Quantitative posture analysis of 2D, 3D, and optical microscope visualization methods for microsurgery tasks

The purpose of this paper is to present a quantitative posture analysis of microsurgery tasks performed with different visualization methods. Microsurgery is traditionally performed using a binocular microscope; however surgeons are constrained by the optical eyepieces and are forced to assume joint angles that deviate away from neutral postures. This may be especially problematic for the neck and can increase surgeon discomfort and fatigue. Alternative visualization methods may improve surgeon posture by eliminating the constraints imposed by the microscope. This study examines both 2D and 3D heads-up displays as possible alternatives. Six subjects performed microsurgical tasks with each visualization methods for four hours. Quantitative posture analysis was done using Maxtraq software that tracks reflective markers on the subjects. The initial analysis of neck, upper arm, and elbow angles found significant differences between each display. A biomechanical analysis found that the differences in angles can result in loads on the neck joint that are twice as high in the microscope than the headsup displays. Although the alternative displays can result in better postures, improvements the display technology is needed to improve microsurgical task performance.     

Standardization of surgical procedures for identifying best practices and training

A taxonomy was developed a) to describe surgical procedures with sufficient detail to review differences among surgeons, b) to examine the relationship between individual technique and outcomes, c) to enable surgeons to standardize technique around best practices and d) to identify clinical-evidence-based key points of teaching and assessment for surgical training. Sixty-seven microvascular anastomoses were recorded through video cameras mounted in the dissecting microscope. A hierarchical task analysis was used to decompose the observed procedures into successive levels of detail. The results were then presented to individual and small groups of microvascular surgeons to help define steps and step attributes necessary to describe a procedure so that other surgeons can perform the procedure exactly the same way. Coincidently, it was found that because the surgeons' attention is confined to a very small field of view in which they can see only the veins and arteries and the ends of their instruments, they often have difficulty communicating with others in the operating room. Analyses of selected cases using the proposed taxonomy shows how subtle details are revealed that may affect outcomes, and indicate specific training needs. By comparing different methods and outcomes, it should be possible to identify best practices for given conditions.     

The added value of virtual reality technology and force feedback for surgical training simulators

Laparoscopic surgery requires more specialized training of the surgeons than traditional open surgery. The Virtual Basic Laparoscopic Surgical Trainer (VBLaST) is being developed as a virtual version of the Fundamentals of Laparoscopic Skills (FLS) trainer. This study assessed the current haptic and virtual reality (VR) technology of a virtual peg transfer task of the VBLaST, based on the subjective preference of surgeons and their objective task performance measures. Twenty-one surgical residents, fellows and attendings performed a peg-transfer task in the FLS and the VBLaST. Each subject performed 10 trials on each simulator. Results showed that subjects performed significantly better on the FLS than on the VBLaST. Subjects showed a significant learning effect on both simulators, but with an accelerated improvement on the VBLaST. Even so, 81% of the subjects preferred the FLS over the VBLaST for surgical training which could be attributed to the novelty of the VR technology and existing deficiencies of the haptic interface. Despite the subjective preference for the physical simulator, the performance results indicate an added value of VR and haptics in surgical training, which is expected to be demonstrated in more surgically relevant tasks such as suturing and knot-tying.     

The implicit assumptions of television research: an analysis of the 1982 NIMH report on television and behavior

The authors analyze some of the assumptions underlying most current research on television. They emphasize the dependence on (1) an individual rather than an institutional level of analysis; (2) a model of research utilization that pays little explicit attention to where sources of leverage lie for changes in programming; (3) extremely simple models of the selection processes associated with different levels of television viewing; and (4) uncritical appraisals of the consequences of effects that many would call small or modest. These issues are illustrated by a general discussion of the NIMH report on Television and Behavior and specific discussion of "mainstreaming" and the effects of television violence. In 1972, POQ's editors invited Leo Bogart to prepare an extended review article of the Surgeon-General's Study of Television and Social Behavior (POQ 36:491-521). When the 10-year follow-up study was released by NIMH in 1982, the editors asked Thomas D. Cook, a distinguished psychologist noted for his research on television, to perform the same function.     

