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Search Results: 1 - 10 of 237562 matches for " Daniel L. Reinholz "
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Attending to lifelong learning skills through guided reflection in a physics class
Dimitri R. Dounas-Frazer,Daniel L. Reinholz
Physics , 2015, DOI: 10.1119/1.4930083
Abstract: This paper describes a tool, the Guided Reflection Form (GRF), which was used to promote reflection in a modeling-based physics course. Each week, students completed a guided reflection and received feedback from their instructors. These activities were intended to help students become better at the process of reflection, developing skills that they could apply in their future learning. We analyzed student reflections: (1) to provide insight into the reflection process itself and (2) to describe common themes in student reflections. Most students were able to use the GRF to reflect on their learning in meaningful ways. Moreover, the themes present in student reflections provide insights into struggles commonly faced by physics students. We discuss the design of the GRF in detail, so that others may use it as a tool to support student reflections.
Towards a Model of Systemic Change in University STEM Education
Daniel L. Reinholz,Joel C. Corbo,Melissa H. Dancy,Noah Finkelstein,Stanley Deetz
Physics , 2014,
Abstract: Despite numerous calls for the transformation of undergraduate STEM education, there is still a lack of successful models for creating large-scale, systemic cultural changes in STEM departments. To date, change efforts have generally focused on one of three areas: developing reflective teachers, disseminating curricula and pedagogy, or enacting institutional policy. These efforts illustrate many of the challenges of departmental change; in particular, they highlight the need for a holistic approach that integrates across all three of these levels: individual faculty, whole departments, and university policymakers. To address these challenges, as part of our campus-wide AAU-sponsored effort in STEM education transformation, we import and integrate models of change from multiple perspectives. We draw from models in organizational change, from departmental and disciplinary change in STEM education, and from efforts to support individual efforts such as the development and dissemination model. As a result, our departmental cultural change efforts are an attempt at holistic reform. We will discuss our theoretical underpinnings and ground this theory in a sample of approaches in two departments.
A Framework for Transforming Departmental Culture to Support Educational Innovation
Joel C. Corbo,Daniel L. Reinholz,Melissa H. Dancy,Stanley Deetz,Noah Finkelstein
Physics , 2014,
Abstract: This paper provides a research-based framework for promoting institutional change in higher education. To date, most educational change efforts have focused on relatively narrow subsets of the university system (e.g., faculty teaching practices or administrative policies) and have been largely driven by implicit change logics; both of these features have limited the success of such efforts at achieving sustained, systemic change. Drawing from the literature on organizational and cultural change, our framework encourages change agents to coordinate their activities across three key levels of the university and to ground their activities in the various change perspectives that emerge from that literature. We use examples from a change project that we have been carrying out at a large research university to illustrate how our framework can be used as a basis for planning and implementing holistic change.
Teaching lab the Compass way: Engaging students in authentic research practices and guided self-reflection
Punit R. Gandhi,Jesse A. Livezey,Anna M. Zaniewski,Daniel L. Reinholz,Dimitri R. Dounas-Frazer
Physics , 2014,
Abstract: Aligning science instruction with authentic scientific practices is a national priority in education. In particular, undergraduate laboratory courses have been criticized as employing recipe-style activities with little emphasis on inquiry and design. This paper offers an alternative laboratory-style course, offered via the Compass Project at UC Berkeley. Using a model-based approach, undergraduate physics students engaged in authentic research practices by iteratively refining their experimental and theoretical designs. The course also promoted lifelong learning skills, such as persistence and organization, through a cycle of student self-reflection and personalized instructor feedback. This cycle is a strategy for providing students with sociocultural support, which is particularly important for students from underrepresented groups in the sciences. We document growth in students' understanding of scientific measurement and, drawing on student reflections, we suggest areas for future research focused on improving students' lifelong learning skills.
