The realization of an integrated Mach-Zehnder waveguide immunosensor in silicon technology

We describe the realization of a symmetric integrated channel waveguide Mach-Zehnder sensor which uses the evanescent field to detect small refractive-index changes (¿nmin ¿ 1 × 10¿4) near the guiding-layer surface. This guiding layer consists of ridge structures with a height of 3 nm and a width of 4 ¿m made in Si3N4. This layer has a thickness of 100 nm. The sensor device has been tested with glucose solutions of different bulk refractive indices. Results of a slab-model calculation are in good agreement with obtained experimental results. The feasibility of applying this sensor for immunosensing, detecting directly the binding of antigen to an antibody receptor surface, is shown with antibody-antigen binding experiments

Humor in satirical news headlines: Analyzing humor form and content, and their relations with audience engagement

Satirical news presents a critique of current affairs through humor. Previous research suggests that satirical news can have different humor forms (e.g. linguistic strategies) and humor contents (e.g. news topics, targets), and that such differences in humor characteristics can influence audience effects of satirical news. This paper extends this research by analyzing these relationships across different types of outlets in a content analysis (Study 1) and audience engagement analysis (Study 2). In Study 1, we compared humor forms and contents of satirical news headlines posted on Facebook (N = 5,775) between outlets from different countries (United States and the Netherlands) with different political leanings (liberal and conservative). Findings showed that the coded humor forms reasonably consistently characterized satirical news across outlet types, while humor contents did not. In Study 2, we examined associations of the humor characteristics with the number of likes and comments the Facebook posts received. Results were often outlet-specific, especially in case of the coded humor contents. This paper thus reveals that when satirical news’ audience effects differ by humor characteristics, this may be attributed less to differences in humor form, and more to differences in humor content.</p

Satire from a far-away land: Psychological distance and satirical news

Satirical news and its effects on outcomes such as appreciation and persuasion have gained considerable currency as a topic of research in mass communication studies. Through the framework of construal level theory, we investigated whether different levels of spatial distance influence these effects. In a between-subjects experiment, participants in the United Kingdom (UK; n = 282) and New Zealand (NZ; n = 370) read a satirical or non-satirical news text summarizing a study reporting on the negative impact of increased digital device screen time on young children. Depending on condition, the texts referred to entities and locations in either the participant’s own country (spatially close) or a foreign country (spatially distant). Results showed significant main effects of satirical news on audience perceptions, emotions, and attitudes. While there were no significant interactions between article type (satirical vs. regular news) and spatial distance (close vs. distant), our results indicated that satirical news was associated with higher perceptions of spatial distance for both the UK and NZ participants as well as higher perceptions of social distance for the NZ participants. Exploratory indirect-effects analyses found several indirect effects of satirical news through increased perceptions of spatial and social psychological distance on audience emotions, text perceptions, and attitudes. We take these results as initial evidence suggesting spatial and social distance are potential variables to consider in future investigations of satirical news

From the daily show to last week tonight: A quantitative analysis of discursive integration in satirical television news

Satirical news shows constitute an innovative hybrid genre that mixes regular news and fiction. The discursive integration hypothesis posits that the defining characteristic of satirical news shows is that news and fiction elements are integrated such that boundaries between the preexisting genres have blurred. The current study quantitatively tests this hypothesis on both long-running American shows such as The Daily Show and more recent shows such as Last Week Tonight. We collected transcripts of fifteen satirical news shows, eleven regular news shows, and fourteen fiction shows from 2018 (9,824,249 words). Transcripts were automatically tagged for over fifty linguistic features to identify register dimensions, patterns in linguistic features unique to genres, which we used to determine the presence of discursive integration. Findings revealed that two-thirds of satirical news shows were indeed characterized by discursive integration (which we labeled “complete hybrids”), while one-third manifested through the already existing hybrid genre of opinionated news (which we labeled “hybrid-genre echoes”). These two categories of shows demonstrate the importance of genre hybridity for defining satirical news across different shows

Laboratory observation of a nonlinear interaction between shear Alfv\'{e}n waves

An experimental investigation of nonlinear interactions between shear Alfv\'{e}n waves in a laboratory plasma is presented. Two Alfv\'{e}n waves, generated by a resonant cavity, are observed to beat together, driving a low frequency nonlinear psuedo-mode at the beat frequency. The psuedo-mode then scatters the Alfv\'{e}n waves, generating a series of sidebands. The observed interaction is very strong, with the normalized amplitude of the driven psuedo-mode comparable to the normalized magnetic field amplitude ($\delta B/B$) of the interacting Alfv\'{e}n waves.Comment: 10 pages, 4 figures, submitted to Phys. Rev. Let

Regularization of the Hamiltonian constraint and the closure of the constraint algebra

In the paper we discuss the process of regularization of the Hamiltonian constraint in the Ashtekar approach to quantizing gravity. We show in detail the calculation of the action of the regulated Hamiltonian constraint on Wilson loops. An important issue considered in the paper is the closure of the constraint algebra. The main result we obtain is that the Poisson bracket between the regulated Hamiltonian constraint and the Diffeomorphism constraint is equal to a sum of regulated Hamiltonian constraints with appropriately redefined regulating functions.Comment: 23 pages, epsfig.st

Continuous admission to primary school and mental health problems

Background: Younger children in a school class have higher rates of mental health problems if admission to primary school occurs once a year. This study examines whether this relative age effect also occurs if children are admitted to school continuously throughout the year. Methods: We assessed mental health problems based on parent-reports (using the Child Behavior Checklist, CBCL) and on professional assessments, among two Dutch national samples of in total 12,221 children aged 5-15 years (response rate: 86.9%). Results: At ages 5-6, we found a higher occurrence of mental health problems in relatively young children, both for mean CBCL scores (p = 0.017) and for problems assessed by child health professionals (p <0.0001). At ages 7-15, differences by relative age did not reach statistical significance. Conclusion: Continuous admission to primary school does not prevent mental health problems among young children, but may do so at older ages. Its potential for the prevention of mental problems deserves further study