Determination of ball bearing dynamic stiffness

The dynamic radial stiffness characteristics of rolling element bearings are currently determined by analytical methods that have not been experimentally verified. These bearing data are vital to rotating machinery design integrity because accurate critical speeds and rotor stability predictions are highly dependent on the bearing stiffness. A tester was designed capable of controlling the bearing axial preload, speed, and rotor unbalance. The rotor and support structures were constructed to permit critical speeds that are predominantly determined by a 57 mm test bearing. A curve of calculated critical speed versus stiffness was used to determine the actual bearing stiffness from the empirical data. The results of extensive testing are used to verify analytical predictions, increase confidence in existing bearing computer programs, and to serve as a data base for efforts to correct these programs

Ethnic Identity and Immigrant Homeownership

Immigrants are much less likely to own their homes than natives, even after controlling for a broad range of life-cycle and socio-economic characteristics and housing market conditions. This paper extends the analysis of immigrant housing tenure choice by explicitly accounting for ethnic identity as a potential influence on the homeownership decision, using a two-dimensional model of ethnic identity that incorporates attachments to both origin and host cultures. The evidence suggests that immigrants with a stronger commitment to the host country are more likely to achieve homeownership for a given set of socioeconomic and demographic characteristics, regardless of their level of attachment to their home country.Ethnicity, ethnic identity, immigration, immigrant integration, homeownership

Ethnic Identity and Immigrant Homeownership

Immigrants are much less likely to own their homes than natives, even after controlling for a broad range of life-cycle and socio-economic characteristics and housing market conditions. This paper extends the analysis of immigrant housing tenure choice by explicitly accounting for ethnic identity as a potential influence on the homeownership decision, using a two-dimensional model of ethnic identity that incorporates attachments to both origin and host cultures. The evidence suggests that immigrants with a stronger commitment to the host country are more likely to achieve homeownership for a given set of socioeconomic and demographic characteristics, regardless of their level of attachment to their home country.ethnicity, ethnic identity, immigration, immigrant integration, homeownership

Evolutionary Physiology: The extent of C4 and CAM photosynthesis in the Genera Anacampseros and Grahamia of the Portulacaceae

The Portulacaceae is one of the few terrestrial plant families known to have both C(4) and Crassulacean acid metabolism (CAM) species. There may be multiple origins of the evolution of CAM within the Portulacaceae but the only clear evidence of C(4) photosynthesis is found in members of the genus Portulaca. In the Portulaca, CAM succulent tissue is overlaid with the C(4) tissue in a unique fashion where both pathways are operating simultaneously. Earlier reports have shown that the clade containing the genera Anacampseros and Grahamia may also contain C(4) photosynthetic species similar to the Portulaca, which would indicate multiple origins of C(4) photosynthesis within the family. The aim of the present study was to ascertain the true photosynthetic nature of these genera. An initial survey of the carbon isotope composition of the Anacampseros ranged from -12.6 per thousand to -24.0 per thousand, indicating very little CAM activity in some species, with other values close to the C(4) range. Anacampseros (=Grahamia) australiana which had been previously identified as a C(4) species had a carbon isotope composition value of -24.0 per thousand, which is more indicative of a C(3) species with a slight contribution of CAM activity. Other Anacampseros species with C(4)-like values have been shown to be CAM plants. The initial isotope analysis of the Grahamia species gave values in the range of -27.1 per thousand to -23.6 per thousand, placing the Grahamia species well towards the C(3) photosynthetic range. Further physiological studies indicated increased night-time CO(2) uptake with imposition of water stress, associated with a large diurnal acid fluctuation and a marked increased phosphoenolpyruvate carboxylase activity. This showed that the Grahamia species are actually facultative CAM plants despite their C(3)-like carbon isotope values. The results indicate that the Grahamia and Anacampseros species do not utilize the C(4) photosynthetic pathway. This is the first to identify that the Grahamia species are facultative CAM plants where CAM can be induced by water stress. This work supports earlier physiological work that indicates that this clade containing Anacampseros and Grahamia species comprises predominantly facultative CAM plants. This report suggests there may be only one clade which contains C(4) photosynthetic members with CAM-like characteristics