The King is Dead,Long Live the King: Tall Tales of New Men and New Management in The Bill

This article argues that the new styles of management and new styles of masculinity promoted in the discourse of new public management (NPM) are not offering anything new at all. Through a semiotic analysis of the characters and behaviour depicted in the British television police drama, The Bill, we are able to make this explicit. The visual aspects and the time constraints of television communication produce a condensed representation of larger and more covert social phenomena. The episodes we have selected depict a moment of rapid organizational change within the workplace and offer a rich site to explore the implementation of a new policing order and the related repackaging of hegemonic masculinity. In this respect, gender and genre are an inextricable mix and display a remarkable resistance to change.     

CORPORATE PRODUCTIVITY GROWTH: CHAMPIONS, LEADERS, AND LAGGARDS

This paper examines the relative productivity growth performance of a sample of large UK firms between 1986 and 1995. We find that superior productivity growth, however measured, is not persistent—firms with high productivity growth rates relative to (say) the average in 1 yr are as likely as not to display below-average performance in the following year. Studying the determinants of the length of time for which firms outperform their peers, we find that innovative firms carrying low debt who are relatively free from financial distress are likely to display whatever persistently superior performance we observe in the data. ( JEL D24, O33, O4)     

Video ethology: Television as a data base for cross-cultural studies in nonverbal displays

This demonstration study attempts to indicate how live television programming might provide an economical and easily-accessed source of material for cross-cultural investigation. This study compared the nonverbal displays of emotion for American and Canadian television game show contestants. Results suggested that although Americans and Canadians did not differ significantly in the types of emotions displayed, Americans were rated as being significantly more expressive in their emotional display. In addition, Americans differed from Canadians in their forms of nonverbal display. American females were seen as using their hands more than the Canadian females. American males were seen to smile more than their Canadian counterparts. Discussion explored how methodology introduced in this study could be conveniently expanded to more conclusively explore culturally determined display rules. Consideration of current video cassette technology facilitating this form of investigation was discussed.This research was supported by the Social Sciences and Humanities Research Council of Canada under grant number 410-84-0640.     

Parenting Practices and Adolescent Sexual Behavior: A Longitudinal Study

The effects of parental attitudes, practices, and television mediation on adolescent sexual behaviors were investigated in a study of adolescent sexuality and media (N = 887). Confirmatory factor analyses supported an eight‐factor parenting model with television mediation factors as constructs distinct from general parenting practices. Logistic regressions indicated that adolescents reporting greater parental disapproval and limits on viewing at Wave 1 were less likely to initiate oral sex between Waves 1 and 2. Adolescents who reported more sexual communication with parents were more likely to initiate oral sex. Results for vaginal intercourse were similar to those for oral sex. Coviewing was a significant negative predictor of initiation of sexual behavior. Parental attitudes and television mediation can delay potentially risky adolescent sexual behaviors.     

Emotional displays in children's television programming

The facial expressions of emotion and the circumstances under which the expressions occurred in a sample of the most popular children's television programs were investigated in this study. Fifteen-second randomly selected intervals from episodes of five television programs were analyzed for displays of happiness, sadness, anger, fear, disgust, and surprise. In addition, the contexts in which the emotions occurred were examined. Results indicated that particular emotional expressions occurred at significantly different frequencies and that there was an association between emotional displays and emotion-contexts. The high rate of emotional displays found in television shows has implications for the development of knowledge regarding emotional display rules in viewers.We are grateful to Sharon Galligan for assistance in coding part of the data and to Carolyn Saarni and Amy Halberstadt for helpful comments on an earlier draft of this paper. This research was supported in part by a grant from the National Institute of Disabilities and Rehabilitation Research, #GOO85351. The opinions expressed herein do not necessarily reflect the position or policy of the U.S. Department of Education.     

