Experimental investigation of on-deck icing for marine vessels

Marine icing is a complex phenomenon and understanding its growth process is important to construct ice growth models that can be built with remote sensing unit as a mean of generating a more accurate ice chart that can help in the prediction and prevention of the ice accretion on the deck of the vessel/ rig. In an arctic environment, wave impact and splash can significantly affect ice accretion on a marine structure. To predict ice accretion, water sheet breakup behavior onto a surface needs to be studied closely. The freezing behavior of salt water mostly encountered in marine vessels and offshore structures is very complicated compared to fresh water due to the salt content. A comparative effort to analyze the difference and similarity between the differing ice accretion behaviors of salt and fresh water as well as to further examine water sheet splash are the motivation of experimental investigation performed in two separate lab scale test models. The setup preparation, measurement technique, and results are presented. The results show that in fresh water freezing, droplet cooling behavior, splash area and solidification time were mainly affected by the volume of the falling droplets. The presence of salt affects the cooling time as the falling droplet size is increased. The results from the water sheet breakup tests show that jet velocity significantly affects splash size upon breakup. It is also shown that high attack angles are beneficial in low-velocity impacts

Dose- and time-related platelet response with apheresis platelet concentrates and pooled platelets

This study was carried out to compare the post-transfusion platelet increment between the apheresis platelet concentrate (n=74) and pooled platelets (n=54). Pre- and post-transfusion platelet count of the recipient were carried out by automated hematology analyzer. In apheresis platelet concentrate group, the mean 24 hours post-transfusion platelet increment was 47 x 109/L which was statistically significant (p<0.001). On the other hand, in pooled platelets group, the mean 24 hours posttransfusions platelet count increment was 11.0 x 109/L which was also statistically significant (p<0.001). This study concluded that the transfusion of apheresis platelet concentrate was more useful than the transfusion of pooled platelets in terms of platelet count increment and requirement of donor

Dose- and time-related platelet response with apheresis platelet concentrates and pooled platelets

This study was carried out to compare the post-transfusion platelet increment between the apheresis platelet concentrate (n=74) and pooled platelets (n=54). Pre- and post-transfusion platelet count of the recipient were carried out by automated hematology analyzer. In apheresis platelet concentrate group, the mean 24 hours post-transfusion platelet increment was 47 x 109/L which was statistically significant (p<0.001). On the other hand, in pooled platelets group, the mean 24 hours posttransfusions platelet count increment was 11.0 x 109/L which was also statistically significant (p<0.001). This study concluded that the transfusion of apheresis platelet concentrate was more useful than the transfusion of pooled platelets in terms of platelet count increment and requirement of donor

Dose- and time-related platelet response with apheresis platelet concentrates and pooled platelets

This study was carried out to compare the post-transfusion platelet increment between the apheresis platelet concentrate (n=74) and pooled platelets (n=54). Pre- and post-transfusion platelet count of the recipient were carried out by automated hematology analyzer. In apheresis platelet concentrate group, the mean 24 hours post-transfusion platelet increment was 47 x 109/L which was statistically significant (p<0.001). On the other hand, in pooled platelets group, the mean 24 hours posttransfusions platelet count increment was 11.0 x 109/L which was also statistically significant (p<0.001). This study concluded that the transfusion of apheresis platelet concentrate was more useful than the transfusion of pooled platelets in terms of platelet count increment and requirement of donor

Quantum dot polarized light sources

The design, operation and performance of quantum dot spin-polarized vertical cavity surface emitting lasers (VCSELs) and single-photon sources are described and discussed. The effects of spin-induced gain anisotropy on output polarization and threshold current reduction have been studied along with the high-frequency response in a spin-polarized VCSEL. While the output circular polarization in a VCSEL follows the out-of-plane magnetization characteristics of the ferromagnetic spin injector, the output polarization of the spin-polarized single-photon source shows a switching behavior which is explained by invoking the exciton fine structure in the quantum dots and the effects of electron–hole exchange splitting due to in-plane quantum dot rotational asymmetry.Peer Reviewedhttp://deepblue.lib.umich.edu/bitstream/2027.42/90780/1/0268-1242_26_1_014002.pd

