Evolution of Galactic Outflows at z∼0z\sim0-22 Revealed with SDSS, DEEP2, and Keck spectra

We conduct a systematic study of galactic outflows in star-forming galaxies at $z\sim0$-$2$ based on the absorption lines of optical spectra taken from SDSS DR7, DEEP2 DR4, and Keck Erb et al. We carefully make stacked spectra of homogeneous galaxy samples with similar stellar mass distributions at $z\sim0$-$2$, and perform the multi-component fitting of model absorption lines and stellar continua to the stacked spectra. We obtain the maximum (v_\rm{max}) and central (v_\rm{out}) outflow velocities, and estimate the mass loading factors ($\eta$), a ratio of the mass outflow rate to the star formation rate (SFR). Investigating the redshift evolution of the outflow velocities measured with the absorption lines whose depths and ionization energies are similar (Na I D and Mg I at $z\sim0$-$1$; Mg II and C II at $z\sim1$-$2$), we identify, for the first time, that the average value of v_\rm{max} (v_\rm{out}) significantly increases by 0.05-0.3 dex from $z\sim0$ to $2$ at a given SFR. Moreover, we find that the value of $\eta$ increases from $z\sim0$ to $2$ by $\eta \propto (1 + z)^{1.2\pm0.3}$ at a given halo circular velocity v_\rm{cir} , albeit with a potential systematics caused by model parameter choices. The redshift evolution of v_\rm{max} (v_\rm{out}) and $\eta$ is consistent with the galaxy-size evolution and the local velocity-SFR surface density relation, and explained by high-gas fractions in high-redshift massive galaxies, which is supported by recent radio observations. We obtain a scaling relation of \eta \propto v_\rm{cir}^a for $a = -0.2 \pm 1.1$ in our $z\sim0$ galaxies that agrees with the momentum-driven outflow model ($a = -1$) within the uncertainty.Comment: 13 pages, 10 figures, ApJ in pres

Encouraging IS developers to learn business skills: an examination of the MARS model

Though prior research has recognized business skills as one of the keys to successful information system development, few studies have investigated the determinants of an IS developer’s behavioral intention to learn such skills. Based on the Motivation–Ability–Role Perception–Situational factors (i.e., the MARS model), this study argues that the intention of IS developers to acquire business skills is influenced by learning motivation (M), learning self-efficacy (A), change agent role perception (R), and situational support (S). Data collected from 254 IS developers are analyzed using the Partial Least Squares (PLS) technique. Results show that a developer’s intention to learn business skills is positively influenced by intrinsic learning motivation and both absolute and relative learning self-efficacy. Furthermore, in comparison to two other change agent roles, the advocate role leads to a significantly higher level of learning intention. Finally, work and non-work support positively influence both extrinsic and intrinsic learning motivation. Notably, non-work support has a greater impact on both absolute and relative learning self-efficacy. Our results suggest several theoretical and practical implications

Misdirected: The Real Enemy Behind the United States\u27 War Against Human Trafficking

The conversation surrounding the issue of human trafficking has long been misdirected and sensationalized in the United States, with government-backed anti-trafficking campaigns hyperfocused on the relationship between sex work and human trafficking rather than on the significantly more common phenomenon of labor trafficking, significantly amongst migrant laborers. The definition of human trafficking has become nearly synonymous with that of sex trafficking, both officially and colloquially — the result of legislation and public campaigning that claim to address trafficking as a whole, yet zero in exclusively on sex trafficking. This hyperfocus on sex work functions to both endanger the livelihoods of consenting sex workers and to neglect addressing the more pressing issue of labor trafficking in other industries, a deliberate misdirection noted by writer Jo Doezema in “What is Human Trafficking?” In her essay, Doezema and her fellow authors push for a reformed image of trafficking as a labor and migration issue, one that must be addressed by implementing specific measures to protect migrants and other marginalized people susceptible to being trafficked. The continued public ignorance about labor trafficking is a direct result of governmental protection and sanctioning of exploitative commercial practices. In this project, I explore the simultaneous prevalence and invisibility of the phenomenon of labor trafficking as the product of years of anti-sex work and anti-market regulation legislation, including the UN’s Protocol to Prevent, Suppress and Punish Trafficking in Persons Especially Women and Girls and Congress’s Abolish Human Trafficking Act of 2018.https://orb.binghamton.edu/research_days_posters_2021/1024/thumbnail.jp

An examination of the primary and secondary effects of cyber-bullying: development and testing of a cyber-bullying moderator/mediator model

This study examined cyber-bullying as a social transgression and the potentially negative effects it has on individuals, specifically adolescents and young adults from experiences recalled by college students. Findings established support for a moderator/mediator model, designed and tested for this study, that describes the psychological process prompted by a cyber-bullying message, which is moderated as well as mediated by several factors. This study examined the theoretical and practical value of the model in terms of being able to reflect the psychological process that individuals move through when exposed to a cyber-bullying message, and its ability to account for both primary and secondary effects of bullying. To accomplish these goals, a packet of standardized measurement tools were used and data were quantitatively analyzed. Findings support that adolescents and young adults who find themselves to be a target of a cyber-bullying message find that message to be negative and experience negative effects. Findings from this study add support to current cyber-bullying research and remind readers of the critically important nature of cyber-bullying in our society today

