A low-frequency radio halo survey of the South Pole Telescope SZ-selected clusters with the GMRT

ABSTRACT The presence of non-thermal electrons and large-scale magnetic fields in the intracluster medium is known through the detection of megaparsec (Mpc) scale diffuse radio synchrotron emission. Although a significant amount of progress in finding new diffuse radio sources has happened in the last decade, most of the investigation has been constrained towards massive low-redshift clusters. In this work, we explore clusters with redshift z > 0.3 in search of diffuse radio emission, at 325 MHz with the Giant Metrewave Radio Telescope. This campaign has resulted in the discovery of two new radio haloes (SPT-CL J0013−4906 and SPT-CL J0304−4401) along with two other detections (SPT-CL J2031−4037 and SPT-CL J2248−4431), previously reported (at 325 MHz) in the literature. In addition, we detect a halo candidate in one cluster in our sample, and upper limits for haloes are placed in eight clusters where no diffuse emission is detected. In the P1.4–LX plane, the detected haloes follow the observed correlation, whereas the upper limits lie above the correlation line, indicating the possibility of future detection with sensitive observations.

A Study of Ship’s Frictional Resistance in Extremely Shallow Water

In ship model tests, a model-ship correlation line (e.g., the ITTC57 formula) is used to calculate the frictional resistance of both the ship and its scaled model. However, this line is designed for deep water and the effects of water depth is not considered. Research has been conducted to improve the correlation line in shallow water, but studies of the extremely shallow water case (depth/draft, h/T < 1.2) are rare. This study focuses on the friction of two ship types in extremely shallow water, where the ship’s boundary layer cannot develop freely. The physical details are analyzed based on the data generated with Computational Fluid Dynamics (CFD) calculations. The results show that for certain ship types at the same Reynolds number, the frictional resistance becomes smaller when the water is shallower. The geometry of the ship, in addition to the Reynolds number, becomes essential to the prediction of ship’s friction in extremely shallow water. Therefore, this scenario is different from intermediate shallow and deep water, and the prediction method should be considered separately. The data and analysis shown in this study can help to improve the understanding and prediction of ship’s frictional resistance in extremely shallow water.

Characteristics of Organophosphate Ester Formation during Smoking

This study examines the occurrence of organophosphate esters (OPEs) in cigarettes and sidestream cigarette smoke and to see the OPE formation characteristics during smoking. All seven OPEs in both gas and particulate phases were measured in sidestream cigarette smoke for four brands of cigarettes. Tributyl phosphate (TBP), tris(2-butoxyethyl) phosphate (TBEP), tris(2-chloroethyl) phosphate (TCEP), and triphenyl phosphate (TPP) were found frequently. Median total OPE increases in the air samples during smoking were 56.2 ng per cigarette for gas-phase OPEs and 2360 ng per cigarette for particulate-phase OPEs. TBP and TCEP could be absorbed to particles in air more readily than alkans as seen from the correlation line between gas–particle partition coefficients (Kp) and the subcooled liquid vapor pressures (PLº) for alkans. Furthermore, TBP was determined in the cigarettes. Median total OPE decreases in the cigarette samples during smoking were 1200 ng per cigarette. The combustion reaction increased TBP and TBEP levels in cigarettes, and particulate-phase TBEP in air appeared to influence the production of TBP, TCEP, and TPP. TBP and TBEP in cigarettes likely affect the production of TBP, TBEP, TCEP, and TPP in air during smoking.

KORELASI ANTARA SIKAP TOLERANSI DENGAN INTERAKSI SOSIAL DI KELAS SISWA KELAS IV SD GUGUS VII KUTA SELATAN TAHUN PELAJARAN 2017/2018

The purpose of this research was to find out the correlation between tolerance attitudes with social interaction in Elementary School Gugus VII Kuta Selatan Grade 4. The type of this research was ex post facto. Research populationswere all students Grade 4 in Elementary School Gugus VII Kuta Selatan academic period 2017/2018 which has population over 123 students. Sample was determined by proportional technique random sampling with the level of error 5% and the number of sample gained from the populations were 89 students. The data from tolerance attitudes and social interactions were obtained through questionnaire which was answered by the respondents. The prerequisite test was data distribution normality test. After all the prerequisite test fulfilled, statistics analysis that was used in this research is hypothesis test using correlation analysis product moment. Based on the analysis result we found that rcount = 1,205. At a level of signification 5% with n= 89, obtained rtable= 0,213. Because rcount= 1,205 >rtable= 0,213 it means that H0 that said there is no significant correlation between tolerance attitudes with social interactions in Elementary School Gugus VII Kuta Selatan Grade 4 academic period 2017/2018 was rejected and Ha was accepted . The conclusion was there is correlation between tolerance attitudes with social interactions in in Elementary School Gugus VII Kuta Selatan Grade 4, with positive correlation line, which means the higher tolerance attitudes will increase the social interactions in the class.Keywords: tolerance attitude, social interactions in the class

KORELASI ANTARA KECERDASAN LINGUISTIK DENGAN KOMPETENSI PENGETAHUAN BAHASA INDONESIA SISWA KELAS V SD GUGUS I GUSTI NGURAH RAI DENPASAR BARAT TAHUN PELAJARAN 2017/2018