A preliminary report on newborn screening of inborn metabolic disorders

Background: Newborn screening (NBS) for metabolic and genetic disorders, which can be treated or modified if detected early in life, can help to prevent potentially disastrous consequences and save a precious life. However, there is no nationwide consensus on neonatal screening in India; hence, several treatable cases may be missed. Objective: The objective of this study was to detect the prevalence of selected metabolic disorders among neonates and to diagnose them as early as possible to minimize the morbidity and mortality. Materials and Methods: This prospective study included all live newborns delivered during period 2015–2016 in a tertiary care neonatal unit in Kolkata. On the 3rd day of life, newborns were subjected to detailed history, with special emphasis on family history and history of consanguinity. This was followed by thorough clinical examination and metabolic screening for congenital hypothyroidism (CH), G6PD deficiency, phenylketonuria (PKU), congenital adrenal hyperplasia (CAH), galactosemia, and cystic fibrosis with heel prick blood sample collected on blotting paper. Results: Of 1373 babies, four babies were screened positive of CH, G6PD deficiency, CAH, and PKU, respectively. However, confirmatory test for PKU came out to be negative. Conclusion: NBS can be an important preventive public health program. Application of tandem mass spectrometry to newborn screening for metabolic disorders offers rapid results and covers a wide range of disorders. However, the screen-positive tests need to be confirmed by actual enzyme assay (for deficiency), chromatography/mass spectroscopy analysis, or DNA testing

Engineering anomalous Floquet Majorana modes and their time evolution in helical Shiba chain

We theoretically explore the Floquet generation of Majorana end modes~(MEMs) (both regular $0$- and anomalous $\pi$-modes) implementing a periodic sinusoidal modulation in chemical potential in an experimentally feasible setup based on one-dimensional chain of magnetic impurity atoms having spin spiral configuration fabricated on the surface of most common bulk $s$-wave superconductor. We obtain a rich phase diagram in the parameter space, highlighting the possibility of generating multiple $0$-/$\pi$-MEMs localized at the end of the chain. We also study the real-time evolution of these emergent MEMs, especially when they start to appear in the time domain. These MEMs are topologically characterized by employing the dynamical winding number. We also discuss the possible experimental parameters in connection to our model. Our work paves the way to realize the Floquet MEMs in a magnet-superconductor heterostructure.Comment: 7.5 Pages + 5 PDF figures (Main Text), 4 Pages + 3 PDF figures (Supplementary Material), Comments are welcom

Gate control and amplification of magnetoresistance in a three-terminal device

Peer Reviewedhttp://deepblue.lib.umich.edu/bitstream/2027.42/98686/1/ApplPhysLett_99_152503.pd

Compound heterozygosity for hemoglobin D and hemoglobin E

We present two cases of compound heterozygous state for hemoglobin (Hb) D and HbE who reported to the hospital for fever and incidentally found moderate microcytic hypochromic anemia. Later on they were investigated by capillary hemoglobin electrophoresis. Capillary Hb electrophoresis revealed compound heterozygous state for hemoglobin D and hemoglobin E. On family screening, father of one patient turned out to be HbD trait and mother as HbE trait. Due to unavailability of parents and siblings of other patient, family screening was not possible. Compound or double heterozygous state for HbD and HbE is rare. There are only six published reported cases of such double heterozygous state for HbD and HbE in Southeast Asia. Marriage between third degree relatives, which are more common among Muslims as well as inter caste marriages, common in some states of India have resulted into this compound heterozygous condition. Such double heterozygous case is clinically silent as compared to HbE/beta thalassemia or HbD/beta thalassemia

A 7 year old girl with anemia and massive hepatosplenomegaly

This article has no abstract. The first 100 words appear below:A 7 year old girl reported to the child outpatient department of a military hospital in Chittagong (South-East part of Bangladesh) Cantonment with the complaints of generalized weakness, loss of appe-tite, gradual distention of the abdomen and weight loss. The child was reasonably well and performing all her daily activities at her own 1 year before. She was also going to the school regularly and was worried when her parents noticed the distension of her abdomen and reluctant to take food adequately. The child also developed weakness and witnessed weight loss. At that time, there was no history of fever, jaundice, vomiting, hematemesis and melena