Towards a Sociology of Disclosure: The Case of Surgical Performance

Despite the increasingly widespread emphasis on the need for transparency in health‐care and elsewhere, there is limited evidence regarding the consequences of disclosing medical performance data. The evidence is disparate and has not been synthesised in a coherent way. This paper focuses on surgical performance, whose measurement is generally often seen as straight forward. It begins by outlining the context for understanding the publication of such data and then presents an analytical framework as a vehicle for conceptualising the nature of disclosure in surgery and health‐care more generally. The framework addresses key dimensions concerning one surgical specialty (cardiac surgery) and its relationship with a range of stakeholders in an English context. In particular, we examine the interaction between surgeons and between surgeons, patients, managers and policy‐makers. These relationships are framed in terms of choice and calculativeness, strategies and tactics, and trust, and need to be understood at micro, meso and macro levels. We conclude by considering how this framework provides a research agenda for a sociology of disclosure.     

The backbone of bipartite projections: Inferring relationships from co-authorship,co-sponsorship,co-attendance and other co-behaviors

The analysis and visualization of weighted networks pose many challenges, which have led to the development of techniques for extracting the network's backbone, a subgraph composed of only the most significant edges. Weighted edges are particularly common in bipartite projections (e.g. networks of co-authorship, co-attendance, co-sponsorship), which are often used as proxies for one-mode networks where direct measurement is impractical or impossible (e.g. networks of collaboration, friendship, alliance). However, extracting the backbone of bipartite projections requires special care. This paper reviews existing methods for extracting the backbone from bipartite projections, and proposes a new method that aims to overcome their limitations. The stochastic degree sequence model (SDSM) involves the construction of empirical edge weight distributions from random bipartite networks with stochastic marginals, and is demonstrated using data on bill sponsorship in the 108th U.S. Senate. The extracted backbone's validity as a network reflecting political alliances and antagonisms is established through comparisons with data on political party affiliations and political ideologies, which offer an empirical ground-truth. The projection and backbone extraction methods discussed in this paper can be performed using the -onemode- command in Stata.     

Effects of visual and verbal sexual television content and perceived realism on attitudes and beliefs

Previous studies of the effects of sexual television content have resulted in mixed findings. Based on the information processing model of media effects, I proposed that the messages embodied n such content, the degree to which viewers perceive television content as realistic, and whether sexual content is conveyed using visual or verbal symbols may influence the nature or degree of such effects. I explored this possibility through an experiment in which 182 college undergraduates were exposed to visual or verbal sexual television content, neutral television content, or no television at all prior to completing measures of sexual attitudes and beliefs. Although exposure to sexual content generally did not produce significant main effects, it did influence the attitudes of those who perceive television to be relatively realistic. Verbal sexual content was found to influence beliefs about women's sexual activity among the same group.     

Effects of visual and verbal sexual television content and perceived realism on attitudes and beliefs

Previous studies of the effects of sexual television content have resulted in mixed findings. Based on the information processing model of media effects, I proposed that the messages embodied in such content, the degree to which viewers perceive television content as realistic, and whether sexual content is conveyed using visual or verbal symbols may influence the nature or degree of such effects. I explored this possibility through an experiment in which 182 college undergraduates were exposed to visual or verbal sexual television content, neutral television content, or no television at all prior to completing measures of sexual attitudes and beliefs. Although exposure to sexual content generally did not produce significant main effects, it did influence the attitudes of those who perceive television to be relatively realistic. Verbal sexual content was found to influence beliefs about women's sexual activity among the same group.     

Development of Three‐Dimensional Completion of Complex Objects

Three‐dimensional (3D) object completion, the ability to perceive the backs of objects seen from a single viewpoint, emerges at around 6 months of age. Yet, only relatively simple 3D objects have been used in assessing its development. This study examined infants’ 3D object completion when presented with more complex stimuli. Infants (N = 48) were habituated to an “L”‐shaped object shown from a limited viewpoint; then they were tested with volumetrically complete (solid) and incomplete (hollow) versions of the object. Four‐month‐olds and 6‐month‐old girls had no preference for either display. Six‐month‐old boys and both sexes at 9.5 months of age showed a novelty preference for the incomplete object. A control group (N = 48), only shown the test displays, had no spontaneous preference. Perceptual completion of complex 3D objects requires infants to integrate multiple, local object features and thus may tax their nascent attentional skills. Infants might use mental rotation to supplement performance, giving an advantage to young boys. Examining the development of perceptual completion of more complex 3D objects reveals distinct mechanisms for the acquisition and refinement of 3D object completion in infancy.     

