Measurement of Orbital Decay in the Double Neutron Star Binary PSR B2127+11C

We report the direct measurement of orbital period decay in the double neutron star pulsar system PSR B2127+11C in the globular cluster M15 at the rate of $(-3.95 \pm 0.13) \times 10^{-12}$, consistent with the prediction of general relativity at the $\sim 3$ level. We find the pulsar mass to be $m_p = (1.358 \pm 0.010) M_\odot$ and the companion mass $m_c = (1.354 \pm 0.010) M_\odot$. We also report long-term pulse timing results for the pulsars PSR B2127+11A and PSR B2127+11B, including confirmation of the cluster proper motion.Comment: 12 pages, 4 figures, accepted for publication in ApJ

Hubungan Antara Pengetahuan Ibu Tentang Gizi Dengan Status Gizi Anak Umur 1- 3 Tahun Di Desa Mopusi Kecamatan Lolayan Kabupaten Bolaang Mongondow Induk Sulawesi Utara

: This study aimed to determine the relationship between mothers\u27 knowledge about nutrition and nutritional status of children aged 1-3 years in the Mopusi village, Lolayan Bolang Mongondow Induk. This was an analytical study with a cross sectional design. There were 90 samples that met the inclusion and exclusion criteria. Data were collected by using anthropometric measurements and questionnaires and then were analyzed by using Spearman\u27s rho test. The results showed that there was 5.6% samples with nutritional status (BMI/A) very thin, 6.7% underweight, normal 68.9%, obese 18.9%. The nutritional status (H/A) of the samples was 38.9% very short, short 12.2 %, 45.6% normal, and tall 3.3%. There was no relationship of nutritional status of children (BMI/A) with mothers\u27 knowledge about nutrition with ƿ = 0.480 (p <α = 0.05) as well as there was no relationship of nutritional status of children (H/A) with knowledge of maternal nutrition in children aged 1-3 years with ƿ = 0.113 (p <α = 0.05). Conclusion: There was no relationship between nutritional status (BMI/A) as well as (H/A) of children aged 1-3 years with mothers\u27 knowledge about nutrition in Mopusi village, Lolayan Bolaang Mongondow Induk

Age-related alterations in default mode network: Impact on working memory performance

The default mode network (DMN) is a set of functionally connected brain regions which shows deactivation (task-induced deactivation, TID) during a cognitive task. Evidence shows an age-related decline in task-load-related modulation of the activity within the DMN during cognitive tasks. However, the effect of age on the functional coupling within the DMN and their relation to cognitive performance has hitherto been unexplored. Using functional magnetic resonance imaging, we investigated functional connectivity within the DMN in older and younger subjects during a working memory task with increasing task load. Older adults showed decreased connectivity and ability to suppress low frequency oscillations of the DMN. Additionally, the strength of the functional coupling of posterior cingulate (pCC) with medial prefrontal cortex (PFC) correlated positively with performance and was lower in older adults. pCC was also negatively coupled with task-related regions, namely the dorsolateral PFC and cingulate regions. Our results show that in addition to changes in canonical task-related brain regions, normal aging is also associated with alterations in the activity and connectivity of brain regions within the DMN. These changes may be a reflection of a deficit in cognitive control associated with advancing age that results in deficient resource allocation to the task at hand

Metamorphosis of helical magnetorotational instability in the presence of axial electric current

This paper presents numerical linear stability analysis of a cylindrical Taylor-Couette flow of liquid metal carrying axial electric current in a generally helical external magnetic field. Axially symmetric disturbances are considered in the inductionless approximation corresponding to zero magnetic Prandtl number. Axial symmetry allows us to reveal an entirely new electromagnetic instability. First, we show that the electric current passing through the liquid can extend the range of helical magnetorotational instability (HMRI) indefinitely by transforming it into a purely electromagnetic instability. Two different electromagnetic instability mechanisms are identified. The first is an internal pinch-type instability, which is due to the interaction of the electric current with its own magnetic field. Axisymmetric mode of this instability requires a free-space component of the azimuthal magnetic field. When the azimuthal component of the magnetic field is purely rotational and the axial component is nonzero, a new kind of electromagnetic instability emerges. The latter driven by the interaction of electric current with a weak collinear magnetic field in a quiescent fluid gives rise to a steady meridional circulation coupled with azimuthal rotation.Comment: 10 pages, 12 figures, final versio

Profile scaling in decay of nanostructures

The flattening of a crystal cone below its roughening transition is studied by means of a step flow model. Numerical and analytical analyses show that the height profile, h(r,t), obeys the scaling scenario dh/dr = F(r t^{-1/4}). The scaling function is flat at radii r<R(t) \sim t^{1/4}. We find a one parameter family of solutions for the scaling function, and propose a selection criterion for the unique solution the system reaches.Comment: 4 pages, RevTex, 3 eps figure

On rationality of the intersection points of a line with a plane quartic

We study the rationality of the intersection points of certain lines and smooth plane quartics C defined over F_q. For q \geq 127, we prove the existence of a line such that the intersection points with C are all rational. Using another approach, we further prove the existence of a tangent line with the same property as soon as the characteristic of F_q is different from 2 and q \geq 66^2+1. Finally, we study the probability of the existence of a rational flex on C and exhibit a curious behavior when the characteristic of F_q is equal to 3.Comment: 17 pages. Theorem 2 now includes the characteristic 2 case; Conjecture 1 from the previous version is proved wron

Sankati Quality Evaluation of Sorghum Cultivars

Sorghum sankati is a type of thick porridge consumed in South lndia and is prepared by cooking coarse flour grits from either dehulled grain or whole grain. Domestic methods of sankati preparation and consumption are described. Thirty sorghum cuhivars were evaluated for sankati quality by using taste panels at two locations. Grain with intermediate and hard endosperm texture anda white creamy pericarp produced sankati with the preferred qualitie

Cultivar Differences for Gel Consistency in Sorghum

The potential of gel consistency tests in the evaluation of sorghum food quality was investigated. Gelspread of cooled thin porridges exhibitedsignificent cultivar differences and was affected by season, available soil moisture, dehulling and grinding methods. Gel spread was negatively associated with corneousness of the gram andparticle size index of the flour. It was also associated with the roti and ugali properties assessed by taste panelists. The flow of cold flour-KOH gels in test tubes varied among cultivars and deserves more investigations. The value of gel consistency tests in sorghum quality improvement programs is discussed