The computation of wave lengths of molecular hydrogen between 5415 and 5810.

Thesis (M.A.)--Boston University N.B.:Pages missing : 3, 15. Only one copy was available.This thesis presents the results of calculations undertaken to obtain the wavelengths of certain lines in the molecular spectrum of hydrogen. These lines lie in the range 5145 A to 5810 A. The spectrogram on which the lines are recorded was taken by Dr. Reginald G. Lacount, who exposed the plate in a Littrow-mount spectrograph at Boston University, using a hydrogen discharge tube as a source. [Truncated

Companion Animal Demographics in the United States: A Historical Perspective

Modern American society recognizes the crucial role of data and information in evaluating and effectively addressing societal problems. Americans are bombarded with information on the economy, public health, social and psychological attitude trends, and other matters that are considered important. For example, no self-respecting politician would think of launching a political campaign or initiative without some sense of what the public might be worrying about. Addressing pet population issues should be no different. Data are needed in order to define the nature and scope of the dog and cat demographic challenge. Data can help people to understand the impact of “pet homelessness” on companion animals; to identify some of the characteristics of both successful and failed human-animal relationships; and to develop sound, effective, and long-lasting solutions that will strengthen humans’ relationships with companion animals and enhance companion animals’ welfare. Given the need for reliable data, what is known now about trends concerning the companion animal population and the shelters that help address the “homelessness” problem

It’s Not All About Price: Factors associated with roll-your-own tobacco use among young people - a qualitative study

Background: Smoking prevalence in Ireland is falling in all age groups, but the prevalence of roll-your-own (RYO) tobacco use is rising among young people. This qualitative study aims to explore and understand the factors associated with young people\u27s use of RYO products. Methods: Semi-structured individual and focus group interviews were conducted with young people aged 16-22 years. Participants were recruited from a higher education institution and youth organisations working with early school leavers across Dublin. In total, there were 62 participants in the study, consisting of 22 individual interviews and eight focus group interviews with 40 participants. Categoric and thematic data analysis was used to generate the findings. Results: We identified two broad themes, incentivising and disincentivising factors. The lower cost of RYO products compared to pre-manufactured cigarettes was the most important incentive for users. However, other product characteristics, such as the artisanal factors associated with RYO products were also found. Social and environmental influences were apparent, in which certain groups and environments facilitated and normalised RYO practices. Amenities and facilities often provided smokers with normalised spaces which could be dedicated to the enactment of rolling practices and to the creation and maintenance of social bonds with other users. Disincentives included negative features related to the product itself, adverse health effects, and the effects of tobacco denormalisation. Conclusions: While the lower cost of RYO products is very important for young smokers, other product characteristics and influences also incentivise and disincentivise use. A more comprehensive understanding of the multi-dimensional appeal of these products will assist policymakers to target strategies to reduce the attractiveness to young smokers of these products

A noninvasive method for in situ determination of mating success in female American lobsters (Homarus americanus)

Despite being one of the most productive fisheries in the Northwest Atlantic, much remains unknown about the natural reproductive dynamics of American lobsters. Recent work in exploited crustacean populations (crabs and lobsters) suggests that there are circumstances where mature females are unable to achieve their full reproductive potential due to sperm limitation. To examine this possibility in different regions of the American lobster fishery, a reliable and noninvasive method was developed for sampling large numbers of female lobsters at sea. This method involves inserting a blunt-tipped needle into the female's seminal receptacle to determine the presence or absence of a sperm plug and to withdraw a sample that can be examined for the presence of sperm. A series of control studies were conducted at the dock and in the laboratory to test the reliability of this technique. These efforts entailed sampling 294 female lobsters to confirm that the presence of a sperm plug was a reliable indicator of sperm within the receptacle and thus, mating. This paper details the methodology and the results obtained from a subset of the total females sampled. Of the 230 female lobsters sampled from George's Bank and Cape Ann, MA (size range = 71-145 mm in carapace length), 90.3% were positive for sperm. Potential explanations for the absence of sperm in some females include: immaturity (lack of physiological maturity), breakdown of the sperm plug after being used to fertilize a clutch of eggs, and lack of mating activity. The surveys indicate that this technique for examining the mating success of female lobsters is a reliable proxy that can be used in the field to document reproductive activity in natural populations