The Effects of Performance Feedback on Exercise, Physiological Reactivity, and Affective State among Hostile College Students

hostility has been found to be a risk factor for cardiovascular disease. One proposed pathway between hostility and cardiovascular disease is an increase in cardiovascular reactivity among hostile individuals when faced with challenging, competitive situations, in which interpersonal stressors are present. A potential situation that may elicit this exaggerated reactivity is found in cardiac rehabilitation exercise programs. Such factors may be competition and feedback regarding their performance. This study sought to find out how hostile individuals would respond physiologically, behaviorally, and affectively when presented with negative and positive performance feedback, while exercising in a challenging, competitive setting. It was found that the three groups (positive feedback, negative feedback, no feedback) did not differ on physiological reactivity, exercise behavior, or affect as a result of the type of feedback they received. Limitations of the study are discussed and improvements for future studies are suggested

Adult Romantic Attachment Style, Global Self-Esteem, and Specific Self-Views as Predictors of Feedback Preference in Potential Romantic Relationships

This study examined how adult romantic attachment (anxiety and avoidance dimensions), global self-esteem, and social and academic self-views relate to one another and how well they predict preference for a specific feedback type (enhancing, verifying, or no feedback) from a potential romantic partner in times of distress. It also investigated the relation between the type of feedback one receives and attraction to the partner who gives that type of feedback. Multiple regression analyses supported some predicted relations between romantic attachment and feedback preference. Neither global self-esteem nor social and academic self-views predicted preference for a particular feedback type, nor did social self-views moderate the relation between attachment and feedback preference. Although global self-esteem was found to moderate the relation between attachment style and feedback preference, the moderation effects were not in the predicted directions. However, academic self-views were found to moderate the relation between attachment and feedback preference. In addition, anxious and avoidant attachment related negatively to global self-esteem, social self-views, and academic self-view. Global self-esteem related positively to both social and academic self-views. Receiving one\u27s preferred feedback predicted attraction to the potential romantic partner who gave that type of feedback. Limitations of the study and direction for future research are discussed

Real Estate Mutual Funds: A Style Analysis

We find that the characteristics of real estate related securities are different from those of the general common equities. To help investors understand better the products offered by real estate mutual funds, we develop style descriptors that are specifically created for real estate related securities. Among the universe of real estate securities, we find real estate funds tilt toward large stocks and favor growth moderately over value. Growth managers outperform value mangers in this sector by 1.51% to 2.30% per year. However, there is evidence of shifts in the investment style among the funds. Our results help investors in evaluating real estate fund performance and making better asset allocation decisions

Knowledge withholding intentions in teams: the roles of normative conformity, affective bonding, rational choice and social cognition

The decision of members in a knowledge-intensive team to withhold their knowledge may threaten the performance of the team. To address the problem of knowledge resource risk in project teams, we maintain that it is important to understand why team members choose to withhold their knowledge, conceptualized as knowledge-withholding intention. In line with the literature on effort withholding, the research on multifoci relations between justice perceptions and social exchanges, and social cognitive theory, we proposed that the social exchange relationships that individuals form in the workplace, their perceptions of justice, and their knowledge withholding self-efficacy would influence their knowledge-withholding intentions. Through a survey of 227 information system development team workers, we found that all social exchange relationship variables had a significant impact on knowledge-withholding intentions. However, the justice perception variables only indirectly influenced knowledge-withholding intentions through the mediation of social exchange relationships. In addition, one of the task variables, task interdependence, influenced knowledge withholding intention through the mediation of knowledge withholding self-efficacy. Our results contribute to the knowledge management literature by providing a better understanding of the antecedents of knowledge withholding. We also offer suggestions for future research utilizing the framework of Kidwell and Bennett (1993) to study effort and knowledge withholding

Does Product Type Affect Electronic Word-of-Mouth Richness Effectiveness? Influences of Message Valence and Consumer Knowledge

Drawing on the information richness theory, this study attempts to address how valence of electronic word-of-mouth (eWOM), product type and consumer knowledge will yield different levels of eWOM richness. The results based on an experimental study suggest that negative eWOM has a stronger effect in producing eWOM information richness than does positive eWOM, and such effect is more pronounced for a leisure farm tour (experience goods) than for digital camera (search goods). The tendency that negative eWOM will provide richer information for the leisure farm tour is more evident for high-knowledge consumers than for low-knowledge consumers. The study’s results caution against the aggravated harm of negative eWOM incurred from the dissatisfactory experience of a leisure farm tour

Graduated Segmental Mobility in Polymer Layers on Silica

The behavior of thin polymer layers on oxide substrates has gotten a great deal of attention as the size of materials, and hence polymer films, has gotten smaller. Indeed, the properties of adsorbed polymers are such that they can be different from those of bulk polymers, especially when the films are very thin. A wide variety of studies have been made on adsorbed polymers and sometimes the results seem contradictory. One of the properties often measured in thin films is the apparent glasstransition temperature, Tg. In principle, many techniques are sensitive to phenomenological changes occurring around Tg and, therefore, can be compared to each other. For polymer thin films there are two surfaces (often different) to consider. For example, a thin polymer film on a solid substrate, such as silica, has a polymer-silica interface and a polymer-air interface. In principle, these two interfaces would be expected to have different properties. In addition, it is not always clear if either of these would dominate the properties measured. In this paper, we provide support for the existence of graduated segmental mobility in thin polymer films. As examples we cite the behavior observed from both deuterium NMR of poly(methyl acrylate)-d3 (PMA-d3) and modulated differential scanning calorimetry (MDSC) of poly(methyl methacrylate) (PMMA), both on silica powder. In Figure 1, we depict a surface with which the polymer has a favorable interaction. We propose that the segments at the polymer-air interface have enhanced mobility while those at the polymer-silica interfect have reduced mobility