLASS scores vary over the course of an observational period within a single day and investigate whether this variability is related to children’s school readiness at the end of the preschool year, holding constant two additional measures of quality. Teacher-child interactions …

Moving Towards Accurate And Early Prediction Of Language Delay With Network Science And Machine Learning Approaches, Arielle Borovsky, Donna Thal, Laurence B. Leonard

Purdue Center for Early Learning Faculty and Staff Publications

Due to wide variability of typical language development, it has been historically difficult to distinguish typical and delayed trajectories of early language growth. Improving our understanding of factors that signal language disorder and delay has the potential to improve the lives of the millions with developmental language disorder (DLD). We develop predictive models of low language (LL) outcomes by analyzing parental report measures of early language skill using machine learning and network science approaches. We harmonized two longitudinal datasets including demographic and standardized measures of early language skills (the MacArthur-Bates Communicative Developmental Inventories; MBCDI) as well as a later measure …

A Multi-Study Examination Of The Role Of Repeated Spaced Retrieval In The Word Learning Of Children With Developmental Language Disorder, Laurence B. Leonard, Sharon L. Christ, Patricia Deevy, Jeffrey D. Karpicke, Christine Weber, Eileen Haebig, Justin Kueser, Sofía Souto, Windi Krok

Purdue Center for Early Learning Faculty and Staff Publications

Background

Many children with developmental language disorders (DLD) have well-documented weaknesses in vocabulary. In recent years, investigators have explored the nature of these weaknesses through the use of novel word learning paradigms. These studies have begun to uncover specific areas of difficulty and have provided hints about possible intervention strategies that might help these children learn words more accurately and efficiently. Among the studies of this type are those that incorporate repeated spaced retrieval activities in the learning procedures.

Methods

In this study, we examined the data from four of these studies that employed the same types of participants (4- …

Simulating The Acquisition Of Verb Inflection In Typically Developing Children And Children With Developmental Language Disorder In English And Spanish, Daniel Freudenthal, Michael Ramscar, Laurence B. Leonard, Julian M. Pine

Purdue Center for Early Learning Faculty and Staff Publications

Children with developmental language disorder (DLD) have significant deficits in language ability that cannot be attributed to neurological damage, hearing impairment, or intellectual disability. The symptoms displayed by children with DLD differ across languages. In English, DLD is often marked by severe difficulties acquiring verb inflection. Such difficulties are less apparent in languages with rich verb morphology like Spanish and Italian. Here we show how these differential profiles can be understood in terms of an interaction between properties of the input language, and the child's ability to learn predictive relations between linguistic elements that are separated within a sentence. We …

Elementary Preservice Teachers’ Trajectories For Appropriating Engineering Design–Based Science Teaching, Brenda Capobianco, Jeffrey Radloff

Purdue Center for Early Learning Faculty and Staff Publications

Learning to teach science using engineering design is a complex endeavor for elementary preservice teachers (PSTs). This entails helping PSTs understand students as sense makers and recognizing ways to notice, respond, and leverage their students’ ideas throughout the design process. In this study, we follow a cohort of elementary PSTs through a 16-week method course including a related field experience in a local STEM intermediate school (grades 5–6) to better understand how they organize, plan for, and attempt to integrate engineering design–based science teaching. Data were gathered through interviews, lesson plans, reflective narratives, and classroom observations. Data were analyzed using …

Facilitating Preservice Elementary Science Teachers’ Shift From Learner To Teacher Of Engineering Design-Based Science Teaching, Brenda Capobianco, Jeffrey Radloff, Jenna Clingerman

Purdue Center for Early Learning Faculty and Staff Publications

The role of engineering in science and mathematics education continues to emerge as a contributing factor to improving STEM education. Efforts across different countries include the integration of engineering in K-12 curriculum, after school programs, and inservice teacher professional development. Only recently have science teacher educators begun to introduce engineering in science teacher preparation programs. By incorporating novel curriculum and design-related experiences, we can begin to explore how preservice teachers not only learn about engineering, but more importantly, learn how to teach science using engineering design. In this study, we explore different ways 45 elementary preservice science teachers characterize and …

Examining The Factor Structure And Validity Of The Triarchic Model Of Psychopathy Across Measures, Katherine L. Collison, Joshua D. Miller, Donald R. Lynam

