Post-processing Procedures for Passive GPS based Travel Survey

AbstractA challenge in posteriori data processing for passive GPS based travel survey, which constitute the heart of this paper, is to develop a series of methods to automatically restore the sequences of data points, both in space and time. It means the trips and activities occurred in the survey time should be identifiable chronologically and those identified by the program should respect this definition convention. Reference to the research results of our colleagues, and by combining the experiences of other French travel survey and personal mobility survey at Lille, a series of methods has been developed and put into application. The data outcome is ready for further applications

Changes of dendritic cells and fractalkine in type 2 diabetic patients with unstable angina pectoris: a preliminary report

<p>Abstract</p> <p>Background</p> <p>It has been shown that dendritic cells (DCs) and fractalkine play a role in accelerating progression of the inflamed atherosclerotic lesions and plaque rupture. We evaluated the numbers and functional changes of DCs and its subsets in human type 2 diabetes with or without unstable angina pectoris (UAP).</p> <p>Methods</p> <p>The study population consisted of 39 diabetic patients (DM:18 without CAD; DM + UAP: 21 with UAP), 18 non-diabetic UAP patients (UAP), and 15 healthy control (Normal). Peripheral blood DCs and its subsets were measured by three color flow cytometry. Serum levels of fractalkine, IL-12, and IFN-α were also measured. The functional status of the monocyte-derived DCs was analyzed by flow cytometry and allogeneic mixed T lymphocytes reaction.</p> <p>Results</p> <p>The percent and absolute numbers of DCs and mDC within the total leukocyte population was similar for Normal and DM, while significantly lower in DM + UAP. pDC numbers were not significantly altered. Serum fractalkine in DM + UAP was highest among the four groups (<it>p </it>= 0.04 vs. UAP, <it>p </it>= 0.0003 vs. DM, <it>p </it>< 0.0001 vs. Normal). Circulating mDC inversely correlated with serum fractalkine (r = -0.268, <it>p </it>= 0.01) level. Compared with DM and UAP, the costimulatory molecules CD86 and proliferation of T cells stimulated by DCs were significantly increased in DM + UAP group.</p> <p>Conclusions</p> <p>Our study suggested that increases in the fractalkine level and the number and functional changes of blood DCs might contribute to diabetic coronary atherosclerosis and plaque destabilization.</p

Quantifying fetal heart health in gestational diabetes: a new approach with fetal heart quantification technology

ObjectiveThis study aimed to assess the impact of gestational diabetes mellitus (GDM) on fetal heart structure and function using a technique called fetal heart quantification (Fetal HQ), with a focus on mitochondrial dynamics, which employs advanced imaging technology for comprehensive analysis.MethodsA total of 180 fetuses with normal heart structures, aged 24–40 weeks of gestation, were examined. A 2–3 s cine loop in the standard four-chamber oblique view was captured and analyzed using the speckle-tracking technique with Fetal HQ. Various echocardiographic parameters were evaluated, including four-chamber view (4CV), global spherical index (GSI), global longitudinal strain (GLS), 24-segment spherical index (SI), ventricular fractional area change (FAC), cardiac output (CO), and stroke volume (SV). These parameters were compared between the GDM group and the control group during two gestational periods: 24+0 to 28+0 weeks and 28+1 to 40+1 weeks. Statistical analysis was performed using independent samples t-tests and Mann-Whitney U tests to identify significant differences.ResultsTwenty fetuses from mothers with GDM and 40 from the control group were recruited at 24+0 to 28+0 weeks. At 28+1 to 40+1 weeks, 40 fetuses from mothers with GDM and 80 from the control group were recruited. The fetal left ventricular global longitudinal function was similar between the GDM and control groups. However, compared to the controls, right ventricular function in the GDM group was lower only at 28+1 to 40+1 weeks. In the GDM group, the global spherical index (GSI) was lower than in the control group at 28+1 to 40+1 weeks (1.175 vs. 1.22; p = 0.001). There were significant decreases in ventricular FAC (38.74% vs. 42.83%; p &lt; 0.0001) and 4CV GLS for the right ventricle (−22.27% vs. −26.31%; p = 0.005) at 28+1 to 40+1 weeks.ConclusionOur findings suggest that GDM is associated with decreased right ventricular function in the fetal heart, particularly during the later stages of pregnancy (28+1 to 40+1 weeks), compared to fetuses from healthy pregnancies. The Fetal HQ technique represents a valuable tool for evaluating the structure and function of fetal hearts affected by GDM during the advanced stages of pregnancy