Ergonomic considerations in natural orifice translumenal endoscopic surgery (NOTES): a case study

Surgical technique evolved from traditional open surgery to laparoscopic surgery, offering patients reduced pain and quick recovery. Recently, a new approach called natural orifice translumenal endoscopic surgery (NOTES) has emerged. In NOTES, procedures may be transvaginal, transgastric, or transrectal or transesophageal. NOTES procedures present new ergonomic challenges to surgeons due to visualization and tissue manipulation challenges. An ergonomic analysis of NOTES cholecystectomy was conducted. As there is currently no standardization for performing NOTES, this analysis presents the results as a case study. Results showed NOTES procedures impose unique limitations on the surgeon's ability to perform surgical tasks autonomously, requiring collaboration and coordination amongst the surgical team members.     

Why social work should care: Television violence and children

There is an abundance of research on the influence of television violence on children. The convergence of research demonstrates an association between heavy viewing of violence and aggressive behavior. Despite thirty years of research, regulatory policy has failed to decrease violence on children's television. Children exposed to high rates of violence on television may be at greater risk of developing school and social problems. This paper highlights both research and theory which explains the relationship of television violence to children. It further makes the case that television violence should be an important and legitimate concern for social work.Ms. Lazar is an Associate Professor of Social Work at the University of Southern Maine and a Doctoral student at Simmons School of Social Work.     

Young people's resilience and post-financial crisis television: allegories of economic and social survival

ABSTRACT

The Global Financial Crisis (GFC) of 2007–2008 added significant stress and anxieties to the already precarious lives of many young people. Despite this, there is emerging evidence that young people are able to demonstrate remarkable resilience in the midst of economic uncertainties that render the trajectories of their futures uncertain. The pressure to be resilient, to find effective ways to manage the uncertainties inherent to the liberal democracies of the twenty-first century, can be significant. The consequences of failure include deteriorating health and well-being, losses in motivation and hope, economic marginalisation, and ambivalence about the markers of what is means to be an adult. In this paper we spotlight moments in post-GFC television that have drawn on these social narratives, depicting young people's experiences of resilience and uncertainties. We view these moments as more than just television or popular culture. The stories we tell are allegorical, but they are not mere fictions. We focus on the popular television comedy Broad City (2014-) that focusses on the marginalised lifeworlds of trendy, college-educated, young hipsters Ilana and Abbi who are barely getting by in New York City.     

UNSCRIPTED DRAMA: SOCCER AUDIENCE RESPONSE TO SUSPENSE,SURPRISE, AND SHOCK

By modeling minute-by-minute television audience figures from English Premier League soccer matches, with close to 50,000 minute-observations, we show that demand is partly driven by suspense and surprise. We also identify an additional relevant factor of appeal to audiences, namely shock, which refers to the difference between pre-match and current game outcome probabilities. Suspense, surprise, and shock remain significant in the presence of a traditional measure of outcome uncertainty. (JEL C23, D12, L82, L83, Z20)     

Large-Scale Observational Evidence of Cross-Cultural Differences in Facial Behavior

Self-report studies have found evidence that cultures differ in the display rules they have for facial expressions (i.e., for what is appropriate for different people at different times). However, observational studies of actual patterns of facial behavior have been rare and typically limited to the analysis of dozens of participants from two or three regions. We present the first large-scale evidence of cultural differences in observed facial behavior, including 740,984 participants from 12 countries around the world. We used an Internet-based framework to collect video data of participants in two different settings: in their homes and in market research facilities. Using computer vision algorithms designed for this dataset, we measured smiling and brow furrowing expressions as participants watched television ads. Our results reveal novel findings and provide empirical evidence to support theories about cultural and gender differences in display rules. Participants from more individualist cultures displayed more brow furrowing overall, whereas smiling depended on both culture and setting. Specifically, participants from more individualist countries were more expressive in the facility setting, while participants from more collectivist countries were more expressive in the home setting. Female participants displayed more smiling and less brow furrowing than male participants overall, with the latter difference being more pronounced in more individualist countries. This is the first study to leverage advances in computer science to enable large-scale observational research that would not have been possible using traditional methods.