Universal hydrodynamic flow in holographic planar shock collisions

We study the collision of planar shock waves in AdS$_5$ as a function of shock profile. In the dual field theory the shock waves describe planar sheets of energy whose collision results in the formation of a plasma which behaves hydrodynamically at late times. We find that the post-collision stress tensor near the light cone exhibits transient non-universal behavior which depends on both the shock width and the precise functional form of the shock profile. However, over a large range of shock widths, including those which yield qualitative different behavior near the future light cone, and for different shock profiles, we find universal behavior in the subsequent hydrodynamic evolution. Additionally, we compute the rapidity distribution of produced particles and find it to be well described by a Gaussian.Comment: 23 pages, 15 figures, published versio

Peripartum cardiomyopathy: diagnosis and management

No abstract available

Beyond arousal and valence: the importance of the biological versus social relevance of emotional stimuli

The present study addressed the hypothesis that emotional stimuli relevant to survival or reproduction (biologically emotional stimuli) automatically affect cognitive processing (e.g., attention, memory), while those relevant to social life (socially emotional stimuli) require elaborative processing to modulate attention and memory. Results of our behavioral studies showed that (1) biologically emotional images hold attention more strongly than do socially emotional images, (2) memory for biologically emotional images was enhanced even with limited cognitive resources, but (3) memory for socially emotional images was enhanced only when people had sufficient cognitive resources at encoding. Neither images’ subjective arousal nor their valence modulated these patterns. A subsequent functional magnetic resonance imaging study revealed that biologically emotional images induced stronger activity in the visual cortex and greater functional connectivity between the amygdala and visual cortex than did socially emotional images. These results suggest that the interconnection between the amygdala and visual cortex supports enhanced attention allocation to biological stimuli. In contrast, socially emotional images evoked greater activity in the medial prefrontal cortex (MPFC) and yielded stronger functional connectivity between the amygdala and MPFC than did biological images. Thus, it appears that emotional processing of social stimuli involves elaborative processing requiring frontal lobe activity

Optimal selection and ordering of columns in supersaturated designs

Two methods to select columns for assigning factors to work on supersaturated designs are proposed. The focus of interest is the degree of non-orthogonality between the selected columns. One method is the exhaustive enumeration of selections of p columns from all k columns to find the exact optimality, while the other is intended to find an approximate solution by applying techniques used in the corresponding analysis, aiming for ease of use as well as a reduction in the large computing time required for large k with the first method. Numerical illustrations for several typical design matrices reveal that the resulting “approximately” optimal assignments of factors to their columns are exactly optimal for any p. Ordering the columns in E(s2)-optimal designs results in promising new findings including a large number of E(s2)-optimal designs

Studi Prevalensi Keracunan Pestisida Pada Petani Penyemprot Sayur Di Desa Mendongan Kecamatan Sumowono Kabupaten Semarang

Mendongan village is one of the producers of vegetables in the use of pesticides are still high, of which 100% of the farmers in the village Mendongan use pesticides to kill pests. Results of preliminary studies, 75% of farmers do not use full protective equipment when spraying vegetables. In Semarang District also has been no monitoring of pesticide poisoning by the District Health Office and there has been no thorough assistance of puskesmas officers related to the use of pesticides by farmers. The purpose of this study was to determine the prevalence of pesticide poisoning in spraying vegetable farmers in the village Mendongan Sumowono District of Semarang District. The research location is in the village Mendongan Sumowono District of Semarang District. This study was observational analytic with cross sectional study design. Samples of this study were 38 respondents. Data analysis using Chi Square. The results showed a 44.7% level of knowledge is not good, the frequency of spraying 5.3% often, completeness APD 31.6% of respondents did not complete, 97.4% of respondents working lives long, long hose down 26.3%> 3 hours a day, spraying 2.6% one time, the dose of pesticides used 28.9% of respondents do not match, the wind direction while spraying 5.3% in the opposite direction, and the amount of pesticides 31.6%> 3 types. Cholinesterase level examination results showed 100% of respondents are still in a state of normal. The result of the relationship of nine independent variables studied there is no meaningful relationship to lower levels of cholinesterase in the blood of farmers, but based on the value of RP (Prevalence Ratio) when spraying (PR = 1.768; 95% CI = 1.330 to 2.334) and wind direction (PR = 1.800; 95% CI = 1.344 to 2.411) are risk factors for low levels of cholinesterase. The conclusion from this study that the prevalence of poisoning in spraying vegetable farmer in the village Mendongan Sumowono District of Semarang District of 0

Updating existing emotional memories involves the frontopolar/orbitofrontal cortex in ways that acquiring new emotional memories does not

In life, we must often learn new associations to people, places, or things we already know. The current fMRI study investigated the neural mechanisms underlying emotional memory updating. Nineteen participants first viewed negative and neutral pictures and learned associations between those pictures and other neutral stimuli, such as neutral objects and encoding tasks. This initial learning phase was followed by a memory updating phase, during which participants learned picture-location associations for old pictures (i.e., pictures previously associated with other neutral stimuli) and new pictures (i.e., pictures not seen in the first phase). There was greater frontopolar/orbito-frontal (OFC) activity when people learned picture–location associations for old negative pictures than for new negative pictures, but frontopolar OFC activity did not significantly differ during learning locations of old versus new neutral pictures. In addition, frontopolar activity was more negatively correlated with the amygdala when participants learned picture–location associations for old negative pictures than for new negative or old neutral pictures. Past studies revealed that the frontopolar OFC allows for updating the affective values of stimuli in reversal learning or extinction of conditioning [e.g., Izquierdo, A., & Murray, E. A. Opposing effects of amygdala and orbital PFC lesions on the extinction of instrumental responding in macaque monkeys. European Journal of Neuroscience, 22, 2341–2346, 2005]; our findings suggest that it plays a more general role in updating associations to emotional stimuli

Pengaruh Molar Rasio Tetracalcium Phosphate Dan Dicalcium Phosphate Dan Penambahan Chitosan Sebagai Gelling Agent Dalam Sintesis Pasta Calcium Phosphate Cement

Bone cement berbasis calcium phosaphate banyak digunakan dalam aplikasi kedokteran karena memiliki in-situ-setting ability, osteoconductivity, dan bone-replacement capability yang baik. Akan tetapi, calcium phosphate cement memiliki keterbatasan yaitu setting time yang lama, mudah washout, dan memiliki strength yang rendah. Oleh karena itu, pada studi ini penulis mencoba memodifikasi sifat dari calcium phospate cement tersebut dengan memodifikasi molar rasio tetracalcium phosphate (TTCP) dan dicalcium phosphate (DCPA), dan menambahkan chitosan sebagai gelling agent. Modifikasi molar rasio bertujuan untuk menurunkan setting time, sedangkan penambahan chitosan bertujuan untuk meningkatkan washout resistance, mempercepat pertumbuhan apatit dan mempercepat setting time. Modifikasi molar rasio tetracalcium phosphate (TTCP) dan dicalcium phosphate (DCPA) dari 1:1 menjadi 1:2 menunjukan penurunan setting time yang signifikan dari 30 menit menjadi 12 menit untuk sampel tanpa penambahan chitosan, dan untuk sampel dengan penambahan chitosan terjadi penurunan setting time dari 28 menit menjadi 8 menit. Penambahan chitosan terbukti efektif mempercepat setting time sekitar 2-4 menit, mempercepat pertumbuhan apatit dan dapat meningkatkan washout resistance semua sampel