Program Knowledge and Savings in a Child Development Account Experiment

This study investigates whether participants’ program knowledge is associated with savings outcomes in Child Development Accounts and whether differences in program knowledge explain racial and ethnic disparities in savings outcomes. Analyses of data collected from treatment participants in the SEED for Oklahoma Kids (SEED OK) experiment (N = 1,39) indicate that knowledge of SEED OK program features is low: on average, participants are aware of 1.24 of three features, and averages are lower among Blacks and Hispanics. Logit and Tobit regressions show that program knowledge is positively related to likelihood of holding a SEED OK participant-owned account and to individual savings amounts. Program knowledge is estimated to contribute to racial disparities in savings outcomes: if Whites and minorities had the same levels of program knowledge, gaps in savings outcomes would significantly decline. These findings challenge the assumption, based in neoclassical economics, that individuals participate in savings programs if benefits from incentives outweigh costs of participation. Findings call for the development of policy designs and communication tools to enhance knowledge of program features among participants, especially members of racial and ethnic minorities

Past or present? The treatment of cultural heritage and tangible assets in central European capital cities

The cultural heritage landscape of any town or city will change over time; new monuments appear, old ones are taken down and others neglected. This is often in relation to political change or significant events in a country’s history when heritage is frequently used as a tool for countries to present a particular version of the past or political thought. This thesis presents an exploration of the cultural heritage and tangible assets of three selected Central European capital cities, in order understand how the treatment of such things informs us of the political and social climate of a place, in addition to providing a methodology for future research. Six field trips across three Central European capital cities; Berlin, Budapest, and Zagreb were undertaken, with the heritage sites visited built into a dataset. The dataset forms the backbone of this study and allowed me to draw out and present a number of patterns in the treatment of heritage across these cities. This is complimented by a methodology that explores these sites further through a variety of lenses. The results of the study show that, whilst each city is unique in their history and presentation of heritage, there are identifying themes that help us to understand the treatment of cultural heritage and tangible assets in other urban landscapes, as well as well as providing insight into the cities themselves. In addition, this study presents a methodology for how we can analyse cultural heritage and tangible assets across other locations

Just checking it out? Motivations for and behavioral associations with visiting "Slutpages" in the United States and Australia

“Slutpages” are a pernicious form of online image-based evaluative voyeurism (OIBEV), whereby (sexualized) images of women are posted on webpages for (predominantly) male groups to rate and comment. Despite media and public concern, OIBEV sites have garnered limited empirical study. This paper presents the first analysis of OIBEV site visitation motivations across United States and Australian samples. Participants comprised a convenience sample of 1148 young adults aged 18 to 29 years (M = 22.54, SD = 2.50); 53.0% women, 47.0% men; 54% residing in the U.S. and 46% in Australia. Respondents completed an online questionnaire. Overall, 23% of United States and 16% of Australian respondents had visited OIBEV sites. OIBEV site visitation was uniquely associated with gender and country (with men and United States being more likely to visit OIBEV sites), requesting and disseminating sexts and having one’s own image shared. Cyberbullying perpetration was associated with reduced odds of OIBEV site visitation. Motivations differed by gender, with men (80%) being most likely to visit sites to “check them out” while women were equally likely to check it out (41%) or to see if they were depicted (36%). For men, unique predictors of OIBEV site visitation were having requested, disseminated and received disseminated sexts, lower levels of anxiety and reduced likelihood of cyberbullying perpetration. For women, OIBEV site visitation was uniquely associated with being a United States resident, sext dissemination victimization, receipt of disseminated sexts, higher levels of anxiety but reduced stress. Our findings confirm that OIBEV sites represent a highly gendered form of online image-based sexual abuse, and may have important mental health implications, given the associations with increased anxiety. Our results support the need for “slutpage” education for adolescents and young adults to address social and peer norms that encourage and support non-consensual use of intimate images

The role of consent and motivations in sext dissemination

Sext dissemination (i.e., the online sharing of sexually explicit images) has the potential to result in legal, social, and psychological harms. Recent research has shown that this behavior can be consensual or non-consensual in nature; yet little is known about how motivations or attitudes may differ between these forms, or with gender. This study is based on a cross-sectional online survey investigating consensual and non-consensual sext dissemination and associated demographic, behavioral, attitudinal, and psychological factors. Participants were 2,126 cisgendered adults aged 18 to 30 years (M = 22.97, SD = 3.21, 55% women, 45% men), resident in Western, English-speaking nations, particularly Australia. Around 10% of respondents reported disseminating texts, and of these, only 19.8% indicated they had permission for this, with no differences across gender. When sexts were disseminated “to gossip,” this was significantly more likely to be non-consensual. There were no significant differences between consensual and non-consensual dissemination in subjective attitudes or norms toward dissemination, nor levels of psychological distress. Women were more likely to non-consensually disseminate sexts that had been received as unwanted or unwelcome. Consensual dissemination was weakly associated with being sexually active and having given consent to having one’s own images disseminated. We discuss implications for future research regarding consent, and relationship and sexuality education. © The Author(s) 2023