Minimal residual disease and circulating tumor cells in breast cancer
Michail Ignatiadis, Monica Reinholz
Breast Cancer Research , 2011, DOI: 10.1186/bcr2906
Abstract: Breast cancer (BC) is the most common cancer in women in Europe [1]. Despite surgery and adjuvant systemic therapy, many women with early BC still relapse and die of their disease. Minimal residual disease (MRD) after potentially curative surgery for BC is thought to contribute to disease relapse and to be the target of adjuvant treatment. MRD is defined as micrometastatic cells undetectable by conventional imaging and laboratory tests. Surrogates of MRD are tumor cells detected in the bone marrow (disseminated tumor cells (DTCs)) and peripheral blood (circulating tumor cells (CTCs)) [2]. The detection and characterization of DTCs/CTCs are expected to lead to personalized treatment strategies and accelerate the development of novel therapeutic agents for BC [2]. Furthermore, genotypic and phenotypic characterization of DTCs/CTCs at the single cell level may provide novel insights into the biology of tumor progression [3].The detection of DTCs/CTCs in BC is challenging since these cells are rare, occurring at a frequency of one tumor cell per 106 to 107 mononuclear cells. To isolate DTCs/ CTCs, enrichment techniques are therefore typically applied. These techniques are based either on the physical properties of the cells (for example, cell density by ficoll centrifugation or cell size by filtration) or on their immunological characteristics (for example, cell surface antigens of DTCs/CTCs by immunoenrichment or markers of hematopoietic cells by immunodepletion). Ficoll centrifugation was widely used in the initial clinical studies of bone marrow DTCs [4]. Currently, however, enrichment techniques incorporating immunomagnetically labeled monocolonal antibodies are more often used because they improve tumor cell recovery (recovery rates of >50% to 85%) [5,6] over ficoll enrichment (recovery rate of 40%) [7] in spiking experiments using cell lines. After the initial enrichment step, DTCs/CTCs have been detected using assays based on either antibodies (immunocytochemistr
Dielectric function beyond RPA: kinetic theory vs. linear response theory
Heidi Reinholz,Gerd R?pke
Physics , 2011,
Abstract: Calculating the frequency dependent dielectric function for strongly coupled plasmas, the relations within kinetic theory and linear response theory are derived and discussed in comparison. In this context, we proof the Kohler variational principle for arbitrary frequencies. It can be shown to be a special case of the Zubarev method for the construction of a non-equilibrium statistical operator from the principle of the extremum of entropy. Within kinetic theory, the commonly used energy dependent relaxation time approach is strictly valid only for the Lorentz plasma in the static case. It is compared with the result from linear response theory that includes electron-electron interactions and applies for arbitrary frequencies, including bremsstrahlung emission. It is shown how a general approach to linear response encompasses the different approximations and opens options for systematic improvements.
Penetrating Trauma Resulting in Ventricular Septal Defect  [PDF]
Daniel Juneau, Daniel Hermann, Gretchen L. Wells
World Journal of Cardiovascular Surgery (WJCS) , 2014, DOI: 10.4236/wjcs.2014.45012
Abstract: Most ventricular septal defects (VSDs) are congenital. Acquired VSDs are generally due to myocardial infarction. An unusual case of VSD from penetrating trauma is described. In this case, the lack of a hemopericardium at presentation led the treatment team not to pursue cardiac pathology. Once the patient developed heart failure, the diagnosis of a VSD was made. Patients with penetrating chest wounds should undergo echocardiography, as such lesions may not be detected by physical examination or chest exploration.
Using Critical Incidents to Validate the Direct Measurement of Attribute Importance and Performance When Analyzing Services  [PDF]
Stephanie L?ffler, Daniel Baier
Journal of Service Science and Management (JSSM) , 2013, DOI: 10.4236/jssm.2013.65A001

Since its introduction into the marketing literature by Martilla and James, the Importance-Performance Analysis has proven multiple times to be a cost-effective technique for measuring attribute importance and performance of services for the customer. Additionally, it gives managers valuable hints in order to improve their products and services. However, despite a long list of successful applications overtime one critical aspect remains—the validation of the importance values by direct measurement. Besides the limitations and critics that accompanied with stated importance techniques, a lot of research results show that it is better to use direct methods in place of indirect measures. Some researchers suggest measuring the customers’ priority structure to compensate the critical points within the direct questioning. This study shows how the critical incident technique can be helpful for the validation of such results.

Bayesian Conjoint Analysis in Water Park Pricing: A New Approach Taking Varying Part Worths for Attribute Levels into Account  [PDF]
Stephanie L?ffler, Daniel Baier
Journal of Service Science and Management (JSSM) , 2015, DOI: 10.4236/jssm.2015.81006
Abstract: Nowadays, the application of conjoint analysis for measuring customers’ preferences for goods and services is wide-spread in marketing. A sample of customers is confronted with fictive offers and asked for evaluations. From these responses part worths for attribute levels of the offers are estimated and used to develop an optimal design and pricing for an offer. However, especially in tourism, it can be observed that attribute importance not only differs between customers but also varies over a single customer’s usage situations and her/his mood. In this paper, we propose a measurement approach that respects this variation. Part worths are stochastically modeled and estimated using Bayesian procedures. The approach is applied to design and price a water park.
Quantization and Stable Attractors in a DissipativeOrbital Motion  [PDF]
Daniel L. Nascimento, Antonio L. A. Fonseca
Journal of Modern Physics (JMP) , 2011, DOI: 10.4236/jmp.2011.24030
Abstract: We present a method for determining the motion of an electron in a hydrogen atom, which starts from a field Lagrangean foundation for non-conservative systems that can exhibit chaotic behavior. As a consequence, the problem of the formation of the atom becomes the problem of finding the possible stable orbital attractors and the associated transition paths through which the electron mechanical energy varies continuously until a stable energy state is reached.
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