Department of Psychological Sciences Faculty Publications

The triarchic model of psychopathy proposes 3 distinct trait domains underlying psychopathy: boldness, meanness, and disinhibition. The original (and most widely used) measure developed from this model is the Triarchic Psychopathy Measure (TriPM), which yields a total psychopathy score as well as scores on each of the 3 domains. Recently, researchers have derived several alternative measures from other inventories to assess these 3 domains; however, the purported underlying 3-factor structure of the alternative scales has been relatively untested. In the present study, 431 participants completed the TriPM and its alternative measures via Amazon Mechanical Turk, and items within the scales …

Colored Sweet Bell And Tapered Pepper Cultivar Evaluation For High Tunnel Production In West-Central Indiana, 2020, Petrus Langenhoven

Midwest Vegetable Trial Reports

Sweet colored pepper is a very popular crop among small and medium-sized farm enterprises in Indiana. Especially farms selling to specialty markets or doing direct-to-consumer marketing. Growers always wonder which variety will work best for them. They might ask will this variety perform in my high tunnel. This paper report on a sweet pepper variety trial that was conducted during 2020 at the Purdue Student Farm, West Lafayette IN. Overall, most varieties performed well. Bell pepper variety Flavorburst was again a top contender. Midas (yellow bell pepper), however, was the best performing bell pepper variety. Tapered pepper varieties Carmen (red) …

Working With Multilingual Student Writers, Purdue Writing Lab

Purdue Writing Lab/Purdue OWL Creative Materials

Reading and assessing the writing of multilingual students can be a unique challenge for college faculty. This guide offers strategies for how to read, assess, and provide feedback on the work of multilingual student writers, and it contextualizes these strategies in current Second Language Studies research. Sections of the guide address contexts of multilingual writing, common concerns about multilingual writers, and methods for supporting writers and for addressing errors.

Working With Graduate Student Writers, Purdue Writing Lab

Purdue Writing Lab/Purdue OWL Creative Materials

The purpose of this guide is to aid faculty across the university in supporting graduate students as writers. The guide offers information on the context of graduate student writing and on the development of graduate students as scholarly writers, addresses some common concerns about graduate student writing, and shares methods and activities for supporting writing development at the graduate level.

Study Of High-Performance Engineering Polymers Applied In Reciprocating Hermetic Refrigeration Compressors, Roger Nelson, Patrick Kunc, Laurent Hazard, Celso Kenzo Takemori, Diego Willian Da Silva, Edmar Baars, Gustavo Rafael Bernardes, Igor Leanardo Lessack, Luis Miguel Valdes Lopez

International Compressor Engineering Conference

Manufacturers of hermetic refrigeration compressors for domestic and commercial applications have been increasing the energy efficiency of their products systematically over the last decades through the continuous efforts of in-house research groups, universities and suppliers. This joint effort encompasses the technical fields of design, materials, processes, manufacturing, and simulation techniques, to achieve a multidisciplinary approach to compressor optimization as applied to refrigeration systems. Gains such as increased efficiency of the electric motor, reduction of bearing friction power loss, minimizing back flow on valves have already been addressed and the continuous search for new approaches have been proposed. This work presents …

Mgmt 110: Standards Module In-Class Lesson Plan, Margaret Phillips, Heather A. Howard, Annette Bochenek, Zoeanna A. Mayhook

Libraries Faculty and Staff Supplemental Materials

Lesson plan for a 50 minute in-class standards module in MGMT 110: Introduction to Management and Information Strategies. Offered Fall 2021.

Mgmt 110 Introduction To Management And Information Strategies Fall 2021 Syllabus, Heather A. Howard, Zoeanna A. Mayhook, Annette Bochenek

Libraries Faculty and Staff Supplemental Materials

Syllabus for MGMT 110: Introduction to Management and Information Strategies offered Fall 2021.

Mgmt 110: Standards Group Challenge Assignment, Heather A. Howard, Annette Bochenek, Zoeanna A. Mayhook, Margaret Phillips

Libraries Faculty and Staff Supplemental Materials

Group project for MGMT 110: Introduction to Management and Information Studies covering the use of standards in business decision-making. Course offered Fall 2021.