When will one help? Understanding audience intervention in online harassment of women journalists

While online harassment directed towards women journalists are under wide discussion, the mechanism of audience intervention in stopping online harassment is less explored. Integrating bystander invention, ambivalent sexism, and social identity theories, we propose and test an integrative framework of audience intervention in online harassment of women journalists. Results from an online experiment in Hong Kong showed that type of harassment, ideological similarity between the audience member and the harassed journalist, and the presence of other responsive bystanders could shape the appraisal of harassment incidents and willingness to intervene. The study advances the literature by clarifying the contextual nuances and challenges of audience intervention in online harassment of women journalists. It bears practical implications on how to defend women journalists so as to protect press freedom, cultivate journalist-audience relationship, and enhance an inclusive and egalitarian online space

Effects of Counter Tillage and Slope Gradient on Nutrient Losses on Sloping Farmland

Counter tillage is a typical cultivation practice on the Loess Plateau, which can influence the soil erosion process by intercepting runoff and increasing infiltration. However, few studies have investigated the mechanisms of nutrient losses associated with counter tillage. This study was conducted to reveal the effects of counter tillage and slope gradient on the soil nutrient loss mechanism on sloping farmland. In this study, the rainfall simulation was conducted with a rainfall intensity of 90 mm·h−1 and with five slope gradients (5.24%, 8.75%, 17.63%, 26.79%, 36.40%). The runoff plots involved the counter tillage (CT) and traditional plow (CK), in order to investigate the characteristics of soil erosion and available phosphorus (AP), ammonium nitrogen (NH4+-N) and nitrate nitrogen (NO3−-N) losses. The soil erosion characteristics included the time until runoff generation, RR (runoff rate), and SR (sediment rate); the nutrient loss characteristics included nutrient loss concentrations, nutrient loss and nutrient loss rate in runoff or sediment. The results indicated that the RR and SR with a slope gradient of 5.24~26.79% on CT decreased by 11.77~94.92% and 20.69~99.27%, respectively, compared with that of CK. As the slope gradient increased (36.40%), a break in the ridge occurred and the reduction in the RR and SR was weakened; this was likely to be close to that of the CK. Nutrient losses differed significantly between different slope gradients and tillage practices. Nutrient losses increased with an increasing slope gradient. The nutrient losses of AP, NH4+-N, and NO3−-N in runoff, with the slope gradient of 36.40%, increased 75.75%, 76.34%, 75.63%; meanwhile, in sediment, it increased 32.93, 30.70, 32.18 times, compared with the slope gradient of 5.24% on CT. The CT with the slope gradient of 5.24~26.79% had a good effect in controlling nutrient losses; however, for the slope gradient of 36.40%, the effects of CT in controlling nutrient losses decreased. The nutrient loss rate and RR or SR satisfied a linear positive correlation. The reduction benefits of nutrient losses on CT in runoff and sediment can reach 57.7% to 100% and 45.5% to 100%, respectively. In conclusion, CT is an effective tillage practice to control soil erosion and nutrient losses. This study can provide a reference for soil erosion and nutrient loss control on sloping farmland on the Loess Plateau

The Chinese Smog Crisis as Media Event: Examining Twitter Discussion of the Documentary Under the Dome

