It is interesting to explore, the circadian locomotor activity rhythm of dark adapted fishes. Therefore, it is aimed to investigate the circadian locomotor activity rhythm of catfish, Heteropneustes ...fossilis under different light regi-mens- light-dark condition LD 12:12, constant dark condition DD, constant light LL and dark-light condition DL 12:12 in both male and female. The study was conducted sequentially under LD 12: 12 (LON 0500 and LOFF 1700) and thereafter under the DD, LL and DL each for at least 10-12 consecutive days. The locomotor activity was monitored using Stanford Chronobiology Kit at a fixed period of 24 h. The three rhythm parameters obtained were Mesor (M, rhythm-adjusted 24-h average), amplitude (A) and acrophase (peak, Ø). All fish exhibited a statistically significant (p<0.001) circadian rhythm in locomo-tor activity under all light regimens LD, DD, LL and DL. The circadian ampli-tude was significantly declined under constant DD and LL. A significant shift was displayed in the circadian acrophase in all fish under each photic re-gimes LD, DD, LL and DL. The effect of light condition on M, A and Ø was sig-nificant, while gender imposed no effect. Chi-square periodogram revealed τ > 24 h in locomotor activity of most of the replicates under DD and LL. The respective study suggests that the endogenous circadian clocks in catfish H.fossilis are weakly expressed under constant conditions and requires light-dark LD or dark- light DL cues to generate/express the circadian rhythm in locomotor activity.
The information on the circadian characteristics of catfish in shoals is scanty. We examined the circadian locomotor activity rhythm of catfish Heteropneustes fossilis either singly housed (SS1) or ...in shoals of four (SS4) and six (SS6) under different light regimens. We carried out the study sequentially under LD
1
(12:12), constant darkness (DD), LD
2
, continuous light (LL), LD
3
, and DL (12:12). Each condition was for at least 10-12 consecutive days. We analyzed the time-series data by employing Cosinor rhythmometry to detect circadian rhythm characteristics in locomotor activity at a fixed time window with a τ = 24 h. Results indicated that singly housed or shoals exhibited statistically significant (p < .001) circadian rhythm in locomotor activity under LD conditions with a higher activity level during the dark phase. Further, we observed free-running rhythms in locomotor activity under DD and LL, irrespective of the shoal sizes. In phase inverse DL, both singly housed and shoals demonstrated higher activity in the dark phase. The two-way ANOVA results revealed a significant effect of the factor 'light regimen' on amplitude and acrophase; the factor 'shoal size' produced a statistically significant impact on the mesor only. Both shoals showed significantly higher mesor than singly housed fish. The circadian amplitude declined under constant conditions of DD and LL. The locomotor activity rhythm exhibited a free-running pattern with a τ
FR
greater than 24 h under both DD and LL conditions. We conclude that light is a more prominent factor for the entrainment of circadian activity in catfish H. fossilis. However, the extent of social aggregation (shoal size) has little or no effects on the characteristics of circadian locomotor activity rhythm in H. fossilis.
Eyewitness identifications play a key role in the justice system, but eyewitnesses can make errors, often with profound consequences. We used findings from basic science and innovative technologies ...to develop and test whether a novel interactive lineup procedure, wherein witnesses can rotate and dynamically view the lineup faces from different angles, improves witness discrimination accuracy compared with a widely used procedure in laboratories and police forces around the world-the static frontal-pose photo lineup. No novel procedure has previously been shown to improve witness discrimination accuracy. In Experiment 1, participants (N = 220) identified culprits from sequentially presented interactive lineups or static frontal-pose photo lineups. In Experiment 2, participants (N = 8,507) identified culprits from interactive lineups that were either presented sequentially, simultaneously wherein the faces could be moved independently, or simultaneously wherein the faces moved jointly into the same angle. Sequential interactive lineups enhanced witness discrimination accuracy compared with static photo lineups, and simultaneous interactive lineups enhanced witness discrimination accuracy compared with sequential interactive lineups. These finding were true both when participants viewed suspects who were of the same or different ethnicity/race as themselves. Our findings exemplify how basic science can be used to address the important applied policy issue on how best to conduct a police lineup and reduce eyewitness errors.
Public Significance StatementCompared with the photographic identification parade procedure used routinely by police forces worldwide, this article suggests that a novel interactive procedure can increase witness identifications of guilty suspects, while simultaneously minimizing witness identifications of innocent suspects, for both own-race and other-race identifications. This highlights that an interactive procedure, developed using psychological theory and technology, could reduce the significant societal, economic, and psychological costs associated with eyewitness misidentifications.
Anomaly detection in multimedia datasets is a widely studied area. Yet, the concept drift challenge in data has been ignored or poorly handled by the majority of the anomaly detection frameworks. The ...state-of-the-art approaches assume that the data distribution at training and deployment time will be the same. However, due to various real-life environmental factors, the data may encounter drift in its distribution or can drift from one class to another in the late future. Thus, a one-time trained model might not perform adequately. In this paper, we systematically investigate the effect of concept drift on various detection models and propose a modified Adaptive Gaussian Mixture Model (AGMM) based framework for anomaly detection in multimedia data. In contrast to the baseline AGMM, the proposed extension of AGMM remembers the past for a longer period in order to handle the drift better. Extensive experimental analysis shows that the proposed model better handles the drift in data as compared with the baseline AGMM. Further, to facilitate research and comparison with the proposed framework, we contribute three multimedia datasets constituting faces as samples. The face samples of individuals correspond to the age difference of more than ten years to incorporate a longer temporal context.
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•The proposed extension of AGMM better handles catastrophic forgetting.•Modes in AGMM can grow or shrink, facilitating dynamic and unconstrained memory.•A prior estimate of memory requirement in AGMM is no longer needed.•We contribute three datasets with intra-class and inter-class drift for benchmarking.
Background: Nearly every family in the world is touched by cancer, which is now responsible for almost one in six deaths globally. Aim of this study was to access Indian woman's awareness towards ...cervical screening methods to promote strategies for increasing its uptake.Methods: A comprehensive questionnaire based cross-sectional observational survey was conducted in Pt. JNM Medical College and Dr. BRAM hospital, Raipur, Chhattisgarh from September 2018 to July 2019. Participants were selected by sampling between 21 to 59 years of age who have given consent for study.Results: Out of 1008 participants only 336 (33.3%) participants were aware about screening of cervical cancer and less than 28% participants were aware about pap smear, time of investigation, method of pap smear, health centre, association of HPV virus with cervical cancer, availability at vaccination, and with regard to risk factors only 27.9% women were aware that there is increased risk of cervical cancer due to multiple partners, 17.6% aware of risk due to increase in number of children’s, 11.1% aware of increase in risk of cervical cancer due to early initiation of sexual activity. Younger women (age 30-35, odds ratio 1.24, 95% CI 0.78-1.32, p-value 0.05), low socioeconomic status (odds ratio 1.74, 95% CI 0.76-2.12, p-value 0.01), education level (≤ secondary education odds ratio 1.64 95% CI 0.85-2.18 p-value 0.000, ≥ higher secondary or above education odds ratio 2.32 95% CI 1.21-2.89 p-value 0.001) and age at marriage (odds ratio 2.21, 95% CI 0.78-2.18, p-value 0.000) all had a significant relationship with the awareness of Pap smear test. Two-third of the females in the study stated that lack of awareness as the major reason for not getting a pap smear while another one- third stated lack of recommendation by health care professionals as major hurdle.Conclusions: This study found that woman's fear, pain and embarrassment, along with cultural influences, deterred them from undergoing screening.
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