Mgmt 110: Comparing Document Types Pre-Class Assignment, Margaret Phillips

Libraries Faculty and Staff Supplemental Materials

Pre-Class Standards Assignment in MGMT 110: Introduction to Management and Information Studies. Offered Fall 2021.

Mgmt 110: Pre And Post Module Standards Quiz, Margaret Phillips, Heather A. Howard

Libraries Faculty and Staff Supplemental Materials

Pre and Post module standards quiz for MGMT 110: Introduction to Management and Information Studies. Offered Fall 2021.

Collaboration In An Online Course Is Comparable To Collaboration In A Face-To-Face Course, Tonya M. Isabell, Nathan Mentzer

Indiana STEM Education Conference

Remote learning through various communication systems has been available as a teaching strategy for many years. During the COVID-19 pandemic, remote learning has become an important method of educational delivery available for K-12 and higher education as leaders follow the health and safety guidelines. However, in remote learning environments, active learning collaborative team projects are more complex. Many institutions of higher learning around the country began using a Hybrid-Flexible (HyFlex) instructional model in response to the current global pandemic where students can choose to take online or face to face sections of their course. The flexibility in the model allows …

Dynamic Simulations Of An Absorption System With Different Working Pairs At Chiller And Heat Pump Application, Jian Zheng, Jesús Castro, Carles Oliet

International Refrigeration and Air Conditioning Conference

This work describes the dynamic simulation of a direct air-cooled single effect solar-driven absorption system and demonstrates the numerical results of the absorption system with different working pairs. The working pairs used in the chiller mode are LiBr-H2O and Carrol-H2O (Carrol contains LiBr and EG -Ethylene glycol-with a mass ratio at 4.5:1), while in the heat pump mode, EG is introduced in the evaporator to avoid freezing problem which limits the operation condition. The numerical modelling was implemented on a modular object-oriented simulation platform (NEST platform tool), which allows the linking between different components, considered as objects, which can be …

Analysis Of Dynamic Heat Transfer Coefficient In A Reciprocating Compressor By Immersed Solid Method In Cfd, Rakesh Eettisseri, Marcelo Real, Sidnei Oliveira

International Compressor Engineering Conference

Accurate mapping of heat transfer inside the Hermetic compressor has been a major challenge for the designing and evaluation of performance. Various methodologies have been adopted for the thermal mapping such as experimental analysis, numerical methods, CFD etc. Mapping is further complex when the motions of multiple components are considered. In this work heat transfer is mapped inside a reciprocating hermetic compressor by considering the rotation of crankshaft and associated motion of connecting rod and piston. The refrigerant gas and oil in the sump are used as the working fluids for this conjugate heat transfer model. The motion is imposed …

An Analytical Tool To Determine The Optimum Counterweights For Multi-Cylinder Reciprocating Compressors, Salih Güvenç Uslu, Kaan Şengül

International Compressor Engineering Conference

The industrial air compressor market has been growing fast, thereby compelling the manufacturers to produce competitive products with less vibration and noise, which also better meet the customers’ expectations and related regulations. Both mechanical and hydrodynamical factors induce vibrations which have substantial negative effects in the maintenance periods and the lifetime of certain components. This study focuses on the balancing of the crankshaft by modifying the geometry of the counterweights. It aims at reducing the overall vibration of a compressor with the outputs of an analytical model which investigates the dynamics of the crankshaft of a W-type reciprocating compressor. The …

Thermodynamic Investigation And Design Concept Of A Bi-Directional Wankel Machine For Compression And Expansion In Natural Gas Storage And Distribution Applications, Thomas Werner Moesch, Konrad Klotsche, Gotthard Will, Christiane Thomas, Ullrich Hesse

International Compressor Engineering Conference

The distribution and storage of natural gas is based on different pressure levels. The pressure is increased by process gas compressors and currently reduced by throttling valves. The isenthalpic throttling leads to exergy losses. As part of an industry project the TU Dresden and the IME Aachen GmbH developed a bi-directional Wankel machine that may be used for both compression and expansion and thus recover some of the exergy losses. The Wankel machine uses rotary valves for suction and discharge control with fixed opening and closing angles in regards to the displacer rotation. This study shows the detailed design concept …