Media event theory examines how viewers take part in live televised events despite lack of physical presence. The media event scholarship has rarely considered how technologies like the Internet reconfigure the dynamics of such events. Drawing on Chinese language users’ Twitter discussion about Under the Dome, a high-profile 2015 documentary about air pollution in China, this article uses social network and content analyses to examine the mechanisms of media events in the networked digital space. Diverse actors engaged in the distribution and interpretation of this media event, most of whom were individual actors. Two subnetworks are revealed on Twitter: the disengaged one mainly distributed links to the documentary, and the engaged one actively discussed the documentary. While Twitter discussion of Under the Dome lacked broad and sophisticated discourse, we still find promising signs of public discussion on the smog issue and public policy in the long run. Theoretically, this study underscores the potential of integrating media event and framing theories to tackle the refashioned nature of media events. Empirically, the findings allow us to better understand how a wide range of individual and institutional actors co-stage and co-interpret media events by leveraging the technological and communicative affordances of Twitter

Putting out fire with gasoline in Tahrir Square: Revisiting the Gamson hypothesis.

This study situates the Gamson hypothesis in the non-Western country of Egypt with an attempt to explore the relationship between the Gamson typology and political behavior in a country that has traditionally been under an authoritarian regime. Furthermore, this study suggests that additional factors might play important roles in the traditional relationship; it examines a possible link among media use, political corruption, and political rights to the Gamson typology based on a representative national survey conducted in Egypt. Several results differed from studies conducted in the Western world. Dissidents were more likely to engage in conventional political activities, which goes against the Gamson hypothesis. High efficacy regardless of trust level predicted conventional activities. This study aims not only to enrich the model but also to enhance our understanding of the diverse nature of the relationships among the Gamson typology and perceptions of political system, media use, and political activities in a non-Western authoritarian state

sj-png-3-crx-10.1177_00936502221130837 – Supplemental material for Selective Avoidance: Understanding How Position and Proportion of Online Incivility Influence News Engagement

Supplemental material, sj-png-3-crx-10.1177_00936502221130837 for Selective Avoidance: Understanding How Position and Proportion of Online Incivility Influence News Engagement by Shuning Lu, Hai Liang and Gina M. Masullo in Communication Research</p

sj-png-2-crx-10.1177_00936502221130837 – Supplemental material for Selective Avoidance: Understanding How Position and Proportion of Online Incivility Influence News Engagement

Supplemental material, sj-png-2-crx-10.1177_00936502221130837 for Selective Avoidance: Understanding How Position and Proportion of Online Incivility Influence News Engagement by Shuning Lu, Hai Liang and Gina M. Masullo in Communication Research</p

A New Surrogate Safety Measure Considering Temporal–Spatial Proximity and Severity of Potential Collisions

Accurate identification and analysis of traffic conflicts through surrogate safety measures (SSMs) are crucial for safety evaluation in road systems. Existing SSMs for conflict identification and analysis mostly consider the temporal–spatial proximity of conflicts without taking into account the severity of potential collisions. This makes SSMs unsuitable for traffic safety evaluation in complex road environments. In order to address the shortcomings above, this study first introduces a new SSM called the Potential Conflict Risk Index (PCRI). To validate the effectiveness of PCRI, the inD dataset is adopted for conflict identification comparison between time-to-collision (TTC) and PCRI. Using PCRI, this study conducts a conflict analysis in the freeway merging areas based on the data from the Outer Ring Expressway Dataset (ORED), accounting for differences between cars and trucks. The comparative results between TTC and PCRI show that PCRI can provide a more comprehensive identification of conflicts and a more accurate identification of the moment with the highest conflict risk. The results of conflict analysis suggest that conflicts occur more frequently in situations involving trucks, and these conflicts commonly occur in closer proximity to the on-ramp at freeway merging areas. The findings from this study can improve the accuracy of conflict identification under different conflict patterns, enhancing the specificity of traffic safety measures and ultimately ensuring the safety of road systems