Inactivation of pathogens on food and contact surfaces using ozone as a biocidal agent

This study focuses on the inactivation of a range of food borne pathogens using ozone as a biocidal agent. Experiments were carried out using Campylobacter jejuni, E. coli and Salmonella enteritidis in which population size effects and different treatment temperatures were investigate

Data Ethics and Privacy for Researchers

This workshop addresses specific data privacy and anonymization standards and techniques for researchers that are collecting personally identifiable information as well as sensitive information. The workshop covers federal, state, and international laws and regulations governing data privacy, the development of an impact assessment and privacy policy. The second half of the workshop focuses on ethical workflows, anonymization techniques and related resources

Navigating Content & Peer Review in an Online Journal

This session explores the use of Digital Commons as both a hosting site and peer review and management tool for the creation of an online journal. In 2018 Florida International University (FIU) Libraries launched Athenaeum: Scholarly Works of the FIU Libraries Faculty and Staff. Athenaeum is meant to collect both published and unpublished articles, conference posters, and presentations of library faculty and staff as they pertain to librarianship. The goal is to provide librarians with another discovery layer for their scholarly work and to help new librarians acquire peer reviewed articles by offering peer review before inclusion in Athenaeum. In this session, we will discuss the pros, cons, and challenges associated with managing the collection as a journal. We will discuss the steps involved in finding peer reviewers and then managing the peer review process within Digital Commons, creating a submission form that caters to previously peer-reviewed articles as well as those requiring peer review, and how to submit articles already in Digital Commons. We will address the concerns expressed by those who wish not to have the statistics for their articles already in Digital Commons duplicated. We will briefly discuss the inclusion guidelines made for articles in the collections in regards to language, supporting materials, and the criteria for accepting items such as posters and presentations. Finally, we will explore how to motivate FIU librarians to participate in Athenaeum

Navigating Content and Peer Review in an Online Journal

This session explores the use of Digital Commons as both a hosting site and peer review and management tool for the creation of an online journal. In 2018 Florida International University (FIU) Libraries launched Athenaeum: Scholarly Works of the FIU Libraries Faculty and Staff. Athenaeum is meant to collect both published and unpublished articles, conference posters, and presentations of library faculty and staff as they pertain to librarianship. The goal is to provide librarians with another discovery layer for their scholarly work and to help new librarians acquire peer reviewed articles by offering peer review before inclusion in Athenaeum. In this session, we will discuss the pros, cons, and challenges associated with managing the collection as a journal. We will discuss the steps involved in finding peer reviewers and then managing the peer review process within Digital Commons, creating a submission form that caters to previously peer-reviewed articles as well as those requiring peer review, and how to submit articles already in Digital Commons. We will address the concerns expressed by those who wish not to have the statistics for their articles already in Digital Commons duplicated. We will briefly discuss the inclusion guidelines made for articles in the collections in regards to language, supporting materials, and the criteria for accepting items such as posters and presentations. Finally, we will explore how to motivate FIU librarians to participate in Athenaeum

Using Social Science to Create a Better Survey

This presentation is a summary of concepts related to survey creation that were originally presented in a 6 week course at the University of Michigan on creating surveys in the social sciences. It includes references and links to the course

How Libraries are Meeting Researcher Needs in the Digital Humanities

This presentation will provide guidance for those considering the creation of a digital humanities (DH) lab, as well as for those with a current functional DH lab. The Digital Scholars Studio at Florida International University (FIU) was created in 2016 with the purpose of providing needed technology and collaborative space for researchers and students. We will explore the challenges experienced by restricted space and budget and discuss how we resolved these specific limitations before continuing with an in-depth look at programming and usage of DH software and tools. We will take a look at a few current projects our researchers are working on in their fields in order to better understand current needs and interests in using DH labs and the technologies most preferred by researchers and students. The hope is that this presentation will engender a lively discussion and sharing of thoughts, questions, and experiences that attendees will find useful. Participants should leave with a good understanding of what is essential in the development of a DH lab and how to increase usage and interest in a DH lab while conquering the technical aspects of creating and running one with all the associated technology and applications