Characterizing Steady State Compressor Performance By Using Transient Test Data, Leon P. M. Brendel, Stephen L. Caskey, James E. Braun, Eckhard A. Groll

International Compressor Engineering Conference

Compressor testing is an essential task to characterize compressor performance, but often requires significant time to be executed. This study suggests a method that could greatly reduce time needed for compressor testing by inferring steady state performance from transient data rather than waiting for true steady state conditions to be measured. The key finding is that the overall isentropic efficiency in transient operation is almost identical to its true steady state performance value after applying very simple data processing. The paper describes a simple data processing method that extracts steady-state performance from transient data. The proposed processing should not be …

Vapor Stem Bubbles Dominate Heat Transfer Enhancement In Extremely Confined Boiling, A. A. Alsaati, D. M. Warsinger, J. A. Weibel, A. M. Marconnet

CTRC Research Publications

No abstract provided.

Oscillations Of A Ring-Constrained Charged Drop, Brayden W. Wagoner, Vishrut Garg, Michael T. Harris, Doraiswami Ramkrishna, Osman Basaran

School of Chemical Engineering Faculty Publications

Free drops of uncharged and charged inviscid, conducting fluids subjected to small-amplitude perturbations undergo linear oscillations (Rayleigh, Proc. R. Soc. London, vol. 29, no. 196–199, 1879, pp. 71–97; Rayleigh, Philos. Mag., vol. 14, no. 87, 1882, pp. 184–186). There exist a countably infinite number of oscillation modes, n=2,3,…" role="presentation" style="box-sizing: border-box; margin: 0px; padding: 0px; border: 0px; font-variant: inherit; font-stretch: inherit; line-height: normal; font-family: inherit; vertical-align: baseline; display: inline-table; word-spacing: normal; overflow-wrap: normal; white-space: nowrap; float: none; direction: ltr; max-width: none; max-height: none; min-width: 0px; min-height: 0px; position: relative;">n=2,3,…n=2,3,…, each of which has a characteristic frequency and mode shape. …

Pathways To Decarbonization Of Residential Heating, Alex Fridlyand, Paul Glanville, Michael Garrabrant

International High Performance Buildings Conference

Space and water heating are the largest consumers of energy in residential buildings, up to 85% in cold climates. In addition to conservation measures, improving the building thermal envelope and optimizing the heat and hot water distribution, improving the performance of the heating technology is critical to provide a pathway to significantly reduce carbon emissions, with a focus on existing buildings. Conventional fuel-fired heating systems that use existing infrastructure have approached their thermodynamic limit over the past 15-20 years. While the performance of electrically-driven heat pumps, that would use electricity produced at the margin in a fuel-switching scenario, have improved, …

Ultra-White Baso4 Paint And Film With Remarkable Radiative Cooling Performance, X. Li, J. Peoples, P. Y. Yao, X. Ruan

CTRC Research Publications

Radiative cooling is a passive cooling technology that offers great promises to reduce space cooling cost, combat the urban island effect, and alleviate the global warming. To achieve passive daytime radiative cooling, current state-of-the-art solutions often utilize complicated multilayer structures or a reflective metal layer, limiting their applications in many fields. Attempts have been made to achieve passive daytime radiative cooling with single-layer paints, but they often require a thick coating or show partial daytime cooling. In this work, we experimentally demonstrate remarkable full-daytime subambient cooling performance with both BaSO4 nanoparticle films and BaSO4 nanocomposite paints. BaSO4 has a high …

The Effect Of Uneven Heating On The Flow Distribution Between Parallel Microchannels Undergoing Boiling, A. Miglani, A. Soto, J.A. Weibel, S.V. Garimella

CTRC Research Publications

As the size, weight, and performance requirements of electronic devices grow increasingly demanding, their packaging has become more compact. As a result of thinning or removing the intermediate heat spreading layers, non-uniform heat generation from the chip-scale and component-level variations may be imposed directly on the attached microchannel heat sink. Despite the important heat transfer performance implications, the effect of uneven heating on the flow distribution in parallel microchannels undergoing boiling has been largely unexplored. In this study, a two-phase flow distribution model is used to investigate the impact of uneven heating on the flow distribution behavior of parallel microchannels …