The purpose of this research was to find out the correlation linguistic intelligence with Indonesia language knowledge competencies in Elementary School Gugus I Gusti Ngurah Rai Denpasar Barat Grade V academic period 2017/2018. The type of this research was ex post facto. Research populations were all students Grade V in Elementary School Gugus I Gusti Ngurah Rai Denpasar Barat academic period 2017/2018 which has population over 533 students. Sample was determined by proportional technique random sampling with the level of signification 5% and the number of sample gained from the populations were 218 students. The data retrieved from the recording of language knowledge competencies document Indonesia and linguistic intelligence from essays test by respondents. As the test persyarat is a test of normality distribution data. And the next is testing a hypothesis using correlation analysis product moment. Based on the analysis results we found that rxycount= 0.448. At a level of signification 5% with n = 218, obtained rxytable= 0.138. Because rxycount> rxytable = 0.448 > 0.138 it means that H0 that said there is no significant correlation between linguistic intelligence with Indonesia language knowledge competencies in Elementary School Gugus I Gusti Ngurah Rai Denpasar Barat Grade V academic period 2017/2018 was rejected and Ha was accepted. The conclusion was there is correlation between linguistic intelligence with Indonesia language knowledge competencies in Elementary School Gugus I Gusti Ngurah Rai Denpasar Barat Grade V academic period 2017/2018, with positive correlation line, which means the higher the linguistic intelligence will increase with Indonesia language knowledge competencies of students

Methods of Determination of Frictional Resistance for Prediction of Total Resistance of Inland Waterway Vessels

In the present paper presented are the results of prediction of total resistance of inland waterway vessels based on model test data. In scaling the resistance from model to full scale the extrapolation with two-dimensional frictional resistance formulation (without form factor) was applied, combined with different methods of determination of frictional (viscous) resistance coefficient. There were used the equations that include the effect of water depth, with and without account for pressure gradient. It was shown that limited depth of water substantially affects the frictional resistance. The results of example calculations are compared to resistance prediction made using the ITTC 1957 model-ship correlation line. Example calculations take into account the limited depth of water. Depending on the applied method of determination of frictional resistance coefficient the resultant total resistance of inland waterway vessel is higher or lower than the resistance based on the ITTC 1957 correlation line. The effect of water depth depends on the ratio of water depth to ship draught (h/T), on ship speed, and on the composition of a convoy. The extrapolation of resistance was made without including the form factor. Computations are made based on model test data for an inland waterway cargo vessel, for a kombi-type convoy of an inland waterway cargo vessel and a dumb barge, and for a convoy of two dumb barges without a pushboat.

Establishment of Unified Correlation of In-Plane and Out-of-Plane Constraints with Ductile Fracture Toughness of Steel

In this paper, the finite element method (FEM) based on GTN damage model was used to obtain ductile fracture toughness and investigate the establishment method of unified correlation of in-plane and out-of-plane constraints with ductile fracture toughness of steels. The unified constraint parameter Ap at different equivalent plastic strain (εp) isolines has been calculated and analyzed for SEN(B) specimens with a wide range of in-plane and out-of-plane constraints. The results show that the average Ap along the specimen thickness (Apave) can well characterize a wide range of in-plane and out-of-plane constraints. The suitable εpisolines range for establishing the unified correlation between Apave and ductile fracture toughness of the steel has been obtained. For the specimens with lower constraint, the higher εp values should be used. The results also show that the correlation line of JC/Jref-Apave1/2is independent of the selections of the suitable εp isolines and the reference specimen. This may bring convenience for the establishment and application of the JC/Jref-Apave1/2correlation lines. Using ductile fracture toughness data of a small number of specimens with different constraints (such as three specimens with different a/W) together with FEM calculations of the parameter Ap, the correlation line of JC/Jref-Apave1/2can be established. The correlation line may be used in structural integrity assessments incorporating both in-plane and out-of-plane constraints.

The Chondritic Moon: a solution to the 142Nd conundrum and implications for terrestrial mantle evolution

Recent discoveries that the Earth has a supra-chondritic 142Nd signature have thrown chondritic geochemical Earth models into doubt. Several solutions have been proposed to explain this discrepancy but none has been widely accepted. This paper reviews Nd isotope data for the Moon which bridge the gap between the 142Nd signatures of chondritic meteorites and the accessible Earth. Different chondrite classes define a 142Nd–148Nd correlation line attributed to incomplete mixing of nucleosynthetic components in the solar nebula. Terrestrial standards have 142Nd signatures well above this correlation line, but the 142Nd signature of the Bulk Moon is c. 6 ppm lower than terrestrial (assuming a chondritic Sm/Nd ratio) and falls within error of enstatite chondrites. In view of the demonstrated isotopic similarity between the Earth and Moon, giant impact models require the Moon to be a sample of the early Earth. Therefore, it is inferred that the Earth–Moon system was generated from material similar to enstatite chondrites, but Earth's mantle experienced Sm/Nd fractionation very soon after the Moon-forming collision. Such fractionation processes have been attributed to subduction of early Fe-enriched crust into a deep mantle storage reservoir. Because Sm/Nd fractionation occurred when most 146Sm had already decayed, the hidden incompatible-element-enriched reservoir only became slightly depressed in its 142Nd signature, explaining why this signal has not yet been detected in ocean island basalt sources.